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Arcteq AQ-T257 Instruction Manual

Transformer protection ied
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AQ-T257
Transformer protection IED
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Summary of Contents for Arcteq AQ-T257

  • Page 1 AQ-T257 Transformer protection IED Instruction manual  ...

  • Page 2: Table Of Contents

    5.1. Functions included in AQ-T257 ........
  • Page 3 7.1. Connections AQ-T257 ........
  • Page 4 11. Contact and reference information ..........© Arcteq Relays Ltd...
  • 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 ful l the aforementioned requirements.
  • Page 6 AQ-T257 Instruction manual Version: 2.00 Copyright Copyright © Arcteq Relays Ltd. 2018. All rights reserved. © Arcteq Relays Ltd...

  • Page 7: Manual Revision Notes

    -       Ring-lug CT card option description added -       New U> and U< function measurement modes documented -       Order code revised Revision 1.03 Date 14.8.2018 -       Added mA output option card description and ordercode Changes -       Added HMI display technical data © Arcteq Relays Ltd...

  • Page 8: Abbreviations

    RMS – Root mean square SF – System failure TMS – Time multiplier setting TRMS – True root mean square VAC – Voltage alternating current VDC – Voltage direct current SW – Software uP - Microprocessor © Arcteq Relays Ltd...

  • Page 9: General

    IO requirements and the software determines the available functions. This manual describes the speci c applications of the AQ-T257 Transformer Protection IEDs. For other AQ-200 series products please consult corresponding device manuals.

  • Page 10: Ied User Interface

    Used views are freely con gurable with buttons for changing settings groups or controlling the relays logic in general. Object status (Circuit breaker/Disconnector) can be displayed on the screen. All measured and calculated values (currents, voltages, power, energy, frequency etc.) can be shown in the screen. © Arcteq Relays Ltd...

  • Page 11: User Level Password Con Guration

    Con gurator: Can change most settings like basic protection pick-up levels or time delays, breaker control functions, signal descriptions etc. Can operate breakers or other equipment. Super user: Access to change any setting and can operate breakers or other equipment. © Arcteq Relays Ltd...

  • Page 12: Functions

    Instruction manual Version: 2.00 5. Functions 5.1. Functions included in AQ-T257 This chapter presents the functions of AQ-T257 Transformer Protection IED. AQ-T257 includes following functions and amounts of instances of the functions. Table. 5.1. - 1. Protection functions of AQ-T257 Name ANSI...

