Page 1 AQ-T256 Transformer protection IED Instruction manual...
Page 3: Table Of Contents
4.2 Configuring user levels and their passwords................. 13 5 Functions unctions ...................................................... 15 5.1 Functions included in AQ-T256.................... 15 5.2 Measurements........................16 5.2.1 Current measurement and scaling in differential applications ........16 5.2.2 Frequency tracking and scaling ................. 27 5.3 Protection functions ......................
Page 4 7 Connections and applic 7 Connections and applica a tion examples tion examples..................................255 7.1 Connections of AQ-T256 ....................255 7.2 Application example and its connections................257 7.3 Trip circuit supervision (95) ....................258 8 Construction and installa 8 Construction and installation tion ....................
Page 5 9.3 Tests and environmental ....................302 10 Or 10 Ordering inf dering informa ormation tion ............................................305 11 Contact and r 11 Contact and re e f f er erence inf ence informa ormation tion....................................307 © Arcteq Relays Ltd IM00028...
Page 6 Nothing contained in this document shall increase the liability or extend the warranty obligations of the manufacturer Arcteq Relays Ltd. The manufacturer expressly disclaims any and all liability for any damages and/or losses caused due to a failure to comply with the instructions contained herein or caused by persons who do not fulfil the aforementioned requirements.
Page 8: Document Inf
- Order codes revised. - Added double ST 100 Mbps Ethernet communication module and Double RJ45 10/100 Mbps Ethernet communication module descriptions Revision 2.02 Date 7.7.2020 Changes - A number of image descriptions improved. Revision 2.03 Date 27.8.2020 © Arcteq Relays Ltd IM00028...
Page 9 - Fixed lots of timing errors written to registers table. "Prefault" is -200 ms from Start event, "Pretrigger" is Changes -20 ms from trip (or start if fault doensn't progress to trip), "Fault" is start (or trip if fault doesn't progress to trip). - Added event history technical data Revision 2.06 Date 21.6.2022 © Arcteq Relays Ltd IM00028...
Page 10: Version 1 Revision Notes
- Added spare part codes and compatibilities to option cards. 1.2 Version 1 revision notes Table. 1.2 - 2. Version 1 revision notes Revision 1.00 Date 13.4.2016 Changes The first revision for AQ-T256, T257 and T259 IEDs. Revision 1.01 Date 10.2.2017 Order code updated Changes Added programmable stage description Revision 1.02...
Page 11: Abbr Bbre E Via Viations Tions
FFT – Fast Fourier transform FTP – File Transfer Protocol GI – General interrogation HMI – Human-machine interface HR – Holding register HV – High voltage HW – Hardware IDMT– Inverse definite minimum time IED – Intelligent electronic device © Arcteq Relays Ltd IM00028...
Page 12 SG – Setting group SOTF – Switch-on-to-fault SW – Software THD – Total harmonic distortion TRMS – True root mean square VT – Voltage transformer VTM – Voltage transformer module VTS – Voltage transformer supervision © Arcteq Relays Ltd IM00028...
Page 13: General
Version: 2.06 3 General The AQ-T256 transformer protection IED is a member of the AQ-200 product line. The hardware and software are modular: the hardware modules are assembled and configured according to the application's I/O requirements and the software determines the available functions. This manual describes the specific application of the AQ-T256 transformer protection IED.
Page 14: Ied User Interface Erface
(hardware or software) error that affects the operation of the unit. The activation of the yellow "Start" LED and the red "Trip" LED are based on the setting the user has put in place in the software. © Arcteq Relays Ltd IM00028...
Page 15: Configuring User Levels And Their Passwords
The different user levels and their star indicators are as follows (also, see the image below for the HMI view): • Super user (***) • Configurator (**) • Operator (*) • User ( - ) © Arcteq Relays Ltd IM00028...
Page 16 In AQ-250 frame units unlocking and locking a user level generates a time-stamped event to the event log. NOTE! Any user level with a password automatically locks itself after half an hour (30 minutes) of inactivity. © Arcteq Relays Ltd IM00028...
Page 17: Functions Unctions
Instruction manual Version: 2.06 5 Functions 5.1 Functions included in AQ-T256 The AQ-T256 transformer protection relay includes the following functions as well as the number of stages in those functions. Table. 5.1 - 3. Protection functions of AQ-T256. Name (number of...
Page 18: Measurements
RI: The primary current, i.e. the current which flows in the primary circuit and through the primary side of the current transformer. SEC: SEC: The secondary current, i.e. the current which the current transformer transforms according to its ratios. This current is measured by the protection relay. © Arcteq Relays Ltd IM00028...
Page 19 CT ratings and the transformer nominal current. Note that S1 is always connected to an odd connector regardless of the CT direction. The CT direction is selected in the settings of the transformer differential protection function. © Arcteq Relays Ltd IM00028...
Page 20 TrafoModule → Idx> [87T,87N] → Settings ). This way the direction of the measured currents are checked correctly from the relay's perspective. The following table presents the initial data of the connection as well as the ratings. © Arcteq Relays Ltd IM00028...
Page 21 As seen in the image above, relay calculates both the HV side nominal current (669.2 A) and the LV side nominal current (5 888.97 A). The nominal current calculations are done according to the following formulas: The HV and LV side nominal current can also be calculated in per unit values as follows: © Arcteq Relays Ltd IM00028...
Page 22 CT ratings and the transformer nominal current. Note that S1 is always connected to an odd connector regardless of the CT direction. The CT direction is selected in the settings of the transformer differential protection function. © Arcteq Relays Ltd IM00028...
Page 23 [87T,87N] → Settings ). The difference with the first application is that here the CTs point towards the protected object instead of pointing through it. The following table presents the initial data of the connection as well as the ratings. © Arcteq Relays Ltd IM00028...
Page 24 CTs are checked. In Application 2 it is necessary to inject higher amplitudes to the CTs via the secondary injection tool in order to reach the nominal currents. See the example calculation below: © Arcteq Relays Ltd IM00028...
Page 25 P/S Table. 5.2.1 - 10. Settings of the Residual I02 CT scaling. Name Unit Range Step Default Description I02 CT 1…25000 0.00001 100 The rated primary current of the current transformer. primary © Arcteq Relays Ltd IM00028...
Page 26 Sec") Table. 5.2.1 - 14. Phase current angle measurements. Name Unit Range Step Description Phase angle ILx The phase angle measurement from each of the three phase current ("Pha.angle 0.000…360.000 0.001 inputs. ILx") © Arcteq Relays Ltd IM00028...
Page 27 Name Unit Range Step Description Residual current angle The residual current angle measurement from the I01 or 0.000…360.000 0.001 I02 current input. ("Res.curr.angle I0x") Calculated I0 angle 0.000…360.000 0.001 The calculated residual current angle measurement. © Arcteq Relays Ltd IM00028...
Page 28 The calculated positive sequence current angle. ("Positive sequence curr.angle") Negative sequence current angle 0.000…360.0 0.001 The calculated negative sequence current angle. ("Negative sequence curr.angle") Zero sequence current angle 0.000…360.0 0.001 The calculated zero sequence current angle. ("Zero sequence curr.angle") © Arcteq Relays Ltd IM00028...
Page 30 FFT calculation always has a whole power cycle in the buffer. The measurement accuracy is further improved by Arcteq's patented calibration algorithms that calibrate the analog channels against eight (8) system frequency points for both magnitude and angle.
Page 31 When frequency is not measurable this value returns to value Protections set to "System nominal frequency" parameter. Frequency measurement value used in display. When f.atm. Display 0.000…75.000Hz 0.001Hz - frequency is not measurable this value is "0 Hz". © Arcteq Relays Ltd IM00028...
Page 32: Protection Functions
5.3.1 General properties of a protection function The following flowchart describes the basic structure of any protection function. The basic structure is composed of analog measurement values being compared to the pick-up values and operating time characteristics. © Arcteq Relays Ltd IM00028...
Page 33 A A Q Q -T256 -T256 Instruction manual Version: 2.06 The protection function is run in a completely digital environment with a protection CPU microprocessor which also processes the analog signals transformed into the digital form. © Arcteq Relays Ltd IM00028...
Page 34 Figure. 5.3.1 - 10. Pick up and reset. The pick-up activation of the function is not directly equal to the START signal generation of the function. The START signal is allowed if a blocking condition is not active. © Arcteq Relays Ltd IM00028...
Page 35 • Definite time operation (DT): activates the trip signal after a user-defined time delay regardless of the measured current as long as the current is above or below the X value and thus the pick-up element is active (independent time characteristics). © Arcteq Relays Ltd IM00028...
Page 36 Selects whether the delay curve series for an IDMT operation follows either IEC or IEEE/ANSI standard defined characteristics. Delay curve 0: IEC 0: IEC series 1: IEEE This setting is active and visible when the "Delay type" parameter is set to "IDMT". © Arcteq Relays Ltd IM00028...
Page 37 "Param". Defines the Constant C for IEEE characteristics. This setting is active and visible when the "Delay type" parameter is 0.0000…250.0000 0.0001 0.0200 set to "IDMT" and the "Delay characteristic" parameter is set to "Param". © Arcteq Relays Ltd IM00028...
Page 38 = Operating delay (s) t = Operating delay (s) k = Time dial setting k = Time dial setting = Measured maximum current = Measured maximum current = Pick-up setting = Pick-up setting © Arcteq Relays Ltd IM00028...
Page 39 1: Yes reset. release time The behavior of the stages with different release time configurations are presented in the figures below. Figure. 5.3.1 - 14. No delayed pick-up release. © Arcteq Relays Ltd IM00028...
Page 40 -T256 Instruction manual Version: 2.06 Figure. 5.3.1 - 15. Delayed pick-up release, delay counter is reset at signal drop-off. Figure. 5.3.1 - 16. Delayed pick-up release, delay counter value is held during the release time. © Arcteq Relays Ltd IM00028...
Page 41: Non-Directional Overcurrent Protection (I>; 50/51)
The blocking signal and the setting group selection control the operating characteristics of the function during normal operation, i.e. the user or user-defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 42 1 ms. The function also provides a resettable cumulative counter for the START, TRIP and BLOCKED events. The following figure presents a simplified function block diagram of the non-directional overcurrent function. Figure. 5.3.2 - 18. Simplified function block diagram of the I> function. © Arcteq Relays Ltd IM00028...
Page 43 1: RMS Defines which available measured magnitude is used by the function. 3: Peak- to-peak 1: Side 1 1: Side Measurement side Defines which current measurement module is used by the function. 2: Side 2 © Arcteq Relays Ltd IM00028...
Page 44 When the function has detected a fault and counts down time towards a trip, remaining 0.000...1800.000s 0.005s this displays how much time is left before tripping occurs. to trip meas 0.00...1250.00 0.01 The ratio between the highest measured phase current and the pick-up value. at the moment © Arcteq Relays Ltd IM00028...
