Page 1 AQ-T256 Transformer protection device Instruction manual...
Page 2: Table Of Contents
3.2 Configuring user levels and their passwords................. 14 4 Functions unctions ...................................................... 16 4.1 Functions included in AQ-T256.................... 16 4.2 Measurements........................17 4.2.1 Current measurement and scaling in differential applications ........17 4.2.2 Frequency tracking and scaling ................. 30 4.3 General menu........................
Page 3 6 Connections and applic 6 Connections and applica a tion examples tion examples..................................265 6.1 Connections of AQ-T256 ....................265 6.2 Application example and its connections................267 6.3 Trip circuit supervision (95) ....................268 7 Construction and installa 7 Construction and installation tion ....................
Page 4 8.3 Tests and environmental ....................324 9 Or 9 Ordering inf dering informa ormation tion ..............................................327 10 Contact and r 10 Contact and re e f f er erence inf ence informa ormation tion....................................329 © Arcteq Relays Ltd IM00028...
Page 5 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 6: 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 7 "Pretrigger" is -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 8 - Added logical device and logical node mode descriptions. Revision 2.09 Date 14.3.2023 - Updated the Arcteq logo on the cover page and refined the manual's visual look. - Added the "Safety information" chapter and changed the notes throughout the document accordingly.
Page 9: Version 1 Revision Notes
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 and T257. Revision 1.01 Date 10.2.2017 • Added the programmable stage description. Changes • Order code updated.
Page 10: Safety Information
ASDU – Application service data unit AVR – Automatic voltage regulator BCD – Binary-coded decimal CB – Circuit breaker CBFP – Circuit breaker failure protection CLPU – Cold load pick-up CPU – Central processing unit © Arcteq Relays Ltd IM00028...
Page 11 LED – Light emitting diode LV – Low voltage NC – Normally closed NO – Normally open NTP – Network Time Protocol RMS – Root mean square RSTP – Rapid Spanning Tree Protocol RTD – Resistance temperature detector © 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: 2.11 2 General The AQ-T256 transformer protection device is a member of the AQ 250 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 device.
Page 14: Device User Int Vice User Interface Erface
Home Home and the password activation buttons). 6. Twelve (12) freely configurable function buttons (F1…F12). Each button has a freely configurable LED (red, orange, green). 7. One (1) RJ-45 Ethernet port for device configuration. © 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 Unlocking and locking a user level generates a time-stamped event to the event log in all AQ 250 series devices. NOTICE! TICE! 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: 2.11 4 Functions 4.1 Functions included in AQ-T256 The AQ-T256 transformer protection device includes the following functions as well as the number of stages in those functions. Table. 4.1 - 3. Protection functions of AQ-T256. Name (number of...
Page 18: Measurements
Description Indicator object monitoring (10 objects available) CLPU CLPU Cold load pick-up SOTF SOTF Switch-on-to-fault Table. 4.1 - 5. Monitoring functions of AQ-T256. Name ANSI Description CTS (2) Current transformer supervision Disturbance recorder Circuit breaker wear monitor Total harmonic distortion...
Page 19 For the measurements to be correct the user needs to ensure that the measurement signals are connected to the correct inputs, that the current direction is connected correctly, and that the scaling is set correctly. © Arcteq Relays Ltd IM00028...
Page 20 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 21 TrafoModule → Idx> [87T,87N] → Settings ). This way the direction of the measured currents are checked correctly from the device's perspective. The following table presents the initial data of the connection as well as the ratings. © Arcteq Relays Ltd IM00028...
Page 22 As seen in the image above, device 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 23 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 24 [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 25 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 26 CT scaling factor P/S between the primary current and the secondary current. A feedback value; the calculated CT scaling factor scaling factor that is the ratio between the set primary current and the set nominal current. © Arcteq Relays Ltd IM00028...
Page 27 The following measurements are available in the measured current channels. Table. 4.2.1 - 11. Per-unit phase current measurements. Name Unit Range Step Description Phase current 0.000…1 The RMS current measurement (in p.u.) from each of the × In 0.001 250.000 phase current channels. ("Pha.curr.ILx") © Arcteq Relays Ltd IM00028...
Page 28 The RMS current measurement (in p.u.) from the residual current I0x × In 0.001 250.000 current channel I01 or I02. ("Res.curr.I0x") 0.000…1 The RMS current measurement (in p.u.) from the calculated Calculated I0 × In 0.001 250.000 I0 current channel. © Arcteq Relays Ltd IM00028...
Page 29 Unit Range Step Description Residual current angle I0x The residual current angle measurement from the I01 or 0.000…360.000 0.001 ("Res.curr.angle I02 current input. I0x") Calculated I0 angle 0.000…360.000 0.001 The calculated residual current angle measurement. © Arcteq Relays Ltd IM00028...
Page 30 Secondary negative sequence current The secondary measurement from the calculated 0.000…300.000 0.001 ("Sec.Negative negative sequence current. sequence curr.") Secondary zero sequence current The secondary measurement from the calculated 0.000…300.000 0.001 ("Sec.Zero sequence zero sequence current. curr.") © Arcteq Relays Ltd IM00028...
Page 31: Frequency Tracking And Scaling
The benefit of frequency tracking is that the measurements are within a pre-defined accuracy range even when the fundamental frequency of the power system changes. Frequency independent current and voltage measurement accuracy is achieved with algorithms specified in patent US 10,809,287. © Arcteq Relays Ltd IM00028...
Page 32 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 33 • References 2 & 3 trackable • All references trackable • No track ch Frequency • Ref1 Indicates which reference is used at the moment measurement • Ref2 for frequency tracking. in use • Ref3 © Arcteq Relays Ltd IM00028...
Page 34 • Track Ref 2 • Track Ref 3 • Fast Ref 1 • Fast Ref 2 • Fast Ref 3 SS1.meas.frqs Displays frequency used by "system set" channel 0.000…75.000Hz 0.001Hz - 1 and 2. SS2.meas.frqs © Arcteq Relays Ltd IM00028...
Page 35: General Menu
Prohibited From HMI/setting tool only: Can only be changed from the mode only setting tool or HMI • Allowed Allowed: Can be changed from the setting tool, HMI, and IEC 61850 client. © Arcteq Relays Ltd IM00028...
Page 36 • Activated colors blink each color. • - HMI restart When activated, display restarts. • Restart Display color • Light theme Light theme Defines the color theme used in the HMI. theme • Dark theme © Arcteq Relays Ltd IM00028...
Page 37: Protection Functions
The function is used for one-phase, two-phase or three-phase overcurrent and short circuit protection. The function offers four (4) independent stages. The operating decisions are based on phase current magnitude, constantly measured by the function. © Arcteq Relays Ltd IM00028...
Page 38 Table. 4.4.1 - 30. General settings of the function. Name Range Default Description Setting control • Disabled Activating this parameter allows changing the pick-up level of • Disabled from comm bus • Allowed the protection stage via SCADA. © Arcteq Relays Ltd IM00028...
Page 39 Setting group selection controls the operating characteristics of the function, i.e. the user or user- defined logic can change function parameters while the function is running. Table. 4.4.1 - 31. Pick-up settings. Name Description Range Step Default 0.10…50.00×I 0.01×I 1.20×I Pick-up setting © Arcteq Relays Ltd IM00028...
Page 40 If the blocking signal is not activated when the pick-up element activates, a START signal is generated and the function proceeds to the time characteristics calculation. © Arcteq Relays Ltd IM00028...
Page 41 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. © Arcteq Relays Ltd IM00028...
Page 42 START, TRIP or BLOCKED. The table below presents the structure of the function's register content. Table. 4.4.1 - 35. Register content. Name Description Date and time dd.mm.yyyy hh:mm:ss.mss Event Event name Fault type L1-E…L1-L2-L3 Pre-trigger current Start/Trip -20ms current © Arcteq Relays Ltd IM00028...
Page 43: Non-Directional Earth Fault Protection (I0>; 50N/51N)
Peak-to-peak measurement of coarse residual current measurement input I01 5 ms Fundamental frequency component of sensitive residual current measurement input I02 5 ms TRMS TRMS measurement of coarse sensitive current measurement input I02 5 ms © Arcteq Relays Ltd IM00028...
Page 44 (in single, dual or all phases) it triggers the pick-up operation of the function. Setting group selection controls the operating characteristics of the function, i.e. the user or user- defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 45 0.005 remaining 0.000...1800.000 s towards a trip, this displays how much time is left before tripping to trip occurs. 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 46 The function offers four (4) independent stages; the events are segregated for each stage operation. Table. 4.4.2 - 41. Event messages. Event block name Event names NEF1...NEF4 Start ON NEF1...NEF4 Start OFF NEF1...NEF4 Trip ON NEF1...NEF4 Trip OFF © Arcteq Relays Ltd IM00028...
Page 47: Negative Sequence Overcurrent/ Phase Current Reversal/ Current Unbalance Protection (I2>; 46/46R/46L)
I and I . The zero sequence current is also recorded into the registers as well as the angles of the positive, negative and zero sequence currents in order to better verify any fault cases. © Arcteq Relays Ltd IM00028...
