NR Electric PCS-985TI Instruction Manual

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PCS-985TI

Transformer Relay

Instruction Manual

NR Electric Co., Ltd.

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Page 1 PCS-985TI Transformer Relay Instruction Manual NR Electric Co., Ltd.
Page 3: Health And Safety
Are trained in the care and use of safety apparatus in accordance with safety engineering practices;  Are trained in emergency procedures (first aid). Instructions and Warnings The following indicators and standard definitions are used: PCS-985TI Transformer Relay Date: 2015-05-15...
Page 4: Operating Environment
DC circuit just after switching off the DC power supply. CAUTION!  Earthing Securely earthed the earthing terminal of the device.  Operating environment ONLY use the device within the range of ambient environment and in an environment free of abnormal vibration. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 5 The information in this manual is carefully checked periodically, and nece ssary corrections will be included in future editions. If nevertheless any errors are detected, suggestions for correction or improvement are greatly appreciated. We reserve the rights to make technical improvements without notice. NR ELECTRIC CO., LTD. Tel: +86-25-87178888 Headquarters: 69, Suyuan Avenue, Jiangning, Nanjing 211102, China...
Page 6: Documentation Structure
9 Configurable Function Brief introduction of configurable functions and configuration software. 10 Communication Introduce the communication port and protocol which this relay can support, IEC60970 -5-103, IEC61850 and DNP3.0 protocols are introduced in details. 11 Installation PCS-985TI Transformer Relay Date: 2015-05-15...
Page 7 OR gate Comparator Binary signal via opto-coupler Input signal from comparator with setting I> Input signal of logic setting for function enabling Input of binary signal except those signals via opto-coupler Input of other signal PCS-985TI Transformer Relay Date: 2015-05-15...
Page 8 Ia, Ib, Ic, I0 IL1, IL2, IL3, IN AN, BN, CN L1N, L2N, L3N Ua, Ub, Uc VL1, VL2, VL3 L123 Uab, Ubc, Uca VL12, VL23, VL31 U (voltage) U0, U1, U2 VN, V1, V2 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 9: Table Of Contents
1.2 Functions ........................1-3 1.3 Features..........................1-5 List of Figures Figure 1.1-1 Typical protection scheme 1 of PCS-985TI ............1-1 Figure 1.1-2 Typical protection scheme 2 of PCS-985TI ............1-2 Figure 1.1-3 Typical protection scheme 3 of PCS-985TI ............1-2 Figure 1.1-4 Typical protection scheme 4 of PCS-985TI ............1-3 List of Tables Table 1.2-1 Protective functions of PCS-985TI..............
Page 11: Figure 1.1-1 Typical Protection Scheme 1 Of Pcs-985Ti
. It also provides basic protection of a two-winding main transformer and one or two auxiliary transformer. PCS-985TI provides up to 80 analog input channels including current and voltage inputs. The transformer protections are configurable. Ancillary functions of fault diagnostic, disturbance records, event records and communication function are integrated in the device.
Page 12: Figure 1.1-2 Typical Protection Scheme 2 Of Pcs-985Ti
Main 50P,51P 50G,51G 50Q,51Q 51PALM 59GAlm 64REF Transformer Conventional CT Big-ratio CT Step-down Transformer Figure 1.1-2 Typical protection scheme 2 of PCS-985TI Busbar 1 Busbar 2 Busbar VT Main PCS-985TI Transformer Conventional CT Big-ratio CT Step-down Transformer 50P, 51P 50G,51G...
Page 13: Figure 1.1-4 Typical Protection Scheme 4 Of Pcs-985Ti
Figure 1.1-4 Typical protection scheme 4 of PCS-985TI 1.2 Functions  Protective Functions The protective functions listed in following table are available for PCS-985TI, the functions can be configured according to user’s requirement. Table 1.2-1 Protective functions of PCS-985TI Function...
Page 14: Table 1.2-2 Miscellaneous Functions Of Pcs-985Ti
 Miscellaneous functions Miscellaneous functions are listed in the following table, such as measurement, self-supervision and oscillography, communication functions, and etc. Table 1.2-2 Miscellaneous functions of PCS-985TI Miscellaneous functions Measurement 24 samples per cycle for current and voltage measurement Programmable binary inputs...
Page 15 Modules of the device adopt intelligent design, amount of input and output modules and module slot position are configurable. User can increase or decrease the amount of AC input module, binary input module and binary output module, and terminals of those modules can be defined PCS-985TI Transformer Relay Date: 2015-05-15...
Page 16 The device can record all relevant waveforms of any fault.  High sensitive and securable DPFC biased differential protection DPFC (deviation of power frequency component) biased current differential protection element is PCS-985TI Transformer Relay Date: 2015-05-15...
Page 17  Reliable CT Saturation Detection Based on the operation sequence of DPFC restraint current element and DPFC differential current element of differential protection, external fault with CT saturation or internal fault can be distinguished correctly. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 18 1 Introduction PCS-985TI Transformer Relay Date: 2015-05-15...
Page 19 2.5.1 Environmental Tests......................2-5 2.5.2 Mechanical Tests ......................2-5 2.5.3 Electrical Tests ......................... 2-5 2.5.4 Electromagnetic Compatibility ..................2-5 2.6 Certifications.........................2-6 2.7 Terminals........................2-6 2.8 Measurement Scope and Accuracy ................2-6 2.9 Management Function....................2-7 2.9.1 Control Performance ......................2-7 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 20 2.10.12 Underfrequency Protection..................2-11 2.10.13 Rate-of-Frequency-Change Protection ................2-11 2.10.14 Thermal Overload Protection..................2-11 2.10.15 Impedance Protection ....................2-12 2.10.16 Breaker Failure Protection..................2-12 2.10.17 Pole Disagreement Protection..................2-12 2.10.18 Breaker Flashover Protection ..................2-12 2.10.19 Mechanical Protection ....................2-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 21: Electrical Specifications
110Vdc/125Vdc, 220Vdc/250Vdc Variation 88~300Vdc ≤15% of the nominal auxiliary voltage Permissible AC ripple voltage Burden Quiescent condition <35W Operating condition <65W 2.1.4 Transducer Input Standard IEC 60255-1: 2009 Input range 0-20mA 0-5V 235Ω Input resistance 20kΩ PCS-985TI Transformer Relay Date: 2015-05-15...
Page 22: Binary Input
10000 operations Number Up to 44 trip output according to various hardware configurations Signal contact Output mode Potential free contact 8A@380Vac Continuous carry 8A@250Vdc Pickup time (Typical) <10 ms (typical 3ms) Drop-off time <10 ms PCS-985TI Transformer Relay Date: 2015-05-15...
Page 23: Mechanical Specifications
Standard IEC 60225-1: 2009 Operating temperature -40° C to +70° C (Readability of display may be impaired below -20° C) Transport and storage temperature -40° C to +70° C range Permissible humidity 5%-95%, without condensation PCS-985TI Transformer Relay Date: 2015-05-15...
Page 24: Communication Port
Type RS-232 Baud Rate 4.8kbit/s, 9.6kbit/s, 19.2kbit/s, 38.4kbit/s, 57.6kbit/s, 115.2kbit/s ® Printer type EPSON 300K printer Safety le vel Isolation to ELV level 2.4.5 Clock Synchronization Port Type RS-485 Transmission distance <500m Ma ximal capacity PCS-985TI Transformer Relay Date: 2015-05-15...
Page 25: Type Tests
10V/m (rms), f=80MHz/160MH z/450MH z/900 MHz Radiated pulse-modulated 10V/m (rms), f=900MHz IEC 60255-22-4:2008 Power supply, I/O, Earth: class Ⅳ, 4kV, 2.5kH z, 5/50ns Fast transient disturbance tests Communication terminals: class Ⅳ, 2kV, 5kHz, 5/50ns Surge immunity test IEC 60255-22-5:2008 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 26: Certifications
Contact I/O Crimp terminals, 1.0mm ~2.5mm lead Grounding (Earthing) Connection BVR type, 2.5mm² ~6.0mm lead 2.8 Measurement Scope and Accuracy Item Range Accuracy ≤±3° Phase range 0° ~ 360° ≤ 0.02Hz Frequency fn±3 Hz PCS-985TI Transformer Relay Date: 2015-05-15...
Page 27: Management Function
There are some symbols mentioned in the following sections and the meaning of them is given here. Un – the secondary rated voltage of VT In – the secondary rated current of CT pu – per-unit value Id – the differential current – the overexcitation multiples PCS-985TI Transformer Relay Date: 2015-05-15...
Page 28: Main Transformer Current Differential Protection
60Hz: ≤ 30ms (Id>2xSetting) 2.10.2.2 Instantaneous Differential Element Current setting 2~14 pu, 0.01pu steps Drop-off current 0.95×Setting ≤2.5%xSetting or 0.02 pu, whichever is greater Tolerance of current setting 50Hz: ≤ 30ms (Id>1.5xSetting) Operating time 60Hz: ≤ 30ms (Id>1.5xSetting) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 29: Restricted Earth Fault Protection
≤2.5% of setting or 0.02In, whichever is greater Tolerance of current setting ≥95% Drop-off to pickup ratio Definite-time time delay 0~3000.00s ≤1% of setting +40ms (at 2 times current setting) Tolerance of definite-time time delay Phase-to-phase undervoltage setting 2.00~120.00V, steps 0.01 V PCS-985TI Transformer Relay Date: 2015-05-15...
Page 30: Ground Overcurrent Protection
≤1%Setting+40ms (at 0.8 times voltage setting) Tolerance of definite-time time delay ≤2.5% operating time or 40ms, whichever is greater (for voltage Operating time of inverse-time overvoltage element between 0.5 and 0.8 multiples of pickup) 2-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 31: Residual Overvoltage Protection
2.10.14 Thermal Overload Protection Base current setting range 0.04In~20In, steps 0.01A ≤2.5% of setting or 0.02In, whichever is greater Tolerance of current setting Thermal overload time constant 0.10~100.00 Min Thermal accumulation coefficient 1.00~3.00 Drop-off to pickup ratio PCS-985TI Transformer Relay 2-11 Date: 2015-05-15...
Page 32: Impedance Protection
Tolerance of current setting Time delay 0.01~10.00s ≤1%Setting + 40ms (at 2 times current setting) Tolerance of time setting 2.10.19 Mechanical Protection Delay pickup up time delay 0~6000.00s ≤1% of Setting +40ms Tolerance of time delay 2-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 33 3.4.2 Function......................... 3-39 3.4.3 Protection Principle ......................3-39 3.4.4 Logic..........................3-40 3.4.5 Inputs and Outputs......................3-41 3.4.6 Settings ......................... 3-43 3.5 Overexcitation Protection (24) ................3-44 3.5.1 Application ........................3-44 3.5.2 Function Description ...................... 3-44 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 34 3.8.4 Logic..........................3-72 3.8.5 Inputs and Outputs......................3-74 3.8.6 Settings ......................... 3-76 3.9 Phase Overvoltage Protection (59P) ..............3-78 3.9.1 Application ........................3-78 3.9.2 Function Description ...................... 3-79 3.9.3 Protection Principle ......................3-79 3.9.4 Logic..........................3-80 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 35 3.12.6 Settings........................3-99 3.13 Underfrequency Protection (81U) ..............3-101 3.13.1 Application ......................... 3-101 3.13.2 Function Description ....................3-101 3.13.3 Protection Principle ....................3-101 3.13.4 Logic .......................... 3-102 3.13.5 Inputs and Outputs..................... 3-104 3.13.6 Settings........................3-107 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 36 3.17.1 Application ......................... 3-129 3.17.2 Function Description ....................3-129 3.17.3 Protection Principle ....................3-130 3.17.4 Logic .......................... 3-131 3.17.5 Input and Output ......................3-132 3.17.6 Settings........................3-133 3.18 Pole Disagreement Protection (62PD) ............3-133 3.18.1 Application ......................... 3-134 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 37 3.21.2 Function Description ....................3-150 3.21.3 Protection Principle ....................3-150 3.21.4 Logic .......................... 3-153 3.21.5 Inputs and Outputs..................... 3-154 3.21.6 Settings........................3-155 3.22 Step-down Transformer LV Side Ground Overcurrent Protection (50/51G ) ............................3-156 3.22.1 Application ......................... 3-157 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 38 3.25.2 Function Description ....................3-170 3.25.3 Principle........................3-170 3.25.4 Logic .......................... 3-170 3.25.5 Inputs and Outputs..................... 3-171 3.25.6 Settings........................3-172 3.26 Three-Phase Current Element (Curr3P)............3-173 3.26.1 Application ......................... 3-173 3.26.2 Function Description ....................3-173 3.26.3 Principle........................3-173 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 39 Figure 3.2-5 Logic diagram of steady-state current differential element of transformer.. 3-19 Figure 3.2-6 Logic diagram of DPFC current differential element of main transformer ... 3-20 Figure 3.2-7 Function block diagram of transformer current differential protection ..3-21 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 40 Figure 3.8-5 Logic diagram of direction element of main transformer ground overcurrent protection ..........................3-73 Figure 3.8-6 Logic diagram of harmonic blocking element..........3-74 Figure 3.8-7 Function block diagram of main transformer ground overcurrent protection ............................... 3-74 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 41 Figure 3.17-1 Logic diagram of breaker failure protection ..........3-131 Figure 3.17-2 Function block diagram of breaker failure protection ....... 3-132 Figure 3.18-1 Logical diagram of pole disagreement protection ........3-135 Figure 3.18-2 Function block diagram of pole disagreement protection......3-136 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 42 Table 3.2-1 Phase shift matrix for phase compensation ............3-5 Table 3.2-2 Input signals of transformer current differential protection ......3-21 Table 3.2-3 Output signals of transformer current differential protection ......3-21 Table 3.2-4 Output signals of transformer current differential protection (event recorder) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 43 Table 3.6-4 Output signals of main transformer phase overcurrent protection (event recorder)..........................3-61 Table 3.6-5 Output signals of main transformer phase overcurrent protection (measurements) ........................3-61 Table 3.6-6 Settings list of main transformer phase overcurrent protection ....3-62 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 44 Table 3.11-5 Settings list of residual overvoltage protection..........3-92 Table 3.12-1 Input signals of overfrequency protection ............. 3-97 Table 3.12-2 Output signals of overfrequency protection ..........3-97 Table 3.12-3 Output signals of overfrequency protection (event recorder) ...... 3-97 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 45 Table 3.18-2 Output signals of pole disagreement protection ......... 3-136 Table 3.18-3 Output signals of pole disagreement protection (event recorder) ..... 3-136 Table 3.18-4 Settings list of pole disagreement protection..........3-137 Table 3.19-1 Input signals of breaker flashover protection..........3-141 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 46 Table 3.22-2 Input signals of step-down transformer LV side ground overcurrent protection ............................. 3-160 Table 3.22-3 Output signals of step-down transformer LV side ground overcurrent protection ..........................3-160 Table 3.22-4 Output signals of step-down transformer LV side ground overcurrent protection (event recorder) ....................3-161 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 47 Table 3.28-1 Input signals of single current element with filter ........3-188 Table 3.28-2 Output signals of residual current element ..........3-188 Table 3.28-3 Output signals of residual current element (measurements) ..... 3-188 Table 3.28-4 Settings list of residual current element ............3-189 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 48 Table 3.29-1 Input signals of residual voltage element ............ 3-190 Table 3.29-2 Output signals of residual voltage element ..........3-190 Table 3.29-3 Output signals of residual voltage element (measurements) ..... 3-190 Table 3.29-4 Settings list of residual voltage element ............3-191 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 49: Overview
It is suitable for two-winding transformer and three-winding transformer. For Y-Y, △→△, △→Y and Y→△ connection, all possible vector combinations have been taken  into account, so it is very flexible.  Optional inrush current distinguished principles and inrush current blocking method, which PCS-985TI Transformer Relay Date: 2015-05-15...