  • Page 13: Measurements

    Rate-of-change of frequency protection (8 stages) PGS1 PGx >/< Programmable stage ARC1 IArc>/I0Arc> 50Arc/50NArc Arc protection (Option) Table. 5.1. - 2. Control functions of AQ-T257 Name ANSI Description Set group settings Object control ΔV/Δa/Δf Synchrocheck Voltage regulator (Function package) Table.
  • Page 14 By knowing the transformer nominal current it makes the unit protection a lot easier and straight forward. In modern protection devices this scaling calculation is done internally after the current transformer primary, secondary and machine nominal currents are known. © Arcteq Relays Ltd...
  • Page 15 In following chapter is given example for the scaling of the relay measurements to the example current transformers and nominal load. CT scaling example (application 1) The connection of CTs to the IED measurement inputs and the ratings of the current transformers and transformer nominal current are as in following gure. © Arcteq Relays Ltd...
  • Page 16 Protection → TrafoModule → Idx> [87T,87N] → Settings has to be set as “Subtract”. Due to this the direction of measured currents are checked correctly from the relay perspective. Initial data of the connection and the ratings are presented in following table. © Arcteq Relays Ltd...
  • Page 17 As it can be seen in the gure above, the high voltage side nominal current is calculated to be 669.2A and the low voltage side current is 5888.97A. These nominal currents are calculated as follow: Per unit values for high –and low voltage side nominal currents can be calculated as shown below: © Arcteq Relays Ltd...
  • Page 18 Figure. 5.2.1. - 7. Residual current I02 scaling to ring core CT input. CT scaling example (application 2) The connection of CTs to the IED measurement inputs and the ratings of the current transformers and transformer nominal current are as in following gure. © Arcteq Relays Ltd...
  • Page 19 Initial data of the connection and the ratings are presented in following table. Table. 5.2.1. - 5. Initial data from example connection. Machine nominal power: 153MVA Machine high voltage side nominal  amplitude: 132kV Machine low voltage side nominal  amplitude: 15kV © Arcteq Relays Ltd...
  • Page 20 1:Object p.u. MACHINE PROTECTION). In p.u. Phase CT 1… 0.1A 100.0A Rated primary current of the CT in amperes. primary 5000.0A Phase CT 0.2… 0.1A 5.0A Rated secondary current of the CT in amperes. secondary 10.0A © Arcteq Relays Ltd...
  • Page 21 IED feedback value, this is the calculated scaling factor for primary /secondary factor P/S current ratio Measurements Following measurements are available from the measured current channels. Table. 5.2.1. - 9. Per unit phase current measurements Name Range Step Description © Arcteq Relays Ltd...
  • Page 22 Primary residual 0.00… Primary measurement from residual current channel I01 fundamental 0.01A current I01 1000000.0A frequency RMS current. Primary residual 0.00… Primary measurement from residual current channel I02 fundamental 0.01A current I02 1000000.0A frequency RMS current. © Arcteq Relays Ltd...
  • Page 23 Table. 5.2.1. - 19. Secondary sequence current measurements Name Range Step Description Secondary Positive sequence 0.00… Secondary measurement from calculated positive sequence 0.01A current 300.0A current Secondary Negative sequence 0.00… Secondary measurement from calculated negative sequence 0.01A current 300.0A current © Arcteq Relays Ltd...

  • Page 24: Voltage Measurement And Scaling

    (protection function availability depends on IED type). For the measurements to be correct it is essential to understand the concept of the IEDs voltage measurements. Figure. 5.2.2. - 9. Voltage measurement terminology © Arcteq Relays Ltd...
  • Page 25 In case of incorrect wiring all polarities can be switched individually by 180 degrees in IED. If voltage based protection is used the supervised voltage may be based on line to line –or line to earth voltages. This selection is completed in each protection stage menu separately. © Arcteq Relays Ltd...
  • Page 26 3LN+U0. For further information see different voltage measurement mode examples below: 3LN+U4 3LL+U4 2LL+U3+U4 See below connection wirings for 3LL and 2LL connections. © Arcteq Relays Ltd...
  • Page 27 In the next gure is presented relay behavior when nominal voltage is injected to the relay and the IED is measuring line to neutral voltages. Part of the available information from the IED is presented as well: © Arcteq Relays Ltd...
  • Page 28 Measured voltage amplitude does not match for one measured phase or calculated U0 is measured when Wiring connections from injection device or VT:s to the IED. there should not be any. © Arcteq Relays Ltd...
  • Page 29 100.0V secondary 2LL+U3+U4 mode) U4 Res/SS VT 1…1000000V 0.1V 20000.0V Primary nominal voltage of connected U0 –or SS VT. primary U4 Res/SS VT 0.2…400V 0.1V 100.0V Secondary nominal voltage of connected U0 –or SS VT. secondary © Arcteq Relays Ltd...
  • Page 30 Ux Volt sec 0.01V 500.0xUn voltage. Secondary measurement from each voltage channel TRMS voltage including UxVolt TRMS 0.00… 0.01V 500.0xUn harmonics up to 31 Table. 5.2.2. - 26. Voltage phase angle measurements. Name Range Step Description © Arcteq Relays Ltd...
  • Page 31 System volt UL3 0.00… Primary measured or calculated fundamental frequency RMS line to neutral UL3 0.01V 1000000.00V voltage. System volt U0 0.00… Primary measured or calculated fundamental frequency RMS zero sequence U0 0.01V 1000000.00V voltage. © Arcteq Relays Ltd...