Page 48 Fundamental frequency component of phase L3 (C) current measurement 5 ms 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 49 The function's Info page displays useful, real-time information on the state of the protection function. It is accessed either through the device's HMI display, or through the setting tool software when it is connected to the device and its Live Edit mode is active. © Arcteq Relays Ltd IM00028...
Page 50 Unique to the current unbalance protection is the availability of the “Curve2” delay which follows the formula below: • t = Operating time • I = Calculated negative sequence 2meas • k = Constant k value (user settable delay multiplier) © Arcteq Relays Ltd IM00028...
Page 51 The function offers four (4) independent stages; the events are segregated for each stage operation. Table. 4.4.3 - 47. Event messages. Event block name Event names CUB1...CUB4 Start ON CUB1...CUB4 Start OFF CUB1...CUB4 Trip ON © Arcteq Relays Ltd IM00028...
Page 52: Harmonic Overcurrent Protection (Ih>; 50H/51H/68H)
The number of stages in the function depends on the device model. The function constantly measures the selected harmonic component of the selected measurement channels, the value being either absolute value or relative to the RMS value. © Arcteq Relays Ltd IM00028...
Page 53 The magnitudes (RMS) of phase L1 (A) current components: - Fundamental harmonic harmonic harmonic harmonic harmonic 5 ms harmonic harmonic - 11 harmonic - 13 harmonic - 15 harmonic - 17 harmonic - 19 harmonic. © Arcteq Relays Ltd IM00028...
Page 54 The magnitudes (RMS) of residual I0 current components: - Fundamental harmonic harmonic harmonic harmonic harmonic 5 ms harmonic harmonic - 11 harmonic - 13 harmonic - 15 harmonic - 17 harmonic - 19 harmonic. © Arcteq Relays Ltd IM00028...
Page 55 General menu. • Blocked Ih> • Side 1 Defines which current measurement module is used by the function. measurement Side 1 • Side 2 Visible if the unit has more than one current measurement module. side © Arcteq Relays Ltd IM00028...
Page 56 Setting group selection controls the operating characteristics of the function, i.e. the user or user- defined logic can change function parameters while the function is running. Table. 4.4.4 - 51. Pick-up settings. Name Range Step Default Description Pick-up setting 0.05…2.00×I 0.01×I 0.20×I (per unit monitoring) © Arcteq Relays Ltd IM00028...
Page 57 The variables the user can set are binary signals from the system. The blocking signal needs to reach the device minimum of 5 ms before the set operating delay has passed in order for the blocking to activate in time. © Arcteq Relays Ltd IM00028...
Page 58 Event Event name Fault type L1-G…L1-L2-L3 Pre-trigger current Start/Trip -20ms current Fault current Start/Trip current Pre-fault current Start -200ms current Trip time remaining 0 ms...1800s Setting group in use Setting group 1...8 active © Arcteq Relays Ltd IM00028...
Page 59: Circuit Breaker Failure Protection (Cbfp; 50Bf/52Bf)
Fundamental frequency component of phase L1 (A) current measurement Fundamental frequency component of phase L2 (B) current measurement Fundamental frequency component of phase L3 (C) current measurement Fundamental frequency component of residual input I measurement © Arcteq Relays Ltd IM00028...
Page 60 (in single, dual or all phases) it triggers the pick-up operation of the function. Setting group selection controls the operating characteristics of the function, i.e. the user or user- defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 61 The function's Info page displays useful, real-time information on the state of the protection function. It is accessed either through the device's HMI display, or through the setting tool software when it is connected to the device and its Live Edit mode is active. © Arcteq Relays Ltd IM00028...
Page 62 RETRIP signal is activated. delay CBFP starts the timer. This setting defines how long the CBFP 0.000…1800.000s 0.005s 0.200s starting condition has to last before the CBFP signal is activated. © Arcteq Relays Ltd IM00028...
Page 63 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 incoming feeder circuit breaker. Below are a few operational cases regarding the various applications. © Arcteq Relays Ltd IM00028...
Page 64 CBFP signal to the incoming feeder 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 65 (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 66 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 67 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 68 CBFP signal is sent to the incoming feeder circuit 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 69 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 70 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 71 A A Q Q -T256 -T256 4 Functions Instruction manual Version: 2.11 Device configuration as a dedicated CBFP unit Figure. 4.4.5 - 24. Wiring diagram when the device is configured as a dedicated CBFP unit. © Arcteq Relays Ltd IM00028...
Page 72 The function's outputs can be used for direct I/O controlling and user logic programming. The function also provides a resettable cumulative counters for RETRIP, CBFP, CBFP START and BLOCKED events. Table. 4.4.5 - 62. Event messages. Event block name Event names CBF1 Start ON CBF1 Start OFF © Arcteq Relays Ltd IM00028...
Page 73 Highest phase current Residual current I01, I02 channel or calculated residual current Time to RETR Time remaining to retrip activation Time to CBFP Time remaining to CBFP activation Setting group in use Setting group 1...8 active © Arcteq Relays Ltd IM00028...
Page 74: Transformer Status Monitoring
Figure. 4.4.6 - 26. Simplified function block diagram of the transformer status monitoring function. 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. © Arcteq Relays Ltd IM00028...
Page 75 • On • Blocked Set mode of MST block. TRF LN • Test This parameter is visible only when Allow setting of mode • Test/ individual LN mode is enabled in General menu. Blocked • Off © Arcteq Relays Ltd IM00028...
Page 76 LV side. voltage Transformer The transformer's short-circuit impedance in 0.01…25.00% 0.01% 3.00% percentages. Used for calculating short-circuit current. Transformer The transformer's nominal frequency. Used for calculating 10…75Hz 50Hz nom. freq. the transformer's nominal short-circuit inductance. © Arcteq Relays Ltd IM00028...
Page 77 HV side. E.g. if the transformer is Dy1, this is set to 30 0.0...360.00deg 0.1deg 0.0deg phase angle degrees. The selection is visible only if the option "Manual set" is selected for the vector group setting. © Arcteq Relays Ltd IM00028...
Page 78 LV poles of the transformer. Shows how the calculated maximum three-phase LV side 3ph 0.001…500.000kA 0.001kA 0.000kA short-circuit current in the LV side is seen in the HV SC to HV side side. © Arcteq Relays Ltd IM00028...
Page 79 TRF1 Light/No load OFF TRF1 HV side inrush ON TRF1 HV side inrush OFF TRF1 LV side inrush ON TRF1 LV side inrush OFF TRF1 Load normal ON TRF1 Load normal OFF TRF1 Overloading ON © Arcteq Relays Ltd IM00028...
Page 80 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 81 Force setting • Disabled Disabled changed remotely or from a local HMI. This parameter overrides the group change • Enabled local control of the setting groups and it remains on until the user disables it. © Arcteq Relays Ltd IM00028...
Page 82 The setting group selection function block (abbreviated "SGS2" in event block names) generates events from its controlling status, its applied input signals, enabling and disabling of setting groups, as well as unsuccessful control changes. The events triggered by the function are recorded with a time stamp. © Arcteq Relays Ltd IM00028...
Page 83: Transformer Thermal Overload Protection (Tt>; 49T)
"memory" uses; it is an integral function which tells this function apart from a normal overcurrent function and its operating principle for overload protection applications. The thermal image for the function is calculated according to the equation described below: © Arcteq Relays Ltd IM00028...
Page 84 100 % 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 85 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 86 Figure. 4.4.7 - 30. Ambient temperature coefficient calculation (a three-point linear approximation and a settable correction curve). Function inputs and outputs The following figure presents a simplified function block diagram of the transformer thermal overload protection function. © Arcteq Relays Ltd IM00028...
Page 87 • Test/ enabled in General menu. Blocked • Off TT> • Disabled The selection of the function is activated or disabled in the configuration. Disabled mode • Activated By default it is not in use. © Arcteq Relays Ltd IM00028...
Page 88 The manual fixed ambient temperature setting for the Man. thermal image biasing. Underground cables usually use 15 amb. 0…500deg 1deg 15deg °C. This setting is visible if "Manual set" is selected for the temp. set "Ambient temp. sel." setting. © Arcteq Relays Ltd IM00028...
Page 89 3…10 the maximum set temperature reference, the used temperature coefficient is the first or last value in the set curve. This setting is visible if "Ambient lin. or curve" is set to "Set curve". © Arcteq Relays Ltd IM00028...
Page 90 The blocking signal is received from the blocking matrix in the function's dedicated input. If the blocking signal is not activated when the pick-up element activates, a START signal is generated and the function proceeds to the time characteristics calculation. © Arcteq Relays Ltd IM00028...
Page 91 TT> • Ambient t Indicates if ambient temperature settings have been set wrong and actually used Setting set fault. setting is 1.0. Visible only when there is a setting fault. alarm Override to © Arcteq Relays Ltd IM00028...
Page 92 Table. 4.4.7 - 79. Counters. Name Description / values Alarm1 inits The number of times the function has activated the Alarm 1 output Alarm2 inits The number of times the function has activated the Alarm 2 output © Arcteq Relays Ltd IM00028...
Page 93 ON event process data for TRIP, BLOCKED, etc. signals. The table below presents the structure of the function's register content. Table. 4.4.7 - 81. Register content. Name Description Date and time dd.mm.yyyy hh:mm:ss.mss Event Event name Time to reach 100 % theta seconds Ref. T current © Arcteq Relays Ltd IM00028...