Page 45 This function supports definite time delay (DT) and inverse definite minimum time delay (IDMT). For detailed information on these delay types please refer to the chapter "General properties of a protection function" and its section "Operating time characteristics for trip and reset". © Arcteq Relays Ltd IM00028...
Page 46 NOC1 Phase B Start ON NOC1 Phase B Start OFF NOC1 Phase C Start ON NOC1 Phase C Start OFF NOC1 Phase A Trip ON NOC1 Phase A Trip OFF NOC1 Phase B Trip ON © Arcteq Relays Ltd IM00028...
Page 47 NOC3 Phase C Start ON NOC3 Phase C Start OFF NOC3 Phase A Trip ON NOC3 Phase A Trip OFF NOC3 Phase B Trip ON NOC3 Phase B Trip OFF NOC3 Phase C Trip ON © Arcteq Relays Ltd IM00028...
Page 48: Non-Directional Earth Fault Protection (I0>; 50N/51N)
The non-directional earth fault function uses a total of eight (8) separate setting groups which can be selected from one common source. © Arcteq Relays Ltd IM00028...
Page 49 1 ms. The function also provides a resettable cumulative counter for the START, TRIP and BLOCKED events. The following figure presents a simplified function block diagram of the non-directional earth fault function. Figure. 5.3.3 - 20. Simplified function block diagram of the I0> fucntion. © Arcteq Relays Ltd IM00028...
Page 50 Measurement 1: Side Defines which current measurement module is used by the function. side 2: Side 1: I01 2: I02 Input selection 1: I01 Defines which measured residual current is used by the function. I0Calc © Arcteq Relays Ltd IM00028...
Page 51 When the function has detected a fault and counts down time towards a trip, this remaining 0.000...1800.000 s displays how much time is left before tripping occurs. to trip meas at the 0.00...1250.00 0.01 The ratio between the measured current and the pick-up value. moment © Arcteq Relays Ltd IM00028...
Page 52 The events triggered by the function are recorded with a time stamp and with process data values. Table. 5.3.3 - 41. Event messages. Event block name Event names NEF1 Start ON NEF1 Start OFF NEF1 Trip ON NEF1 Trip OFF NEF1 Block ON NEF1 Block OFF © Arcteq Relays Ltd IM00028...
Page 53: Negative Sequence Overcurrent/ Phase Current Reversal/ Current Unbalance Protection (I2>; 46/46R/46L)
The blocking signal and the setting group selection control the operating characteristics of the function during normal operation, i.e. the user or user-defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 54 Zero sequence and component sequence angles are used for fault registering and for fault analysis processing. A -20 ms averaged value of the selected magnitude is used for pre-fault data registering. © Arcteq Relays Ltd IM00028...
Page 55 Pick-up setting for I2/I1 mode 1…200% 0.01% The pick-up activation of the function is not directly equal to the START signal generation of the function. The START signal is allowed if the blocking condition is not active. © Arcteq Relays Ltd IM00028...
Page 56 • Inverse definite minimum time (IDMT): gives the TRIP signal after a time which is in relation to the set pick-up value I and the measured current I (dependent time characteristics). Both IEC and IEEE/ANSI standard characteristics as well as user settable parameters are available for the IDMT operation. © Arcteq Relays Ltd IM00028...
Page 57 START, TRIP, and BLOCKED. The user can select the status ON or OFF for messages in the main event buffer. The function offers four (4) independent stages; the events are segregated for each stage operation. © Arcteq Relays Ltd IM00028...
Page 58 Date and time Event Used SG current current current currents remaining Setting dd.mm.yyyy Event Start/Trip Start/Trip Start -200ms I1, I2, IZ mag. 0 ms...1800s group 1...8 hh:mm:ss.mss name -20ms current current current and ang. active © Arcteq Relays Ltd IM00028...
Page 59: Harmonic Overcurrent Protection (Ih>; 50H/51H/68H)
START and TRIP events simultaneously with an equivalent time stamp. The time stamp resolution is 1 ms. The function also provides a resettable cumulative counter for the START, TRIP and BLOCKED events. The following figure presents a simplified function block diagram of the non-directional harmonic overcurrent function. © Arcteq Relays Ltd IM00028...
Page 60 The magnitudes (RMS) of phase L1 (A) current components: - Fundamental harmonic harmonic harmonic harmonic harmonic IL1FFT 5 ms harmonic harmonic - 11 harmonic - 13 harmonic - 15 harmonic - 17 harmonic - 19 harmonic. © Arcteq Relays Ltd IM00028...
Page 61 The magnitudes (RMS) of residual I0 current components: - Fundamental harmonic harmonic harmonic harmonic harmonic I01FFT 5 ms harmonic harmonic - 11 harmonic - 13 harmonic - 15 harmonic - 17 harmonic - 19 harmonic. © Arcteq Relays Ltd IM00028...
Page 62 5: Off 1: Side 1 Ih> Defines which current measurement module is used by the function. Visible if the unit measurement 1: Side 1 2: Side 2 has more than one current measurement module. side © Arcteq Relays Ltd IM00028...
Page 63 5.00…200.00% 0.01% 20.00% (percentage monitoring) The pick-up activation of the function is not directly equal to the START signal generation of the function. The START signal is allowed if the blocking condition is not active. © Arcteq Relays Ltd IM00028...
Page 64 This function supports definite time delay (DT) and inverse definite minimum time delay (IDMT). For detailed information on these delay types please refer to the chapter "General properties of a protection function" and its section "Operating time characteristics for trip and reset". © Arcteq Relays Ltd IM00028...
Page 65 The function registers its operation into the last twelve (12) time-stamped registers. The register of the function records the ON event process data for START, TRIP or BLOCKED. The table below presents the structure of the function's register content. © Arcteq Relays Ltd IM00028...
Page 66: Circuit Breaker Failure Protection (Cbfp; 50Bf/52Bf)
1 ms. The function also provides a resettable cumulative counters for RETRIP, CBFP, CBFP START and BLOCKED events. The following figure presents a simplified function block diagram of the circuit breaker failure protection function. © Arcteq Relays Ltd IM00028...
Page 67 START or TRIP event. General settings The following general settings define the general behavior of the function. These settings are static i.e. it is not possible to change them by editing the setting group. © Arcteq Relays Ltd IM00028...
Page 68 Selects the residual current monitoring source, which can be either from the two 1: I01 0: Not I0Input separate residual measurements (I01 and I02) or from the phase current's 2: I02 in use calculated residual current. 3: I0Calc © Arcteq Relays Ltd IM00028...
Page 69 This parameter is visible only when Allow setting of individual LN mode is enabled in behaviour 4: Test/ General menu. Blocked 5: Off 0: Normal 1: Start CBFP condition 2: ReTrip Displays status of the protection function. 3: CBFP On 4: Blocked © Arcteq Relays Ltd IM00028...
Page 70 CBFP starts the timer. This setting defines how long the starting condition CBFP 0.000…1800.000s 0.005s 0.200s has to last before the CBFP signal is activated. The following figures present some typical cases of the CBFP function. © Arcteq Relays Ltd IM00028...
Page 71 The retrip is wired from its own device output contact in parallel with the circuit breaker's redundant trip coil. The CBFP signal is normally wired from its device output contact to the incomer breaker. Below are a few operational cases regarding the various applications. © Arcteq Relays Ltd IM00028...
Page 72 CBFP signal to the incomer breaker. If the primary protection function clears the fault, both counters (RETRIP and CBFP) are reset as soon as the measured current is below the threshold settings. © Arcteq Relays Ltd IM00028...
Page 73 (RETRIP and CBFP) are reset as soon as the measured current is below the threshold settings or the tripping signal is reset. This configuration allows the CBFP to be controlled with current-based functions alone, and other function trips can be excluded from the CBFP functionality. © Arcteq Relays Ltd IM00028...
Page 74 This configuration allows the CBFP to be controlled with current-based functions alone, with added security from current monitoring. Other function trips can also be included in the CBFP functionality. © Arcteq Relays Ltd IM00028...
Page 75 Probably the most common application is when the device's trip output controls the circuit breaker trip coil, while one dedicated CBFP contact controls the CBFP function. Below are a few operational cases regarding the various applications and settings of the CBFP function. © Arcteq Relays Ltd IM00028...
Page 76 CBFP signal is sent to the incomer breaker. If the primary protection function clears the fault, the counter for CBFP resets as soon as the measured current is below the threshold settings. © Arcteq Relays Ltd IM00028...
Page 77 The time delay counter for CBFP is reset as soon as the measured current is below the threshold settings or the tripping signal is reset. This configuration allows the CBFP to be controlled by current-based functions alone, and other function trips can be excluded from the CBFP functionality. © Arcteq Relays Ltd IM00028...
Page 78 This configuration allows the CBFP to be controlled by current-based functions alone, with added security from current monitoring. Other function trips can also be included to the CBFP functionality. © Arcteq Relays Ltd IM00028...
Page 79 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Device configuration as a dedicated CBFP unit Figure. 5.3.6 - 33. Wiring diagram when the device is configured as a dedicated CBFP unit. © Arcteq Relays Ltd IM00028...
Page 80 The events triggered by the function are recorded with a time stamp and with process data values. Table. 5.3.6 - 62. Event messages. Event block name Event names CBF1 Start ON CBF1 Start OFF CBF1 Retrip ON CBF1 Retrip OFF © Arcteq Relays Ltd IM00028...
Page 81: Low-Impedance Or High-Impedance Restricted Earth Fault/ Cable End Differential Protection (I0D>; 87N)
The function uses a total of eight (8) separate setting groups which can be selected from one common source. The operating mode of the function can be changed via setting group selection. The operational logic consists of the following: • input magnitude selection © Arcteq Relays Ltd IM00028...
Page 82 RMS measurement of phase L3 (C) current I01RMS RMS measurement of residual input I01 I02RMS RMS measurement of residual input I02 IL1Ang Angle of phase L1 (A) current IL2 Ang Angle of phase L2 (B) current © Arcteq Relays Ltd IM00028...
Page 83 The residual current mode is more calculation current (Phase and I0 sensitive while the maximum current is coarser. max) 0.01…50.00% I0d> pick- 0.01% Setting for basic sensitivity of the differential characteristics. (of I © Arcteq Relays Ltd IM00028...
Page 84 Figure. 5.3.7 - 36. Differential characteristics for the I0d> function with default settings. The equations for the differential characteristics are the following: Figure. 5.3.7 - 37. Differential current (the calculation is based on user-selected inputs and direction). © Arcteq Relays Ltd IM00028...