  • Page 32: Power And Energy Calculation

    Energy measurement is calculating magnitude for active and reactive energy. Energy can be flowing to forward (exported) or reverse (imported) direction. If unit has more than one CT measurement module it is possible to choose which side modules current measurement is used by power calculation. © Arcteq Relays Ltd...
  • Page 33 Direction of reactive power is divided in to four quadrants. Reactive power may be inductive or capacitive on both forward and reverse direction. Reactive power quadrant can be indicated simply by using Tan (φ) together with Cos(φ). Tangent phi is calculated according the following formula: © Arcteq Relays Ltd...
  • Page 34 Description 0:Disabled EP meas 3ph 0:Disabled Enable active energy measurement. 1:Enabled 0:Disabled EQ meas 3ph 0:Disabled Enable reactive energy measurement. 1:Enabled 0:Mega E 3ph M or k 0:Mega Measured energy in kilo –or mega values. 1:Kilo © Arcteq Relays Ltd...
  • Page 35 Table. 5.2.3. - 36. DC 1…4 Pulse out settings Name Range Step Default Description DC 1…4 Pulse out OUT1…OUTx None selected Controlled physical outputs selection. Power measurements Following power calculations are available when voltage and current cards are available. © Arcteq Relays Ltd...
  • Page 36 Phase L3 reactive power -1x10 …1x10 kVar L3 Tan(phi) 0.0001 Phase L3 active power direction -1x10 …1x10 L3 Cos(phi) 0.0001 Phase L3 reactive power direction -1x10 …1x10 L3 PF 0.0001 Phase L3 power factor -1x10 …1x10 © Arcteq Relays Ltd...
  • Page 37 Phase L1 total imported reactive inductive energy kVarh/MVarh kVarh/MVarh L1 Exp/Imp 0.01 Sum of imported and exported phase L1 reactive -1x10 …1x10 React.Ind.E.bal.MVarh kVarh/MVarh inductive energy kVarh/MVarh Table. 5.2.3. - 43. Phase L2 energy calculation Name Range Step Description © Arcteq Relays Ltd...
  • Page 38 Example for power calculation is represented here. Both wiring methods line to line –and line to neutral are checked with same signal injection. Voltage scaling is set to 20000:100V and current scaling is set to 1000:5A. Voltages (Line to neutral): Currents: =40.825V, 45.00° =2.500V, 0.00° =61.481V, -159.90° =2.500V, -120.00° © Arcteq Relays Ltd...
  • Page 39 L2 Tan -0.83 L3 Tan 0.11 3PH Tan 0.00 L1 Cos 0.71 L2 Cos 0.77 L3 Cos 0.99 3PH Cos 0.87 Voltages (Line to line): Currents: =100.00V, 30.00° =2.500V, 0.00° =100.00V, -90.00° =2.500V, -120.00° =2.500V, 120.00° © Arcteq Relays Ltd...

  • Page 40: Frequency Tracking And Scaling

    5% in the measured phase currents. From the gure can also be seen that when the frequency is tracked the measurement accuracy is about -0.2% - 0.1% error in the whole frequency range when the sampling is adjusted according to the detected system frequency. © Arcteq Relays Ltd...
  • Page 41 FFT calculation has always whole power cycle in the buffer. Further improvement for the achieved measurement accuracy is the Arcteq patented method of calibrating of the analog channels against 8 system frequency points for both, magnitude and angle. This frequency dependent correction compensates the used measurement hardware frequency dependencies.

  • Page 42: General Menu

    When this parameter is enabled it is possible for the user to force Enable stage protection, control and monitoring functions to different statuses like 0:Disabled 0:Disabled forcing START/TRIP. This is done in the function’s info-page with Status force 1:Enabled to parameter. © Arcteq Relays Ltd...