Page 94: Generator/Transformer Differential Protection (Idb>/Idi>/I0Dhv>/I0Dlv>; 87T/87N/87G)
This function can also be used for protecting generators. Figure. 4.4.8 - 32. Differential protection function can be used for protecting transformers, generators and both at the same time. © Arcteq Relays Ltd IM00028...
Page 96 (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 97 • 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. 4.4.8 - 33. Transformer and its components forming the differential zone. © Arcteq Relays Ltd IM00028...
Page 98 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 99 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 100 A A Q Q -T256 -T256 4 Functions Instruction manual Version: 2.11 Figure. 4.4.8 - 36. Yd1 transformer's internal connection (in theory). © Arcteq Relays Ltd IM00028...
Page 101 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 102 A A Q Q -T256 -T256 4 Functions Instruction manual Version: 2.11 Figure. 4.4.8 - 38. "Subtract" formula. Figure. 4.4.8 - 39. "Add" formula. Figure. 4.4.8 - 40. CTs' starpoints requiring the "Add" mode. © Arcteq Relays Ltd IM00028...
Page 103 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 104 ). 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 105 3) Protection relay measurement accuracy (primary and secondary) (RE The protection 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 106 This causes a difference in the nominal current condition, which can be noticed as a differential current in the protection 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 107 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 108 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 109 CTs differently (starpoint towards or away from the transformer). Thus, the differential current is always calculated as follows: © Arcteq Relays Ltd IM00028...
Page 110 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 111 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 112 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 113 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 114 (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 115 A A Q Q -T256 -T256 4 Functions Instruction manual Version: 2.11 Figure. 4.4.8 - 47. Example configuration for the transformer differential function. © Arcteq Relays Ltd IM00028...
Page 116 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 117 (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 118 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 119 (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 120 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 121 (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 122 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 123 Figure. 4.4.8 - 53. Inrush blocking by using the 2 harmonic (relative to fundamental frequency). Figure. 4.4.8 - 54. Example of transformer magnetizing inrush currents. A conservative setting recommendation for standard type transformers: © Arcteq Relays Ltd IM00028...
Page 124 Figure. 4.4.8 - 55. Transformer behavior in case of overvoltage caused by overexcitation. © Arcteq Relays Ltd IM00028...
Page 125 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 126 (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 127 • On Set mode of DIF block. • Blocked Idx> LN • Test This parameter is visible only when Allow mode • Test/ setting of individual LN mode is enabled Blocked in General menu. • Off © Arcteq Relays Ltd IM00028...
Page 128 The transformer's short-circuit Transformer 0.01…25.00% 0.01% 3.00% Info impedance in percentages. Used for calculating short-circuit current. The transformer's nominal frequency. Transformer 10…75Hz 50Hz Info Used for calculating the transformer's nom. freq. nominal short-circuit inductance. © Arcteq Relays Ltd IM00028...
Page 129 LV side grounded monitoring LV side current calculation. The selection grounded grounded • Grounded - transformer is visible only if the option "Manual set" is differential selected for the vector group setting. © Arcteq Relays Ltd IM00028...
Page 130 "Enabled" is selected for the "Enable I0d> differential (REF) LV side" setting. Setting group selection controls the operating characteristics of the function, i.e. the user or user- defined logic can change function parameters while the function is running. © Arcteq Relays Ltd IM00028...
Page 131 "Enable Idi> stage" is disabled. The base sensitivity for the HV side restricted earth fault HV I0d> 0.01…100.00% 0.01% 10.00% differential characteristics. This setting is only visible if Pick-up the "Enable I0d> (REF) HV side" setting is enabled. © Arcteq Relays Ltd IM00028...
Page 132 The calculated phase L1 maximum differential current allowed with current bias level L3Char The calculated phase L1 maximum differential current allowed with current bias level HV I0d> Bias The calculated HV side restricted earth fault bias current current © Arcteq Relays Ltd IM00028...
Page 133 The function's outputs can be used for direct I/O controlling and user logic programming. The function also provides a resettable cumulative counter for the TRIP, 2 Harmonic Block, 5 Harmonic Block, External Block events. © Arcteq Relays Ltd IM00028...
Page 134 DIF1 L2 5 harmonic OFF DIF1 L3 5 harmonic ON DIF1 L3 5 harmonic OFF DIF1 HV I0d> Block ON DIF1 HV I0d> Block OFF DIF1 HV I0d> Trip ON DIF1 HV I0d> Trip OFF © Arcteq Relays Ltd IM00028...
Page 135 LV I0d> differential current LV side REF differential current LV I0d> characteristics current LV side REF maximum differential current with bias Setting group in use Setting group in use Ftype Detected fault type (faulty phases) © Arcteq Relays Ltd IM00028...
Page 136: Resistance Temperature Detectors (Rtd)
• Blocked Displays the mode of RTD block. RTD LN • Test This parameter is visible only when Allow setting of individual LN mode is behaviour • Test/ enabled in General menu. Blocked • Off © Arcteq Relays Ltd IM00028...
Page 137 Sets the pick-up value for Alarm 1. The alarm is activated if the measurement S1...S16 Alarm1 -101.0…2000.0deg 0.1deg 0.0deg goes above or below this setting mode (depends on the selected mode in "Sx Alarm1 >/<"). © Arcteq Relays Ltd IM00028...
Page 138 Table. 4.4.9 - 90. Event messages. Event block name Event names RTD1 S1...S16 Alarm1 ON RTD1 S1...S16 Alarm1 OFF RTD1 S1...S16 Alarm2 ON RTD1 S1...S16 Alarm2 OFF RTD1 S1...S16 Meas Ok RTD1 S1...S16 Meas Invalid © Arcteq Relays Ltd IM00028...
Page 139: Programmable Stage (Pgx>/<; 99)
Enables the stage. • Enabled • Normal Force the status of the function. Visible only when Enable • Start PSx >/< Force status to • Trip stage forcing parameter is enabled in General menu. • Blocked © Arcteq Relays Ltd IM00028...
Page 140 PSx Magnitude selection • Impedances Defines the measurement type used by the stage admittances • Others Defines the measurement used by the stage. Available PSx MagnitudeX See table below. parameters depend on selected measurement type. © Arcteq Relays Ltd IM00028...
Page 141 Zero sequence current value (in p.u.) I0CALC Mag Calculated I0 value (in p.u.) I1 Mag Positive sequence current value (in p.u.) I2 Mag Negative sequence current value (in p.u.) I0CALC Ang Angle of calculated residual current (degrees) © Arcteq Relays Ltd IM00028...
Page 142 UL3 angle (degrees) U0Ang UL0 angle (degrees) U0CalcMag Calculated residual voltage U1 pos.seq.V Mag Positive sequence voltage U2 neg.seq.V Mag Negative sequence voltage U0CalcAng Calculated residual voltage angle (degrees) U1 pos.seq.V Ang Positive sequence voltage angle (degrees) © Arcteq Relays Ltd IM00028...
Page 143 Table. 4.4.10 - 97. Other impedances, resistances and reactances Name Description RSeqPri Positive Resistance R primary (Ω) XSeqPri Positive Reactance X primary (Ω) RSeqSec Positive Resistance R secondary (Ω) XSeqSec Positive Reactance X secondary (Ω) © Arcteq Relays Ltd IM00028...
Page 144 Admittance Y0 angle Table. 4.4.10 - 100. Other measurements Name Description System f. System frequency Ref f1 Reference frequency 1 Ref f2 Reference frequency 2 M Thermal T Motor thermal temperature F Thermal T Feeder thermal temperature © Arcteq Relays Ltd IM00028...
Page 145 -1800.000...1800.000s Displays the expected operating time when a fault occurs. time When the function has detected a fault and counts down time Time remaining to 0.000...1800.000s towards a trip, this displays how much time is left before trip tripping occurs. © Arcteq Relays Ltd IM00028...
Page 146 000.0000…5 000 0.0001 0.01 Pick-up magnitude Mag#/calc >/< 000.0000 PS# Setting 0.0000…50.0000% 0.0001% 3% Setting hysteresis hysteresis Mag# Definite operating time 0.000…1800.000s 0.005s 0.04s Delay setting delay Release time 0.000…1800.000s 0.005s 0.06s Pick-up release delay delays © Arcteq Relays Ltd IM00028...
Page 147 The variables the user can set are binary signals from the system. The blocking signal needs to reach the device minimum of 5 ms before the set operating delay has passed in order for the blocking to activate in time. © Arcteq Relays Ltd IM00028...
Page 148: Arc Fault Protection (Iarc>/I0Arc>; 50Arc/50Narc)
This delay can be avoided by using arc protection. The arc protection card has a high-speed output to trip signals faster as well as to extend the speed of arc protection. © Arcteq Relays Ltd IM00028...
Page 149 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 150 AQ-101 models are used to extend the protection of Zone 2 and to protect each outgoing feeder (Zone 3). This scheme is a single-line diagram with AQ-200 series devices and with AQ-101 arc protection relays. The settings are for an incoming feeder AQ-200 device. © Arcteq Relays Ltd IM00028...