Page 50: Protection Principle
CT ratio. The current value difference between each side shall be eliminated before calculation for current differential protection by amplitude compensation. The nameplate parameters of the transformer (includes the rated apparent power and the rated PCS-985TI Transformer Relay Date: 2015-05-15...
Page 51 CT ratio of side m.  Calculate differential adjust coefficient  Base  bBase Equation 3.2-3 bBrm  bBase nBase bBrm nBrm Where: Brm=Branch (side) “m”. are rated secondary current of calculated side and referenced side of 2bBrm 2bBase PCS-985TI Transformer Relay Date: 2015-05-15...
Page 52 If HV side is set as the referenced side, the HV side is Y connection, so the phase shift matrix corresponds to 1 o’clock is adopted to compensate HV side current. It is 11 o'clock for LV side PCS-985TI Transformer Relay Date: 2015-05-15...
Page 53 (Shift 180° leading)              (Shift 150° lagging)            (Shift 120° lagging)     PCS-985TI Transformer Relay Date: 2015-05-15...
Page 54 Where: in the equation are the secondary current vectors of side m (m=1, 2, 3, 4, 5, 6).    are corrected secondary current vectors of side m (m=1, 2, 3, 4, 5, 6). PCS-985TI Transformer Relay Date: 2015-05-15...
Page 55 Magnitude compensation Magnitude compensation 2bBr1 2bBr2 I'_H I'_L Calculate differential current and restraint current Figure 3.2-1 Transformer current compensation calculation process In above figure: Ip_H, Ip_L are primary current vectors of HV and LV side respectively. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 56 The above results show that Id = 2Ir during an internal fault. I.e. the operation characteristic of current differential protection for internal fault is a straight line with a slope of 2. 3.2.3.5 Sensitive Biased Differential Element The operation equation of sensitive biased differential element is: PCS-985TI Transformer Relay Date: 2015-05-15...
Page 57 Conventional biased differential element with higher pickup current and higher restraint coefficient comparing with sensitive biased differential element is equipped. Its biased res traint characteristic can make the differential element not operate due to CT transient and steady-state saturation PCS-985TI Transformer Relay Date: 2015-05-15...
Page 58 The operation criteria of DPFC differential element are as follows:             Equation 3.2-10         3-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 59 For the restraint coefficient of transformer DPFC differential element can take a higher value, so it has high ability to eliminate the effect of transient and steady-state CT saturation during an external fault. Transformer DPFC differential element improves the sensitivity for detecting transformer internal slight fault. PCS-985TI Transformer Relay 3-11 Date: 2015-05-15...
Page 60 Figure 3.2-3 Operation characteristic curve of DPFC differential element of main transformer Current differential protection carries out the fault discrimination according to the current of each phase. If the current criteria are met and no related blocking element(s) operate, differential 3-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 61 [Y.87T.K_Hm2_Inrush], [Y.87T.K_Hm2_Inrush]=0.15 is recommended. Users can select the second harmonic criterion or wave distortion criterion (see following section) to distinguish inrush current. PCS-985TI Transformer Relay 3-13 Date: 2015-05-15...
Page 62 , c } [ .87 . _ T K Hm Inrush ] Max( a , b , c ) Equation 3.2-14  Cross Blocking Mode If the following criterion is met, the three-phase differential protection will be blocked. 3-14 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 63 CT.         Equation 3.2-17        Where: is the fundamental component of one phase differential current.  PCS-985TI Transformer Relay 3-15 Date: 2015-05-15...
Page 64 [Y.87T.Alm_Diff] with a time delay of 300ms, this alarm signal will not block the differential element. The signal will reset if the differential current disappears with a time delay of 10s.    Equation 3.2-19   k * I is the differential current. is the restraint current. 3-16 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 65: Logic
Once the differential CT circuit failure alarm is issued, the CT circuit should be check carefully, only if the fault is cleared, the reset operation can be conducted. 3.2.4 Logic For transformer current differential protection, if following three conditions are met, the protection PCS-985TI Transformer Relay 3-17 Date: 2015-05-15...
Page 66 Idmax is the maximum value of three phase differential currents. I  is the DPFC differential current. I  is the floating threshold varied with the change of differential current. is the fixed threshold. 3-18 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 67 Flg_CTSaturation is the internal flag indicating that CT saturation is detected. Flg_Inrush_ConvBiasDiff is the internal flag indicating that inrush current is detected for conventional biased differential element. Flg_Inrush_SensBiasDiff is the internal flag indicating inrush current is detected for sensitive PCS-985TI Transformer Relay 3-19 Date: 2015-05-15...
Page 68 Flg_CTS is the internal flag indicating that differential CT circuit failure is detected. Tr.87T.FD_DPFC is the signal indicating that the fault detector of DPFC differential element picks up (the fault detector of fault detector DSP module). 3-20 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 69: Inputs And Outputs
Above input and output signals can be used for programmable logic, and following output signals are only for LCD display and waveform recording function of the device. Table 3.2-4 Output signals of transformer current differential protection (event recorder) Signal Description Tripping reports PCS-985TI Transformer Relay 3-21 Date: 2015-05-15...
Page 70 Main menu -> Measurements -> Measurements1-> Tr Values-> Tr Diff Values Main menu -> Measurements -> Measurements2-> Tr Values-> Tr Diff Values ST1.87T.Ida Three-phase differential current amplitude of step-down ST1.87T.Idb transformer 1. ST1.87T.Idc ST1.87T.Ira Three-phase restraint current amplitude of step-down ST1.87T.Irb transformer 1. ST1.87T.Irc 3-22 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 71 Main menu -> Measurements -> Measurements2-> Phase Angle-> ST2 PhaseAngle Values The secondary rated current of branch m of main Tr.87T.I2b_Brm transformer (m=1,2,3,4,5,6). The secondary rated current of branch m of step-down ST1.87T.I2b_Brm transformer 1 (m=1,2,3). PCS-985TI Transformer Relay 3-23 Date: 2015-05-15...
Page 72 Main menu -> Measurements -> Measurements2-> Prot Values-> Tr Diff Prot Values Main menu -> Measurements -> Measurements2-> Prot Values-> ST1Diff Prot Values Main menu -> Measurements -> Measurements2-> Prot Values-> ST2 Diff Prot Values 3-24 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 73: Settings
0: disable Y.87T.En_CTS_Blk transformer biased differential element 1: enable being blocked by CT circuit failure. Logic setting of selecting the inrush current distinguishing method of transformer biased Y.87T.Opt_Inrush_Ident Waveform differential element: 0: Hm2 PCS-985TI Transformer Relay 3-25 Date: 2015-05-15...
Page 74 “1” and other bits shall be set as “0”. Then a hexadecimal number 00000029H is formed as the tripping output logic setting of transformer differential protection. Please note that tripping output logic settings of the equipment have to be set on basis of application-specific drawings. 3-26 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 75: Restricted Earth Fault Protection (64Ref)
3.3.3.2 Amplitude Compensation Generally, the magnitudes of secondary current of each side of transformer are different due to the difference of CT ratio. The current value difference between each side shall be adjusted before PCS-985TI Transformer Relay 3-27 Date: 2015-05-15...
Page 76   Where: in the equation are the residual current vectors of each side, and is the neutral point measured residual current vectors. are the adjust coefficients of each side and neutral point side. 3-28 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 77 Its biased restraint characteristic can make the differential element not operate due to CT transient and steady-state saturation during external fault, and it can operate reliably even the CT is seriously saturated during internal PCS-985TI Transformer Relay 3-29 Date: 2015-05-15...
Page 78 It can ensure the sensitivity of differential protection and avoid the unwanted operation when CT is saturated during an external fault. Its operation area is the tint shadow area in the figure above. 3-30 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 79 CT during an external fault, the second and third harmonics of residual differential current are used for the protection device to discriminate CT saturation.     0 _ 2 0 _1  Equation 3.3-7     0 _ 3 0 _1 PCS-985TI Transformer Relay 3-31 Date: 2015-05-15...
Page 80 [Y.64REF.Alm_Diff] will be issued with a time delay of 300ms, this alarm signal will not block the differential element. The signal will reset if the differential current disappears with a time delay of 10s. 3-32 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 81: Logic
If restricted earth fault protection is disabled, all the related output signals will be reset. If no external input is configured to [Y.64REF.En1] ([Y.64REF.En2]), the default initial value of [Y.64REF.En1] ([Y.64REF.En2]) is “1”; if no external input is configured to [Y.64REF.Blk], the default initial value of [Y.64REF.Blk] is “0”. PCS-985TI Transformer Relay 3-33 Date: 2015-05-15...
Page 82 Flg_3rd_Harm is the internal flag indicating that the third harmonic current blocking condition is met. FD_BiasedDiff is the signal indicating that the fault detector of restricted earth fault protection picks up. Flg_CTSaturation_Neu is the internal flag indicating that the neutral point CT is saturated. 3-34 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 83: Inputs And Outputs
Biased differential element of restricted earth fault protection operates. Start signals Y.64REF.St Transformer restricted earth fault protection starts. Alarm signals Y.64REF.Alm_Diff Alarm message indicating residual differential current is abnormal. Waveform recording Y.64REF.TrigDFR Transformer restricted earth fault protection operates to trigger waveform PCS-985TI Transformer Relay 3-35 Date: 2015-05-15...
Page 84 Main menu -> Measurements -> Measurements2-> Phase Angle-> ST1 PhaseAngle Values Main menu -> Measurements -> Measurements2-> Phase Angle-> ST2 PhaseAngle Values Adjust coefficient of branch m for transformer restricted Y.64REF.K_Brm earth fault protection (m=1,2,3,4). 3-36 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 85: Settings
Coefficient of 2 harmonic for transformer Y.64REF.K_Hm2_Inrush 0.05~0.50 0.01 inrush current detection. Coefficient of 3 harmonic for transformer Y.64REF.K_Hm3_Inrush 0.05~0.50 0.01 inrush current detection. Y.64REF.OutMap 0~3FFFFFFF Tripping logic setting transformer PCS-985TI Transformer Relay 3-37 Date: 2015-05-15...
Page 86: Negative-Sequence Overcurrent Protection (50/51Q)
Besides, the negative-sequence overcurrent protection can also be applied to detect the open, fault or polarity error of the CT circuit. 3-38 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 87: Function
         t(I) Equation 3.4-2         Where: is the base current setting, corresponds to the setting [Y.50/51Q2.Ib_Set]. PCS-985TI Transformer Relay 3-39 Date: 2015-05-15...
Page 88: Logic
Please refer to Section 3.6.3.4 for details. Voltage controlled element of negative-sequence overcurrent protection can be configured through the software PCS-Explorer. 3.4.4 Logic For stage x of negative-sequence overcurrent protection, if following three conditions are met, 3-40 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 89: Inputs And Outputs
Y.50/51Qx.FD is the internal signal indicating that stage x of negative -sequence overcurrent protection picks up (the fault detector of fault detector DSP module). 3.4.5 Inputs and Outputs 50/51Q Y.50/51Qx.I3P Y.50/51Qx.St Y.50/51Qx.VCE Y.50/51Qx.Op Y.50/51Qx.En1 Y.50/51Qx.En2 Y.50/51Qx.Blk Figure 3.4-2 Function block diagram of negative-sequence overcurrent protection PCS-985TI Transformer Relay 3-41 Date: 2015-05-15...
Page 90 Inverse-time accumulate value stage Y.50/51Q2.Accu negative-sequence overcurrent protection. Access Path: Main menu -> Measurements -> Measurements2-> Prot Status->Tr HVS PPF Prot Values Main menu -> Measurements -> Measurements2-> Prot Status->Tr MVS PPF Prot Values 3-42 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 91: Settings
Y.50/51Q2.C 0~20 0.001 negative-sequence overcurrent protection. The exponent alpha of stage 2 of Y.50/51Q2.Alpha 0.02~5 0.001 negative-sequence overcurrent protection. Logic setting for selecting operating Y.50/51Q2.Opt_Curve 0~13 characteristic curve stage negative-sequence overcurrent protection. PCS-985TI Transformer Relay 3-43 Date: 2015-05-15...
Page 92: Overexcitation Protection (24)
(U/f) and the tripping time (t), users can configure it flexibly according to the required over-excitation time characteristics. 3.5.3 Protection Principle 3.5.3.1 Calculation of Overexcitation Multiple Overexcitation multiples can be expressed by following equation: n  Equation 3.5-1 3-44 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 93 [24.DT.K] is overexcitation multiple setting of definite-time overexcitation protection tripping stage.  Alarm stage For Definite-time overexcitation protection alarm stage, the operation equation is: >[24.K_Alm] Equation 3.5-3 Where: is the overexcitation multiple. [24.K_Alm] is overexcitation multiple setting of definite-time overexcitation protection alarm stage. PCS-985TI Transformer Relay 3-45 Date: 2015-05-15...
Page 94: Logic
≤t1 ≤ t2 ≤ t3 ≤ t4 ≤ t5 ≤ t6 ≤ t7 3.5.4 Logic For each tripping stage of overexcitation protection, if following three conditions are met, the protection will be enabled. 3-46 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 95 24.DT.FD is the internal signal indicating that the definite-time overexcitation protection picks up (the fault detector of fault detector DSP module). 24.IDMT.FD is the internal signal indicating that the inverse-time overexcitation protection picks up (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-47 Date: 2015-05-15...
Page 96: Inputs And Outputs
24.St Tripping stage of overexcitation protection starts. Alarm signals 24.Alm The alarm stage of overexcitation protection operates to issue alarm signal Waveform recording Tripping stage of overexcitation protection operates to trigger waveform 24.TrigDFR recording. 3-48 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 97: Settings
0.01 inverse-time overexcitation protection Time delay setting corresponds 24.IDMT.t1_Op 1~3000 overexcitation multiple setting 1 Overe xcitation multiple setting 24.IDMT.K2 1.00~2.00 0.01 inverse-time overexcitation protection Time delay setting corresponds 24.IDMT.t2_Op 1~3000 overexcitation multiple setting 2 PCS-985TI Transformer Relay 3-49 Date: 2015-05-15...
Page 98: Main Transformer Phase Overcurrent Protection (50/51P)
In order to prevent the phase overcurrent protection from mal-operation when energizing a transformer without load, harmonic blocking element can be applied to phase overcurrent protection (harmonic blocking element is not available for main 3-50 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 99: Function Description
Direction element: one direction element shared by all phase overcurrent elements.  Harmonic blocking element: Second harmonic blocking function is available (harmonic blocking element is not available for main transformer low voltage side phase overcurrent protection). PCS-985TI Transformer Relay 3-51 Date: 2015-05-15...
Page 100 “0”. Stage 3 can be selected as definite-time or inverse-time characteristic, and inverse-time operating time curve is as follows. 3-52 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 101 ANSI Long-time very inverse 28.55 0.712 ANSI Long-time inverse 0.086 0.02 0.185 Programmable user-defined available curves do not comply with user application, user can configure [Y.50/51P3.Opt_Curve] as “13” to customize the inverse-time curve characteristic (by configuring PCS-985TI Transformer Relay 3-53 Date: 2015-05-15...
Page 102 Positive-sequence voltage (U1) is adopted as polarizing voltage, and pre-fault memory positive-sequence voltage is used during three-phase close-up faults to ensure the direction element working properly. Phase current (Ip) is adopted for calculation of direction element, and if 3-54 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 103 Figure 3.6-3 (Wherein the hatched portion is the operation zone of forward direction element). Symbol” ” represents the positive polarity of current transformer. Reverse Forward Protected Object Direction Element Figure 3.6-2 Connection of VT and CT of direction element PCS-985TI Transformer Relay 3-55 Date: 2015-05-15...