  • Page 43: Protection Functions

    CT saturation condition. The operational logic consists of input magnitude processing, input magnitude selection, saturation check, threshold comparator, block signal check, time delay characteristics and output processing. The basic design of the protection function is 3-pole operation. © Arcteq Relays Ltd...
  • Page 44 Selection of the used AI channel is made with a setting parameter. In all possible input channel variations pre-fault condition is presented with 20 ms averaged history value from -20 ms of Start or Trip event. © Arcteq Relays Ltd...
  • Page 45 Table. 5.4.1. - 52. Internal inrush harmonic blocking settings Name Description Range Step Default Inrush Harmonic Blocking (Internal 0;No harmonic blocking Only Trip) 1;Yes enable/disable 0.10… 0.01*%Ifund 0.01*%Ifund Harmonic Block Limit (Iharm/Ifund) harmonic blocking limit. 50.00*%Ifund © Arcteq Relays Ltd...
  • Page 46 1292 NOC1 Phase A Trip On 1293 NOC1 Phase A Trip Off 1294 NOC1 Phase B Trip On 1295 NOC1 Phase B Trip Off 1296 NOC1 Phase C Trip On 1297 NOC1 Phase C Trip Off © Arcteq Relays Ltd...
  • Page 47 Phase B Trip Off 1424 NOC3 Phase C Trip On 1425 NOC3 Phase C Trip Off 1472 NOC4 Start ON 1473 NOC4 Start OFF 1474 NOC4 Trip ON 1475 NOC4 Trip OFF 1476 NOC4 Block ON © Arcteq Relays Ltd...

  • Page 48: Non-Directional Earth Fault I0> (50N/51N)

    CT saturation condition. The operational logic consists of input magnitude processing, input magnitude selection, saturation check, threshold comparator, block signal check, time delay characteristics and output processing. © Arcteq Relays Ltd...
  • Page 49 20 ms averaged history value from -20 ms of Start or Trip event. General settings The following general settings de ne the general behavior of the function. These settings are static i.e. it is not possible change them with setting group switching. © Arcteq Relays Ltd...
  • Page 50 From blocking of the function a HMI display event as well as time stamped blocking event with information of the startup current values and fault type is issued. © Arcteq Relays Ltd...
  • Page 51 1794 NEF3 Trip ON 1795 NEF3 Trip OFF 1796 NEF3 Block ON 1797 NEF3 Block OFF 1856 NEF4 Start ON 1857 NEF4 Start OFF 1858 NEF4 Trip ON 1859 NEF4 Trip OFF 1860 NEF4 Block ON © Arcteq Relays Ltd...

  • Page 52: Directional Overcurrent Idir> (67)

    START and TRIP events simultaneously with equivalent time stamp. Time stamp resolution is 1ms. Function provides also cumulative counters for START, TRIP and BLOCKED events. Simpli ed function block diagram of DOC function is presented in the gure below. © Arcteq Relays Ltd...
  • Page 53 TRMS measurement of phase L3/C current 5 ms Fundamental RMS measurement of voltage U 5 ms Fundamental RMS measurement of voltage U 5 ms Fundamental RMS measurement of voltage U 5 ms Fundamental RMS measurement of voltage U 5 ms © Arcteq Relays Ltd...
  • Page 54 Angle memory captures the measured voltage angle 100 ms before the fault starts. After 0.5 seconds the angle memory is not used anymore, and reference voltage is forced to 0°. Inbuilt reset ratio for the trip area angle is 2°. © Arcteq Relays Ltd...
  • Page 55 Table. 5.4.3. - 65. Internal inrush harmonic blocking settings Name Description Range Step Default Inrush Harmonic Blocking (Internal 0:No harmonic blocking Only Trip) 1:Yes enable/disable 0.10… 0.01*%Ifund 0.01*%Ifund Harmonic Block Limit (Iharm/Ifund) harmonic blocking limit. 50.00*%Ifund © Arcteq Relays Ltd...
  • Page 56 Measuring live angle Off 4810 DOC1 Using voltmem On 4811 DOC1 Using voltmem Off 4864 DOC2 Start ON 4865 DOC2 Start OFF 4866 DOC2 Trip ON 4867 DOC2 Trip OFF 4868 DOC2 Block ON 4869 DOC2 Block OFF © Arcteq Relays Ltd...
  • Page 57 Table. 5.4.3. - 67. Register content Column name Content description Date & Time dd.mm.yyyy hh:mm:ss.mss Event code 4800-4997 Descr. Fault type L1-G...L1-L2-L3 Trigger current Start average current Fault current Trip -20ms averages © Arcteq Relays Ltd...