Page 85 The blocking signal can also be tested in the commissioning phase by a software switch signal when the relay's testing mode "Enable stage forcing" is activated ( General → Device ). © Arcteq Relays Ltd IM00028...
Page 86 CTs are still within the promised 5P class (which is probably the most common CT accuracy class). When the current natural unbalance is compensated in this situation, the differential settings may be set to be more sensitive and the natural unbalance does not, therefore, affect the calculation. © Arcteq Relays Ltd IM00028...
Page 87 During an outside earth fault the circulating residual current in the faulty phase winding does not cause a trip because the comparison of the measured starpoint current and the calculated residual current differential is close to zero. © Arcteq Relays Ltd IM00028...
Page 88 If the fault is located inside of the transformer and thus inside of the protection area, the function catches the fault with high sensitivity. Since the measured residual current now flows in the opposite direction than in the outside fault situation, the measured differential current is high. © Arcteq Relays Ltd IM00028...
Page 89 TRIP-activated and BLOCKED signals. The user can select which event messages are stored in the main event buffer: ON, OFF, or both. The events triggered by the function are recorded with a time stamp and with process data values. © Arcteq Relays Ltd IM00028...
Page 90: Transformer Status Monitoring
• LV side inrush • normal load • overloading • heavy overloading. These signals can be used in indication or in logic programming, and they are the basis for the events the function generates (if so chosen). © Arcteq Relays Ltd IM00028...
Page 91 The function's outputs are dependent on the set transformer data because the measured currents (in p.u.) are related to the transformer nominal values. The following diagram presents the function's outputs in various situations. Figure. 5.3.8 - 45. Activation of the function's outputs. © Arcteq Relays Ltd IM00028...
Page 92 The transformer's short-circuit impedance in Transformer 0.01…25.00% 0.01% 3.00% Info percentages. Used for calculating short- circuit current. The transformer's nominal frequency. Used Transformer 10…75Hz 50Hz Info for calculating the transformer's nominal nom. freq. short-circuit inductance. © Arcteq Relays Ltd IM00028...
Page 93 Dy1, this is set to 30 degrees. 0.0...360.00deg 0.1deg 0.0deg phase angle - transformer The selection is visible only if the option differential "Manual set" is selected for the vector group setting. © Arcteq Relays Ltd IM00028...
Page 94 LV poles of the transformer. Shows how the calculated maximum two-phase LV side 2ph 0.001...500.000kA 0.001kA 0.000kA Info short-circuit current in the LV side is seen in the SC to HV side HV side. © Arcteq Relays Ltd IM00028...
Page 95 LV side inrush OFF TRF1 Load normal ON TRF1 Load normal OFF TRF1 Overloading ON TRF1 Overloading OFF TRF1 High overload ON TRF1 High overload OFF TRF1 Setting changes, calculating new transformer data TRF1 Calculation finished, possible restart © Arcteq Relays Ltd IM00028...
Page 96: Transformer Thermal Overload Protection (Tt>; 49T)
100 % indefinitely but never exceeds it. With a single time constant model the cooling of the object follows this same behavior, the reverse of the heating when the current feeding is zero. © Arcteq Relays Ltd IM00028...
Page 97 The ambient temperature compensation takes into account the set minimum and maximum temperatures and the load capacity of the protected object as well as the measured or set ambient temperature. The calculated coefficient is a linear correction factor, as the following formula shows: © Arcteq Relays Ltd IM00028...
Page 98 Function inputs and outputs The blocking signal and the setting group selection control the operating characteristics of the function during normal operation, i.e. the user or user-defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 99 TRMS measurement of phase L1 (A) current 5 ms IL2TRMS TRMS measurement of phase L2 (B) current 5 ms IL3TRMS TRMS measurement of phase L3 (C) current 5 ms Temperature measurement for the ambient correction 5 ms © Arcteq Relays Ltd IM00028...
Page 100 Linear 1: Set curve user-settable curve. The default setting is "0: Linear est." which means curve est. the internally calculated correction for ambient temperature. © Arcteq Relays Ltd IM00028...
Page 101 Alarm 1 0.0…150.0% 0.1% ALARM 1 activation threshold. level Enable 0: Disabled TT> Disabled Enabling/disabling the ALARM 2 signal and the I/O. 1: Enabled Alarm 2 TT> Alarm 2 0.0…150.0% 0.1% ALARM 2 activation threshold. level © Arcteq Relays Ltd IM00028...
Page 102 1: On 2: Blocked Set mode of TOLT block. TT> LN 3: Test behaviour 4: Test/ This parameter is visible only when Allow setting of individual LN mode is enabled in General menu. Blocked 5: Off © Arcteq Relays Ltd IM00028...
Page 103 - TT> T est. with act. curr.: estimation of the used thermal capacity including the current at a given moment - TT> T at a given moment: the thermal capacity used at that moment © Arcteq Relays Ltd IM00028...
Page 104 The function registers its operation into the last twelve (12) time-stamped registers. The register of the function records the ON event process data for TRIP, BLOCKED, etc. signals. The table below presents the structure of the function's register content. © Arcteq Relays Ltd IM00028...
Page 105: Generator/Transformer Differential Protection (Idb>/Idi>/I0Dhv>/I0Dlv>; 87T/87N/ 87G)
This function can also be used for protecting generators. Figure. 5.3.10 - 49. Differential protection function can be used for protecting transformers, generators and both at the same time. © Arcteq Relays Ltd IM00028...
Page 106 Fuses could be considered for applications, device as the cost of fixing failures is probably higher than the limiting the short-circuit current. motors, small cost of monitoring. generators. If the transformer is oil-insulated, oil level monitoring should be applied. © Arcteq Relays Ltd IM00028...
Page 107 (such as in the bus or in the cables connected to the transformer). Faults of this type are easily repaired and the transformer can be re- energized soon after the fault has bee cleared. © Arcteq Relays Ltd IM00028...
Page 108 • the ratios and properties of the transformers HV and LV sides. This chapter shows the setting and the principle of transformer differential protection step by step. Figure. 5.3.10 - 50. Transformer and its components forming the differential zone. © Arcteq Relays Ltd IM00028...
Page 109 Let us further say the HV side current transformers are 150/5 A and the LV side current transformers are 1200/5 A. The primary side factor (p.u.) and current are then calculated as follows: Then, the secondary side factor (p.u.) and current are calculated as follows: © Arcteq Relays Ltd IM00028...
Page 110 LV side is leading 30 degrees; '5' and '7' are just the other ends of the windings thus causing a 180-degree difference between the '1' and '11' clock numbers. The following example explains transformer current vectors and what a connection might look like. © Arcteq Relays Ltd IM00028...
Page 111 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 5.3.10 - 53. Yd1 transformer's internal connection (in theory). © Arcteq Relays Ltd IM00028...
Page 112 Y-connected vector diagram. The images below present the differential algorithm itself (one calculating formula for each phase difference); first the "subtract" formulas, then the "add" formulas. Selection is based on the CT connections. © Arcteq Relays Ltd IM00028...
Page 113 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 5.3.10 - 55. "Subtract" formula. Figure. 5.3.10 - 56. "Add" formula. Figure. 5.3.10 - 57. CTs' starpoints requiring the "Add" mode. © Arcteq Relays Ltd IM00028...
Page 114 Next, these two formulas are combined in a graph: the x-axis presents the measured differential current, and the y-axis presents the calculated bias current. The following graph shows the differential function characteristic, both biased and non-biased. © Arcteq Relays Ltd IM00028...
Page 115 ). It is the basic sensitivity limit: when the measured differential current is below this limit, the d>pick-up transformer still operates normally and the protection does not trigger. In other words, the pick-up current setting must be higher than the combination of all the normal operation factors that cause differential currents. © Arcteq Relays Ltd IM00028...
Page 116 3) Relay measurement accuracy (primary and secondary) (RE The relay measurement error is below 0.5 %, its optional accuracy below 0.2 % per measurement channel: the combined value for both sides is either 1 % or 0.4 %. © Arcteq Relays Ltd IM00028...
Page 117 This causes a difference in the nominal current condition, which can be noticed as a differential current in the relay. Usually tap changer positions are presented as deviation steps for the secondary voltage to both positive and negative direction from the center (see the second image below). © Arcteq Relays Ltd IM00028...
Page 118 If there is no tap changer, the maximum uncertainty can be calculated sufficiently enough by summing the maximum inaccuracies of the CTs on the HV and LV sides. © Arcteq Relays Ltd IM00028...
Page 119 Slope 1 is calculated by using the transformer and CT nominal values in the maximum full load (Turnpoint 2) of the transformer with highest possible differential current causing tap position. Generally the Slope 1 setting is calculated as follows: © Arcteq Relays Ltd IM00028...
Page 120 CTs differently (starpoint towards or away from the transformer). Thus, the differential current is always calculated as follows: © Arcteq Relays Ltd IM00028...
Page 121 Therefore, the differential current is the following: If the Maximum mode is used for biasing (due to a single end fault), the bias current is the same as the differential current. Therefore, the Slope 2 setting is calculated as follows: © Arcteq Relays Ltd IM00028...
Page 122 CTs, the connection between the CTs, as well as the cross-section and material of the wires. Let us begin with the burden the wiring causes to the relay, and calculate the resistance in a conductor: © Arcteq Relays Ltd IM00028...
Page 123 It is recommended that you use the worst-case scenario as the basis for calculating the CT burden. In most cases these +75 ºC values are sufficient. If the ambient temperature in your application is higher than +75 ºC, the resistance should be calculated for that specific temperature. © Arcteq Relays Ltd IM00028...
Page 124 If the CTs have the possibility to saturate (that is, the calculated through fault current is bigger than the ALF on either CT side), the setting of the instant stage must be set high enough so that it does not operate on through fault saturation. © Arcteq Relays Ltd IM00028...
Page 125 (using these same formulas) in the Transformer status monitoring (TRF) module. When everything is set up correctly in the relay and when the transformer is feeding the load with nominal power, the result should look like the following example configuration when the example settings and transformer are used. © Arcteq Relays Ltd IM00028...
Page 126 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 5.3.10 - 64. Example configuration for the transformer differential function. © Arcteq Relays Ltd IM00028...
Page 127 Our example presented only one type of transformer and its properties. Another very common variation is the type of transformer where the star side (HV, LV, or both) is earthed and thus forms a route outside the differential zone (see the image below). © Arcteq Relays Ltd IM00028...
Page 128 (in p.u.) before differential calculation and thus negates the effect of an external earth fault. Correctly selected transformer settings prevent the differential function from being tripped by out-of-zone earth faults (see the image below). © Arcteq Relays Ltd IM00028...
Page 129 However, enabling the REF protection requires that both the phase current measurements and the starpoint current are available and can be connected to the relay's residual current channel on the corresponding (HV/LV) side measurement. © Arcteq Relays Ltd IM00028...