Page 104 Operation criterion:   [50 / 51 . _ P K Hm Equation 3.6-6 Where: is the second harmonic of any phase current is the fundamental component of corresponding phase current. 3-56 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 105: Logic
For stage x of phase overcurrent protection, if following three conditions are met, stage x of phase overcurrent protection is enabled. (1) Logic setting [Y.50/51Px.En] is set as “1”. (2) The protection function enabling inputs [Y.50/51Px.En1], [Y.50/51Px.En2] are “1” (3) The protection function blocking input [Y.50/51Px.Blk] is “0”. PCS-985TI Transformer Relay 3-57 Date: 2015-05-15...
Page 106 (the fault detector of fault detector DSP module). [Y.50/51P.En] & & [Y.50/51P.Blk] [Y.50/51P.VCE.Op_Upp] Y.50/51P <[ .Upp_VCE] &  ≥1 VT circuit failure & [Y.50/51P.En_VTS_Blk] Figure 3.6-5 Logic diagram of phase-to-phase VCE of main transformer phase overcurrent protection 3-58 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 107 Figure 3.6-7 Logic diagram of direction element of main transformer phase overcurrent protection Where: [Y.50/51P.I3P] is the three-phase current input. [Y.50/51P.U3P] is the three-phase voltage input. [Y.50/51P.DIR.Op] is the internal signal indicating that the direction element operates. PCS-985TI Transformer Relay 3-59 Date: 2015-05-15...
Page 108: Inputs And Outputs
Stage 1 of phase overcurrent protection operates. Y.50/51P2.Op Stage 2 of phase overcurrent protection operates. Y.50/51P3.Op Stage 3 of phase overcurrent protection operates. Y.50/51P1.St Stage 1 of phase overcurrent protection starts. Y.50/51P2.St Stage 2 of phase overcurrent protection starts. 3-60 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 109 The internal signal indicating that the direction element Y.50/51P.DIR.Op operates. The signal indicating that the voltage controlled element Y.50/51P.VCE.Op operates. The signal indicating that the harmonic blocking element is Y.50/51P.HMB.Op released (not available for main transformer LV side). PCS-985TI Transformer Relay 3-61 Date: 2015-05-15...
Page 110: Settings
Current setting of stage 1 of phase Y.50/51P1.I_Set 0.05~20.00In 0.01 overcurrent protection. Time delay of stage 1 of phase overcurrent Y.50/51P1.t_Op 0~3000 0.01 protection. Y.50/51P1.OutMap 0~3FFFFFFF Tripping logic setting of stage 1 of phase 3-62 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 111 Time factor setting of stage 3 of phase Y.50/51P3.TMS 0.05~10.00 0.01 overcurrent protection. Minimum time delay of stage 3 of phase Y.50/51P3.tmin 0~10 0.01 overcurrent protection. Y.50/51P3.K 0~120 0.01 The constant K of stage 3 of phase PCS-985TI Transformer Relay 3-63 Date: 2015-05-15...
Page 112: Phase Overcurrent Alarm Elements (51Palm)
Corresponds to phase overcurrent alarm elements of step-down transformer 2 high ST2_HVS.51PAlm voltage side. 3.7.1 Application During overload operation of a power transformer, great current results in greater heat will lead to 3-64 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 113: Function
3.7.4 Logic [Y.51PAlmx.En] & [Y.51PAlmx.En1] [Y.51PAlmx.En2] & [Y.51PAlmx.Blk] [Y.51PAlmx.St] [Y.51PAlmx.I3P] [Y.51PAlmx.t_Op] 0ms [Y.51PAlmx.Alm] [Y.51PAlmx.I_Set] Figure 3.7-1 Logic diagram of phase overcurrent alarm elements (x=1, 2, 3) PCS-985TI Transformer Relay 3-65 Date: 2015-05-15...
Page 114: Inputs And Outputs
Stage 3 of phase overcurrent element operates to issue alarm signal. Start signals Y.51PAlm1.St Stage 1 of phase overcurrent element starts. Y.51PAlm2.St Stage 2 of phase overcurrent element starts. Y.51PAlm3.St Stage 3 of phase overcurrent element starts. 3-66 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 115: Settings
In order to avoid the effect of transformer inrush current, second harmonic blocking element can be applied to ground overcurrent protection. 3.8.2 Function Ground overcurrent protection has following functions  Three-stage ground overcurrent protection with independent logic, current and time delay PCS-985TI Transformer Relay 3-67 Date: 2015-05-15...
Page 116: Protection Principle
Harmonic restraint Element signal Stage3 Ground Overcurrent Element Figure 3.8-1 Function diagram of ground overcurrent protection 3.8.3.2 Residual Current Element The operation criterion of each stage of ground overcurrent protection is: 3I >[Y.50/51Gx.3I0_Set] Equation 3.8-1 3-68 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 117 Table 3.8-1 Inverse-time curve parameters of stage 3 of main transformer ground overcurrent protection α Y.50/51G3.Opt_Curve Time Characteristic Definite time IEC Normal inverse 0.14 0.02 IEC Very inverse 13.5 PCS-985TI Transformer Relay 3-69 Date: 2015-05-15...
Page 118 U  When a fault occurs at forward direction, the angle polarizing voltage leading fault current I     Equation 3.8-3  When a fault occurs at reverse direction, the angle 3-70 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 119 [Y.50/51G.En_VTS_Blk] is set as “1”, the direction element will not pick up when VT circuit fails; if the setting is set as “0”, and direction element meet the criterion, direction element will pick up. PCS-985TI Transformer Relay 3-71 Date: 2015-05-15...
Page 120: Logic
If no external input is configured to [Y.50/51Gx.En1] ([Y.50/51Gx.En2]), the default initial value of [Y.50/51Gx.En1] ([Y.50/51Gx.En2]) is “1”; if no external input is configured to [Y.50/51Gx.Blk], the default initial value of [Y.50/51Gx.Blk] is “0”. 3-72 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 121 Figure 3.8-5 Logic diagram of direction element of main transformer ground overcurrent protection Where: [Y.50/51Gx.I3P] is the three-phase current input. [Y.50/51Gx.I1P] is single phase current input for ground overcurrent protection, generally it is the measured residual current. PCS-985TI Transformer Relay 3-73 Date: 2015-05-15...
Page 122: Inputs And Outputs
Protection function enabling input1 and input 2, it can be binary inputs or settings, such as function enabling binary inputs, logic links, etc. Y.50/51Gx.En2 Y.50/51Gx.Blk Protection function blocking input, such as function blocking binary input. Y.50/51Gx.VCE Residual voltage control input for stage x of ground overcurrent protection. 3-74 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 123 The internal signal indicating that the direction element of Y.50/51Gx.DIR.Op stage x (x=1, 2 or 3) operates. The signal indicating that the harmonic blocking element of Y.50/51Gx.HMB.Op stage x (x=1, 2 or 3) is released. PCS-985TI Transformer Relay 3-75 Date: 2015-05-15...
Page 124: Settings
Logic setting enabling/disabling Y.50/51G1.En_Hm2_Blk 0, 1 harmonic blocking element of stage 1 of ground overcurrent protection. Logic setting to select the current that Y.50/51G1.Opt_3I0 0, 1 adopted by stage 1 of ground overcurrent protection 3-76 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 125 Minimum time delay of stage 3 of ground Y.50/51G3.tmin 0~10 0.01 overcurrent protection. The constant K of stage 3 of ground Y.50/51G3.K 0~120 0.01 overcurrent protection. The constant C of stage 3 of ground Y.50/51G3.C 0~20 0.01 overcurrent protection. PCS-985TI Transformer Relay 3-77 Date: 2015-05-15...
Page 126: Phase Overvoltage Protection (59P)
Overvoltage protection is provided to protect the operating equipment against the risk due to abnormal rise of voltage. 3-78 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 127: Function Description
Stage 1 of phase overvoltage protection for tripping and the phase overvoltage protection for alarm are definite-time overvoltage protection fixedly. Stage 2 of phase overvoltage protection for tripping can be configured as inverse-time overvoltage PCS-985TI Transformer Relay 3-79 Date: 2015-05-15...
Page 128: Logic
[Y.59Px.U3P] is the three-phase voltage input for alarm or tripping stage of phase overvoltage protection. Y.59Px.FD is the signal to indicate that the fault detector of overvoltage protection picks up (the fault detector of fault detector DSP module). 3-80 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 129: Inputs And Outputs
Phase overvoltage protection alarm stage operates to issue alarm signal. Start signals Y.59P1.St Phase overvoltage protection tripping stage 1 starts. Y.59P2.St Phase overvoltage protection tripping stage 2 starts. Y.59PAlm.St Phase overvoltage protection alarm stage starts. Waveform recording PCS-985TI Transformer Relay 3-81 Date: 2015-05-15...
Page 130: Settings
It is invalid if the logic setting [59P2.Opt_Curve] is set as “0”. Minimum time delay of stage 2 of inverse-time Y.59P2.tmin 0~10 0.01 phase overvoltage protection. It is invalid if the logic setting [59P2.Opt_Curve] is set as “0”. 3-82 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 131: Phase Undervoltage Protection (27P)
The phase undervoltage protection for alarm is definite-time undervoltage protection fixedly, the phase undervoltage protection for tripping can be configured as inverse-time undervoltage protection (IDMT) or definite-time undervoltage protection by the setting [Y.27P.Opt_Curve] (0: definite-time characteristic, 1: inverse-time characteristic). PCS-985TI Transformer Relay 3-83 Date: 2015-05-15...
Page 132: Operation Principle
[Y.27P.TMS]. 3.10.3.3 Auxiliary Criterion Undervoltage protection can be blocked by the normally open auxiliary contact of the circuit breaker [Flg_52a]. If [Flg_52a] is “0”, undervoltage protection is blocked. Besides, the normally 3-84 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 133: Logic
500ms Y.27P.FD [Y.27P.Op] Figure 3.10-1 Logic diagram of undervoltage protection Where: Y.27P.FD is the internal signal to indicate that tripping stage of undervoltage protection picks up (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-85 Date: 2015-05-15...
Page 134: Inputs And Outputs
Phase undervoltage protection tripping stage operates. Y.27PAlm.Alm Phase undervoltage protection alarm stage operates to issue alarm signal. Start signals Y.27P.St Phase undervoltage protection tripping stage starts. Y.27PAlm.St Phase undervoltage protection alarm stage starts. Waveform recording 3-86 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 135: Settings
0: disable Logic setting enabling/disabling phase Y.27PAlm.En 1: enable undervoltage protection alarm stage. Voltage setting of phase undervoltage protection Y.27PAlm.Upp_Set 0.10~120.00 0.01 alarm stage. Time delay of phase undervoltage protection Y.27PAlm.t_Op 0~30 0.01 alarm stage. PCS-985TI Transformer Relay 3-87 Date: 2015-05-15...
Page 136: Residual Overvoltage Protection (59G)
(IDMT) or definite-time residual overvoltage protection by the setting [Y.59G.Opt_Curve] (0: definite-time characteristic, 1: inverse-time characteristic).  The VT broken-delta residual voltage or the calculated residual voltage can be selected for the calculation of residual overvoltage protection. 3.11.3 Protection Principle 3-88 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 137: Logic
(1) Logic setting [Z.En] (Z=Y.59GAlm or Y.59G)is set as “1”. (2) The protection function enabling inputs [Z.En1], [Z.En2] are “1”. (3) The protection function blocking input [Z.Blk] is “0”. PCS-985TI Transformer Relay 3-89 Date: 2015-05-15...
Page 138: Inputs And Outputs
Three-phase voltage data (Z=Y .59GAlm or Y .59G). Single phase voltage data, i.e. VT broken-delta residual voltage (Z=Y.59GAlm Z.U1P or Y.59G). Z.En1 Protection function enabling input1 and input 2, it can be binary inputs or 3-90 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 139: Settings
Main menu -> Measurements -> Measurements2-> Prot Status->Tr LVS Bak Prot Values Main menu -> Measurements -> Measurements2-> Prot Status->ST1 Bak Prot Values Main menu -> Measurements -> Measurements2-> Prot Status->ST2 Bak Prot Values 3.11.6 Settings PCS-985TI Transformer Relay 3-91 Date: 2015-05-15...
Page 140 0, 1 protection. 0: VT broken-delta residual voltage 1: Calculated residual current Access path: Settings-> Prot Settings -> TrHVS EF Settings Settings-> Prot Settings -> TrMVS EF Settings Settings-> Prot Settings -> TrLVS EF Settings 3-92 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 141: Overfrequency Protection (81O)
3.12.3.2 Fault Detector The positive voltage is used to calculate the system frequency, after a filtering process, the measurement of system frequency will not be affected by the harmonic component. PCS-985TI Transformer Relay 3-93 Date: 2015-05-15...
Page 142: Logic
If overfrequency protection is disabled, all the related output signals will be reset. If no external input is configured to [81O.En1] ([81O.En2]), the default initial value of [81O.En1] ([81O.En2]) is “1”; if no external input is configured to [81O.Blk], the default initial value of [81O.Blk] is “0”. 3-94 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 143 81O.FD Figure 3.12-2 Logic diagram of stage 1 of overfrequency band accumulate protection The stage 2 and stage 3 of overfrequency band accumulate protection are similar to stage 1 of overfrequency band accumulate protection. PCS-985TI Transformer Relay 3-95 Date: 2015-05-15...
Page 144: Inputs And Outputs
3.12.5 Inputs and Outputs 81O.St 81O.En1 81O.OF1.Op 81O.En2 81O.OF2.Op 81O.Blk 81O.OF3.Op 81O.Flg_OnLoad 81O.OF4.Op 81O.OF1.Op_Accu Flg_52a 81O.OF2.Op_Accu 81O.OF3.Op_Accu 81O.OF4.Op_Accu 81O.OF1.Alm 81O.OF2.Alm 81O.OF3.Alm 81O.OF4.Alm 81O.OF1.Alm_Accu 81O.OF2.Alm_Accu 81O.OF3.Alm_Accu 81O.OF4.Alm_Accu Figure 3.12-4 Function block diagram of overfrequency protection 3-96 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 145 Stage 3 of overfrequency protection operates to trip. 81O.OF4.Op Stage 4 of overfrequency protection operates to trip. 81O.OF1.Op_Accu Stage 1 of overfrequency band accumulate protection operates to trip. 81O.OF2.Op_Accu Stage 2 of overfrequency band accumulate protection operates to trip. PCS-985TI Transformer Relay 3-97 Date: 2015-05-15...
Page 146 The accumulate duration of stage 1 of overfrequency protection 81O.OF2.Dur_Accu The accumulate duration of stage 2 of overfrequency protection 81O.OF3.Dur_Accu The accumulate duration of stage 3 of overfrequency protection 81O.OF4.Dur_Accu The accumulate duration of stage 4 of overfrequency protection Access Path: 3-98 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 147: Settings
Time delay of stage 4 of overfrequency band 81O.OF4.t_ Accu 0.10~300.00 0.01 accumulate protection. Time delay of stage 4 of overfrequency 81O.OF4.t_Op 0.10~300.00 0.01 protection. 81O.OF4.OutMap 0~3FFFFFFF Tripping logic setting of stage 4 of PCS-985TI Transformer Relay 3-99 Date: 2015-05-15...
Page 148 Logic setting of enabling/disabling stage 4 of 0: disable 81O.OF4.En_Alm overfrequency protection operates to issue 1: enable alarm signal. 0: disable Logic setting of enabling/disabling stage 4 of 81O.OF4.En_Trp 1: enable overfrequency protection operates to trip. 3-100 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 149: Underfrequency Protection (81U)
PCS-985TI Transformer Relay 3-101 Date: 2015-05-15...