  • Page 58: Directional Earth Fault I0Dir> (67N)

    START and TRIP events simultaneously with equivalent time stamp. Time stamp resolution is 1ms. Function provides also cumulative counters for START, TRIP and BLOCKED events. Simpli ed function block diagram of the DEF function is presented in the gure below. © Arcteq Relays Ltd...
  • Page 59 Selection of the used AI channel is made with a setting parameter. In all possible input channel variations pre-fault condition is presented with 20 ms averaged history value from -20 ms of Start or Trip event. © Arcteq Relays Ltd...
  • Page 60 Visible when grounding type is -45.0…90deg 0.1deg 45deg border angle set to I0Cos&I0Sin Broadrange mode ±45.0… Angle Trip area size (Grounded network) 0.1° ±88° 135.0° Angle offset Protection area direction (Grounded network) 0.0…360.0° 0.1° 0.0° © Arcteq Relays Ltd...
  • Page 61 There are many bene ts with Petersen coil grounded network. Amount of automatic reclosing is highly decreased and therefore maintenance of breakers is diminished. Arc faults die on their own and cables and equipment suffer less damage. In emergency situations line with earth fault can be used for certain time. © Arcteq Relays Ltd...
  • Page 62 –or over compensated. Directly or small impedance grounded network Figure. 5.4.4. - 23. Angle tracking of DEF function in grounded network model. © Arcteq Relays Ltd...
  • Page 63 Lastly, in a compensated network protection, the relay with traditional algorithms may sporadically detect an earth-fault in a long healthy feeder due to CT errors. For all these reasons, Arcteq has developed an improved alternative to these traditional directional earth fault protections.
  • Page 64 The measured voltage in the chosen voltage channel. Expected operating time Displays the expected operating time in case a fault occurs Time remaining to trip When the relay has picked up and is counting time towards pick-up © Arcteq Relays Ltd...
  • Page 65 Table. 5.4.4. - 73. Event codes of the DEF-function instances. Event Number Event channel Event block name Event Code Description 5184 DEF1 Start ON 5185 DEF1 Start OFF 5186 DEF1 Trip ON 5187 DEF1 Trip OFF 5188 DEF1 Block ON 5189 DEF1 Block OFF © Arcteq Relays Ltd...
  • Page 66 DEF function register content. This information is available in 12 last recorded events for all provided instances separately. Table. 5.4.4. - 74. Register content Column name Content description Event Code dd.mm.yyyy hh:mm:ss.mss © Arcteq Relays Ltd...

  • Page 67: Current Unbalance I2

    START and TRIP events simultaneously with equivalent time stamp. Time stamp resolution is 1ms. Function provides also cumulative counters for START, TRIP and BLOCKED events. In the following gure is presented the simpli ed function block diagram of the CUB function. © Arcteq Relays Ltd...
  • Page 68 2:Side2 Measured De nes if the ratio between positive and negative sequence currents are 1:I2pu 1:I2pu magnitude supervised or if only negative sequence is used in unbalance detection. 2:I2/I1 © Arcteq Relays Ltd...
  • Page 69 Im (dependent time characteristics). For the IDMT operation is available IEC and IEEE/ANSI standard characteristics as well as user settable parameters. Uniquely to current unbalance protection there is also “Curve2” delay available which follows the formula below: © Arcteq Relays Ltd...
  • Page 70 Very Inverse, Extremely Inverse, Short Time Inverse, Short Time characteristics Extremely Inverse characteristics. Param selection allows the IEEE tuning of the constants A, B and C which allows setting of characteristics following the same formula as the IEEE curves STEI mentioned here. Param © Arcteq Relays Ltd...
  • Page 71 Table. 5.4.5. - 79. Event codes of the CUB-function instances. Event Number Event channel Event block name Event Code Description 2048 CUB1 Start ON 2049 CUB1 Start OFF 2050 CUB1 Trip ON 2051 CUB1 Trip OFF © Arcteq Relays Ltd...