Page 130 (external) earth faults, and the how a heavy fault going fully through the second biased section (Slope 2) can cause saturation in the CTs' phase currents. The recommended base settings: • Pick-up (base sensitivity): typically 5 % to 10 % of the phase current CT error (Px) © Arcteq Relays Ltd IM00028...
Page 131 The differential relay sees the energization current as a differential current since it only flows through the primary side winding only. The saturation of the transformer core generates the 2 harmonic component which can be used to block the biased sensitive differential stage during energization. © Arcteq Relays Ltd IM00028...
Page 132 (in amperes), the fourth graph depicts the fundamental (50 Hz) FFT- calculated currents (in amperes), and fifth graph depicts the 2 harmonic components relative to the corresponding fundamental component currents (with the 15 % setting limit). © Arcteq Relays Ltd IM00028...
Page 133 While the results are very low compared to the magnetizing inrush current magnitudes, the differential relay would still definitely trip without the 2 harmonic blocking. The situation is the same with all of the calculted setting variations. © Arcteq Relays Ltd IM00028...
Page 134 Figure. 5.3.10 - 70. Inrush blocking by using the 2 harmonic (relative to fundamental frequency). Figure. 5.3.10 - 71. Example of transformer magnetizing inrush currents. A conservative setting recommendation for standard type transformers: • enabling the 2 harmonic blocking © Arcteq Relays Ltd IM00028...
Page 135 Figure. 5.3.10 - 72. Transformer behavior in case of overvoltage caused by overexcitation. © Arcteq Relays Ltd IM00028...
Page 136 The figures below present the system voltage and the magnitude of the 5 harmonic component (both in per-unit), absolute and scaled to the transformer nominal. © Arcteq Relays Ltd IM00028...
Page 137 (that is, no overvoltage relays are available), this blocking can be enabled with the setting of 30...40 % with the disturbance recorder enabled. If a trip occurs as a result of overexcitation, the settings can be adjusted based on the data captured by the disturbance recorder. © Arcteq Relays Ltd IM00028...
Page 138 HV and the LV side. HV side The HV side nominal voltage of the transformer. This nominal 0.1…500.0kV 0.1kV 110.0kV value is used to calculate the nominal currents of the voltage HV side. © Arcteq Relays Ltd IM00028...
Page 139 LV side current grounded monitoring grounded grounded calculation. The selection is visible only if the option 1: Grounded - transformer "Manual set" is selected for the vector group setting. differential © Arcteq Relays Ltd IM00028...
Page 140 Idb> Pick- 0.01…100.00% 0.01% 10.00% The base sensitivity for the differential characteristics. Turnpoint 0.01…50.00×I 0.01×I 1.00×I Turnpoint 1 for the differential characteristics. Slope 1 0.01…250.00% 0.01% 10.00% Slope 1 for the differential characteristics. © Arcteq Relays Ltd IM00028...
Page 141 LV side" setting is enabled. Slope 2 of the LV side restricted earth fault differential LV I0d> 0.01…250.00% 0.01% 200.00% characteristics. This setting is only visible if the "Enable I0d> (REF) Slope 2 LV side" setting is enabled. © Arcteq Relays Ltd IM00028...
Page 142 The data register is available, based on the changes in the tripping events. Table. 5.3.10 - 89. Event messages. Event block name Event names DIF1 Idb> Trip ON DIF1 Idb> Trip OFF DIF1 Idb> Blocked (ext) ON © Arcteq Relays Ltd IM00028...
Page 143 The function registers its operation into the last twelve (12) time-stamped registers. The table below presents the structure of the function's register content. Table. 5.3.10 - 90. Register content. Name Description Date and time dd.mm.yyyy hh:mm:ss.mss Event Event name © Arcteq Relays Ltd IM00028...
Page 144: Resistance Temperature Detectors
(2) separate alarms from one selected input. The user can set alarms and measurements to be either in degrees Celsius or Fahrenheit. The following figure shows the principal structure of the resistance temperature detection function. © Arcteq Relays Ltd IM00028...
Page 145 When using a thermocouple module, the thermo element type also needs to be set for each of the measurement channels. Once these settings are done the RTDs are ready for other functions. © Arcteq Relays Ltd IM00028...
Page 146 There are sixteen (16) available sensor inputs in the function. An active alarm requires a valid channel measurement. It can be invalid if communication is not working or if a sensor is broken. © Arcteq Relays Ltd IM00028...
Page 147 Enables/disables the selection of Alarm 2 for the 0: Disable 1: Enable measurement channel x. 0: > Selects whether the measurement is above or S1...S16 Alarm2 >/< 0: > 1: < below the setting value. © Arcteq Relays Ltd IM00028...
Page 148 S4 Alarm2 OFF RTD1 S5 Alarm1 ON RTD1 S5 Alarm1 OFF RTD1 S5 Alarm2 ON RTD1 S5 Alarm2 OFF RTD1 S6 Alarm1 ON RTD1 S6 Alarm1 OFF RTD1 S6 Alarm2 ON RTD1 S6 Alarm2 OFF © Arcteq Relays Ltd IM00028...
Page 149 S14 Alarm1 OFF RTD1 S14 Alarm2 ON RTD1 S14 Alarm2 OFF RTD1 S15 Alarm1 ON RTD1 S15 Alarm1 OFF RTD1 S15 Alarm2 ON RTD1 S15 Alarm2 OFF RTD1 S16 Alarm1 ON RTD1 S16 Alarm1 OFF © Arcteq Relays Ltd IM00028...
Page 150 S12 Meas Invalid RTD2 S13 Meas Ok RTD2 S13 Meas Invalid RTD2 S14 Meas Ok RTD2 S14 Meas Invalid RTD2 S15 Meas Ok RTD2 S15 Meas Invalid RTD2 S16 Meas Ok RTD2 S16 Meas Invalid © Arcteq Relays Ltd IM00028...
Page 151: Arc Fault Protection (Iarc>/I0Arc>; 50Arc/50Narc)
The arc protection card has four (4) sensor channels, and up to three (3) arc point sensors can be connected to each channel. The sensor channels support Arcteq AQ-01 (light sensing) and AQ-02 (pressure and light sensing) units. Optionally, the protection function can also be applied with a phase current or a residual current condition: the function trips only if the light and overcurrent conditions are met.
Page 152 26 output signals. The time stamp resolution is 1 ms. The function also a resettable cumulative counter for the TRIP and BLOCKED events for each zone. © Arcteq Relays Ltd IM00028...
Page 153 AQ-100 series units. The parameter I/I0 Arc> Self supervision test pulse should be activated when connecting the AQ-100 series units to the AQ-200 series arc protection card to prevent the pulses from activating ArcBI1. © Arcteq Relays Ltd IM00028...
Page 154 If either phase overcurrent or residual overcurrent is needed for the tripping decision, they can be enabled in the same way as light sensors in the zone. When a current channel is enabled, the measured current needs to be above the set current limit in addition to light sensing. © Arcteq Relays Ltd IM00028...
Page 155 Table. 5.3.12 - 96. Enabled Zone pick-up settings. Name Description Range Step Default Phase 0.05...40.00 0.01 current The phase current measurement's pick-up value (in p.u.). 1.2 x I pick-up © Arcteq Relays Ltd IM00028...
Page 156 HMI display, or through the setting tool software when it is connected to the relay and its Live Edit mode is active. Table. 5.3.12 - 97. Information displayed by the function. Name Range Description © Arcteq Relays Ltd IM00028...
Page 157 START, TRIP, and BLOCKED. The user can select which event messages are stored in the main event buffer: ON, OFF, or both. The events triggered by the function are recorded with a time stamp and with process data values. © Arcteq Relays Ltd IM00028...
Page 158 ARC1 Channel 2 Pressure ON ARC1 Channel 2 Pressure OFF ARC1 Channel 3 Light ON ARC1 Channel 3 Light OFF ARC1 Channel 3 Pressure ON ARC1 Channel 3 Pressure OFF ARC1 Channel 4 Light ON © Arcteq Relays Ltd IM00028...
Page 159: Programmable Stage (Pgx>/<; 99)
(10) depending on how many the application needs. In the image below, the number of programmable stages have been set to two which makes PS1 and PS2 to appear. Inactive stages are hidden until they are activated. © Arcteq Relays Ltd IM00028...
Page 160 2: Blocked Displays the mode of PGS block. PSx >/< LN 3: Test This parameter is visible only when Allow setting of individual LN mode is behaviour 4: Test/ enabled in General menu. Blocked 5: Off © Arcteq Relays Ltd IM00028...
Page 161 Divides Signal 1 by Signal 2. The comparison uses the product of this calculation. 2: Max (Mag1, The bigger value of the chosen signals is used in the comparison. Mag2) 3: Min (Mag1, The smaller value of the chosen signals is used in the comparison. Mag2) © Arcteq Relays Ltd IM00028...
Page 162 2: Min (Mag1, Mag2, Mag3) The smallest value of the chosen signals is used in the comparison. 3: Mag1 OR Mag2 OR Mag3 Any of the signals fulfills the pick-up condition. Each signal has their own pick-up setting. © Arcteq Relays Ltd IM00028...
Page 163 Signal 1 or Signal 2 as well as Signal 3 fulfill the pick-up condition. The settings for different comparisons are in the setting groups. This means that each signal parameter can be changed by changing the setting group. © Arcteq Relays Ltd IM00028...
Page 164 (in p.u.) IL1 7 IL1 7 harmonic value (in p.u.) IL1 9 IL1 9 harmonic value (in p.u.) IL1 11 IL1 11 harmonic value (in p.u.) IL1 13 IL1 13 harmonic value (in p.u.) © Arcteq Relays Ltd IM00028...
Page 165 Description I01 ff (p.u.) I01 Fundamental frequency RMS value (in p.u.) I01 2 I01 2 harmonic value (in p.u.) I01 3 I01 3 harmonic value (in p.u.) I01 4 I01 4 harmonic value (in p.u.) © Arcteq Relays Ltd IM00028...
Page 166 Positive sequence current value (in p.u.) I2 Mag Negative sequence current value (in p.u.) IL1 Ang IL1 angle of current IL2 Ang IL2 angle of current IL3 Ang IL3 angle of current I01 Ang I01 angle of current © Arcteq Relays Ltd IM00028...
Page 167 Positive sequence voltage U2 neg.seq.V Mag Negative sequence voltage U0CalcAng Calculated residual voltage angle U1 pos.seq.V Ang Positive sequence voltage angle U2 neg.seq.V Ang Negative sequence voltage angle P P o o w w ers © Arcteq Relays Ltd IM00028...