Page 150 If underfrequency protection is disabled, all the related output signals will be reset. If no external input is configured to [81U.En1] ([81U.En2]), the default initial value of [81U.En1] ([81U.En2]) is “1”; if no external input is configured to [81U.Blk], the default initial value of [81U.Blk] is “0”. 3-102 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 151 81U.FD Figure 3.13-2 Logic diagram of stage 1 of underfrequency band accumulate protection The stage 2 and stage 3 of underfrequency band accumulate protection are similar to stage 1 of underfrequency band accumulate protection. PCS-985TI Transformer Relay 3-103 Date: 2015-05-15...
Page 152 3.13.5 Inputs and Outputs 81U.St 81U.En1 81U.UF1.Op 81U.En2 81U.UF2.Op 81U.Blk 81U.UF3.Op 81U.UF4.Op 81U.Flg_OnLoad 81U.UF1.Op_Accu Flg_52a 81U.UF2.Op_Accu 81U.UF3.Op_Accu 81U.UF4.Op_Accu 81U.UF1.Alm 81U.UF2.Alm 81U.UF3.Alm 81U.UF4.Alm 81U.UF1.Alm_Accu 81U.UF2.Alm_Accu 81U.UF3.Alm_Accu 81U.UF4.Alm_Accu Figure 3.13-4 Function block diagram of underfrequency protection 3-104 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 153 Table 3.13-3 Output signals of underfrequency protection (e vent recorder) Signal Description Tripping reports 81U.UF1.Op Stage 1 of underfrequency protection operates to trip. 81U.UF2.Op Stage 2 of underfrequency protection operates to trip. 81U.UF3.Op Stage 3 of underfrequency protection operates to trip. PCS-985TI Transformer Relay 3-105 Date: 2015-05-15...
Page 154 Stage 4 of underfrequency band accumulate protection starts. Table 3.13-4 Output signals of underfrequency protection (measurements) Signal Description Unit 81U.UF1.Dur_Accu The accumulate duration of stage 1 of underfrequency protection 81U.UF2.Dur_Accu The accumulate duration of stage 2 of underfrequency protection 3-106 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 155 Tripping logic setting of stage 3 of 81U.UF3.OutMap 0~3FFFFFFF underfrequency protection. Frequency setting of stage 4 of underfrequency 81U.UF4.f_Set 45.00~61.00 0.01 protection. Time delay of stage 4 of underfrequency band 81U.UF4.t_Accu 0.10~300.00 0.01 accumulate protection. PCS-985TI Transformer Relay 3-107 Date: 2015-05-15...
Page 156 Logic setting of enabling/disabling stage 3 of 0: disable 81U.UF3.En_Trp_Accu underfrequency band accumulate protection 1: enable operates to trip. Logic setting of enabling/disabling stage 4 of 0: disable 81U.UF4.En_Alm underfrequency protection operates to issue 1: enable alarm signal. 3-108 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 157: Rate-Of-Frequency-Change Protection (81R)
The time period is configurable (the default value is 5 cycles), within which the frequency change can be got. The ratio between the frequency change and the time period is the corresponding rate-of-frequency-change. It can be a PCS-985TI Transformer Relay 3-109 Date: 2015-05-15...
Page 158: Logic
3.14.4 Logic For rate-of-frequency-change protection, when following three conditions are met, the rate-of-frequency-change protection is enabled. (1) Logic setting [81R.En] is set as “1”. (2) The protection function enabling inputs [81R.En1], [81R.En2] are “1”. 3-110 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 159 Figure 3.14-1 Logic diagram of rate-of-frequency-change protection Where: is system frequency. is the calculated system rate-of-frequency-change. 81R.FD is the operation flag of the fault detector of rate-of-frequency-change protection (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-111 Date: 2015-05-15...
Page 160: Input And Output
Above input and output signals can be used for programmable logic, and following output signals are only for LCD display and waveform recording function of the device. Table 3.14-3 Output signals of rate-of-frequency-change protection (e vent recorder) Signal Description Tripping reports 3-112 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 161: Settings
1: Decrease The rate-of-frequency-change setting of stage 1 of 81R.RF1.df/dt_Set 0.10~20 0.01 Hz/s rate-of-frequency-change protection. Time delay of stage 1 of rate-of-frequency-change 81R.RF1.t_Op 0.10~100.00 0.01 protection. Tripping logic setting stage 81R.RF1.OutMap 0~3xFFFFFFF rate-of-frequency-change protection. PCS-985TI Transformer Relay 3-113 Date: 2015-05-15...
Page 162 1: enable alarm. Logic setting of enabling/disabling stage 1 of 0: disable 81R.RF1.En_Trp rate-of-frequency-change protection operates to 1: enable trip. 81R.RF2.En_Alm 0: disable Logic setting of enabling/disabling stage 2 of 3-114 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 163: Thermal Overload Protection (49)
IEC 60255-8 standard, transformer load current is used to calculate the thermal accumulation. 3.15.2 Function Thermal overload protection has following functions:  Thermal overload protection can operate to trip or alarm (with independent setting and logic PCS-985TI Transformer Relay 3-115 Date: 2015-05-15...
Page 164: Operation Principle
One binary input signal can be used to clear the thermal accumulation. 3.15.4 Logic For thermal overload protection, when following three conditions are met, the thermal overload protection is enabled. 3-116 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 165: Input And Output
Table 3.15-1 Input signals of thermal overload protection Signal Description Y.49.I3P Three-phase current input. Y.49.Clear Input signal to clear the thermal accumulation. Y.49.En1 Protection function enabling input1 and input 2, it can be binary inputs or settings, such PCS-985TI Transformer Relay 3-117 Date: 2015-05-15...
Page 166: Settings
Main menu -> Measurements -> Measurements2-> Prot Status->Tr MVS PPF Prot Values 3.15.6 Settings Table 3.15-5 Settings list of thermal overload protection Setting Item Range Step Unit Description Logic setting enabling/disabling thermal Y.49.En overload protection. Base current setting thermal overload Y.49.Ib_Set 0.05-20In 0.01 protection. 3-118 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 167: Impedance Protection (21)
Two stage phase-to-phase impedance protection elements with respective impedance setting, time delay setting and logic setting.  Two stage phase-to-earth impedance protection elements with respective impedance setting, time delay setting and logic setting.  Power swing blocking releasing function. PCS-985TI Transformer Relay 3-119 Date: 2015-05-15...
Page 168: Protection Principle
If VT and CT are connected as following figure, i.e. the positive polarity of CT is at busbar side, points to the protected object, then the setting [Y.21Mx.ZP.Opt_Dir] and [Y.21Mx.ZG.Opt_Dir] should be set as “1”. Otherwise [Y.21Mx.ZP.Opt_Dir] and [Y.21Mx.ZG.Opt_Dir] should be set as “0”. 3-120 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 169  U IZ  Figure 3.16-2 Operating characteristic of phase-to-phase impedance relay The operation criterion of phase-to-phase impedance relay is as follows.        Equation 3.16-3    PCS-985TI Transformer Relay 3-121 Date: 2015-05-15...
Page 170 The operation criterion of phase-to-earth impedance relay is as follows.           Equation 3.16-4         Where: is phase-to-earth voltage vector.  3-122 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 171 BLOCKED. 3.16.3.6 Power Swing Blocking Releasing (PSBR) PCS-985TI adopts power swing blocking releasing to avoid mal-operation of impedance protection due to power swing. The protection is blocked all along under the normal condition and power swing.
Page 172 The criterion of SF PSBR element comprises the following two parts:    When , the SF PSBR element will operate with a time delay 150ms.    When , the SF PSBR element will operate with a time delay 3-124 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 173: Logic
Flg_Pkp_SFPSBR is the internal flag indicating that symmetrical fault PSBR element picks up. Flg_Pkp_FDPSBR is the internal flag indicating that fault detector PSBR element picks up. Tr_HVS.21M1.FD is the operation flag of the fault detector of DPFC phase-to-phase current or PCS-985TI Transformer Relay 3-125 Date: 2015-05-15...
Page 174: Inputs And Outputs
LCD display and waveform recording function of the device. Table 3.16-3 Output signals of impedance protection (e vent recorder) Signal Description Tripping reports Y.21M1.ZP.Op Stage 1 of phase-to-phase impedance protection operates. 3-126 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 175 Phase angle between phase-BC voltage and phase-BC current Y.21Mx.Ang(Uca-Ica) Phase angle between phase-CA voltage and phase-CA current Y.21Mx.Ang(Ua-Ia) Phase angle between phase-A voltage and phase-A current Y.21Mx.Ang(Ub-Ib) Phase angle between phase-B voltage and phase-B current PCS-985TI Transformer Relay 3-127 Date: 2015-05-15...
Page 176: Settings
Y.21Mx.ZG.Opt_Dir 0: system 1: transformer Forward impedance setting of stage x of Y.21Mx.ZG.Z_Fwd 0.05~200 0.01 phase-to-earth impedance protection Reverse impedance setting of stage x of Y.21Mx.ZG.Z_Rev 0.05~200 0.01 phase-to-earth impedance protection 3-128 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 177: Breaker Failure Protection (50Bf)
The internal logic between above two criteria can be “And” or “Or”. If the setting [Y.50BF.Opt_Mode] is set as “0”, the internal logic between current criterion and circuit breaker auxiliary contact criterion is “Or”; if the setting [Y.50BF.Opt_Mode] is set as “1”, the internal logic PCS-985TI Transformer Relay 3-129 Date: 2015-05-15...
Page 178: Protection Principle
I2 is the calculated negative-sequence current. [Y.50BF.I2_Set] is negative-sequence current setting of breaker failure protection. Residual current criterion: 3I0> [Y.50BF.3I0_Set] Equation 3.17-3 Where: 3I0 is the calculated residual current. [Y.50BF.3I0_Set] is residual current setting of breaker failure protection. 3-130 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 179: Logic
[BI_52b] is the normally closed auxiliary contact of the circuit breaker. I2 is the negative-sequence current. 3I0 is the calculated residual current. 50BF.FD is the operation flag of the fault detector of breaker failure protection (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-131 Date: 2015-05-15...
Page 180: Input And Output
Breaker failure protection with time delay 1 operates. Y.50BF.Op_t2 Breaker failure protection with time delay 2 operates. Start signals Y.50BF.St Breaker failure protection starts. Waveform recording Y.50BF.TrigDFR Breaker failure protection operates to trigger waveform recording. 3-132 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 181: Settings
In Section 3.18, the prefix “Y” in settings (such as [Y.62PD.I2_Set]) and input/output signals (such as [Y.62PD.Op]) can be Tr_HVS and Tr_MVS. Details of the prefix are as: Tr_HVS.62PD Corresponds to pole disagreement protection of main transformer high voltage side. PCS-985TI Transformer Relay 3-133 Date: 2015-05-15...
Page 182: Application
3I0 >[Y.62PD.3I0_Set] Equation 3.18-1 Where: 3I0 is the calculated residual current of some side. [Y.62PD.3I0_Set] is residual current setting of pole disagreement protection of some side. Negative-sequence current criterion: > [Y.62PD.I2_Set] Equation 3.18-2 Where: 3-134 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 183 3I0 is the calculated residual current of some side. I2 is negative-sequence current of some side. Y.62PD.FD is the operation flag of the fault detector of pole disagreement protection (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-135 Date: 2015-05-15...
Page 184 Tripping reports Y.62PD.Op Pole disagreement protection operates. Start signals Y.62PD.St Pole disagreement protection starts. Alarm signals Y.62PD.Alm Pole disagreement position contact abnormality alarm Waveform recording Y.62PD.TrigDFR Pole disagreement protection operates to trigger waveform recording. 3-136 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 185 If the device detect the PCS-985TI Transformer Relay 3-137 Date: 2015-05-15...
Page 186 [Y.50F.Alm] will also be issued. 3.19.3.3 Current Criteria Current criteria include negative-sequence current criterion, residual current criterion, and phase current criterion. If any current criterion is met, current element of breaker flashover protection picks up. Negative-sequence current criterion: 3-138 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 187 [Y.50F.En1] ([Y.50F.En2]), the default initial value of [Y.50F.En1] ([Y.50F.En2]) is “1”; if no external input is configured to [Y.50F.Blk], the default initial value of [Y.50F.Blk] is “0”. Logics of breaker flashover protection (with two time delays) is shown in following figure. PCS-985TI Transformer Relay 3-139 Date: 2015-05-15...
Page 188 [BI_52b] is the normally closed auxiliary contact of the circuit breaker. [BI_52a] is the normally open auxiliary contact of the circuit breaker. Y.50F.FD is the operation flag of the fault detector of breake r flashover protection (the fault detector of fault detector DSP module). 3-140 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 189 Breaker flashover protection with time delay 2 operates. Start signals Y.50F.St Breaker flashover protection starts. Alarm signals Y.50F.Alm Breaker flashover protection circuit breaker contact abnormality alarm. Waveform recording Y.50F.TrigDFR Breaker flashover protection operates to trigger waveform recording. PCS-985TI Transformer Relay 3-141 Date: 2015-05-15...
Page 190 3.20 Step-down Transformer HV Side Phase Overcurrent Protection (50/51P) NOTICE! In Section 3.20, the prefix “Y” in settings (such as [Y.50/51P1.I_Set]) and input/output signals (such as [Y.50/51P1.Op]) can be ST1_HVS and ST2_HVS. Details of the prefix are as: 3-142 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 191: Function Description
Voltage controlled element: step-down transformer HV side phase overcurrent protection is controlled by the voltage controlled element of step-down transformer LV side. 3.20.3.2 Current Element The operation criterion of each stage of step-down transformer phase overcurrent protection is: > [Y.50/51Px.I_Set] Equation 3.20-1 Where: PCS-985TI Transformer Relay 3-143 Date: 2015-05-15...
Page 192 Table 3.20-1 Inverse-time curve parameters of stage 3 of step-down transformer HV side phase overcurrent protection α Y.50/51P3.Opt_Cur ve Time Characteristic Definite time IEC Normal inverse 0.14 0.02 IEC Very inverse 13.5 IEC Extremely inverse 80.0 3-144 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 193 For stage x of step-down transformer HV side phase overcurrent protection, if following three conditions are met, stage x of phase overcurrent protection is enabled. (1) Logic setting [Y.50/51Px.En] is set as “1”. (2) The protection function enabling inputs [Y.50/51Px.En1], [Y.50/51Px.En2] are “1” PCS-985TI Transformer Relay 3-145 Date: 2015-05-15...
Page 194: Inputs And Outputs
Protection function enabling input1 and input 2, it can be binary inputs or settings, such Y.50/51Px.En2 as function enabling binary inputs, logic links, etc. Y.50/51Px.Blk Protection function blocking input, such as function blocking binary input. 3-146 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 195 Inverse-time accumulate value of phase A of stage 3 of Y.50/51P3.Accu_A phase overcurrent protection. Inverse-time accumulate value of phase B of stage 3 of Y.50/51P3.Accu_B phase overcurrent protection. Inverse-time accumulate value of phase C of stage 3 of Y.50/51P3.Accu_C phase overcurrent protection. PCS-985TI Transformer Relay 3-147 Date: 2015-05-15...
Page 196 Y.50/51P3.K_I_Max 10~40 0.01 to the pickup setting of stage 3 of phase overcurrent protection. base current transformer Y.50/51P3.Ib_Set 0.10~4.00In 0.01 inverse-time overcurrent protection. Y.50/51P3.TMS 0.05~10.00 0.01 Time factor setting of stage 3 of phase 3-148 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 197 ST2_Br2.50/51P step-down transformer 2. 3.21.1 Application When a fault occurs in power system, the current increases and phase overcurrent protection operates to avoid damages to protected equipment. Voltage controlled element can be selected to PCS-985TI Transformer Relay 3-149 Date: 2015-05-15...