Page 151 The next example is almost like the previous one: it is also a single-line diagram with AQ 200 series devices. However, this time each outgoing feeder has an AQ-200 protection device instead of an AQ-101 arc protection relay. © Arcteq Relays Ltd IM00028...
Page 152 Arc protection uses samples based on current measurements. If the required number of samples is found to be above the setting limit, the current condition activates. The arc protection can use either phase currents, residual currents or both. © Arcteq Relays Ltd IM00028...
Page 153 • Zone4 Trip • Zone4 Blocked Channel • No sensors sensors • 1 sensor Defines the number of sensors connected to the channel (channels 1/2/ • 2 sensors sensors 3/4). Channel • 3 sensors sensors © Arcteq Relays Ltd IM00028...
Page 154 Enables the chosen zone. Up to 4 zones can be enabled. 4 Enabled • Enabled Zone1/2/3/ • Disabled The phase overcurrent allows the zone to trip when light is 4 Ph. curr. Disabled • Enabled detected. Enabled © Arcteq Relays Ltd IM00028...
Page 155 Displays the mode of ARC block. • Blocked I/I0 Arc> LN • Test This parameter is visible only when Allow setting of individual LN behaviour • Test/Blocked mode is enabled in General menu. • Off © Arcteq Relays Ltd IM00028...
Page 156 ON, OFF, or both. The events triggered by the function are recorded with a time stamp. The function's outputs can be used for direct I/O controlling and user logic programming. The function also provides a resettable cumulative counter for the events. © Arcteq Relays Ltd IM00028...
Page 157 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. 4.4.11 - 112. Register content. Register Description Date and time dd.mm.yyyy hh:mm:ss.mss Event Event name Phase A current Trip current © Arcteq Relays Ltd IM00028...
Page 158: Control Functions
The function's Info page displays useful, real-time information on the state of the protection function. It is accessed either through the device's HMI display, or through the setting tool software when it is connected to the device and its Live Edit mode is active. © Arcteq Relays Ltd IM00028...
Page 159: Setting Group Selection
(SG1) is active and therefore the selection logic is idle. When more than one setting group is enabled, the setting group selector logic takes control of the setting group activations based on the logic and conditions the user has programmed. © Arcteq Relays Ltd IM00028...
Page 160 If setting groups are controlled by pulses, the setting group activated by pulse will stay active until another setting groups receives and activation signal. Figure. 4.5.2 - 64. Example sequences of group changing (control with pulse only, or with both pulses and static signals). © Arcteq Relays Ltd IM00028...
Page 161 Please note that if a higher priority setting setting • SG4 None group is being controlled by a signal, a lower priority setting group group change • SG5 cannot be activated with this parameter. • SG6 • SG7 • SG8 © Arcteq Relays Ltd IM00028...
Page 162 Petersen coil is connected when the network is compensated, or whether it is open when the network is unearthed. © Arcteq Relays Ltd IM00028...
Page 163 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 164 A A Q Q -T256 -T256 4 Functions Instruction manual Version: 2.11 Figure. 4.5.2 - 66. Setting group control – two-wire connection from Petersen coil status. © Arcteq Relays Ltd IM00028...
Page 165 The application-controlled setting group change can also be applied entirely from the device'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 166 ON, OFF, or both. The events triggered by the function are recorded with a time stamp. Table. 4.5.2 - 119. Event messages. Event block name Event names SG2...8 Enabled SG2...8 Disabled SG1...8 Request ON SG1...8 Request OFF Remote Change SG Request ON © Arcteq Relays Ltd IM00028...
Page 167: Object Control And Monitoring
The main outputs of the function are the OBJECT OPEN and OBJECT CLOSE control signals. Additionally, the function reports the monitored object's status and applied operations. The setting parameters are static inputs for the function, which can only be changed by the user in the function's setup phase. © Arcteq Relays Ltd IM00028...
Page 168 • On Set mode of OBJ block. • Blocked OBJ LN mode • Test This parameter is visible only when Allow setting of individual • Test/Blocked LN mode is enabled in General menu. • Off © Arcteq Relays Ltd IM00028...
Page 169 • Not in use close the breaker (depending on "Ready High or Low" selection). Open Displays the number of successful "Open" requests. 0…2 –1 requests Close Displays the number of successful "Close" requests. 0…2 –1 requests © Arcteq Relays Ltd IM00028...
Page 170 IN. "1" means that the withdrawable object In") cart is in. WD Object Out A link to a physical digital input. The monitored withdrawable ("Withdrw.CartOut.Status object's position is OUT. "1" means that the withdrawable In") object cart is pulled out. © Arcteq Relays Ltd IM00028...
Page 171 Table. 4.5.3 - 124. Control settings (DI and Application). Signal Range Description • User Access level for MIMIC • Operator Defines what level of access is required for MIMIC control • Configurator control. The default is the "Configurator" level. • Super user © Arcteq Relays Ltd IM00028...
Page 172 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 173 The function uses the circuit breaker's manufacturer-supplied data for the breaker operating cycles in relation to the interrupted current magnitudes. © Arcteq Relays Ltd IM00028...
Page 174 Table. 4.5.3 - 126. Breaker supervision settings and status indications. Name Range Default Description • Disabled Condition monitoring Disabled Enabled the breaker condition monitoring function. • Enabled • CT1 Defines which current measurement module is used Monitoring CT side • CT2 by the function. © Arcteq Relays Ltd IM00028...
Page 175 Condition Alarm 2 Enable Disabled Enables Alarm 2. • Enabled Condition Alarm 2 when When the amount of operations left is less than value 0...200 000 operations less than set here, Alarm 2 will activate. © Arcteq Relays Ltd IM00028...
Page 176 Close Command On OBJ1...OBJ10 Close Command Off OBJ1...OBJ10 Open Blocked On OBJ1...OBJ10 Open Blocked Off OBJ1...OBJ10 Close Blocked On OBJ1...OBJ10 Close Blocked Off OBJ1...OBJ10 Object Ready OBJ1...OBJ10 Object Not Ready OBJ1...OBJ10 Sync Ok OBJ1...OBJ10 Sync Not Ok © Arcteq Relays Ltd IM00028...
Page 177 The cause of an "Open" command's failure. Close fail The cause of a "Close" command's failure. Open command The source of an "Open" command. Close command The source of an "Open" command. General status The general status of the function. © Arcteq Relays Ltd IM00028...
Page 178: Indicator Object Monitoring
Close input A link to a physical digital input. The monitored indicator's signal selected by the user ("Ind.X CLOSE status. "1" refers to the active "Close" state of the monitored Close indicator. (SWx) Status In") © Arcteq Relays Ltd IM00028...
Page 179: Cold Load Pick-Up (Clpu)
Figure. 4.5.5 - 72. Simplified function block diagram of the cold load pick-up function. Measured input The function block uses fundamental frequency component of phase current measurement values. © Arcteq Relays Ltd IM00028...
Page 180 Name Range Step Default Description The pick-up setting for low current detection. All measured 0.01…40.00×In 0.01×In 0.20×In currents must be below this setting in order for the cold load pick- up signal to be activated. © Arcteq Relays Ltd IM00028...
Page 181 The behavior of the function's operating timers can be set for activation as well as for the situation monitoring and release of the cold load pick-up. The table below presents the setting parameters for the function's time characteristics. © Arcteq Relays Ltd IM00028...
Page 182 "reclaim" time for the function in case the inrush current is not immediately initiated in the start-up sequence. The six examples below showcase some typical cases with the cold load pick-up function. Figure. 4.5.5 - 73. Example of timers and pick-up parameters (normal CLPU situation). © Arcteq Relays Ltd IM00028...
Page 183 If the user wants the function to activate within a shorter period of time, the T parameter can be se to a lower value. If the user wants no delay, the T can be zero seconds and the operation will be immediate. © Arcteq Relays Ltd IM00028...
Page 184 I setting, a high counter starts counting towards the T time. The measured current exceeds the I setting during over the start-up situation and causes the cold load pick-up signal to be released immediately. © Arcteq Relays Ltd IM00028...
Page 185 When the current exceeds the I setting, a timer high starts counting towards the T time. The measured current stays above the I setting until the high is reached, which causes the release of the cold load pick-up signal. © Arcteq Relays Ltd IM00028...
Page 186 The current stays between the I setting and the I high setting, so the cold load pick-up signal is active for T time. As no inrush current is detected during that time, the signal is released. © Arcteq Relays Ltd IM00028...
Page 187 The function's outputs can be used for direct I/O controlling and user logic programming. The function also provides a resettable cumulative counter for the CLPU ACT and BLOCKED events. Table. 4.5.5 - 137. Event messages. Event block name Event names CLP1 LowStart ON CLP1 LowStart OFF CLP1 HighStart ON © Arcteq Relays Ltd IM00028...
Page 188: Switch-On-To-Fault (Sotf)
" SOTF activate input " input. The duration of the SOTF-armed condition can be set by the "Release time for SOTF" setting parameter; it can be changed if the application so requires through setting group selection. © Arcteq Relays Ltd IM00028...
Page 189 • On Set mode of SOF block. • Blocked SOTF LN • Test This parameter is visible only when Allow setting of individual LN mode • Test/Blocked mode is enabled in General menu. • Off © Arcteq Relays Ltd IM00028...