Page 168 Reactance X L23 secondary (Ω) RL31Sec Resistance R L31 secondary (Ω) XL31Sec Reactance X L31 secondary (Ω) Z12Pri Impedance Z L12 primary (Ω) Z23Pri Impedance Z L23 primary (Ω) Z31Pri Impedance Z L31 primary (Ω) © Arcteq Relays Ltd IM00028...
Page 169 ZSeqSec Positive Impedance Z secondary (Ω) ZSeqAngle Positive Impedance Z angle GL1Pri Conductance G L1 primary (mS) BL1Pri Susceptance B L1 primary (mS) GL2Pri Conductance G L2 primary (mS) BL2Pri Susceptance B L2 primary (mS) © Arcteq Relays Ltd IM00028...
Page 170 Transformer thermal temperature RTD meas 1…16 RTD measurement channels 1…16 Ext RTD meas 1…8 External RTD measurement channels 1…8 (ADAM) mA input 7,8,15,16 mA input channels 7, 8, 15, 16 ASC 1…4 Analog scaled curves 1…4 © Arcteq Relays Ltd IM00028...
Page 171 If the START function has been activated before the blocking signal, it resets and the release time characteristics are processed similarly to when the pick- up signal is reset. © Arcteq Relays Ltd IM00028...
Page 172 PGS1 PS4 >/< Start ON PGS1 PS4 >/< Start OFF PGS1 PS4 >/< Trip ON PGS1 PS4 >/< Trip OFF PGS1 PS4 >/< Block ON PGS1 PS4 >/< Block OFF PGS1 PS5 >/< Start ON © Arcteq Relays Ltd IM00028...
Page 173 PGS1 PS9 >/< Block OFF PGS1 PS10 >/< Start ON PGS1 PS10 >/< Start OFF PGS1 PS10 >/< Trip ON PGS1 PS10 >/< Trip OFF PGS1 PS10 >/< Block ON PGS1 PS10 >/< Block OFF © Arcteq Relays Ltd IM00028...
Page 174: Control Functions
Control → Setting groups . When the forcing parameter is enabled, the automatic control of the local device is overridden and the full control of the setting groups is given to the user until the "Force SG change" is disabled again. © Arcteq Relays Ltd IM00028...
Page 175 Disabled from a local HMI. This parameter overrides the local control of the setting Enabled groups and it remains on until the user disables it. © Arcteq Relays Ltd IM00028...
Page 176 0: Not control. Can be controlled with pulses or static signals. If static signal control is applied, group active all other SG requests will be processed regardless of the signal status of this setting Active group. © Arcteq Relays Ltd IM00028...
Page 177 The status of the Petersen coil controls whether Setting group 1 is active. If the coil is disconnected, Setting group 2 is active. This way, if the wire is broken for some reason, the setting group is always controlled to SG2. © Arcteq Relays Ltd IM00028...
Page 178 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 5.4.1 - 83. Setting group control – two-wire connection from Petersen coil status. © Arcteq Relays Ltd IM00028...
Page 179 The application-controlled setting group change can also be applied entirely from the relay's internal logics. For example, the setting group change can be based on the cold load pick-up function (see the image below). © Arcteq Relays Ltd IM00028...
Page 180 The function does not have a register. Table. 5.4.1 - 106. Event messages. Event block name Event names SG2 Enabled SG2 Disabled SG3 Enabled SG3 Disabled SG4 Enabled SG4 Disabled SG5 Enabled SG5 Disabled © Arcteq Relays Ltd IM00028...
Page 181 Force Request Fail Force ON Force Request Fail Force OFF SG Req. Fail Lower priority Request ON SG Req. Fail Lower priority Request OFF SG1 Active ON SG1 Active OFF SG2 Active ON SG2 Active OFF © Arcteq Relays Ltd IM00028...
Page 182: Object Control And Monitoring
• digital input status indications (the OPEN and CLOSE status signals) • blockings (if applicable) • the OBJECT READY and SYNCHROCHECK monitor signals (if applicable). • Withdrawable cart IN and OUT status signals (if applicable). © Arcteq Relays Ltd IM00028...
Page 183 Circuit 2: Disconnector withdrawable cart is in/out status is monitored. See the next table ("Object breaker (MC) types") for a more detailed look at which functionalities each of the object types 3: Disconnector have. (GND) © Arcteq Relays Ltd IM00028...
Page 184 Functionalities Description Breaker cart position Circuit breaker position Circuit breaker control Withdrawable circuit Object ready check before closing The monitor and control configuration of the withdrawable breaker breaker circuit breaker. Synchrochecking before closing breaker Interlocks © Arcteq Relays Ltd IM00028...
Page 185 Determines the maximum length for a Close pulse from the output relay to the 0.02…500.00 0.02 command 0.2 s controlled object. If the object operates faster than this set time, the control pulse pulse is reset and a status change is detected. length © Arcteq Relays Ltd IM00028...
Page 186 Blocking and interlocking can be based on any of the following: other object statuses, a software function or a digital input. The image below presents an example of an interlock application, where the closed earthing switch interlocks the circuit breaker close command. © Arcteq Relays Ltd IM00028...
Page 187 The user can select which event messages are stored in the main event buffer: ON, OFF, or both. The function registers its operation into the last twelve (12) time-stamped registers. The events triggered by the function are recorded with a time stamp and with process data values. © Arcteq Relays Ltd IM00028...
Page 188 Final trip ON OBJ1 Final trip OFF OBJ2 Object Intermediate OBJ2 Object Open OBJ2 Object Close OBJ2 Object Bad OBJ2 WD Intermediate OBJ2 WD Out OBJ2 WD In OBJ2 WD Bad OBJ2 Open Request ON © Arcteq Relays Ltd IM00028...
Page 189 Open Command ON OBJ3 Open Command OFF OBJ3 Close Request ON OBJ3 Close Request OFF OBJ3 Close Command ON OBJ3 Close Command OFF OBJ3 Open Blocked ON OBJ3 Open Blocked OFF OBJ3 Close Blocked ON © Arcteq Relays Ltd IM00028...
Page 190 Close Blocked OFF OBJ4 Object Ready OBJ4 Object Not Ready OBJ4 Sync Ok OBJ4 Sync Not Ok OBJ4 Open Command Fail OBJ4 Close Command Fail OBJ4 Final trip ON OBJ4 Final trip OFF OBJ5 Object Intermediate © Arcteq Relays Ltd IM00028...
Page 191 Object Intermediate OBJ6 Object Open OBJ6 Object Close OBJ6 Object Bad OBJ6 WD Intermediate OBJ6 WD Out OBJ6 WD In OBJ6 WD Bad OBJ6 Open Request ON OBJ6 Open Request OFF OBJ6 Open Command ON © Arcteq Relays Ltd IM00028...
Page 192 OBJ7 Close Request ON OBJ7 Close Request OFF OBJ7 Close Command ON OBJ7 Close Command OFF OBJ7 Open Blocked ON OBJ7 Open Blocked OFF OBJ7 Close Blocked ON OBJ7 Close Blocked OFF OBJ7 Object Ready © Arcteq Relays Ltd IM00028...
Page 193 Object Not Ready OBJ8 Sync Ok OBJ8 Sync Not Ok OBJ8 Open Command Fail OBJ8 Close Command Fail OBJ8 Final trip ON OBJ8 Final trip OFF OBJ9 Object Intermediate OBJ9 Object Open OBJ9 Object Close © Arcteq Relays Ltd IM00028...
Page 194 OBJ10 Object Bad OBJ10 WD Intermediate OBJ10 WD Out OBJ10 WD In OBJ10 WD Bad OBJ10 Open Request ON OBJ10 Open Request OFF OBJ10 Open Command ON OBJ10 Open Command OFF OBJ10 Close Request ON © Arcteq Relays Ltd IM00028...
Page 195: Indicator Object Monitoring
(2) digital inputs. Alternatively, object status monitoring can be performed with a single digital input: the input's active state and its zero state (switched to 1 with a NOT gate in the Logic editor). © Arcteq Relays Ltd IM00028...
Page 196 ON, OFF, or both. Table. 5.4.3 - 116. Event messages (instances 1-10). Event block name Event names CIN1 Intermediate CIN1 Open CIN1 Close CIN1 CIN2 Intermediate © Arcteq Relays Ltd IM00028...
Page 197 CIN6 Intermediate CIN6 Open CIN6 Close CIN6 CIN7 Intermediate CIN7 Open CIN7 Close CIN7 CIN8 Intermediate CIN8 Open CIN8 Close CIN8 CIN9 Intermediate CIN9 Open CIN9 Close CIN9 CIN10 Intermediate CIN10 Open CIN10 Close CIN10 © Arcteq Relays Ltd IM00028...
Page 198: Milliampere Output Control
0: Currents Magnitude 1: Voltages selection for 2: Powers Defines the measurement category that is used for mA 0: Currents mA output 3: Impedance and output control. channel admittance 4: Other © Arcteq Relays Ltd IM00028...
Page 199 Table. 5.4.4 - 120. Measurement values reported by mA output cards. Name Range Step Description mA in Channel 1 Displays the measured mA value of the selected input 0.0000…24.0000mA 0.0001mA channel. mA in Channel 2 © Arcteq Relays Ltd IM00028...
Page 200: Programmable Control Switch
ON, OFF, or both. The function offers five (5) independent switches. Table. 5.4.5 - 122. Event messages. Event block name Event names Switch 1 ON Switch 1 OFF Switch 2 ON Switch 2 OFF Switch 3 ON Switch 3 OFF © Arcteq Relays Ltd IM00028...
Page 201: Analog Input Scaling Curves
"ASC1...4 input out of range" signal is 1: Yes activated. -1 000 Curve1...4 input Defines the minimum input of the curve. If input is below the 000.00...1 000 0.00001 0 minimum set limit, "ASC1...4 input out of range" is activated. 000.00 © Arcteq Relays Ltd IM00028...
Page 202 If for some reason the input signal is lost, the value is fixed to the last actual measured cycle value. The value does not go down to the minimum if it has been something else at the time of the signal breaking. © Arcteq Relays Ltd IM00028...
Page 203: Logical Outputs
5 ("OUT5") when the circuit breaker's cart status is "In". The image above is from the logic editor and the image below from AQtivate 200. © Arcteq Relays Ltd IM00028...
Page 204: Logical Inputs
"Pulse" mode is controlled to "1", the input will switch to status "1" and return back to "0" after 5 ms. The figure below presents the operation of a logical input in Hold mode and in Pulse mode. © Arcteq Relays Ltd IM00028...
Page 205: Monitoring Functions
CTs as well as the wirings between the device and the CT inputs for malfunctions and wire breaks. An open CT circuit can generate dangerously high voltages into the CT secondary side, and cause unintended activations of current balance monitoring functions. © Arcteq Relays Ltd IM00028...