Page 198 1.1 times of base current of inverse-time overcurrent protection. If any phase current of LV side is larger than the current setting of any enabled stage of phase 3-150 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 199 Definite time IEC Normal inverse 0.14 0.02 IEC Very inverse 13.5 IEC Extremely inverse 80.0 IEC Short-time inverse 0.05 0.04 IEC Long-time inverse 120.0 ANSI Extremely inverse 28.2 0.1217 ANSI Very inverse 19.61 0.491 PCS-985TI Transformer Relay 3-151 Date: 2015-05-15...
Page 200 [Y.50/51P.Upp_VCE] is the phase-to-phase undervoltage setting. [Y.50/51P.U2_VCE] is the negative-sequence overvoltage setting. Voltage of corresponding branch can be configured as the input of voltage controlled element through PCS-Explorer.  Effect of VT Circuit 3-152 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 201 [Y.50/51P.I3P] is the three-phase current input. Y.50/51Px.FD is the internal signal indicating that stage x of step-down transformer LV side phase overcurrent protection picks up (the fault detector of fault detector DSP module). PCS-985TI Transformer Relay 3-153 Date: 2015-05-15...
Page 202 Stage 1 of phase overcurrent protection starts. Y.50/51P2.St Stage 2 of phase overcurrent protection starts. Waveform recording Stage 1 of phase overcurrent protection operates to trigger waveform Y.50/51P1.TrigDFR recording. Y.50/51P2.TrigDFR Stage 2 of phase overcurrent protection operates to trigger waveform 3-154 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 203 0~3000 0.01 protection. Tripping logic setting of stage 1 of phase Y.50/51P1.OutMap 0~3FFFFFFF overcurrent protection. Logic setting of enabling/disabling voltage 0: disable Y.50/51P1.En_VCE controlled element of stage 1 of phase 1: enable overcurrent protection. PCS-985TI Transformer Relay 3-155 Date: 2015-05-15...
Page 204 3.22 Step-down Transformer LV Side Ground Overcurrent Protection (50/51G) NOTICE! In Section 3.21, the prefix “Y” in settings (such as [Y.50/51G1.3I0_Set]) and input/output signals (such as [Y.50/51G1.Op]) can be ST1_Br1, ST1_Br2, ST2_Br1 and ST2_br2. 3-156 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 205 Residual voltage controlled element: one residual voltage controlled element shared by all ground overcurrent elements.. 3.22.3.2 Residual Current Element The operation criterion of each stage of ground overcurrent protection is: 3I >[Y.50/51Gx.3I0_Set] Equation 3.22-1 Where: PCS-985TI Transformer Relay 3-157 Date: 2015-05-15...
Page 206 Table 3.22-1 Inverse-time curve parameters of stage 2 of step-down transformer LV side ground overcurrent protection α Y.50/51G2.Opt_Curve Time Characteristic Definite time IEC Normal inverse 0.14 0.02 IEC Very inverse 13.5 IEC Extremely inverse 80.0 IEC Short-time inverse 0.05 0.04 3-158 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 207 If no external input is configured to [Y.50/51Gx.En1] ([Y.50/51Gx.En2]), the default initial value of [Y.50/51Gx.En1] ([Y.50/51Gx.En2]) is “1”; if no external input is configured to [Y.50/51Gx.Blk], the default initial value of [Y.50/51Gx.Blk] is “0”. PCS-985TI Transformer Relay 3-159 Date: 2015-05-15...
Page 208 Protection function blocking input, such as function blocking binary input. Table 3.22-3 Output signals of step-down transformer LV side ground overcurrent protection Signal Description Y.50/51G1.Op Stage 1 of ground overcurrent protection operates. Y.50/51G2.Op Stage 2 of ground overcurrent protection operates. 3-160 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 209 Current setting of stage 1 of ground Y.50/51G1.I_Set 0.05~20.00In 0.01 overcurrent protection. Time delay of stage ground Y.50/51G1.t_Op 0~3000 0.01 overcurrent protection. Y.50/51G1.OutMap 0~3FFFFFFF Tripping logic setting of stage 1 of ground PCS-985TI Transformer Relay 3-161 Date: 2015-05-15...
Page 210 2 of 1: enable ground overcurrent protection. Logic setting to select the current that adopted by stage 2 of ground overcurrent Y.50/51G2.Opt_3I0 0, 1 protection 0: Measured residual current 1: Calculated residual current 3-162 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 211 If mechanical protection is disabled, all the related output signals will be reset. If no external input is configured to [MRx.En1] ([MRx.En2]), the default initial value of [MRx.En1] ([MRx.En2]) is “1”; if no external input is configured to [MRx.Blk], the default initial value of [MRx.Blk] is “0”. PCS-985TI Transformer Relay 3-163 Date: 2015-05-15...
Page 212 Table 3.23-2 Output signals of mechanical protection (x=1, 2) Signal Description MR x.St Mechanical protection x starts MR x.Sig1 Output alarm signal of channel 1 of mechanical protection x. MR x.Sig2 Output alarm signal of channel 2 of mechanical protection x. 3-164 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 213 Setting Item Range Step Unit Description 0: disable Logic setting of enabling/disabling mechanical MR1.En 1: enable protection 1. Delay pickup time of tripping command of channel MR1.t_DPU_1 0.00~6000.00 0.01 1 of mechanical protection 1. PCS-985TI Transformer Relay 3-165 Date: 2015-05-15...
Page 214 0.00~6000.00 0.01 3 of mechanical protection 2. Tripping logic setting of channel 3 of mechanical MR2.OutMap_3 0~3FFFFFFF protection 2. 0: disable Logic setting of enabling/disabling channel 3 of MR2.En_3 1: enable mechanical protection 2. 3-166 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 215 CT at the outlet of main transformer MV side circuit breaker should be input. If the setting [Num_CB_MVS_Tr] is set as “2”, it means there are two circuit PCS-985TI Transformer Relay 3-167 Date: 2015-05-15...
Page 216 [Alm_52_CB1] Imax1>0.10In BI_52b_CB2 & [Alm_52_CB2] Imax2>0.10In BI_52b_CB3 & [Alm_52_CB3] Imax3>0.10In BI_52b_CB4 & [Alm_52_CB4] Imax4>0.10In Figure 3.24-1 Logic diagram of interconnection status element Where: Imax1 is the maximum phase current value of three-phase current 1. 3-168 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 217 Circuit breaker 4 auxiliary contact abnormality alarm. Above input and output signals can be used for programmable logic, and following output signals are only for LCD display and waveform recording function of the device. PCS-985TI Transformer Relay 3-169 Date: 2015-05-15...
Page 218 The CT ratio of the several branches can be different, the CT ratio of the first channel of current is taken as the referenced CT ratio, the currents of other channel(s) will be converted to the first channel firstly, and then the current sum is calculated. 3.25.4 Logic 3-170 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 219 A flag indicating load current of x side is detected Above input and output signals can be used for programmable logic, and following output signals are only for LCD display and waveform recording function of the device. PCS-985TI Transformer Relay 3-171 Date: 2015-05-15...
Page 220 “0”). NOTICE! The settings in above table CAN NOT be seen on LCD of equipment. These settings are usually configured by field commission engineer according to the design drawing and project requirement. 3-172 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 221 3.26.2 Function Description Three-phase current element has following functions:  Pre-process three phase currents.  Calculate information related to three-phase current.  Monitor the secondary circuit of current including CT circuit abnormality. 3.26.3 Principle PCS-985TI Transformer Relay 3-173 Date: 2015-05-15...
Page 222 Figure 3.26-2 Function block diagram of three-phase current element Table 3.26-1 Input signals of three-phase current element Signal Description Sampled value of phase-A current Y.ia Sampled value of phase-B current Y.ib Sampled value of phase-C current Y.ic 3-174 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 223 Tr_MVS.Ib Phase current amplitude of CT of main transformer MV side Tr_MVS.Ic Positive-sequence current amplitude of CT of main transformer MV side Tr_MVS.I1 Negative-sequence current amplitude of CT of main transformer MV side Tr_MVS.I2 PCS-985TI Transformer Relay 3-175 Date: 2015-05-15...
Page 224 Main menu -> Measurements -> Measurements2-> ST1 Values-> ST1 HVS Values ST2_HVS#.Ia Phase current amplitude of the big-ratio CT of HV side of step-down ST2_HVS#.Ib transformer 2 ST2_HVS#.Ic ST2_HVS#.I1 Positive-sequence current amplitude of the big-ratio CT of HV side of 3-176 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 225 ST1_Br2.I2 step-down transformer 1 The calculated residual current amplitude of CT of LV side branch 2 of ST1_Br2.3I0_Cal step-down transformer 1 Access path: Main menu -> Measurements -> Measurements1-> ST1 Values-> ST1 Br Values PCS-985TI Transformer Relay 3-177 Date: 2015-05-15...
Page 226 Tr_HVS2.Ang(Ic-Ia) of main transformer Phase angle between phase-A current and phase-B current of MV side of Tr_MVS.Ang(Ia-Ib) main transformer Phase angle between phase-B current and phase-C current of MV side of Tr_MVS.Ang(Ib-Ic) main transformer 3-178 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 227 Phase angle between phase-C current and phase-A current of HV side of ST2_HVS.Ang(Ic-Ia) step-down transformer 2 Phase angle between phase-A current and phase-B current of LV side ST2_Br1.Ang(Ia-Ib) branch 1 of step-down transformer 2 PCS-985TI Transformer Relay 3-179 Date: 2015-05-15...
Page 228 LV side branch 2 of step-down transformer 1 ST2_Br1 corresponds to the three-phase voltage of LV side branch 1 of step-down transformer 2 ST2_Br2 corresponds to the three-phase voltage of LV side branch 2 of step-down transformer 2 3-180 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 229 Positive sequence voltage is larger than 48V. The third harmonic of calculated residual voltage (3U0_3ω) is larger than K*U1. K is the VT neutral line failure judge coefficient [Y.K_VTNS], it takes 0.2~0.5 generally. 3.27.4 Logic PCS-985TI Transformer Relay 3-181 Date: 2015-05-15...
Page 230 Sampled value of Phase C voltage Y.Flg_OnLoad A flag indicating that load current is detected Table 3.27-2 Output signals of three-phase voltage element Signal Description Y.U3P Three-phase voltage data set. Phase-A voltage. Y.Ua Phase-B voltage. Y.Ub Phase-C voltage. Y.Uc 3-182 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 231 The calculated residual voltage amplitude of VT of main transformer Tr_MVS.3U0_Cal MV side Tr_MVS.Uab Phase-to-phase voltage amplitude of the VT of MV side of main Tr_MVS.Ubc transformer Tr_MVS.Uca Tr_LVS.Ua Phase voltage amplitude of VT of main transformer LV side PCS-985TI Transformer Relay 3-183 Date: 2015-05-15...
Page 232 Negative-sequence voltage amplitude of LV side branch 2 of ST1_Br2.U2 step-down transformer 1 The calculated residual voltage amplitude of LV side branch 2 of ST1_Br2.3U0_Cal step-down transformer 1 ST1_Br2.Uab Phase-to-phase voltage amplitude of LV side branch 2 of step-down transformer 1 ST1_Br2.Ubc 3-184 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 233 Phase angle between phase-B voltage and phase-C voltage of HV Tr_HVS.Ang(Ub-Uc) side of main transformer Phase angle between phase-C voltage and phase-A voltage of HV Tr_HVS.Ang(Uc-Ua) side of main transformer PCS-985TI Transformer Relay 3-185 Date: 2015-05-15...
Page 234 Phase angle between phase-A voltage and phase-B voltage of LV side ST2_Br2.Ang(Ua-Ub) branch 2 of step-down transformer 2 Phase angle between phase-B voltage and phase-C voltage of LV side ST2_Br2.Ang(Ub-Uc) branch 2 of step-down transformer 2 3-186 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 235 Residual current element is responsible for pre-processing measured residual current and calculating the amplitude and the phase angle of residual current, etc. All calculated information of residual current element is for the protection logic calculation. PCS-985TI Transformer Relay 3-187 Date: 2015-05-15...
Page 236 Main menu -> Measurements -> Measurements2-> ST1 Values-> ST1 Br Values The external measured residual current amplitude of LV side branch 1 of ST2_Br1.3I0_Ext step-down transformer 2 The external measured residual current amplitude of LV side branch 2 of ST2_Br2.3I0_Ext step-down transformer 2 3-188 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 237 All calculated information of residual voltage element is for the protection logic calculation 3.29.2 Function Description  Pre-process measured residual voltage.  Calculate information related to residual voltage. 3.29.3 Inputs and Outputs PCS-985TI Transformer Relay 3-189 Date: 2015-05-15...
Page 238 The amplitude of VT broken-delta residual voltage of LV side branch 2 of ST2_Br2.3U0_Ext step-down transformer 2 Access path: Main menu -> Measurements -> Measurements1-> ST2 Values-> ST2 Br Values Main menu -> Measurements -> Measurements2-> ST2 Values-> ST2 Br Values 3-190 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 239 Primary rated voltage of corresponding VT. Y.U2n 1~300 0.01 Secondary rated voltage of corresponding VT. Secondary voltage value corresponding Y.U2n_Delt 1~300 0.01 broken-delta VT. Access path: Settings->Tr Sys Settings Settings->ST1 Sys Settings Settings->ST2 Sys Settings PCS-985TI Transformer Relay 3-191 Date: 2015-05-15...
Page 240 3 Operation Theory 3-192 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 241: List Of Tables
4.3.4 Memory Checking ......................4-13 4.3.5 Opto-coupler Power Supervision ..................4-13 4.3.6 Output Tripping Circuit Supervision ................4-13 4.3.7 Test Mode Supervision ....................4-14 4.3.8 Hardware Configuration Supervision ................4-14 List of Tables Table 4.2-1 Alarm description ....................4-1 Table 4.2-2 Troubleshooting....................4-8 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 242 4 Supervi sion PCS-985TI Transformer Relay Date: 2015-05-15...
Page 243 Table 4.2-1 Alarm description Blocking Item Description Device Fail Signals The device fails. Fail_Device This signal will be pick up if any fail signal picks up and it will Blocked drop off when all fail signals drop off. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 244 This signal will pick up with a time delay of 50ms and will be Blocked latched unless the recommended handling suggestion is adopted. FDBrd.Fail_HTM The HTM bus for data exchange is abnormal (fault detector Blocked PCS-985TI Transformer Relay Date: 2015-05-15...
Page 245 The power supply of BI plug-in module in slot 05 is abnormal. B05.Alm_OptoDC This signal will pick up with a time delay of 10s and will drop off Unblocked with a time delay of 10s. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 246 Tr_HVS.Alm_VTS Main transformer HV side VT secondary circuit failure alarm. Unblocked Tr_MVS.Alm_VTS Main transformer MV side VT secondary circuit failure alarm. Unblocked Tr_LVS.Alm_VTS Main transformer LV side VT secondary circuit failure alarm. Unblocked PCS-985TI Transformer Relay Date: 2015-05-15...
Page 247 Alarm message indicating residual differential current of MV Tr_MVS.64REF.Alm_Diff Unblocked side of main transformer is abnormal. Alarm message indicating residual differential current of LV ST1_Br1.64REF.Alm_Diff Unblocked side branch 1 of step-down transformer 1 is abnormal. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 248 Stage 3 of overfrequency band accumulate protection 81O.OF3.Alm_Accu Unblocked operates to issue alarm signal. Stage 4 of overfrequency band accumulate protection 81O.OF4.Alm_Accu Unblocked operates to issue alarm signal. Stage 1 of rate-of-frequency-change protection operates to 81R.RF1.Alm Unblocked alarm. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 249 MV side operates to issue alarm signal. Residual overvoltage protection alarm stage of main Tr_MVS.59GAlm.Alm Unblocked transformer MV side operates to issue alarm signal. Phase undervoltage protection alarm stage main Tr_MVS.27PAlm.Alm Unblocked transformer MV side operates to issue alarm signal. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 250 Please reset setting values according to the range described in the Fail_Setting_OvRange instruction manual, then re-power or reboot the device and the device will restore to normal operation state. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 251 Alm_BI_SettingGrp Please check the value of setting [Acti ve_Grp] and binary input of indiating PCS-985TI Transformer Relay Date: 2015-05-15...