Page 190 INIT, BLOCKED, ACTIVE and TRIP events. Table. 4.5.6 - 142. Event messages. Event block name Event names SOF1 SOTF Init ON SOF1 SOTF Init OFF SOF1 SOTF Block ON © Arcteq Relays Ltd IM00028...
Page 191: Milliampere Output Control
• the simplest option to connect and configure • uses less wiring and connections than other signals, thus greatly reducing initial setup costs • good for travelling long distances, as current does not degrade over long connections like voltage does © Arcteq Relays Ltd IM00028...
Page 192 The second input point in the mA output 0.001 …10 value 2 control curve. Scaled The mA output value when the measured value mA output 0.0000…24.0000mA 0.0001mA 0mA is equal to or greater than Input value 2. value 2 © Arcteq Relays Ltd IM00028...
Page 193 Displays the input value of the selected mA 0.001 …10 Magnitude now output channel at that moment. mA Out Channel Displays the output value of the selected mA 0.0000…24.0000mA 0.0001mA Outputs now output channel at that moment. © Arcteq Relays Ltd IM00028...
Page 194: Programmable Control Switch
I/O controlling and user logic programming. Table. 4.5.8 - 150. 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 Switch 4 ON © Arcteq Relays Ltd IM00028...
Page 195: User Buttons
Range Step Default Description Analog input • Disabled Disabled Enables and disables the input. scaling • Activated Scaling curve • Disabled Enables and disables the scaling curve and Disabled 1...10 • Activated the input measurement. © Arcteq Relays Ltd IM00028...
Page 196 Curve1...10 input 000.00...1 000 0.00001 0 is above the set limit, "ASC1...4 input out of maximum 000.00 range" is activated. -1 000 Curve1...10 output 000.00...1 000 0.00001 - Displays the output of the curve. 000.00 © Arcteq Relays Ltd IM00028...
Page 197 Scales the measured milliampere signal at Point 2..10 Allows the user to create their own curve with up to twenty • Not used curvepoint (20) curve points, instead of using a linear curve between two • Used used 3...20 points. © Arcteq Relays Ltd IM00028...
Page 198: Logical Outputs
Table. 4.5.11 - 153. Logical output user description. Name Range Default Description User editable Logical 1...31 Description of the logical output. This description is used in description output characters several menu types for easier identification. LO1...64 1...64 © Arcteq Relays Ltd IM00028...
Page 199: Logical Inputs
Figure. 4.5.12 - 82. Operation of logical input in "Hold" and "Pulse" modes. A logical input pulse can also be extended by connecting a DELAY-low gate to a logical output, as has been done in the example figure below. © Arcteq Relays Ltd IM00028...
Page 200 1...32 NOTICE! TICE! After editing user descriptions the event history will start to use the new description only after resetting the HMI. HMI can be reset from General → Device info → HMI restart . © Arcteq Relays Ltd IM00028...
Page 201: Monitoring Functions
• None of the three-phase currents exceeds the I high limit setting. • At least one of the three-phase currents exceeds the I low limit setting. • At least one of the three-phase currents are below the I low limit setting. © Arcteq Relays Ltd IM00028...
Page 202 The function supervises the angle of each current measurement channel. Positive sequence current and negative sequence currents are calculated from the phase currents. The user can select what is used for the residual current measurement: nothing, the I01 channel, or the I02 channel. © Arcteq Relays Ltd IM00028...
Page 203 The reset ratio of 97 % and 103% are built into the function and is always relative to the value. The setting value is common for all measured amplitudes, and when the I exceeds the value (in single, dual or all currents) it triggers the pick-up operation of the function. © Arcteq Relays Ltd IM00028...
Page 204 • Blocked Displays the mode of CTS block. • Test CTS LN behaviour This parameter is visible only when Allow setting of individual • Test/ LN mode is enabled in General menu. Blocked • Off © Arcteq Relays Ltd IM00028...
Page 205 "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 206 Figure. 4.6.1 - 87. 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 207 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 208 Figure. 4.6.1 - 91. 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 209 Figure. 4.6.1 - 93. 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 210 Table. 4.6.1 - 161. Event messages. Event block name Event names CTS1 Alarm ON CTS1 Alarm OFF CTS1 Block ON CTS1 Block OFF CTS2 Alarm ON CTS2 Alarm OFF CTS2 Block ON CTS2 Block OFF © Arcteq Relays Ltd IM00028...
Page 211: Current Total Harmonic Distortion (Thd)
Figure. 4.6.2 - 95. THD calculation formulas. While both of these formulas exist, the power ratio ( THD ) is recognized by the IEEE, and the amplitude ratio ( THD ) is recognized by the IEC. © Arcteq Relays Ltd IM00028...
Page 212 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 213 The pick-up setting for the THD alarm element from the residual 0.10…100.00% 0.01% 10.00% current I01. The measured THD value has to exceed this setting pick-up in order for the alarm signal to activate. © Arcteq Relays Ltd IM00028...
Page 214 Table. 4.6.2 - 167. Settings for operating time characteristics. Name Range Step Default Description Phase THD Defines the delay for the alarm timer from the phase 0.000…1800.000s 0.005s 10.000s alarm delay currents' measured THD. © Arcteq Relays Ltd IM00028...
Page 215 ON event process data for START, ALARM and BLOCKED. The table below presents the structure of the function's register content. Table. 4.6.2 - 169. Register content. Register Description Date and time dd.mm.yyyy hh:mm:ss.mss © Arcteq Relays Ltd IM00028...
Page 216: Disturbance Recorder (Dr)
(CT card 2) IL3” Residual current I coarse* (CT card 2) I01”c I01”f Residual current I fine* (CT card 2) Residual current I coarse* (CT card 2) I02”c I02”f Residual current I fine* (CT card 2) © Arcteq Relays Ltd IM00028...
Page 217 Table below lists performance of both channels with fine and coarse gain. Table. 4.6.3 - 171. Residual current channel performance with coarse or residual gain. Channel Coarse gain range Fine gain range Fine gain peak 0...150 A 0...10 A 15 A © Arcteq Relays Ltd IM00028...
Page 218 Phase-to-phase current I0x (I01, current TRMS (IL1, P-P curr.I0x I02) IL2, IL3) Voltages Ux voltage in per-unit Magnitude of the system voltage Ux Volt p.u. values (U1, U2, U3, System volt ULxx mag ULxx (UL12, UL23, UL31) © Arcteq Relays Ltd IM00028...
Page 219 Current p.u. Current Pri. I0x (I01, I02) unit values I0x Residual I0x residual resistive Secondary resistive current ILx Resistive Current current in per-unit ILx Resistive Current Sec. (IL1, IL2, IL3) p.u. values (I01, I02) © Arcteq Relays Ltd IM00028...
Page 220 B f meas qlty Quality of tracked frequency susceptance (Pri) Indicates which of the three voltage Neutral Primary neutral f meas from or current channel frequencies is admittance Y (Pri) admittance used by the device. © Arcteq Relays Ltd IM00028...
Page 221 Phase rotating order at the moment. MBIO ModB Channel 1...8 of MBIO Mod control 0=A-B-C, 1=A- If true ("1") the phase order is Ch x Invalid C is invalid reversed. NOTICE! TICE! Digital channels are measured every 5 ms. © Arcteq Relays Ltd IM00028...
Page 222 Max. location of Displays the highest pre-triggering time that can be set with the settings 0.000...1800.000s the pre- currently in use. trigger Recordings 0…100 Displays how many recordings are stored in the memory. in memory © Arcteq Relays Ltd IM00028...
Page 223 The disturbance recorder is not ready unless the "Max. length of a recording" parameter is showing some value other than zero. At least one trigger input has to be selected in the "Recorder Trigger" setting to fulfill this term. © Arcteq Relays Ltd IM00028...
Page 224 The recorder is configured by using the setting tool software or device 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 225 ) . Alternatively, the user can load the recordings individually ( Disturbance recorder → DR List ) from a folder in the PC's hard disk drive; the exact location of the folder is described in Tools → Settings → DR path . © Arcteq Relays Ltd IM00028...
Page 226: Event Logger
Version: 2.11 The user can also launch the AQviewer software from the Disturbance recorder menu. AQviewer software instructions can be found in AQtivate 200 Instruction manual (arcteq.fi./downloads/). Events The disturbance recorder function (abbreviated "DR" in event block names) generates events and registers from the status changes in the events listed below.
Page 227: Measurement Recorder
The setting tool estimates the maximum recording time, which depends on the recording interval. When the measurement recorder is running, the measurements can be viewed in graph form with the AQtivate PRO software (see the image below). © Arcteq Relays Ltd IM00028...
Page 228 V V olta oltage mea ge measur surements ements L2 Imp.React.Cap.E.Mvarh Res.Curr.I01 TRMS Pri U1Volt Pri L2 Imp.React.Cap.E.kvarh Res.Curr.I02 TRMS Pri U2Volt Pri L2 Exp/Imp React.Cap.E.bal.Mvarh Sec.Pha.Curr.IL1 U3Volt Pri L2 Exp/Imp React.Cap.E.bal.kvarh Sec.Pha.Curr.IL2 U4Volt Pri L2 Exp.React.Ind.E.Mvarh © Arcteq Relays Ltd IM00028...