Page 206 • The calculated difference (IL1+IL2+IL3+I0) exceeds the I difference setting (optional). • The above-mentioned condition is met until the set time delay for alarm. The inputs of the function are the following: • setting parameters • measured and pre-processed current magnitudes. © Arcteq Relays Ltd IM00028...
Page 207 The function block uses analog current measurement values, the RMS magnitude of the current measurement inputs, and the calculated positive and negative sequence currents. The user can select what is used for the residual current measurement: nothing, the I01 RMS measurement, or the I02 RMS measurement. © Arcteq Relays Ltd IM00028...
Page 208 0: Add Defines the polarity of residual current channel connection. Subtract 0: - Compensate natural When activated while the line is energized, the currently present calculated 0: - unbalance residual current is compensated to 0. Comp © Arcteq Relays Ltd IM00028...
Page 209 The relay's Info page displays useful, real-time information on the state of the protection function. It is accessed either through the relay's HMI display, or through the setting tool software when it is connected to the relay and its Live Edit mode is active. © Arcteq Relays Ltd IM00028...
Page 210 "General properties of a protection function" and its section "Operating time characteristics for trip and reset". Typical cases of current transformer supervision The following nine examples present some typical cases of the current transformer supervision and their setting effects. © Arcteq Relays Ltd IM00028...
Page 211 Figure. 5.5.1 - 96. Secondary circuit fault in phase L1 wiring. When a fault is detected and all conditions are met, the CTS timer starts counting. If the situation continues until the set time has passed, the function issues an alarm. © Arcteq Relays Ltd IM00028...
Page 212 If any of the phases exceed the I high limit setting, the operation of the function is not activated. This behavior is applied to short-circuits and earth faults even when the fault current exceeds the I high limit setting. © Arcteq Relays Ltd IM00028...
Page 213 Figure. 5.5.1 - 100. Normal situation, residual current also measured. When the residual condition is added with the "I0 input selection", the sum of the current and the residual current are compared against each other to verify the wiring condition. © Arcteq Relays Ltd IM00028...
Page 214 Figure. 5.5.1 - 102. Broken primary phase current wiring. In this example, all other condition are met except the residual difference. That is now 0 × I , which indicates a primary side fault. © Arcteq Relays Ltd IM00028...
Page 215 The function registers its operation into the last twelve (12) time-stamped registers; this information is available for all provided instances separately. The register of the function records the ON event process data for ACTIVATED, BLOCKED, etc. The table below presents the structure of the function's register content. © Arcteq Relays Ltd IM00028...
Page 216: Circuit Breaker Wear
The time stamp resolution is 1 ms. The function also provides a resettable cumulative counter for the "Open" operations as well as the ALARM 1 and ALARM 2 events. The function can also monitor the operations left for each phase. © Arcteq Relays Ltd IM00028...
Page 217 The circuit breaker characteristics are set by two operating points, defined by the nominal breaking current, the maximum allowed breaking current and their respective operation settings. This data is provided by the circuit breaker's manufacturer. © Arcteq Relays Ltd IM00028...
Page 218 Let us examine the settings, using a low-duty vacuum circuit breaker (ISM25_LD_1/3) manufactured by Tavrida as an example. The image below presents the technical specifications provided by the manufacturer, with the data relevant to our settings highlighted in red: © Arcteq Relays Ltd IM00028...
Page 219 With these settings, Alarm 1 is issued when the cumulative interruption counter for any of the three phases dips below the set 1000 remaining operations ("Alarm 1 Set"). Similarly, when any of the counters dips below 100 remaining operations, Alarm 2 is issued. © Arcteq Relays Ltd IM00028...
Page 220 CBWEAR1 Alarm 2 OFF The function registers its operation into the last twelve (12) time-stamped registers. The register of the function records the ON event process data. The table below presents the structure of the function's register content. © Arcteq Relays Ltd IM00028...
Page 221: Total Harmonic Distortion (Thd)
(8) separate setting groups which can be selected from one common source. The operational logic consists of the following: • input magnitude processing • threshold comparator • block signal chec • time delay characteristics • output processing. The inputs of the function are the following: © Arcteq Relays Ltd IM00028...
Page 222 The selection of the calculation method is made with a setting parameter (common for all measurement channels). General settings The following general settings define the general behavior of the function. These settings are static i.e. it is not possible to change them by editing the setting group. © Arcteq Relays Ltd IM00028...
Page 223 The relay's Info page displays useful, real-time information on the state of the protection function. It is accessed either through the relay's HMI display, or through the setting tool software when it is connected to the relay and its Live Edit mode is active. © Arcteq Relays Ltd IM00028...
Page 224 Defines the delay for the alarm timer from the residual current 0.000…1800.000s 0.005s 10.000s delay I01's measured THD. I02 THD alarm Defines the delay for the alarm timer from the residual current 0.000…1800.000s 0.005s 10.000s delay I02's measured THD. © Arcteq Relays Ltd IM00028...
Page 225: Disturbance Recorder (Dr)
The maximum sample rate of the recorder's analog channels is 64 samples per cycle. The recorder also supports 95 digital channels simultaneously with the twenty (20) measured analog channels. Maximum capacity of recordings is 100. © Arcteq Relays Ltd IM00028...
Page 226 Voltage measurement module voltage supply supervision (VT card 2) Phase current I (CT card 3) IL1''' IL2''' Phase current I (CT card 3) Phase current I (CT card 3) IL3''' Residual current I coarse* (CT card 3) I01'''c © Arcteq Relays Ltd IM00028...
Page 227 Pha.Lx pow. THD Phase Lx power THD (L1, L2, L3) calc.I0 Calculated I0 Res.I0x ampl. THD Residual I0x amplitude THD (I01, I02) calc.I0 Pha.angle Calculated I0 phase angle Res.I0x pow. THD Residual I0x power THD (I01, I02) © Arcteq Relays Ltd IM00028...
Page 228 Current Pri. (IL1, IL2, IL3) Current Sec. (I01, I02) ILx Reactive Primary reactive current ILx I0x Residual Reactive Secondary residual reactive current I0x Current Pri. (IL1, IL2, IL3) Current Sec. (I01, I02) Power, GYB, frequency © Arcteq Relays Ltd IM00028...
Page 229 Internal Relay Fault active front panel are pressed. is active. buttons Status (Protection, control and (see the individual function description for PushButton x Status of Push Button 1...12 is ON monitoring event signals) the specific outputs) © Arcteq Relays Ltd IM00028...
Page 230 Manual 0: - Triggers disturbance recording manually. This parameter will return 0: - trigger 1: Trig back to "-" automatically. Clear all 0: - 0: - Clears all disturbance recordings. records 1: Clear © Arcteq Relays Ltd IM00028...
Page 231 Sets the recording length before the trigger. time 0…8 freely Selects the analog channel for recording. Please see the list of all Analog recording selectable available analog channels in the section titled "Analog and digital CH1...CH20 channels recording channels". © Arcteq Relays Ltd IM00028...
Page 232 For example, let us say the nominal frequency is 50 Hz, the selected sample rate is 64 s/c, nine (9) analog channels and two (2) digital channels record. The calculation is as follows: Therefore, the maximum recording length in our example is approximately 496 seconds. © Arcteq Relays Ltd IM00028...
Page 233 The recorder is configured by using the setting tool software or relay HMI, and the results are analyzed with the AQviewer software (is automatically downloaded and installed with AQtivate). Registered users can download the latest tools from the Arcteq website (arcteq.fi./downloads/).
Page 234 Once clicked, the "Add graph" pop-up window appears (see the image below on the right). In the example the line-to-neutral voltages UL1, UL2 and UL3 are selected and moved to the window on the right. Confirm the selection by clicking the "OK" button. © Arcteq Relays Ltd IM00028...
Page 235 (manually or by dedicated signals). Events cannot be masked off. The user can select which event messages are stored in the main event buffer: ON, OFF, or both. © Arcteq Relays Ltd IM00028...
Page 236: Measurement Recorder
Recorder triggered ON Recorder triggered OFF Recorder memory cleared Oldest record cleared Recorder memory full ON Recorder memory full OFF Recording ON Recording OFF Storing recording ON Storing recording OFF Newest record cleared 5.5.5 Measurement recorder © Arcteq Relays Ltd IM00028...
Page 237 Pha.angle I”L1 L1 Exp/Imp React.Ind.E.bal.kvarh Pri.Res.Curr.I01 Pha.angle I”L2 L2 Exp.Active Energy MWh Pri.Res.Curr.I02 Pha.angle I”L3 L2 Exp.Active Energy kWh Pri.Calc.I0 Res.Curr.angle I”01 L2 Imp.Active Energy MWh Pha.Curr.IL1 TRMS Pri Res.Curr.angle I”02 L2 Imp.Active Energy kWh © Arcteq Relays Ltd IM00028...
Page 238 Imp.Active Energy MWh Pha.L1 ampl. THD Pos.Seq.Volt. p.u. Imp.Active Energy kWh Pha.L2 ampl. THD Neg.Seq.Volt. p.u. Exp/Imp Act. E balance MWh Pha.L3 ampl. THD Zero.Seq.Volt. p.u. Exp/Imp Act. E balance kWh Pha.L1 pow. THD U1Volt Angle Exp.React.Cap.E.Mvarh © Arcteq Relays Ltd IM00028...
Page 239 Sec.Pha.Curr.I”L1 System Volt U0 ang S7 Measurement Sec.Pha.Curr.I”L2 System Volt U1 ang S8 Measurement Sec.Pha.Curr.I”L3 System Volt U2 ang S9 Measurement Sec.Res.Curr.I”01 System Volt U3 ang S10 Measurement Sec.Res.Curr.I”02 System Volt U4 ang S11 Measurement © Arcteq Relays Ltd IM00028...
Page 240 Res.I”01 pow. THD L1 Imp.React.Cap.E.Mvarh Curve4 Output Res.I”02 ampl. THD L1 Imp.React.Cap.E.kvarh Control mode Res.I”02 pow. THD L1 Exp/Imp React.Cap.E.bal.Mvarh Motor status P-P Curr.I”L1 L1 Exp/Imp React.Cap.E.bal.kvarh Active setting group P-P Curr.I”L2 L1 Exp.React.Ind.E.Mvarh L1 Exp.React.Ind.E.kvarh © Arcteq Relays Ltd IM00028...
Page 241: Measurement Value Recorder
The angles of each measured current. I1Ang, I2Ang V V olta oltages Descrip Description tion UL1Mag, UL2Mag, UL3Mag, UL12Mag, UL23Mag, UL31Mag The magnitudes of phase voltages, of phase-to-phase voltages, and of residual voltages. U0Mag, U0CalcMag © Arcteq Relays Ltd IM00028...