Page 252 Protection Element Alarm Signals Tr_HVS1.AlmL_CTS Tr_HVS2.AlmL_CTS Tr_MVS.AlmL_CTS Tr_LVS.AlmL_CTS ST1_HVS#.AlmL_CTS Please check the corresponding CT secondary circuit. After the abnormality is eliminated, the device returns to normal operation state. ST1_HVS.AlmL_CTS ST1_Br1.AlmL_CTS ST1_Br2.AlmL_CTS ST2_HVS#.AlmL_CTS ST2_HVS.AlmL_CTS 4-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 253 Alm_52_CB4 Tr.87T.Alm_Diff Tr.87T.Alm_CTS ST1.87T.Alm_Diff ST1.87T.Alm_CTS ST2.87T.Alm_Diff ST2.87T.Alm_CTS Tr_HVS.64REF.Alm_Diff Tr_MVS.64REF.Alm_Diff ST1_Br1.64REF.Alm_Diff ST1_Br2.64REF.Alm_Diff ST2_Br1.64REF.Alm_Diff Please check the logic of corresponding protection element in Chapter 3. ST2_Br2.64REF.Alm_Diff 24.Alm 81U.UF1.Alm 81U.UF2.Alm 81U.UF3.Alm 81U.UF4.Alm 81U.UF1.Alm_Accu 81U.UF2.Alm_Accu 81U.UF3.Alm_Accu 81U.UF4.Alm_Accu 81O.OF1.Alm PCS-985TI Transformer Relay 4-11 Date: 2015-05-15...
Page 254 81R.RF2.Alm 81R.RF3.Alm 81R.RF4.Alm Tr_HVS.62PD.Alm Tr_HVS.50F.Alm Tr_HVS.51PAlm1.Alm Tr_HVS.51PAlm2.Alm Tr_HVS.51PAlm3.Alm Tr_HVS.49.Alm Tr_HVS.59PAlm.Alm Tr_HVS.59GAlm.Alm Tr_HVS.27PAlm.Alm Tr_MVS.62PD.Alm Tr_MVS.50F.Alm Tr_MVS.51PAlm1.Alm Tr_MVS.51PAlm2.Alm Tr_MVS.51PAlm3.Alm Tr_MVS.49.Alm Tr_MVS.59PAlm.Alm Tr_MVS.59GAlm.Alm Tr_MVS.27PAlm.Alm Tr_LVS.59GAlm.Alm ST1_HVS.51PAlm1.Alm ST1_HVS.51PAlm2.Alm ST1_HVS.51PAlm3.Alm ST1_Br1.59GAlm.Alm ST1_Br2.59GAlm.Alm ST2_HVS.51PAlm1.Alm ST2_HVS.51PAlm2.Alm ST2_HVS.51PAlm3.Alm ST2_Br1.59GAlm.Alm ST2_Br2.59GAlm.Alm MR1.Sig1 MR1.Sig2 4-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 255: Relay Self-Supervision
4.3.6 Output Tripping Circuit Supervision State of binary outputs on each BO module that located in slot No.x (No.x is the slot number) is continuously monitored. If any abnormality is detected on the module, the corresponding alarm PCS-985TI Transformer Relay 4-13 Date: 2015-05-15...
Page 256 4.3.8 Hardware Configuration Supervision Module configuration is checked automatically during equipment initialization, if plug-in module configuration is not consistent to the design drawing of an applied-specific, the alarm signal [Fail_BoardConfig] is issued with the equipment being blocked. 4-14 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 257 Table of Contents 5.1 Overview ........................5-1 5.2 Measurement ........................5-1 5.3 Event & Fault Records....................5-1 5.3.1 Introduction ........................5-1 5.3.2 Event Recording ......................5-2 5.3.3 Disturbance and Fault Recording ..................5-2 5.3.4 Present Recording ......................5-3 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 258 5 Management PCS-985TI Transformer Relay Date: 2015-05-15...
Page 259 Fault and disturbance recording  Present recording All the recorded information except for waveform can be viewed on local LCD or by printing. Waveform must be printed or be extracted using PCS-Explorer software and a waveform software. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 260: Event Recording
The time resolution is 1 ms using the relay internal clock. Initiating date and time is when a fault detector picks up. The relative time is the time when protection element operates to send tripping signal after fault detector picks up. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 261 Each time recording includes several-cycle pre-disturbance waveform (the waveform cycle number is configured via the communication setting [Num_Cyc_PreTrigDFR], the default value is 3-cycle) and 8-cycle after-disturbance waveform. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 262 5 Management PCS-985TI Transformer Relay Date: 2015-05-15...
Page 263 Figure 6.2-1 Typical wiring of PCS-985TI (part I) ..............6-4 Figure 6.2-2 Typical wiring of PCS-985TI (part II) ..............6-5 Figure 6.4-1 The module arrangement of PCS-985TI from rear view ........6-8 Figure 6.4-2 View of PWR plug-in module ................6-9 Figure 6.4-3 View of MON plug-in module ................
Page 264 Figure 6.4-17 Pin definition of AC analog output module ..........6-26 Figure 6.4-18 Default terminal definition of the first six NR1401 modules ......6-27 List of Tables Table 6.1-1 Module configuration PCS-985TI ................ 6-2 Table 6.4-1 Terminal definition and description of PWR plug-in module ......6-9 PCS-985TI Transformer Relay...
Page 265 AC current, AC voltage, DC current, and etc., and IO (input and output) module such as binary input, tripping output, signal output, and etc can be flexibly configured according to the remained slot positions. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 266 6 Hardware Description Table 6.1-1 Module configuration PCS-985TI Module description Remark NR1101/NR1102 Management and monitor module (MON module) Standard NR1151 Protection calculation and fault detector module (DSP module) Standard NR1503/NR1504 Binary input module (BI module) Standard NR1536 Mechanical signal input module (MR module)
Page 267 BO_FAIL BO_ALM BO_COM2 BO_FAIL BO_ALM OPTO+ OPTO- PWR+ PWR- NR1401 NR1401 NR1401 NR1401 NR1401 NR1401 NR1401 NR1410 DANGER DANGER DANGER DANGER DANGER DANGER DANGER Slot No. Figure 6.1-3 Typical rear view of the de vice PCS-985TI Transformer Relay Date: 2015-05-15...
Page 268: Typical Wiring
0519 0101 SYN+ 2223 2419 0102 SYN- BI_17 2222 0520 2420 3I0n 0103 SGND BI_18 0521 0104 2421 COM- 0105 0522 2422 0106 0107 SGND 2423 2424 Figure 6.2-1 Typical wiring of PCS-985TI (part I) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 269 1514 BO_Trip_17 1414 1515 1415 BO_Signal_29 1516 BO_Trip_18 1416 1517 1417 BO_Signal_30 1518 BO_Trip_19 1418 1519 1419 BO_Signal_31 1520 BO_Trip_20 1420 1521 1421 BO_Signal_32 1522 BO_Trip_21 1422 Figure 6.2-2 Typical wiring of PCS-985TI (part II) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 270 Required secondary limiting e.m.f (volts) Esl′ Esl′ = k×Ipcf ×Isn×(Rct+Rb)/Ipn stability factor = 2 Protective checking factor current (amps) Ipcf Same as the maximum prospective fault current Rated secondary current (amps) Current transformer secondary winding resistance (ohms) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 271 1301-1302 means terminal 01-02 of the module located in slot 13, i.e. 13 represents the slot position, 01(02) represents the pin number on the module. 6.4.1 Plug-in Module Arrangement The module arrangement of the device from rear view is shown in the following figure. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 272 NR1401 NR1410 Slot No. Figure 6.4-1 The module arrangement of PCS-985TI from rear view 6.4.2 PWR Module (Power Supply) PWR module is a DC/DC converter with electrical insulation between input and output. It has an input voltage range as described in Chapter 2. The standardized output voltages are +5V and +24V DC.
Page 273 The standard rated voltage of PWR module is self-adaptive to 88~300Vdc. If the input voltage is out of the range, an alarm signal (Fail_Device) will be issued. For non-standard rated voltage power supply module please specify when place order, and check whether the rated voltage of PCS-985TI Transformer Relay Date: 2015-05-15...
Page 274 RS-232 printing interface. Modules with various combinations of memory and interface are ava ilable as shown in the table below. NR1102G NR1102M NR1102N NR1101D ETHERNET ETHERNET ETHERNET Figure 6.4-3 View of MON plug-in module 6-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 275 To printer Cable SGND 2 RJ45 Ethernet To SCADA RS-485 To SCADA SGND Twisted pair wire RS-485 To SCADA SGND NR1101D 256M DDR SYN+ SYN- clock RS-485 SGND synchronization RS-232 To printer Cable SGND PCS-985TI Transformer Relay 6-11 Date: 2015-05-15...
Page 276 DSP module 1 and DSP module 2 have the same hardware configuration and are located in slot 02 and slot 03 respectively. The following figure shows rear view and terminal definition for the DSP module. 6-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 277 “Debouncing time” will be ignored. As shown in Figure 6.4-6. Figure 6.4-6 Debouncing technique Each BI module is with a 22-pin connector for 11 binary inputs (NR1503) or 18 binary inputs (NR1504). PCS-985TI Transformer Relay 6-13 Date: 2015-05-15...
Page 278 Opto06- Negative supply of configurable binary input 6 BI_07 Configurable binary input 7 Opto07- Negative supply of configurable binary input 7 BI_08 Configurable binary input 8 Opto08- Negative supply of configurable binary input 8 6-14 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 279 Configurable binary input 1 BI_02 Configurable binary input 2 BI_03 Configurable binary input 3 BI_04 Configurable binary input 4 BI_05 Configurable binary input 5 BI_06 Configurable binary input 6 Blank Not used BI_07 Configurable binary input 7 PCS-985TI Transformer Relay 6-15 Date: 2015-05-15...
Page 280 This binary input should be de -energized when the device is restored back to normal. Binary input: [BI_RstTarg] It is used to reset latching signal relay and LCD displaying. The reset is done by pressing a button on the panel. 6-16 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 281 BO_Trip_03 BO_Trip_04 BO_Trip_05 BO_Trip_06 BO_Trip_07 BO_Trip_08 BO_Trip_09 BO_Trip_10 BO_Trip_11 Figure 6.4-9 View of BO plug-in module (NR1521A)  NR1521H NR1521H can provide 11 output contacts controlled by fault detector. The first four output contacts PCS-985TI Transformer Relay 6-17 Date: 2015-05-15...
Page 282 PCS-Explorer software according to users’ requirement. [BO_Signal_ 4] and [BO_Siganl_5] are recommended to be configured as alarm signal output contacts, other contacts are recommended to be configured as tripping signal output contacts. 6-18 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 283 PCS-Explorer software according to user requirement. Besides, only the contact [BO_Siganl_8] is a magnetic latched NO contact. A 22-pin connector is fixed on the front of this module. The pin definition of the connector is described as below. PCS-985TI Transformer Relay 6-19 Date: 2015-05-15...
Page 284 (NO) contacts. All contacts of the module can be configured as specified signal output contacts of some protections by PCS-Explorer software according to user requirement. A 22-pin connector is fixed on the front of this module. The pin definition of the connector is described as below. 6-20 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 285 PCS-Explorer software according to users’ requirement. A 22-pin connector is fixed on the front of this module. The pin definition of the connector is described as below. PCS-985TI Transformer Relay 6-21 Date: 2015-05-15...
Page 286 At most two MR modules can be equipped located in slot 06 and 07. A 22-pin connector is fixed on the front of this module. The pin definition of the connector is described as below. 6-22 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 287 Output alarm signal contact 2 of channel 3 of mechanical protection x (NO contact). 14-15 BO_MR x.Sig4_2 Output alarm signal contact 2 of channel 4 of mechanical protection x (NO contact). group output contacts PCS-985TI Transformer Relay 6-23 Date: 2015-05-15...
Page 288 For AI module, if the plug is not put in the socket, external CT circuit is closed itself. It is shown as below. Plug Socket plug is not put in the socket 6-24 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 289 6-channel current and 2-channel voltage AI module. The rated values of current inputs are selected at order. A 24-pin connector is fixed on the front of this module. The pin definition of the connector is described as below. PCS-985TI Transformer Relay 6-25 Date: 2015-05-15...
Page 290 200V, and the rated voltage of other voltage channels is 100~130V. If user needs other analog input configuration, please declare in the technical scheme and the contract. Following figure shows the default terminal definition of the first six NR1401 modules. 6-26 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 291 2421 2621 2622 2422 2623 2423 2424 2624 Figure 6.4-18 Default terminal definition of the first six NR1401 modules The last NR1401 module (i.e. the 6I2U 1401 module shown in Figure 6.4-17) is reserved. PCS-985TI Transformer Relay 6-27 Date: 2015-05-15...
Page 292: Hmi Module
CPU through serial port etc. The liquid crystal display module is a high-performance grand liquid crystal panel with soft back lighting, which has a user-friendly interface and an extensive display range. 6-28 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 293 Table 7.3-1 List of main transformer system settings ............7-1 Table 7.4-1 List of step-down transformer system settings ..........7-3 Table 7.5-1 List of configuration settings ................7-5 Table 7.6-1 List of device settings ..................7-7 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 294 7 Settings Table 7.6-2 List of communication settings ................7-8 Table 7.6-3 List of label settings ..................7-12 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 295: System Settings
The rated primary voltage of main transformer LV side Tr_LVS.U1n_Plate 0.01~2000.00 (kV) that stated in the name plate. 0: Wye The winding connection mode of HV side of main Tr_HVS.WdgConn 1: Delta transformer. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 296 Tr_LVS.I1n 0~60000(A) transformer. The secondary rated current of CT of LV side of main Tr_LVS.I2n 1A/5 A transformer. The primary rated current of neutral point residual CT of Tr_HVS.I1n_NP 0~60000(A) HV side of main transformer. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 297 (n=1 or 2). The secondary rated voltage of VT of LV side branch 1 STn_Br1.U2n 0.01~300.00(V) of step-down transformer n (n=1 or 2). STn_Br2.U1n 0.01~2000.00(kV) The primary rated voltage of VT of LV side branch 2 of PCS-985TI Transformer Protection Date: 2015-05-15...
Page 298: Configuration Settings
Configuration settings are usually configured in factory or configured by field commission engineer according to the design drawing and project requirement. Modifying configuration settings need special warrant to input the special password. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 299: Setting List
HV side of step-down transformer 2. Reverse polarity direction ST2_HVS.En_RevCT conventional CT of HV side of step-down transformer 2. Reverse the polarity direction of CT of LV side ST2_Br1.En_RevCT branch 1 of step-down transformer 2. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 300 When it is set as “1”, the accumulate 81O.En_NVM_ Accu duration of overfrequency protection will not be cleared even when the device is not powered. length measuring window 81R.MeasWindow 3~25 rate-of-frequency-change. 7.5.2 Access Path MainMenuSettingsConfig Settings PCS-985TI Transformer Protection Date: 2015-05-15...
Page 301: Device Settings
1: Use moveable disk to realize the backup and recovery function. 0: Moveable disk will be disabled. A moveable mdisk is implemented on the MON plug-in module to backup and restore programs, settings and configurations. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 302: Communication Settings
Enable/disable the IP address of port 4. 000.000.000.000~ 12 Gateway Gateway of router. 255.255.255.255 Enable/disable sending message in broadcast mode via 13 En_Broadcast 0: disable, 1: enable network. (IEC103). 14 Addr_RS485A 0~255 Communication address between the protective device PCS-985TI Transformer Protection Date: 2015-05-15...