Page 229 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 Pha.L2 pow. THD U2Volt Angle Exp.React.Cap.E.kvarh Pha.L3 pow. THD U3Volt Angle Imp.React.Cap.E.Mvarh © Arcteq Relays Ltd IM00028...
Page 230 S2 Measurement I” Pri.Neg.Seq.Curr. System Volt UL31 ang S3 Measurement I” Pri.Zero.Seq.Curr. System Volt UL1 ang S4 Measurement Res.Curr.I”01 TRMS Pri System Volt UL2 ang S5 Measurement Res.Curr.I”02 TRMS Pri System Volt UL3 ang S6 Measurement © Arcteq Relays Ltd IM00028...
Page 231 L1 Exp.Active Energy kWh Curve1 Input Pha.IL”2 ampl. THD L1 Imp.Active Energy MWh Curve1 Output Pha.IL”3 ampl. THD L1 Imp.Active Energy kWh Curve2 Input Pha.IL”1 pow. THD L1 Exp/Imp Act. E balance MWh Curve2 Output © Arcteq Relays Ltd IM00028...
Page 232: Fault Register
The user can set up to eight (8) magnitudes to be recorded when the function is triggered. An overcurrent fault type, a voltage fault type, and a tripped stage can be recorded and reported straight to SCADA. © Arcteq Relays Ltd IM00028...
Page 233 The tan (φ) of three-phase powers and phase powers. tanfiL3 cosfi3PH, cosfiL1, cosfiL2, The cos (φ) of three-phase powers and phase powers. cosfiL3 Impedances and admit Impedances and admittances tances Descrip Description tion © Arcteq Relays Ltd IM00028...
Page 234 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 235 • U1/2 >>>> Trip • U0> Trip • U0>> Trip • U0>>> Trip • U0>>>> Trip • A-G • B-G • A-B Overcurrent fault type • C-G The overcurrent fault type. • A-C • B-C • A-B-C © Arcteq Relays Ltd IM00028...
Page 236 ON, OFF, or both. The events triggered by the function are recorded with a time stamp. Table. 4.6.6 - 180. Event messages. Event block name Event name VREC1 Recorder triggered ON VREC1 Recorder triggered OFF © Arcteq Relays Ltd IM00028...
Page 237: Communica A Tion
Ethernet connection. Virtual Ethernet has its own separate IP address and network configurations. All Ethernet-based protocol servers listen for client connections on the IP addresses of both the physical Ethernet and the Virtual Ethernet. © Arcteq Relays Ltd IM00028...
Page 238 Bitrate used by serial fiber channels. • 38400bps Databits 7...8 Databits used by serial fiber channels. • None Parity • Even Paritybits used by serial fiber channels. • Odd Stopbits 1...2 Stopbits used by serial fiber channels. © Arcteq Relays Ltd IM00028...
Page 239: Time Synchronization
→ Synchronization → General . Table. 5.2 - 186. General time synchronization source settings. Name Range Description • Internal • External NTP Time synchronization source • External serial Selection of time synchronization source. • IRIG-B • PTP © Arcteq Relays Ltd IM00028...
Page 240: Internal
Grandmaster clock. In the PTP network there can also be Boundary and Transparent clock roles, these are most often PTP enabled switches that can redistribute time or compensate for their delays. © Arcteq Relays Ltd IM00028...
Page 241 Clock class or frequency distributed by the Grandmaster PTP Instance Clock The expected accuracy of a PTP Instance when it is the Grandmaster PTP accuracy Instance, or in the event it becomes the Grandmaster PTP Instance © Arcteq Relays Ltd IM00028...
Page 242: Communication Protocols
AQ-25x frame units support both Edition 1 and 2 of IEC 61850. 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 243 Reactive 0.1…1000.0 Determines the data reporting deadband 2 kVar energy deadband kVar kVar settings for this measurement. 0.1…1000.0 Determines the data reporting deadband Active power deadband 2 kW settings for this measurement. © Arcteq Relays Ltd IM00028...
Page 244: Logical Device Mode And Logical Node Mode
• LNBeh can be reported through Beh data object in all logical nodes. • LDMod is only visible through logical node zero's Mod data object (LLN0.Mod). Mode and behavior values There are 5 values defined for mode and behavior: On, Blocked, Test, Test / Blocked and Off. © Arcteq Relays Ltd IM00028...
Page 245 Table. 5.3.1.1 - 193. All possible logical device and logical node combinations. LDMod LNMod LNBeh Test / Blocked Test Blocked Test / Blocked Test / Blocked Test / Blocked Test Test / Blocked Blocked Test / Blocked Test / Blocked © Arcteq Relays Ltd IM00028...
Page 246 Processed as Processed as Processed as Processed as Questionable questionable questionable questionable questionable processed q.test = False q.validity = Good Processed as Processed as Processed as Processed as invalid invalid valid valid processed q.test = True © Arcteq Relays Ltd IM00028...
Page 247 “Processed as questionable” and “Processed as invalid” in the same way with “Not processed”. Only "Processed as valid" is passed to the application. Table. 5.3.1.1 - 195. Arcteq's implementation of processing of incoming data in different behaviors. Blocked...
Page 248: Goose
• Off 5.3.1.2 GOOSE Arcteq devices 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 For other publishers, non-simulated frames are accepted normally (given no simulated frame is received from that publisher). This behavior ends when the setting is set back to No. GOOSE input settings The table below presents the different settings available for all 64 GOOSE inputs. © Arcteq Relays Ltd IM00028...
Page 250 Table. 5.3.1.2 - 202. GOOSE input user description. Name Range Default Description User editable 1...31 GOOSE Description of the GOOSE input. This description is used in several description GI x characters IN x menu types for easier identification. © Arcteq Relays Ltd IM00028...
Page 251 GOOSE signals generate events from status changes. 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. The time stamp resolution is 1 ms. © Arcteq Relays Ltd IM00028...
Page 252: Modbus/Tcp And Modbus/Rtu
1. Some masters might begin numbering holding register from 0 instead of 1; this will cause an offset of 1 between the device and the master. Modbus map can be edited with Modbus Configurator ( Tools → Communication → Modbus Configurator ). © Arcteq Relays Ltd IM00028...
Page 253: Iec 103
TE: Once the configuration file has been loaded, the IEC 103 map of the device can be found in the AQtivate software ( Tools → IEC 103 map ). The following table presents the setting parameters for the IEC 103 protocol. © Arcteq Relays Ltd IM00028...
Page 254: Iec 101/104
Table. 5.3.4 - 208. IEC 104 settings. Name Range Step Default Description IEC 104 • Disabled Disabled Enables and disables the IEC 104 communication protocol. enable • Enabled IP port 0…65 535 2404 Defines the IP port used by the protocol. © Arcteq Relays Ltd IM00028...
Page 255 • 1/10 000 Power factor • 1/100 000 • 1/1 000 000 Frequency • 10 • 100 • 1000 Current • 10 000 • 100 000 Residual current • 1 000 000 Voltage Residual voltage Angle © Arcteq Relays Ltd IM00028...
Page 256: Spa
The full SPA signal map can be found in AQtivate ( Tools → SPA map ). The SPA event addresses can be found at Tools → Events and logs → Event list . © Arcteq Relays Ltd IM00028...
Page 257: Dnp3
Defines the length of the time-out for the link layer. time-out 000ms Link layer 1…20 Defines the number of retries for the link layer. retries Diagnostic Counts the total number of errors in received and sent - Error 0…2 messages. counter © Arcteq Relays Ltd IM00028...
Page 258 • Var 5 • Var 1 • Var 2 • Var 3 Group 32 variation (AI change) Var 5 Selects the variation of the analog signal change. • Var 4 • Var 5 • Var 7 © Arcteq Relays Ltd IM00028...
Page 259: Modbus I/O
Range Description I/O module Defines the Modbus unit address for the selected I/O Module (A, B, or C). If 0…247 X address this setting is set to "0", the selected module is not in use. © Arcteq Relays Ltd IM00028...
Page 260: Analog Fault Registers
FLX (Fault locator) Select • TRIP signal Selects what triggers the fault register recording: TRIP record • START signal the selected function's TRIP signal, its START signal trigger • START and TRIP signals signal, or either one. © Arcteq Relays Ltd IM00028...
Page 261: Modbus Gateway
Arc protection relays AQ-103 and AQ-103 LV Modbus variant is designed to work as a sub unit with Modbus Gateway master. More details about AQ-103 and AQ-103 LV capabilities and how to set them up can be found in AQ-103 Instruction manual (arcteq.fi./downloads/). Also see application example at the end of this chapter.
Page 262 Meas x Describe bit 1...31 Acq. Bit User settable description for the signal. This description is used in signal x characters several menu types for easier identification. Describe doube Acq. bit signal x Binary x © Arcteq Relays Ltd IM00028...
Page 263 RTU. AQ-103 Modbus variant is able to report various signals like number of installed sensors, sensor activations, I/O activations etc. Holding registers of each signal can be found in the AQ-103 instruction manual. © Arcteq Relays Ltd IM00028...