  • Page 72: Harmonic Overcurrent Ih> (50H/51H/68H)

    Outputs of the function are Start Trip and Blocked signals. Setting parameters are static inputs for the function which are changed only by user input in the setup phase of the function. Non directional overcurrent function utilizes total of eight separate setting groups which can be selected from one common source. © Arcteq Relays Ltd...
  • Page 73 RMS values of the harmonic component or harmonic component percentage content compared to fundamental frequency RMS. -20ms averaged value of the selected magnitude is used for pre-fault data registering. Table. 5.4.6. - 81. Analogic magnitudes used by the HOC function. Time Signal Description base © Arcteq Relays Ltd...
  • Page 74 Selection of the measurement input Measurement IL1/IL2/IL3 either phase currents or residual input currents inputs. Each HOC function instance provides these same settings. Multiple instances of HOC can be set to operate independently of each other. © Arcteq Relays Ltd...
  • Page 75 In the function is available 12 last registers where the triggering event of the function (start, trip or blocked) is recorded with time stamp and process data values. © Arcteq Relays Ltd...

  • Page 76: Circuit Breaker Failure Protection Cbfp (50Bf)

    CBFP function can be used for Retrip to the failing breaker and if the Retrip fails the upstream breaker can be tripped by using CBFP output. Retrip functionality can be disabled if the breaker does not have two open coils. © Arcteq Relays Ltd...
  • Page 77 Table. 5.4.7. - 86. Analogic magnitudes used by the CBFP function. Signal Description Time base IL1RMS Fundamental RMS measurement of phase L1/A current 5 ms IL2RMS Fundamental RMS measurement of phase L2/B current 5 ms © Arcteq Relays Ltd...
  • Page 78 Operating mode selection. Mode can be dependent of current Actmode 6:Current or only measurement, digital channel status or combination of these. signals 7:Signals and 8:Signals or DO 9:Current or DO or signals 10:Current and DO and Signals © Arcteq Relays Ltd...
  • Page 79 CBFP start timer, this setting de nes how long the starting condition has to last CBFP 0.005s 0.200s 1800.000s before CBFP signal is activated. A few typical cased of CBFP are presented in the following gures. © Arcteq Relays Ltd...
  • Page 80 Retrip is wired in parallel from its own output contact in the IED to the second tripping coil of the circuit breaker. CBFP signal to upstream is wired normally from its output contact in the IED to the upstream / incomer breaker. In following are few operational cases presented regarding to the different applications. © Arcteq Relays Ltd...
  • Page 81 CBFP will be issued to upstream breaker. If the primary protection function clears the fault e.g. the circuit breaker operates normally the counters for retrip and CBFP are reset immediately the current is measured below the threshold settings. © Arcteq Relays Ltd...
  • Page 82 This con guration allows the CBFP to be controlled on current based functions only and other function trips can be excluded from the CBFP functionality. © Arcteq Relays Ltd...
  • Page 83 This con guration allows the CBFP to be controlled on current based functions with added security from the current monitoring of the CBFP function and other function trips can be also included to the CBFP functionality. © Arcteq Relays Ltd...
  • Page 84 Probably the most common application is the case where the circuit breaker trip coil is controlled with the IED trip output and CBFP is controlled with one dedicated CBFP contact. In following are few operational cases presented regarding to the different applications and settings of the CBFP function. © Arcteq Relays Ltd...
  • Page 85 CBFP will be issued to upstream breaker. If the primary protection function clears the fault e.g. the circuit breaker operates normally the counter for CBFP are reset immediately the current is measured below the threshold settings. © Arcteq Relays Ltd...
  • Page 86 This con guration allows the CBFP to be controlled on current based functions only and other function trips can be excluded from the CBFP functionality. © Arcteq Relays Ltd...
  • Page 87 This con guration allows the CBFP to be controlled on current based functions with added security from the current monitoring of the CBFP function and other function trips can be also included to the CBFP functionality. © Arcteq Relays Ltd...
  • Page 88 CBFP for the upstream breaker tripping. In this example no retripping is utilized and CBFP signal is used for the incomer trip from the outgoing breaker trip signal. The trip signal can be transported in between of the IED:s also by using GOOSE messages if so wanted. © Arcteq Relays Ltd...
  • Page 89 Table. 5.4.7. - 91. Event codes of the CBFP function instance Event Number Event channel Event block name Event Code Description 2816 CBF1 Start ON 2817 CBF1 Start OFF 2818 CBF1 Retrip ON 2819 CBF1 Retrip OFF 2820 CBF1 CBFP ON © Arcteq Relays Ltd...