Page 303 SNTP message to the equipment. The local time zone also refered to as the hour offset 27 OffsetHour_UTC -12~12hrs hour from UTC . 28 OffsetMinute_UTC 0~60 The offset minute of local time from UTC. PCS-985TI Transformer Protection Date: 2015-05-15...
Page 304 1: GDD data type through IEC103 protocol is 7, i.e. 754 short real number of IEEE standard. [En_AutoPrint] If automatic print is required for disturbance report after protection operating, the setting should be set as “1”. [Opt_TimeSyn] 7-10 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 305 (Greenwich Mean Time) zone; for example, if a relay is applied in China, the time zone of China is time zone, so this setting is set as “8”. The setting [OffsetMinute_UTC] is used to set the east 8 PCS-985TI Transformer Protection 7-11 Date: 2015-05-15...
Page 306: Label Settings
Name_TrpOutpx (x=1~29) Label settings of tripping output x 7.6.3.2 Access Path MainMenuSettingsDevice SetupLabel Settings 7.7 Protection Settings All the protection settings have be given in Section “Settings” of each protection element in Chapter 3. 7-12 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 307 8.3 Understand the LCD Display ............8-20 8.3.1 Overview........................8-20 8.3.2 Display during Normal Operation ................... 8-20 8.3.3 Display When Tripping ....................8-20 8.3.4 Display under Abnormal Condition ................. 8-22 8.3.5 Display When Binary State Changes................8-23 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 308 Figure 8.3-3 LCD display 2 of trip report and alarm report..........8-22 Figure 8.3-4 LCD display of alarm report ................8-22 Figure 8.3-5 Display of binary change report..............8-23 Figure 8.3-6 Display of control report.................. 8-25 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 309 Table 8.1-1 Definition of the 8-core cable................8-4 Table 8.3-1 Tripping reports related to oscillography ............8-21 Table 8.3-2 Contact inputs list ..................... 8-24 Table 8.3-3 Contact outputs list ................... 8-24 Table 8.3-4 User Operating event list .................. 8-26 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 310 8 Human Machine Interface PCS-985TI Transformer Relay Date: 2015-05-15...
Page 311: Overview
LED or a report displayed on the LCD. Operator can locate the data of interest by navigating the keypad. HEALTHY PCS-985TI ALARM TRANSFORMER RELAY TRIP Figure 8.1-1 Front panel of the de vice PCS-985TI Transformer Relay Date: 2015-05-15...
Page 312: Keypad Operation
Activate the switching interface of setting group  leftward and rightward direction keys (“◄” and “►”): Move the cursor horizontally  Enter the next menu or return to the previous menu  upward and downward direction keys (“▲” and “▼”) PCS-985TI Transformer Relay Date: 2015-05-15...
Page 313: Led Indications
RESET button on the front panel. Other LED indicators with no labels are configurable and user can configure them to be lit by signals of operation element, alarm element and binary output contact according to requirement PCS-985TI Transformer Relay Date: 2015-05-15...
Page 314: Front Communication Port
Figure 8.1-5. The Ethernet port can be used to communication with PC via auxiliary software (PCS-Explorer) after connecting the protection device with PC, so as to fulfill on-line function (please refer to the PCS-985TI Transformer Relay Date: 2015-05-15...
Page 315: Understand The Hmi Menu Tree
“first in first out” principle. It is arranged from top to bottom and in accordance with the execution order of command menus. Press “▲” to enter the main menu, the interface is shown in the following diagram: PCS-985TI Transformer Relay Date: 2015-05-15...
Page 316 Measurements Status Records Settings Print Local Cmd Information Test Clock Language NOTICE! The menu shown in following figure is NOT the specific-application menu. For each project, the menu VARIES with the protection configuration. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 317 ST2 Bak Prot Values Contact Outputs Status Internal Signal Disturb Item Inputs HMI Setup Contact Inputs Clock BackLitDur Outputs Contrast Contact Outputs Language SupervLCD FD Status SupervLED Figure 8.2-1 Tree diagram of total command menu PCS-985TI Transformer Relay Date: 2015-05-15...
Page 318: Measurements
Display magnitude of differential current and restraint current of current ST1 Diff Values differential protection of step-down transformer 1 on protection DSP module. Display magnitude of AC current of HV side of step-down transformer 1 ST1 HVS Values on protection DSP module. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 319 Display magnitude of AC current of HV side of step-down transformer 1 ST1 HVS Values on fault detector DSP module. Display magnitude of AC current and voltage of each branch of LV side of ST1 Br Values step-down transformer 1 on fault detector DSP module. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 320 Display status values related to earth fault protection of main transformer Tr HVS EF Prot Values HV side on fault detector DSP module. Tr HVS Impedance Prot Display status values related to impedance protection of main transformer 8-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 321: Status
Description Inputs Display all input signal states Outputs Display all output signal states 8.2.3.1 Inputs The menu “Inputs” has following submenus. Item Description Contact Inputs Display states of binary inputs derived from opto-isolated channels PCS-985TI Transformer Relay 8-11 Date: 2015-05-15...
Page 322: Records
To display and modify the s ettings related to device setup 8.2.5.1 Prot Settings The submenu “Prot Settings” includes the following command menus. Item Function description Tr Diff Settings To display and modify the settings of main transformer differential 8-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 323 To display and modify the settings of thermal overload protection o f main TrMVS OvLd Settings transformer MV side. TrMVS BFP Settings To display and modify the settings of breaker failure protection of main PCS-985TI Transformer Relay 8-13 Date: 2015-05-15...
Page 324 Function description Device Settings To display and modify the device settings. Comm Settings To display and modify the communication settings . Label Settings To display and modify the label settings of the output signals. 8-14 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 325: Print
To print the settings related to device setup Print all settings included in “Settings” submenu All Settings Latest Chgd Settings Print the latest modified settings (1) The submenu “Prot Settings” includes the following command menus. PCS-985TI Transformer Relay 8-15 Date: 2015-05-15...
Page 326 TrMVS OvLd Settings side. To print the settings of breaker failure protection of main transformer MV TrMVS BFP Settings side. To print the settings of phase overcurrent protection of main transformer LV TrLVS OC Settings side. 8-16 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 327 To print the recorded current waveforms of main transformer current Tr Diff Wave differential protection. Tr Curr Wave To print the recorded current waveforms of main transformer protection. Tr Volt Wave To print the recorded voltage waveforms of main transformer protection. PCS-985TI Transformer Relay 8-17 Date: 2015-05-15...
Page 328: Local Cmd
Monitor the current working state of each intelligent module of the Board Info equipment 8.2.9 Test This menu is used for developers to debug the program and for engineers to maintain the device. 8-18 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 329: Clock
The current time of internal clock can be viewed here. The time is displayed in the form YY-MM-DD and hh:mm:ss. All values are presented with digits and can be modified. 8.2.11 Language This menu is mainly used for set LCD display language. PCS-985TI Transformer Relay 8-19 Date: 2015-05-15...
Page 330: Understand The Lcd Display
8.3.3 Display When Tripping This protection device can store 64 fault reports and 64 fault waveforms. When there is protection element operating, the LCD will automatically display the latest fault report, and two kinds of LCD 8-20 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 331 As to the upper half part, it displays separately the record number of fault report, fault name, generating PCS-985TI Transformer Relay 8-21 Date: 2015-05-15...
Page 332: Display Under Abnormal Condition
This protection device can store 1024 self-check reports. During the running of protection device, the self-check report of hardware errors or system running abnormity will be displayed immediately. Superv Events NO.4 2014-11-29 9:18:47:500ms Settings_Chgd Figure 8.3-4 LCD display of alarm report 8-22 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 333: Display When Binary State Changes
PCS-Explorer software. NOTICE! The binary input number of BI intelligent module of different type may be DIFFERENT and signals list in following table are just for reference, please refer to Chapter “Hardware” for details. PCS-985TI Transformer Relay 8-23 Date: 2015-05-15...
Page 334 TrpOut09 The 9 group of tripping output contacts. TrpOut10 The 10 group of tripping output contacts. TrpOut11 The 11 group of tripping output contacts. TrpOut12 The 12 group of tripping output contacts. 8-24 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 335: Display Device Logs
Figure 8.3-6 Display of control report Device Logs NO. 4 shows the title and the number of the report 2008-11-28 10:18:47:569 shows the date and time when the report occurred, the format is year–month-date and hour:minute:second:millisecond PCS-985TI Transformer Relay 8-25 Date: 2015-05-15...
Page 336: Keypad Operation
14 lines of information at most). Press the key “◄” or “►” to select pervious or next command menu. Press the key “ENT” or “ESC” to exit this menu (returning to the “Status” menu). 8-26 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 337: View Device Records
“ENT” or “►” to enter the menu. Press the key “▲” or “▼” to move the cursor to any command menu, and then press the “ENT” to enter the menu. Selecting the “Disturb Records”, and then  PCS-985TI Transformer Relay 8-27 Date: 2015-05-15...
Page 338: Modify Device Setting
Press the key “▲” or “▼” to move the cursor to the “Settings” menu, and then press the key “ENT” or “►” to enter the menu. Press the key “▲” or “▼” to move the cursor to any command menu, and then press 8-28 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 339 (returning to the menu “Settings”). Press the key “◄” or “►” to move the cursor to select “Yes”, and then press the key “ENT”, the LCD will display password input interface. PCS-985TI Transformer Relay 8-29 Date: 2015-05-15...
Page 340 [Tr.87T.I_Biased] is selected to modify, then press the “ENT” to enter and the LCD will display the following interface. is shown the “＋” or “－” to modify the value and then press the “ENT” to enter. 8-30 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 341: Copy Device Setting
Press the key “▲” or “▼” to move the cursor to the command menu “ Copy Settings”, and then press the key “ENT” to enter the menu. The following display will be shown on LCD. PCS-985TI Transformer Relay 8-31 Date: 2015-05-15...
Page 342: Switch Setting Group
Press the “＋” or “－” to modify the value, and then press the key “ESC” to exit this menu (returning to the main menu). After pressing the key “ENT”, the LCD will display the password 8-32 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 343: Delete Records
The operation is as follows: Press the key “▲” to enter the main menu. Press the key “▲” or “▼” to move the cursor to the “Clock” menu, and then press the key “ENT” to enter clock display. PCS-985TI Transformer Relay 8-33 Date: 2015-05-15...
Page 344: Check Software Version
“ENT” to enter the menu. Press the key “▲” or “▼” to move the scroll bar. Press the key “ENT” or “ESC” to exit this menu (returning to the “Information” menu). 8-34 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 345: Select Language
“ENT” to execute language switching. After language switching is finished, LCD will return to the menu “Language”, and the display language is changed. Otherwise, press the key “ESC” to cancel language switching and return to the menu “ Language”. PCS-985TI Transformer Relay 8-35 Date: 2015-05-15...
Page 346 8 Human Machine Interface 8-36 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 347 Figure 9.3-4 Function group configuration interface............9-5 Figure 9.5-1 Setup of setting group ..................9-10 Figure 9.5-2 Modify setting name command ................9-11 Figure 9.5-3 Modify setting name dialog box ...............9-11 Figure 9.5-4 Modify a setting value..................9-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 348: Configurable Function
9 Configurable Function PCS-985TI Transformer Relay Date: 2015-05-15...
Page 349: General Description
By adoption of PCS-Explorer software, it is able to make device configuration, function configuration, LCD configuration, binary input and binary output configuration, LED indicator configuration, setting configuration and programming logic for PCS-985TI. 9.2 Introduction on PCS-Explorer Software PCS-Explorer software is developed in order to meet customer’s demand on functions of UAPC platform device such as device configuration and programmable design.
Page 350: Device Information
Figure 9.3-1 Setting device information 9.3.2 MOT Choose “MOT” page to enter MOT configuration interface as shown below. According to the selected series number of MOT, some software and hardware related function can be configured. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 351: Function Configuration
Figure 9.3-2 MOT configuration interface 9.3.3 Function Configuration Choose “Function Configuration” page to enter function configuration interface as shown below (the content may vary subject to created projects). Click the pull-down list in “Code” column to perform function configuration. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 352: Functiongroup Configuration
9.3.4 Function Group Configuration Choose “Function Group Configuration” page to enter function group configuration interface as shown below (the content may vary subject to created projects). Click the pull-down list in “Code” column to perform function group configuration. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 353: Program Configuration
The control of these indicators is configured by LED element configuration in PCS-Explorer. Click “Program Config”→“Slot02:PROT_DSP” node, and select “UserPage_LED” page to view and configure LED element. The following is an example of LED configuration: PCS-985TI Transformer Relay Date: 2015-05-15...
Page 354 Figure 9.4-2 LED indicators configuration interface Next, indicators initiation signals should be placed on the page and connect them to corresponding input interfaces of LED element: select the output signal from the “Source” tab at the right side of PCS-985TI Transformer Relay Date: 2015-05-15...
Page 355: Configuration Of Bi And Bo
Click “Program Config” node. Unfold module node “Slot04:BI_S04”, one page node: “NR1504” is shown. Figure 9.4-3 Module nodes and pages in program configuration Click the page “NR1504”, the corresponding BI configuration graph is shown in an editing window. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 356 Chapter 3 for the detailed description of each configurable binary inputs. 9.4.2.2 Configuration of BO Takes BO module in slot No.08 as an example. Click “Program Config” node. Unfold module node “Slot08:IO_S08”, one page node: “NR1523A” is shown. PCS-985TI Transformer Relay Date: 2015-05-15...
Page 357: Setting Configuration
-nodes of “Setting” node will change with this parameter. Several sub-nodes: “Global” and “Group x” (x: 1~n, n is the number that inputted in the text box of PCS-985TI Transformer Relay Date: 2015-05-15...
Page 358: Browsing Settings
Here, user can modify name and set value of the settings according to actual application requirements. 9-10 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 359 During modification and editing operations of settings in the customizing editing window, modified item will become red, till users perform saving operation. PCS-985TI Transformer Relay 9-11 Date: 2015-05-15...
Page 360 9 Configurable Function Figure 9.5-4 Modify a setting value 9-12 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 361 10.5.2 Communication Profiles ....................10-7 10.5.3 MMS Communication Network Deployment ..............10-8 10.5.4 Server Data Organization ................... 10-11 10.5.5 Server Features and Configuration................10-14 10.5.6 ACSI Conformance ....................10-16 10.5.7 Logical Nodes ......................10-20 10.6 DNP3.0 Interface ....................10-23 10.6.1 Overview ........................10-23 PCS-985TI Transformer Relay 10-a Date: 2015-05-15...
Page 362 10 Communications 10.6.2 Link Layer Functions ....................10-23 10.6.3 Transport Functions ....................10-23 10.6.4 Application Layer Functions..................10-23 List of Figures Figure 10.2-1 EIA RS-485 bus connection arrangements ........... 10-2 Figure 10.2-2 Ethernet communication cable ..............10-3 Figure 10.2-3 Ethernet communication structure ............... 10-4 Figure 10.5-1 Dual-net full duplex mode sharing the RCB block instance ......
Page 363: Communications
However, this product does not provide such a facility, so an external termination resistor is required when it is located at the bus terminus. PCS-985TI Transformer Relay 10-1 Date: 2015-05-15...
Page 364 (optionally) be able to provide the bus bias that the external components will not be required. NOTICE! It is extremely IMPORTANT that the 120Ω termination resistors are fitted. Failure to do 10-2 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 365: Ethernet Interface
Dual-network is recommended in order to increase reliability. SCADA is also connected to the exchanger acting as the master station, and every device which has been connected to the exchanger will act as a slave unit. PCS-985TI Transformer Relay 10-3 Date: 2015-05-15...