Page 264 Figure. 5.5 - 102. To report imported bit signals to SCADA the signals must be connected to a logical output. © Arcteq Relays Ltd IM00028...
Page 265 A A Q Q -T256 -T256 5 Communication Instruction manual Version: 2.11 Figure. 5.5 - 103. Example mimic where sensor activation location is indicated with a symbol. © Arcteq Relays Ltd IM00028...
Page 266: Connections Of Aq-T256
A A Q Q -T256 -T256 6 Connections and application examples Instruction manual Version: 2.11 6 Connections and application examples 6.1 Connections of AQ-T256 Figure. 6.1 - 104. AQ-T256 variant without add-on modules. © Arcteq Relays Ltd IM00028...
Page 267 A A Q Q -T256 -T256 6 Connections and application examples Instruction manual Version: 2.11 Figure. 6.1 - 105. AQ-T256 variant with digital input and output modules. © Arcteq Relays Ltd IM00028...
Page 268: Application Example And Its Connections
A A Q Q -T256 -T256 6 Connections and application examples Instruction manual Version: 2.11 Figure. 6.1 - 106. 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>...
Page 269: 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 270 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 271 (in an open state) cannot be monitored as the digital input is shorted by the device's trip output. Figure. 6.3 - 111. Trip circuit supervision with one DI and one latched output contact. © Arcteq Relays Ltd IM00028...
Page 272 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. Figure. 6.3 - 112. Example block scheme. © Arcteq Relays Ltd IM00028...
Page 273: 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. 7.1 - 113. Modular construction of AQ-X256-XXXXXXX-AAAAAAAAAA © Arcteq Relays Ltd IM00028...
Page 274 In field upgrades, therefore, add-on modules 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 275 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 276 (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 devices. © Arcteq Relays Ltd IM00028...
Page 277: Cpu Module
Output relay 2, with a normally open (NO) contact. X1-9:10 Output relay 3, with a normally open (NO) contact. X1-11:12 Output relay 4, with a normally open (NO) contact. X1-13:14:15 Output relay 5, with a changeover contact. © Arcteq Relays Ltd IM00028...
Page 278 Digital input and output descriptions CPU card digital inputs and outputs can be given a description. The user defined description are displayed in most of the menus: • logic editor © Arcteq Relays Ltd IM00028...
Page 279: Current Measurement Module
TICE! The mechanical delay of the relay is no not t included in these approximations! 7.3 Current measurement module Figure. 7.3 - 117. Module connections with standard and ring lug terminals. {{Default-Series}}. 7.3 - 1. © Arcteq Relays Ltd IM00028...
Page 280 64 samples/cycle when the system frequency ranges from 6 Hz to 75 Hz. For further details please refer to the "Current measurement" chapter in the “Technical data” section of this document. © Arcteq Relays Ltd IM00028...
Page 281: Option Cards
1 V. All digital inputs are scannced in 5 ms program cycles, and their pick-up and release delays as well as their NO/NC selection can be set with software. © Arcteq Relays Ltd IM00028...
Page 282 (NC) defines whether or not the digital input is considered activated when the digital input channel is energized. The diagram below depicts the digital input states when the input channels are energized and de- energized. © Arcteq Relays Ltd IM00028...
Page 283 Control → Device IO → Digital inputs → Digital input voltages . Table. 7.4.1 - 226. 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 284: Digital Output Module (Optional)
For technical details please refer to the chapter titled "Digital output module" in the "Technical data" section of this document. Digital output descriptions Option card outputs can be given a description. The user defined description are displayed in most of the menus: • logic editor • matrix © Arcteq Relays Ltd IM00028...
Page 285: Point Sensor Arc Protection Module (Optional)
Figure. 7.4.3 - 121. Arc protection module. Table. 7.4.3 - 228. Module connections. Connector Description Light sensor channels 1…4 with positive ("+"), sensor ("S") and earth connectors. HSO2 (+, NO) Common battery positive terminal (+) for the HSOs. © Arcteq Relays Ltd IM00028...
Page 286 BI1, HSO1 and HSO2 are not visible in the Binary inputs and Binary outputs menus ( Control → Device I/O ), they can only be programmed in the arc matrix menu ( Protection → Arc protection → I/O → Direct output control and HSO control ). © Arcteq Relays Ltd IM00028...
Page 287: 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 288: Serial Rs-232 Communication Module (Optional)
Description • Serial-based communications • Wavelength 660 nm Serial fiber (GG/PP/ COM E • Compatible with 50/125 μm, 62.5/125 μm, 100/140 μm, and 200 μm GP/PG) Plastic-Clad Silica (PCS) fiber • Compatible with ST connectors © Arcteq Relays Ltd IM00028...
Page 289 COM F – Clock sync GND Clock synchronization input Pin 12 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. © Arcteq Relays Ltd IM00028...
Page 290: Lc Or Rj45 100 Mbps Ethernet Communication Module (Optional)
• Communication port D, 100 Mbps LC fiber connector. • RJ-45 connectors COM D: • 62.5/125 μm or 50/125 μm multimode (glass). • 10BASE-T and 100BASE-TX • Wavelength 1300 nm. Both cards support both HSR and PRP protocols. © Arcteq Relays Ltd IM00028...
Page 291: Double St 100 Mbps Ethernet Communication Module (Optional)
For other redundancy options, please refer to the option card "LC 100 Mbps Ethernet communication module". 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. © Arcteq Relays Ltd IM00028...
Page 292 A A Q Q -T256 -T256 7 Construction and installation Instruction manual Version: 2.11 Figure. 7.4.7 - 127. Example of a ring configuration. Figure. 7.4.7 - 128. Example of a multidrop configuration. © Arcteq Relays Ltd IM00028...
Page 293: Double Rj45 10/100 Mbps Ethernet Communication Module (Optional)
• Two Ethernet ports RJ-45 connectors • RJ-45 connectors • 10BASE-T and 100BASE-TX This option card supports multidrop configurations. For other redundancy options, please refer to the option card "LC 100 Mbps Ethernet communication module". © Arcteq Relays Ltd IM00028...
Page 294: Milliampere Output (Ma) I/O Module (Optional)
Pin 1 mA OUT 1 + connector (0…24 mA) Pin 2 mA OUT 1 – connector (0…24 mA) Pin 3 mA OUT 2 + connector (0…24 mA) Pin 4 mA OUT 2 – connector (0…24 mA) © Arcteq Relays Ltd IM00028...
Page 295: Milliampere Input (Ma) I/O Module (Optional)
Pin 2 mA OUT 1 – connector (0…24 mA) Pin 3 mA OUT 2 + connector (0…24 mA) Pin 4 mA OUT 2 – connector (0…24 mA) Pin 5 mA OUT 3 + connector (0…24 mA) © Arcteq Relays Ltd IM00028...
Page 296: 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. 7.5 - 133. Device dimensions. © Arcteq Relays Ltd IM00028...
Page 297 A A Q Q -T256 -T256 7 Construction and installation Instruction manual Version: 2.11 Figure. 7.5 - 134. Device installation. © Arcteq Relays Ltd IM00028...
Page 298 A A Q Q -T256 -T256 7 Construction and installation Instruction manual Version: 2.11 Figure. 7.5 - 135. Panel cut-out and spacing of the devices. © Arcteq Relays Ltd IM00028...
Page 299: Technic Echnical Da Al Data Ta
< ±0.2° (I> 0.1 A) Angle measurement inaccuracy < ±1.0° (I≤ 0.1 A) Burden (50/60 Hz) <0.1 VA Transient overreach <8 % Coarse residual current input (I01) Rated current I 1 A (configurable 0.1…10 A) © Arcteq Relays Ltd IM00028...
Page 300 Max 8mm diameter, with minimum 3,5mm screw hole NOTICE! TICE! Current measurement accuracy has been verified with 50/60 Hz. The amplitude difference is 0.2 % and the angle difference is 0.5 degrees higher at 16.67 Hz and other frequencies. © Arcteq Relays Ltd IM00028...
Page 301: Frequency Measurement
< 20 W (no option cards) Power consumption < 40 W (maximum number of option cards) Maximum permitted interrupt time < 40 ms with 110 VDC DC ripple < 15 % Other Minimum recommended fuse rating MCB C2 © Arcteq Relays Ltd IM00028...
Page 302: Cpu Communication Ports
Port media Copper Ethernet RJ-45 Number of ports Features IEC 61850 IEC 104 Modbus/TCP Port protocols DNP3 Telnet Data transfer rate 100 MB/s System integration Can be used for system protocols and for local programming © Arcteq Relays Ltd IM00028...
Page 303: Cpu Digital Inputs
8.1.2.4 CPU digital outputs Table. 8.1.2.4 - 238. Digital outputs (Normally Open) Rated values Rated auxiliary voltage 265 V (AC/DC) Continuous carry Make and carry 0.5 s 30 A Make and carry 3 s 15 A © Arcteq Relays Ltd IM00028...
Page 304: Option Cards
5…265 V (AC/DC) Current drain 2 mA Scanning rate 5 ms Activation/release delay 5...11 ms Settings Pick-up threshold Software settable: 16…200 V, setting step 1 V Release threshold Software settable: 10…200 V, setting step 1 V © Arcteq Relays Ltd IM00028...