Page 242 Reported values When triggered, the function holds the recorded values of up to eight channels, as set. In addition to this tripped stage, the overcurrent fault type and the voltage fault types are reported to SCADA. © Arcteq Relays Ltd IM00028...
Page 243 45: U0> Trip 46: U0>> Trip 47: U0>>> Trip 48: U0>>>> Trip 0: - 1: A-G 2: B-G 3: A-B Overcurrent fault type The overcurrent fault type. 4: C-G 5: A-C 6: B-C 7: A-B-C © Arcteq Relays Ltd IM00028...
Page 244 The user can select which event messages are stored in the main event buffer: ON, OFF, or both. Table. 5.5.6 - 157. Event messages. Event block name Event name VREC1 Recorder triggered ON VREC1 Recorder triggered OFF © Arcteq Relays Ltd IM00028...
Page 245: Sy Y St Stem Int 6 S Em Integra Egration Tion
• Write multiple holding registers (function code 16) • Read/Write multiple registers (function code 23) The following data can be accessed using both Modbus/TCP and Modbus/RTU: • Device measurements • Device I/O • Commands • Events • Time © Arcteq Relays Ltd IM00028...
Page 246: Modbus I/O
Defines the Modbus unit address for the selected I/O Module (A, B, or C). If this setting 0…247 address is set to "0", the selected module is not in use. Module x 0: ADAM-4018+ Selects the module type. type 1: ADAM-4015 © Arcteq Relays Ltd IM00028...
Page 247: Iec 61850
AQ-25x frame units support both Edition 1 and 2 of IEC61850. The following services are supported by IEC 61850 in Arcteq devices: • Up to six data sets (predefined data sets can be edited with the IEC 61850 tool in AQtivate) •...
Page 248: Goose
→ AQ-200 series → Resources). 6.1.5 GOOSE Arcteq relays support both GOOSE publisher and GOOSE subscriber. GOOSE subscriber is enabled with the "GOOSE subscriber enable" parameter at Communication → Protocols → IEC 61850/ GOOSE. The GOOSE inputs are configured using either the local HMI or the AQtivate software.
Page 249: Iec 103
(slave) station. The IEC 103 protocol can be selected for the serial ports that are available in the device. A primary (master) station can then communicate with the Arcteq device and receive information by polling from the slave device. The transfer of disturbance recordings is not supported.
Page 250: Dnp3
Selects the variation of the double point signal. 1: Var 2 0: Var 1 1: Var 2 Group 20 variation (CNTR) 0: Var 1 Selects the variation of the control signal. 2: Var 5 3: Var 6 © Arcteq Relays Ltd IM00028...
Page 251 Determines the data reporting deadband settings for this 0.01…5000.00V 0.01V 200V voltage deadband measurement. Angle Determines the data reporting deadband settings for this 0.1…5.0deg 0.1deg 1deg measurement deadband measurement. Integration time 0…10 000ms Displays the integration time of the protocol. © Arcteq Relays Ltd IM00028...
Page 252: Iec 101/104
The measurement scaling coefficients are available for the following measurements, in addition to the general measurement scaling coefficient: • Active energy • Reactive energy • Active power • Reactive power • Apparent power • Power factor • Frequency © Arcteq Relays Ltd IM00028...
Page 253 Determines the data reporting deadband settings for this 0.01…5000.00V 0.01V 200V voltage deadband measurement. Angle Determines the data reporting deadband settings for this 0.1…5.0deg 0.1deg 1deg measurement deadband measurement. Integration time 0…10 000ms Displays the integration time of the protocol. © Arcteq Relays Ltd IM00028...
Page 254: Spa
With the Real-time signals to communication menu the user can report to SCADA measurements that are not normally available in the communication protocols mapping. Up to eight (8) magnitudes can be selected. The recorded value can be either a per-unit value or a primary value (set by the user). © Arcteq Relays Ltd IM00028...
Page 255 Cos (φ) of three-phase powers and phase powers. cosfiL2 cosfiL3 Impedances and admittances RL12, RL23, RL31 XL12, XL23, XL31 RL1, RL2, RL3 XL1, XL2, XL3 Phase-to-phase and phase-to-neutral resistances, reactances and impedances. Z12, Z23, Z31 ZL1, ZL2, ZL3 © Arcteq Relays Ltd IM00028...
Page 256 Displays the measured value of the selected magnitude of the selected slot. -10 000 000.000…10 000 Magnitude X 0.001 - 000.000 The unit depends on the selected magnitude (either amperes, volts, or per-unit values). © Arcteq Relays Ltd IM00028...
Page 257: Connections Of Aq-T256
A A Q Q -T256 -T256 Instruction manual Version: 2.06 7 Connections and application examples 7.1 Connections of AQ-T256 Figure. 7.1 - 112. AQ-T256 variant without add-on modules. © Arcteq Relays Ltd IM00028...
Page 258 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 7.1 - 113. AQ-T256 variant with digital input and output modules. © Arcteq Relays Ltd IM00028...
Page 259: Application Example And Its Connections
A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 7.1 - 114. AQ-T256 application example with function block diagram. AQ-T256 Device I/O Add-on 6 (IL) 1...3 10 slots 4 (I0) Protection functions I> I0> I2> Ih> 50H/51H 46/46R...
Page 260: Trip Circuit Supervision (95)
(52b) even after the circuit breaker is opened. This requires a resistor which reduces the current: this way the coil is not energized and the relay output does not need to cut off the coil's inductive current. © Arcteq Relays Ltd IM00028...
Page 261 Non-latched outputs are seen as hollow circles in the output matrix, whereas latched contacts are painted. See the image below of an output matrix where a non-latched trip contact is used to open the circuit breaker. © Arcteq Relays Ltd IM00028...
Page 262 There is one main difference between non-latched and latched control in trip circuit supervision: when using the latched control, the trip circuit (in an open state) cannot be monitored as the digital input is shorted by the IED's trip output. © Arcteq Relays Ltd IM00028...
Page 263 Logical output can be used in the output matrix or in SCADA as the user wants. The image below presents a block scheme when a non-latched trip output is not used. © Arcteq Relays Ltd IM00028...
Page 264 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 7.3 - 120. Example block scheme. © Arcteq Relays Ltd IM00028...
Page 265: Construction And Installation Tion
The images below present the modules of both the non-optioned model (AQ- X256-XXXXXXX-AAAAAAAAAA AAAAAAAAAA) and the fully optioned model (AQ-X256-XXXXXXX-BBBBCCCCC BBBBCCCCCJ J ). Figure. 8.1 - 121. Modular construction of AQ-X256-XXXXXXX-AAAAAAAAAA © Arcteq Relays Ltd IM00028...
Page 266 In field upgrades, therefore, the add-on module must be ordered from Arcteq Relays Ltd. or its representative who can then provide the module with its corresponding unlocking code to allow the device to operate correctly once the hardware configuration has been upgraded.
Page 267 P215-PH0AAAA-BBC) matches with the existing modules in the device. If the code and the modules do not match, the device issues and alarm. An alarm is also issued if the device expects to find a module here but does not find one. © Arcteq Relays Ltd IM00028...
Page 268: Cpu Module
(DO1…DO5) in the CPU module, and the rest in Slots I…M in groups of five. Additionally, there is a double (LC) fiber Ethernet communication option card installed in Slot N. These same principles apply to all non-standard configurations in the AQ-X256 IED family. 8.2 CPU module Figure. 8.2 - 124. CPU module. © Arcteq Relays Ltd IM00028...
Page 269 Selects whether the status of the digital input is 1 or 0 when the input DIx Polarity 0: NO 1: NC (Normally is energized. closed) DIx Activation 0.000…1800.000 0.001 0.000 s Defines the delay for the status change from 0 to 1. delay © Arcteq Relays Ltd IM00028...
Page 270: Current Measurement Module
Fine residual current measurement I02. A basic current measurement module with five channels includes three-phase current measurement inputs as well as coarse and fine residual current inputs. The CT module is available with either standard or ring lug connectors. © Arcteq Relays Ltd IM00028...
Page 271: Digital Input Module (Optional)
Description (x = the number of digital inputs in other modules that preceed this one in the Connector configuration) DIx + 1 DIx + 2 DIx + 3 DIx + 4 Common earthing for the first four digital inputs. DIx + 5 © Arcteq Relays Ltd IM00028...
Page 272 Displays the number of times the digital input has changed its status from 0…2 –1 Counter 0 to 1. DIx Clear 0: - 0: - Resets the DIx counter value to zero. counter 1: Clear © Arcteq Relays Ltd IM00028...
Page 273 Control → Device IO → Digital inputs → Digital input voltages . Table. 8.4 - 180. Digital input channel voltage measurement. Name Range Step Description DIx Voltage now 0.000...275.000 V 0.001 V Voltage measurement of a digital input channel. © Arcteq Relays Ltd IM00028...
Page 274: Digital Output Module (Optional)
Table. 8.5 - 181. Digital output user description. Name Range Default Description User editable 1...31 Description of the digital output. This description is used in several menu OUTx description OUTx characters types for easier identification. © Arcteq Relays Ltd IM00028...
Page 275: Point Sensor Arc Protection Module (Optional)
The rated voltage of the binary input is 24 VDC. The threshold picks up at ≥16 VDC. The binary input can be used for external light information or for similar applications. It can also be used as a part of various ARC schemes. Please note that the binary input's delay is 5…10ms. © Arcteq Relays Ltd IM00028...
Page 276: Rtd Input Module (Optional)
The RTD input module is an add-on module with eight (8) RTD input channels. Each input supports 2-wire, 3-wire and 4-wire RTD sensors. The sensor type can be selected with software for two groups, four channels each. The card supports Pt100 and Pt1000 sensors © Arcteq Relays Ltd IM00028...
Page 277: Serial Rs-232 Communication Module (Optional)
Description • Serial-based communications • Wavelength 660 nm Serial fiber (GG/ • Compatible with 50/125 μm, 62.5/125 μm, 100/140 μm, and COM E PP/GP/PG) 200 μm Plastic-Clad Silica (PCS) fiber • Compatible with ST connectors © Arcteq Relays Ltd IM00028...
Page 278: Lc Or Rj45 100 Mbps Ethernet Communication Module (Optional)
The option card includes two serial communication interfaces: COM E is a serial fiber interface with glass/plastic option, COM F is an RS-232 interface. 8.9 LC or RJ45 100 Mbps Ethernet communication module (optional) Figure. 8.9 - 133. LC and RJ45 100 Mbps Ethernet module connectors. © Arcteq Relays Ltd IM00028...