Page 366: Iec60870-5-103 Communication
The protective device conforms to compatibility level 3. The following IEC60870-5-103 facilities are supported by this interface: Initialization (reset)  Time synchronization  Event record extraction  General interrogation  General commands  10-4 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 367: Physical Connection And Link Layer
Input and alarm element are sent by ASDU1 (time-tagged message). The cause of transmission (COT) of these responses is 1. The complete list of all events produced by the protective device can be printed by choosing the submenu “IEC103 Info” in the menu “Print”. PCS-985TI Transformer Relay 10-5 Date: 2015-05-15...
Page 368: General Interrogation
The complete set includes: IEC 61850-1: Introduction and overview  IEC 61850-2: Glossary  IEC 61850-3: General requirements  IEC 61850-4: System and project management  10-6 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 369 HMI programs or SOE logging software. Servers are usually substation device such as protection relays, meters, RTUs, instrument transformers, tap changers, or bay controllers. Please note that gateways can be considered as clients and servers subject to the communication PCS-985TI Transformer Relay 10-7 Date: 2015-05-15...
Page 370 Note! Hereinafter, the normal operation status of net means the physical link and TCP link are both ok. The abnormal operation status of net means physical link or TCP link is broken. Mode 1: Dual-net full duplex mode sharing the same RCB instance 10-8 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 371 In mode 1, one report will be transmitted twice via dual nets for the same report instance, so the client needs to distinguish whether two reports are same according to corresponding EntryIDs. Mode 2: Dual-net hot-standby mode sharing the same RCB instance PCS-985TI Transformer Relay 10-9 Date: 2015-05-15...
Page 372 Net B IP address of the IED must be configured as 198.121.1.2, i.e.: Net A IED host address =1x256+2=258, Net B IED host address =1x256+2=258, Net A IED host address equals to Net B IED host address. Mode 3: Dual-net full duplex mode with 2 independent RCB instances 10-10 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 373: Server Data Organization
(for proxy). Each logical device can contain many logical nodes. Each logical node can contain many data objects. Each data object is composed of data attributes and data attribute components. Services are available at each level for performing PCS-985TI Transformer Relay 10-11 Date: 2015-05-15...
Page 374 GGIO provides digital status points for access by clients. It is intended for the use of GGIO by client to access to digital status values from PCS-985TI relays. Clients can utilize the IEC61850 buffered report from GGIO to build sequence of events (SOE) logs and HMI display screens.
Page 375 IED will be blocked until Loc is changed to false. In PCS-985TI relays, besides the logical nodes described above, there are some other logical nodes in the IEDs: LPHD: Physical device information, the logical node to model common issues for physical ...
Page 376: Server Features And Configuration
MSQI). The reporting control blocks can be configured in CID files, an d then be sent to the IED via an IEC61850 client. The following items can be configured. TrgOps: Trigger options.  The following bits are supported by PCS-985TI relays: － Bit 1: Data-change － Bit 4: Integrity － Bit 5: General interrogation OptFlds: Option Fields.
Page 377 10 Communications 10.5.5.2 File Transfer MMS file services allows transfer of oscillography, event record or other files from a PCS-985TI relay. 10.5.5.3 Timestamps The timestamp values associated with all IEC61850 data items represent the time of the last change of either the value or quality flags of the data item.
Page 378: Acsi Conformance
Subscriber side Where: C1: Shall be "M" if support for LOGICAL-DEVICE model has been declared O: Optional M: Mandatory Supported by PCS-985TI relay Currently not supported by PCS-985TI relay 10.5.6.2 ACSI Models Conformance Statement Services Client Server PCS-985TI Logical device...
Page 379 C2: Shall be "M" if support for LOGICAL-NODE model has been declared C3: Shall be "M" if support for DATA model has been declared C4: Shall be "M" if support for DATA-SET, Substitution, Report, Log Control, or Time models has been declared PCS-985TI Transformer Relay 10-17 Date: 2015-05-15...
Page 380 ServerDirectory Application association Associate Abort Release Logical device LogicalDeviceDirectory Logical node LogicalNodeDirectory GetAllDataValues Data GetDataValues SetDataValues GetDataDirectory GetDataDefinition Data set GetDataSetValues SetDataSetValues CreateDataSet DeleteDataSet GetDataSetDirectory Substitution SetDataValues Setting group control SelectActiveSG SelectEditSG SetSGValuess ConfirmEditSGValues 10-18 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 381 Report S27-1 data-change S27-2 qchg-change S27-3 data-update GetURCBValues SetURCBValues Logging Log control block GetLCBValues SetLCBValues QueryLogByTime QueryLogAfter GetLogStatusValues Generic substation event model (GSE) GOOSE control block SendGOOSEMessage GetGoReference GetGOOSEElementNumber GetGoCBValues SetGoCBValuess Control Select SelectWithValue PCS-985TI Transformer Relay 10-19 Date: 2015-05-15...
Page 382: Logical Nodes
PHAR: Harmonic restraint － PHIZ: Ground detector PIOC: Instantaneous overcurrent － PMRI: Motor restart inhibition － PMSS: Motor starting time supervision － POPF: Over power factor － PPAM: Phase angle measuring － PSCH: Protection scheme 10-20 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 383 CCGR: Cooling group control － CILO: Interlocking － CPOW: Point-on-wave switching － CSWI: Switch controller G: Logical Nodes For Generic References － GAPC: Generic automatic process control GGIO: Generic process I/O － GSAL: Generic security application PCS-985TI Transformer Relay 10-21 Date: 2015-05-15...
Page 384 － YEFN: Earth fault neutralizer (Peterson coil) － YLTC: Tap changer － YPSH: Power shunt YPTR: Power transformer Z: Logical Nodes For Further Power System Equipment － ZAXN: Au xiliary network － ZBAT: Battery 10-22 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 385: Transport Functions
Please see the DNP3.0 protocol standard for the details about the transport functions. 10.6.4 Application Layer Functions 10.6.4.1 Function Code Function Code Function 0 (0x00) Confirm 1 (0x01) Read 2 (0x02) Write 3 (0x03) Select PCS-985TI Transformer Relay 10-23 Date: 2015-05-15...
Page 386 1 (read) 06 (no range, or all) Binary output: Packed format 2 (write) 00, 01 (start ~ stop) 3 (select) Binary Command: Control relay output block 4 (operate) 17, 28 (index) (CROB) 5 (direct op) 10-24 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 387 00, 01 (start ~ stop) Analog Output Status: An y Variation 1 (read) 06 (no range, or all) 00, 01 (start ~ stop) Analog Output Status: 32 ~ bit with flag 1 (read) 06 (no range, or all) PCS-985TI Transformer Relay 10-25 Date: 2015-05-15...
Page 388 06 (no range, or all) 22 (assign class) 06 (no range, or all) 1 (read) 07,08 (limited qty) Class Objects : Class 3 data 20 (enable unsol.) 21 (disable unsol.) 06 (no range, or all) 22 (assign class) 10-26 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 389 129 (response) 00, 01 (start ~ stop) Analog Input Deadband: 32 ~ bit 129 (response) 00, 01 (start ~ stop) Analog Input Deadband: Single ~ prec flt ~ pt Analog Output Status: An y Variation PCS-985TI Transformer Relay 10-27 Date: 2015-05-15...
Page 390 To the analog inputs, the attributes “deadband” and “factor” of each analog input can be configured independently. To the analog outputs, only the attribute “factor” of each analog output needs to be configured. If the integer mode is adopted for the data formats of analog values (to “Analog Input”, 10-28 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 391 Input”, “Binary Input” and “Analog Output”. The classes of the “Analog Input” and “Binary Input” can be defined by modifying relevant settings. In communication process, the DNP3.0 master can online modify the class of an “Analog Input” or a “Binary Input” through “Function Code 22” (Assign Class). PCS-985TI Transformer Relay 10-29 Date: 2015-05-15...
Page 392 10 Communications 10-30 PCS-985TI Transformer Protection Date: 2015-05-15...
Page 393 11.7.5 Guidelines for Wiring ....................11-6 11.7.6 Wiring for Electrical Cables................... 11-7 List of Figures Figure 11.6-1 Dimensions and panel cut-out of PCS-985TI ..........11-3 Figure 11.6-2 Demonstration of plugging a board into its corresponding slot ....11-4 Figure 11.7-1 Cubicle grounding system................11-5 Figure 11.7-2 Ground terminal of this device ...............11-6...
Page 394: Installation
11 Installation 11-b PCS-985TI Transformer Relay Date: 2015-04-15...
Page 395: Overview
The basic precautions to guard against electrostatic discharge are as follows:  Should boards have to be removed from this device installed in a grounded cubicle in an HV switchgear installation, please discharge yourself by touching station ground (the cubicle) beforehand. PCS-985TI Transformer Relay 11-1 Date: 2015-05-15...
Page 396: Check The Shipment
The location should not be exposed to excessive air pollution (dust, aggressive substances). Surge voltages of high amplitude and short rise time, extreme changes of temperature, high levels of humidity, severe vibration and strong induced magnetic fields should be avoided as far as possible. 11-2 PCS-985TI Transformer Relay Date: 2015-04-15...
Page 397: Mechanical Installation
(290) 482.6 Front Side 465± 0.2 +0.4 8-Ø6.8 Cut-Out Figure 11.6-1 Dimensions and panel cut-out of PCS-985TI Following figure shows the installation way of a module being plugged into a corresponding slot. PCS-985TI Transformer Relay 11-3 Date: 2015-05-15...
Page 398: Electrical Installation And Wiring
The contact surfaces must not only conduct well, they must also be non -corroding. NOTICE! If the above conditions are not fulfilled, there is a possibility of the cubicle or parts of it forming a resonant circuit at certain frequencies that would amplify the transmission of 11-4 PCS-985TI Transformer Relay Date: 2015-04-15...
Page 399: Ground Connection On The Device
There are some ground terminals on some connectors of this device, and the sign is “GND”. All the ground terminals are connected in the cabinet of this device. Therefore, the ground terminal on the rear panel (see Figure 11.7-2) is the only ground terminal of this device. PCS-985TI Transformer Relay 11-5 Date: 2015-05-15...
Page 400: Grounding Strips And Their Installation
AC voltage inputs: brained copper cable, 1.0mm ~ 2.5mm  AC current inputs: brained copper cable, 1.5mm ~ 4.0mm  Serial communication: 4-core shielded braided cable  Ethernet communication: 4-pair shielded twisted category 5E cable 11-6 PCS-985TI Transformer Relay Date: 2015-04-15...
Page 401: Wiring For Electrical Cables
The following figure shows the glancing demo about the wiring for the electrical cables. Tighten Figure 11.7-4 Glancing demo about the wiring for electrical cables PCS-985TI Transformer Relay 11-7 Date: 2015-05-15...
Page 402 11 Installation 11-8 PCS-985TI Transformer Relay Date: 2015-04-15...
Page 403: Commissioning
12.3 Commission Tools ....................12-1 12.4 Setting Familiarization ..................12-2 12.5 Product Checks ...................... 12-2 12.5.1 With the Device De-energized ..................12-3 12.5.2 With the Device Energized................... 12-5 12.5.3 On-load Checks ......................12-6 12.6 Final Checks ......................12-7 PCS-985TI Transformer Relay 12-a Date: 2015-05-15...
Page 404: Commissioning
12 Commissioning 12-b PCS-985TI Transformer Relay Date: 2015-05-15...
Page 405: Overview
Take also into consideration that the trip circuits and may be close commands to the circuit breakers and other primary switches are disconnected from the device unless expressly stated. 12.3 Commission Tools Minimum equipment required: PCS-985TI Transformer Relay 12-1 Date: 2015-05-15...
Page 406: Setting Familiarization
If the application-specific settings have been applied to the device prior to commissioning, it is 12-2 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 407: With The Device De-Energized
Carefully examine the device panel, device inside and other parts inside to see that no physical damage has occurred since installation.  Panel wiring Check the conducting wire which is used in the panel to assure that their cross section PCS-985TI Transformer Relay 12-3 Date: 2015-05-15...
Page 408 Check that the external wiring is correct to the relevant device diagram and scheme diagram. Ensure as far as practical that phasing/phase rotation appears to be as expected. Check the wiring against the schematic diagram for the installation to ensure compliance with the customer’s normal practice. 12-4 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 409: With The Device Energized
The device has latched signal devices which remember the state of the trip, auto-reclose when the device was last energized from an auxiliary supply. Therefore these indicators may also illuminate when the auxiliary supply is applied. If any of these LEDs are on then they should be PCS-985TI Transformer Relay 12-5 Date: 2015-05-15...
Page 410: On-Load Checks
The status of each binary input can be viewed using device menu. Sign “1” denotes an energized input and sign “0” denotes a de-energized input. 12.5.3 On-load Checks The objectives of the on-load checks are: Confirm the external wiring to the current and voltage inputs is correct. 12-6 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 411: Final Checks
Ensure that all event records, fault records and alarms have been cleared and LED’s has been reset before leaving the device. PCS-985TI Transformer Relay 12-7 Date: 2015-05-15...
Page 412 12 Commissioning 12-8 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 413: Maintenance
13 Maintenance 13 Maintenance Table of Contents 13 Maintenance ..................13-a 13.1 Appearance Check ....................13-1 13.2 Failure Tracing and Repair ...................13-1 13.3 Replace Failed Modules ..................13-2 13.4 Cleaning ........................13-3 13.5 Storage ........................13-3 PCS-985TI Transformer Relay 13-a Date: 2015-05-15...
Page 414 13 Maintenance 13-b PCS-985TI Transformer Relay Date: 2015-05-15...
Page 415: Appearance Check
When a failure is detected during regular testing, confirm the following: Test circuit connections are correct Modules are securely inserted in position Correct DC power voltage is applied Correct AC inputs are applied Test procedures comply with those stated in the manual PCS-985TI Transformer Relay 13-1 Date: 2015-05-15...
Page 416: Replace Failed Modules
Switch off the DC power supply  Disconnect the trip outputs  Short circuit all AC current inputs and disconnect all AC voltage inputs  Unscrew the module connector  Unplug the connector from the target module.  13-2 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 417: Cleaning
The spare device or module should be stored in a dry and clean room. Based on IEC standard 60255-1 the storage temperature should be from -40° C to +70° C, but the temperature of from 0° C to +40° C is recommended for long-term storage. PCS-985TI Transformer Relay 13-3 Date: 2015-05-15...
Page 418 13 Maintenance 13-4 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 419: Decommissioning And Disposal
14 Decommi ssioning and Di sposal 14 Decommissioning and Disposal Table of Contents 14 Decommissioning and Disposal ..........14-a 14.1 Decommissioning ....................14-1 14.2 Disposal........................14-1 PCS-985TI Transformer Relay 14-a Date: 2015-05-15...
Page 420 14 Decommi ssioning and Di sposal 14-b PCS-985TI Transformer Relay Date: 2015-05-15...
Page 421 The device rack may now be removed from the system cubicle, after which the cubicles may also be removed. 14.2 Disposal NOTICE! Strictly observe all local and national laws and regulations when disposing the device. PCS-985TI Transformer Relay 14-1 Date: 2015-05-15...
Page 422 14 Decommi ssioning and Di sposal 14-2 PCS-985TI Transformer Relay Date: 2015-05-15...
Page 423: Manual Version History
In the latest version of the instruction manual, several descriptions on existing features have been modified. Manual version and modification history records Manual Version Software Date Description of change Source Version R1.00 R1.00 2015-05-15 Form the original manual. PCS-985TI Transformer Relay 15-1 Date: 2015-05-15...
Page 424 15 Manual Version Hi story 15-2 PCS-985TI Transformer Relay Date: 2015-05-15...

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