Page 305: Digital Output Module
Software settable: Normally On/Normally Off Terminal block connection Screw connection terminal block (standard) Phoenix Contact MSTB 2,5/10-ST-5,08 Spring cage terminals block (option) Phoenix Contact FKC 2,5/10-STF-5,08 Solid or stranded wire Nominal cross section 2.5 mm © Arcteq Relays Ltd IM00028...
Page 306: Point Sensor Arc Protection Module
Polarity Normally Off Contact material Semiconductor Table. 8.1.3.3 - 244. Binary input channel Rated values Voltage withstand 265 VDC Nominal voltage 24 VDC Pick-up threshold ≥16 VDC Release threshold ≤15 VDC Scanning rate 5 ms © Arcteq Relays Ltd IM00028...
Page 307: Milliampere Output Module (Ma Out & Ma In)
Update cycle time inaccuracy Max. +20 ms above the set cycle mA input scaling range 0...4000 mA Output scaling range -1 000 000.0000…1 000 000.0000, setting step 0.0001 mA output Inaccuracy @ 0...24 mA ±0.01 mA © Arcteq Relays Ltd IM00028...
Page 308: Milliampere Input Module (Ma Out & Ma In)
-1 000 000.000…1 000 000.0000, setting step 0.0001 Terminal block connection Screw connection terminal block (standard) Phoenix Contact MSTB 2,5/10-ST-5,08 Spring cage terminals block (option) Phoenix Contact FKC 2,5/10-STF-5,08 Solid or stranded wire 2.5 mm Nominal cross section © Arcteq Relays Ltd IM00028...
Page 309: Rtd Input Module
Serial fiber (GG/PP/GP/PG) Serial port wavelength 660 nm Cable type 1 mm plastic fiber Terminal block connections Spring cage terminals block Phoenix Contact DFMC 1,5/ 6-STF-3,5 Solid or stranded wire Nominal cross section 1.5 mm © Arcteq Relays Ltd IM00028...
Page 310: Double Lc 100 Mbps Ethernet Communication Module
Transmitter wavelength 1260…1360 nm (nominal: 1310 nm) Receiver wavelength 1100…1600 nm Maximum distance 2 km IRIG-B Connector Screw connection terminal block Phoenix Contact MC 1,5/ 2-ST-3,5 BD:1-2 Solid or stranded wire Nominal cross section 1.5 mm © Arcteq Relays Ltd IM00028...
Page 311: Display
Definite time function operating time setting 0.00…1800.00 s, setting step 0.005 s Inaccuracy: - Definite time: I ratio > 3 ±1.0 % or ±20 ms - Definite time: I ratio = 1.05…3 ±1.0 % or ±30 ms © Arcteq Relays Ltd IM00028...
Page 312: Non-Directional Earth Fault Protection (I0>; 50N/51N)
±3 mA (0.005…10.0 × I - Starting I01 (1 A) - Starting I02 (0.2 A) ±1.5 %I0 or ±1.0 mA (0.005…25.0 × I - Starting I0Calc (5 A) ±1.0 %I0 or ±15 mA (0.005…4.0 × I Operating time © Arcteq Relays Ltd IM00028...
Page 313: Negative Sequence Overcurrent/ Phase Current Reversal/ Current Unbalance Protection (I2>; 46/46R/46L)
Current input calculations Negative sequence current (I2) Pick-up Negative sequence component I2pu Used magnitude Relative unbalance I2/I1 0.01…40.00 × I , setting step 0.01 × I (I2pu) Pick-up setting 1.00…200.00 %, setting step 0.01 % (I2/I1) © Arcteq Relays Ltd IM00028...
Page 314: Harmonic Overcurrent Protection (Ih>; 50H/51H/68H)
, 15 , 17 or 19 Harmonic per unit (× I Used magnitude Harmonic relative (Ih/IL) 0.05…2.00 × I , setting step 0.01 × I (× I Pick-up setting 5.00…200.00 %, setting step 0.01 % (Ih/IL) © Arcteq Relays Ltd IM00028...
Page 315: Circuit Breaker Failure Protection (Cbfp; 50Bf/52Bf)
Table. 8.2.1.5 - 257. Technical data for the circuit breaker failure protection function. Measurement inputs Phase current inputs: I (A), I (B), I Current inputs Residual current channel I (Coarse) Residual current channel I (Fine) © Arcteq Relays Ltd IM00028...
Page 316: Transformer Thermal Overload Protection (Tt>; 49T)
, step 0.01 × I Service factor (maximum overloading) - Ambient temperature (Set –60.0…500.0 deg, step 0.1 deg, and RTD) Thermal model biasing - Negative sequence current Thermal replica temperature estimates Selectable between ºC and ºF Outputs © Arcteq Relays Ltd IM00028...
Page 317: Transformer Status Monitoring
±0.5 % or ±10 ms 8.2.1.8 Resistance temperature detectors (RTD) Table. 8.2.1.8 - 260. Technical data of the resistance temperature detectors. Inputs Resistance input magnitudes Measured temperatures measured by RTD sensors RTD channels 12 individual RTD channels © Arcteq Relays Ltd IM00028...
Page 318: Generator/Transformer Differential Protection (Idb>/Idi>/I0Dhv>/I0Dlv>; 87T/87N/87G)
0.01…50.00 %, step 0.01 %, default 35.00 % harmonic blocking pick-up Inaccuracy: ±3.0 %ISET or ±75 mA (0.10…4.0 x ISET) - Differential current ±1.5 %I SIDE1 harmonic Instant operation time Instant operation time >1.05 × I <40 ms (Harmonic blocking active) © Arcteq Relays Ltd IM00028...
Page 319: Arc Fault Protection (Iarc>/I0Arc>; 50Arc/50Narc) (Optional)
Typically 10 ms (6.5…15 ms) - Regular relay outputs Light + current criteria (zone 1…4): - Semiconductor outputs HSO1 and Typically 10 ms (6.5…14 ms) HSO2 Typically 14 ms (10…18 ms) - Regular relay outputs © Arcteq Relays Ltd IM00028...
Page 320: Control Functions
Open command output Operation time Breaker traverse time setting 0.02…500.00 s, setting step 0.02 s Max. close/open command pulse length 0.02…500.00 s, setting step 0.02 s Control termination time out setting 0.02…500.00 s, setting step 0.02 s © Arcteq Relays Ltd IM00028...
Page 321: Indicator Object Monitoring
8.2.2.4 Cold load pick-up (CLPU) Table. 8.2.2.4 - 267. Technical data for the cold load pick-up function. Measurement inputs Phase current inputs: I (A), I (B), I Current inputs Current input magnitudes RMS phase currents Pick-up © Arcteq Relays Ltd IM00028...
Page 322: Switch-On-To-Fault (Sotf)
<40 ms (measured from the trip contact) SOTF release time Release time setting 0.000…1800.000 s, setting step 0.005 s Inaccuracy: - Definite time ±1.0 % or ±30 ms SOTF instant release time <40 ms (measured from the trip contact) © Arcteq Relays Ltd IM00028...
Page 323: Monitoring Functions
8.2.3.2 Current total harmonic distortion Table. 8.2.3.2 - 270. Technical data for the total harmonic distortion function. Input signals Phase current inputs: I (A), I (B), I Residual current channel I (Coarse) Current inputs Residual current channel I (Fine) © Arcteq Relays Ltd IM00028...
Page 324: Disturbance Recorder
The maximum length is determined by the chosen signals. 0…100, 60 MB of shared flash memory reserved Number of The maximum number of recordings according to the chosen signals and operation time recordings setting combined © Arcteq Relays Ltd IM00028...
Page 325: Event Logger
EN 60255-26, IEC 61000-4-6 Table. 8.3 - 274. Voltage tests. Dielectric voltage test EN 60255-27, IEC 60255-5, EN 60255-1 2 kV, 50 Hz, 1 min Impulse voltage test EN 60255-27, IEC 60255-5 5 kV, 1.2/50 µs, 0.5 J © Arcteq Relays Ltd IM00028...
Page 326 Temperature ranges Ambient service temperature range –35…+70 °C Transport and storage temperature range –40…+70 °C Other Altitude <2000 m Overvoltage category Pollution degree Casing and package Table. 8.3 - 278. Dimensions and weight. Without packaging (net) © Arcteq Relays Ltd IM00028...
Page 327 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 328: Ordering Inf Dering Informa Ormation Tion
Requires an external 24 VDC AX007 configured supply. External 8-ch Thermocouple mA Input module, pre- Requires an external 24 VDC AX008 configured supply. AX013 AQ-250 series raising frame 120mm AQX014 AQ-250 series raising frame 40mm © Arcteq Relays Ltd IM00028...
Page 329 Max. cable length 200 m AQ-02B Pressure and light point sensor unit (25,000 lux threshold) Max. cable length 200 m AQ-02C Pressure and light point sensor unit (50,000 lux threshold) Max. cable length 200 m © Arcteq Relays Ltd IM00028...
Page 330: 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.com Technical support: arcteq.com/support-login +358 10 3221 388 (EET 9:00 – 17.00) E-mail (sales): sales@arcteq.fi © Arcteq Relays Ltd IM00028...

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