  • Page 90: Restricted Earth Fault / Cable End Differential (Ref) I0D> (87N)

    ON/OFF events to the common event buffer from each of the two output signals. Time stamp resolution is 1ms. Function provides cumulative counters for REF Trip and BLOCKED events. In the following gure is presented the simpli ed function block diagram of the REF function. © Arcteq Relays Ltd...
  • Page 91 The following general settings de ne the general behavior of the function. These settings are static i.e. it is not possible change them with setting group switching. Table. 5.4.8. - 94. General settings of the REF stage (not SG selectable) Name Range Step Default Description © Arcteq Relays Ltd...
  • Page 92 The pick-up activation of the function is not directly equal to trip-signal generation of the function. Trip signal is allowed if blocking condition is not active. In the following gure is presented the differential characteristics with default settings. © Arcteq Relays Ltd...
  • Page 93 Blocking signal is received from the blocking matrix for the function dedicated input. If the blocking signal is not activated when the pick-up element activates, a Trip signal is generated and the function proceeds to the time characteristics calculation. © Arcteq Relays Ltd...
  • Page 94 When the current natural unbalance is compensated in this same situation the differential settings may be set more sensitive and the natural unbalance does not affect into the calculation. Figure. 5.4.8. - 43. Cable end differential when fault happens. © Arcteq Relays Ltd...
  • Page 95 If the fault is located inside of the transformer and thus inside of the protection area the REF function catches the fault with high sensitivity since the measured residual current directions are now opposite for the outside fault situation the measured differential current is high. © Arcteq Relays Ltd...
  • Page 96 Table. 5.4.8. - 97. Register content Residual Used Date & Time Event code Trigger currents Trigger currents currents Biascurrent trig Biascurrent max dd.mm.yyyy 4224-4227 Diffcurrent trig Diffcurrent max I0Calc 1 - 8 hh:mm:ss.mss Descr. Characteristics diff Characteristics diff I0 meas trig © Arcteq Relays Ltd...

  • Page 97: Overvoltage U

    Analog voltage measurement values are used by the function. Function block always utilizes peak-to- peak measurement from samples and the monitored magnitudes are fundamental frequency RMS values. -20 ms averaged value is used for the pre-fault data. © Arcteq Relays Ltd...
  • Page 98 Selection of the used AI channel is made with a setting parameter. In all possible input channel variations pre-fault condition is presented with 20 ms averaged history value from -20 ms of Start or Trip event. Figure. 5.4.9. - 47. Selectable measurement magnitudes with 3LN+U4 VT connection. © Arcteq Relays Ltd...
  • Page 99 Uset value.  The setting value is common for all measured amplitudes and single-, dual- or each voltages Um exceed above the Uset value will cause pick-up operation of the function. Table. 5.4.9. - 100. Pick-up characteristics setting Name Description Range Step Default © Arcteq Relays Ltd...
  • Page 100 (independent time characteristics). Inverse de nite minimum time (IDMT) will give the trip signal in time which is in relation of the set pick-up voltage Uset and measured voltage Um (dependent time characteristics). The IDMT function follows this formula: © Arcteq Relays Ltd...
  • Page 101 When using the release delay option where the operating time counter is calculating the operating time during the release time, function will not trip if the input signal is not activated again during the release time counting. © Arcteq Relays Ltd...
  • Page 102 Fault Prefault Trip time Used Date & Time code type voltage voltage voltage remaining dd.mm.yyyy 5440-5637 L1-… L1- Start average Trip -20 ms Start -200ms 0s ...1800s 1 - 8 hh:mm:ss.mss Descr. L2-L3 voltage averages averages © Arcteq Relays Ltd...