Page 279: Double St 100 Mbps Ethernet Communication Module (Optional)
Two-pin connector • Duplex ST connectors • 62.5/125 μm or 50/125 μm multimode fiber • Transmitter wavelength: 1260…1360 nm (nominal: 1310 nm) ST connectors • Receiver wavelength: 1100…1600 nm • 100BASE-FX • Up to 2 km © Arcteq Relays Ltd IM00028...
Page 280 The images below present two example configurations: the first displays a ring configuration (note how the third party devices are connected in a separate ring), while the second displays a multidrop configuration. Figure. 8.10 - 135. Example of a ring configuration. © Arcteq Relays Ltd IM00028...
Page 281: Double Rj45 10/100 Mbps Ethernet Communication Module (Optional)
Figure. 8.10 - 136. Example of a multidrop configuration. 8.11 Double RJ45 10/100 Mbps Ethernet communication module (optional) Figure. 8.11 - 137. Double RJ-45 10/100 Mbps Ethernet communication module. Connector Description • IRIG-B input Two-pin connector © Arcteq Relays Ltd IM00028...
Page 282: Milliampere (Ma) I/O Module (Optional)
For other redundancy options, please refer to the option card "LC 100 Mbps Ethernet communication module". Figure. 8.11 - 138. Example of a multidrop configuration. 8.12 Milliampere (mA) I/O module (optional) Figure. 8.12 - 139. Milliampere (mA) I/O module connections. © Arcteq Relays Ltd IM00028...
Page 283: Dimensions And Installation
(½) of the rack's width, meaning that a total of two devices can be installed to the same rack next to one another. The figures below describe the device dimensions (first figure), the device installation (second), and the panel cutout dimensions and device spacing (third). Figure. 8.13 - 140. Device dimensions. © Arcteq Relays Ltd IM00028...
Page 284 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 8.13 - 141. Device installation. © Arcteq Relays Ltd IM00028...
Page 285 A A Q Q -T256 -T256 Instruction manual Version: 2.06 Figure. 8.13 - 142. Panel cut-out and spacing of the IED. © Arcteq Relays Ltd IM00028...
Page 286: Technic Echnical Da Al Data Ta
From 6…75 Hz fundamental, up to the 31 harmonic current Current measurement range 5 mA…150 A (RMS) 0.002…10.000 × I < ±0.5 % or < ±3 mA Current measurement inaccuracy 10…150 × I < ±0.5 % © Arcteq Relays Ltd IM00028...
Page 287: Frequency Measurement
Frequency measuring range 6…75 Hz fundamental, up to the 31 harmonic current or voltage Inaccuracy 10 mHz 9.1.2 CPU & Power supply 9.1.2.1 Auxiliary voltage Table. 9.1.2.1 - 185. Power supply model A Rated values © Arcteq Relays Ltd IM00028...
Page 288: Cpu Communication Ports
Number of ports PC-protocols Port protocols Telnet Features Data transfer rate 100 MB System integration Cannot be used for system protocols, only for local programming Table. 9.1.2.2 - 188. Rear panel system communication port A. Port © Arcteq Relays Ltd IM00028...
Page 289: Cpu Digital Inputs
Order code defined: 14, 65, 132 V Scanning rate 5 ms Settings Pick-up delay Software settable: 0…1800 s Polarity Software settable: Normally On/Normally Off Current drain 2 mA Terminal block connection Terminal block Phoenix Contact MSTB 2,5/5-ST-5,08 © Arcteq Relays Ltd IM00028...
Page 290: Cpu Digital Outputs
0.4 A at 220 VDC 0.2 A Control rate 5 ms Settings Polarity Software settable: Normally On/Normally Off Terminal block connection Terminal block Phoenix Contact MSTB 2,5/5-ST-5,08 Solid or stranded wire Maximum wire diameter 2.5 mm © Arcteq Relays Ltd IM00028...
Page 291: Option Cards
Terminal block Phoenix Contact MSTB 2,5/5-ST-5,08 Solid or stranded wire 2.5 mm Maximum wire diameter 9.1.3.3 Point sensor arc protection module Table. 9.1.3.3 - 195. Technical data for the point sensor arc protection module. Connections © Arcteq Relays Ltd IM00028...
Page 292: Milliampere Module (Ma Out & Ma In)
Solid or stranded wire 2.5 mm Maximum wire diameter NOTE! TE! Polarity has to be correct. 9.1.3.4 Milliampere module (mA out & mA in) Table. 9.1.3.4 - 198. Technical data for the milliampere module. Signals © Arcteq Relays Ltd IM00028...
Page 293: Rtd Input Module
1 mm plastic fiber 9.1.3.7 Double LC 100 Mbps Ethernet communication module Table. 9.1.3.7 - 201. Technical data for the double LC 100 Mbps Ethernet communication module. Protocols Protocols HSR and PRP Ports Quantity of fiber ports © Arcteq Relays Ltd IM00028...
Page 294: Display
0…5.0000, step 0.0001 - C IDMT constant 0…250.0000, step 0.0001 Inaccuracy: - IDMT operating time ±1.5 % or ±20 ms - IDMT minimum operating time ±20 ms Retardation time (overshoot) <30 ms Instant operation time © Arcteq Relays Ltd IM00028...
Page 295: Non-Directional Earth Fault Protection (I0>; 50N/51N)
- IDMT minimum operating time ±20 ms Retardation time (overshoot) <30 ms Instant operation time Start time and instant operation time (trip): ratio > 3.5 <50 ms (typically 35 ms) ratio = 1.05…3.5 <55 ms Reset © Arcteq Relays Ltd IM00028...
Page 296: Negative Sequence Overcurrent/ Phase Current Reversal/ Current Unbalance Protection (I2>; 46/46R/46L)
<70 ms Reset Reset ratio 97 % of the pick-up setting Reset time setting 0.010…10.000 s, step 0.005 s Inaccuracy: Reset time ±1.5 % or ±60 ms Instant reset time and start-up reset <55 ms © Arcteq Relays Ltd IM00028...
Page 297: Harmonic Overcurrent Protection (Ih>; 50H/51H/68H)
• Tripping: When using the harmonic overcurrent stage for tripping, please ensure that the operation time is set to 20 ms (DT) or longer to avoid nuisance tripping caused by the above- mentioned reasons. © Arcteq Relays Ltd IM00028...
Page 298: Circuit Breaker Failure Protection (Cbfp; 50Bf/52Bf)
Bias (Turnpoint 1 & 2) 0.01…50.00 × I , setting step 0.01 × I ±3% of the set pick-up value > 0.5 × I setting. Inaccuracy - Starting ±5 mA < 0.5 × I setting Operation time © Arcteq Relays Ltd IM00028...
Page 299: Transformer Thermal Overload Protection (Tt>; 49T)
Alarm setting range 101.00…2000.00 deg, setting step 0.1 deg (either < or > setting) Inaccuracy ±3 % of the set pick-up value Reset ratio 97 % of the pick-up setting Operation Operating time Typically <500 ms © Arcteq Relays Ltd IM00028...
Page 300: Transformer Status Monitoring
Slope 2 0.01…250.00 % by step 0.01 %, default 200.00 % Idi> pick-up 200.00...1500.00 %, step 0.01 %, default 600.00 % Internal harmonic blocking selection None, 2 harmonic, 5 harmonic, both 2 and 5 harmonic. © Arcteq Relays Ltd IM00028...
Page 301: Arc Fault Protection (Iarc>/I0Arc>; 50Arc/50Narc) (Optional)
Typically 10 ms (6.5…14 ms) - Regular relay outputs Typically 14 ms (10…18 ms) Arc BI only: - Semiconductor outputs HSO1 and HSO2 Typically 7 ms (2…12 ms) - Regular relay outputs Typically 10 ms (6.5…15 ms) Reset © Arcteq Relays Ltd IM00028...
Page 302: Control Functions
<75 ms Object control during auto-reclosing See the technical sheet for the auto-reclosing function. 9.2.3 Monitoring functions 9.2.3.1 Current transformer supervision Table. 9.2.3.1 - 216. Technical data for the current transformer supervision function. Measurement inputs © Arcteq Relays Ltd IM00028...
Page 303: Circuit Breaker Wear Monitoring
Input signals Phase current inputs: I (A), I (B), I Current inputs Residual current channel I (Coarse) Residual current channel I (Fine) Current measurement channels (FFT result) up to the 31 harmonic Current input magnitudes component. © Arcteq Relays Ltd IM00028...
Page 304: Disturbance Recorder
The maximum number of recordings according to the chosen signals and operation time setting combined 9.2.3.5 Event logger Table. 9.2.3.5 - 220. Technical data for the event logger function. General information Event history capacity 15 000 events Event timestamp resolution 0.001 seconds 9.3 Tests and environmental © Arcteq Relays Ltd IM00028...
Page 305 Shock and bump test EN 60255-1, EN 60255-27, IEC 60255-21-2 20 g, 1 000 bumps/dir. Table. 9.3 - 224. Environmental tests. Damp heat (cyclic) EN 60255-1, IEC 60068-2-30 Operational: +25…+55 °C, 93…97 % (RH), 12+12h Dry heat © Arcteq Relays Ltd IM00028...
Page 306 Height: 208 mm Dimensions Width: 257 mm (½ rack) Depth: 165 mm (no cards or connectors) Weight 1.5 kg With packaging (gross) Height: 250 mm Dimensions Width: 343 mm Depth: 256 mm Weight 2.0 kg © Arcteq Relays Ltd IM00028...
Page 307: Ordering Inf Dering Informa Ormation Tion
Advanced Co. ADAM-4015-CE configured module Ltd. ADAM-4018+- External 8-ch Thermocouple mA Input module, pre- Requires an external power Advanced Co. configured module Ltd. AQX121 Raising frame 120mm Arcteq Ltd. AQX122 Raising frame 40mm Arcteq Ltd. © Arcteq Relays Ltd IM00028...
Page 308 Pressure and light point sensor unit (25,000 lux AQ-02B Max. cable length 200 m Arcteq Ltd. threshold) Pressure and light point sensor unit (50,000 lux AQ-02C Max. cable length 200 m Arcteq Ltd. threshold) © Arcteq Relays Ltd IM00028...
Page 309: Contact And R Ence Informa Ormation Tion
Arcteq Relays Ltd. Visiting and postal address Kvartsikatu 2 A 1 65300 Vaasa, Finland Contacts Phone: +358 10 3221 370 Website: arcteq.fi Technical support: support.arcteq.fi +358 10 3221 388 (EET 9:00 – 17.00) E-mail (sales): sales@arcteq.fi © Arcteq Relays Ltd IM00028...

Arcteq AQ-T256 Instruction Manual

Quick Links

Need help?

Questions and answers

Related Manuals for Arcteq AQ-T256

Summary of Contents for Arcteq AQ-T256

Table of Contents