  • Page 103: Undervoltage U

    Analog voltage measurement values are used by the function. Function block always utilizes peak-to- peak measurement from samples and the monitored magnitudes are fundamental frequency RMS values. -20 ms averaged value is used for the pre-fault data. © Arcteq Relays Ltd...
  • Page 104 Selection of the used AI channel is made with a setting parameter. In all possible input channel variations pre-fault condition is presented with 20 ms averaged history value from -20 ms of Start or Trip event. Figure. 5.4.10. - 51. Selectable measurement magnitudes with 3LN+U4 VT connection. © Arcteq Relays Ltd...
  • Page 105 Um decrease below the Uset value will cause pick-up operation of the function. Table. 5.4.10. - 107. Pick-up characteristics setting Name Description Range Step Default 0.00 … Uset Pick-up setting 0.01%Un 60%Un 120.00%Un © Arcteq Relays Ltd...
  • Page 106 Displays the expected operating time in case a fault occurs time Time remaining to When the relay has picked up and is counting time towards pick-up trip Umeas/Uset at the Um/Uset Ratio between measured voltage and the pick-up value. moment © Arcteq Relays Ltd...
  • Page 107 Table. 5.4.10. - 108. Operating time characteristics setting parameters. Name Range Step Default Description Selection of the delay type time counter. Selection possibilities are dependent Delay Type (IDMT, Inverse De nite Minimum Time) and independent (DT, De nite Time) IDMT characteristics. © Arcteq Relays Ltd...
  • Page 108 Table. 5.4.10. - 110. Event codes of UV function instance 1 – 4. Event Number Event channel Event block name Event Code Description 5696 Start ON 5697 Start OFF 5698 Trip ON 5699 Trip OFF 5700 Block ON 5701 Block OFF 5702 Undervoltage Block On © Arcteq Relays Ltd...

  • Page 109: Neutral Voltage U0> (59N)

    Neutral overvoltage protection is scaled to line- to line fundamental frequency component level. In case line to line voltage of system is 100 V secondary the earth fault is 100% of Un when calculated zero sequence voltage reaches  100/√3 V = 57.74 V. © Arcteq Relays Ltd...
  • Page 110 The function can be operating on instant or time delayed mode. In time delayed mode the operation can be selected for de nite time or IDMT. For IDMT operation IEC and ANSI standard time delays are supported as well as custom parameters. © Arcteq Relays Ltd...
  • Page 111 Primary voltage required for tripping. The displayed pick-up voltage level depends on the chosen setting U0 measurement input selection, pick-up setting and the voltage transformer settings. Expected Displays the expected operating time in case a fault occurs operating time © Arcteq Relays Ltd...
  • Page 112 User settable variables are binary signals from the system. Blocking signal needs to reach the IED minimum of 5 ms before the set operating delay has passedfor blocking to be active in time. © Arcteq Relays Ltd...
  • Page 113 Continue time calculation Time calculation characteristics selection. If activated the operating time during release counter is continuing until set release time even the pick-up element is reset. time © Arcteq Relays Ltd...
  • Page 114 In the register of the NOV function is recorded start, trip or blocked “On” event process data. In the table below is presented the structure of NOV function register content. This information is available in 12 last recorded events for all provided instances separately. © Arcteq Relays Ltd...

  • Page 115: Sequence Voltage U1/U2>/<(59P/27P/47)

    Below is presented the formula for symmetric component calculation and therefore to VUB positive sequence calculation.  See positive sequence calculation examples below. Figure. 5.4.12. - 59. Positive sequence component vector examples. Earth fault in isolated network. © Arcteq Relays Ltd...
  • Page 116 Close distance short circuit between phases 1 and 3. Negative sequence calculation Below is presented the formula for symmetric component calculation and therefore to NSV calculation. See negative sequence calculation examples below. Figure. 5.4.12. - 60. Negative sequence component vector examples. © Arcteq Relays Ltd...
  • Page 117 Figure. 5.4.12. - 61. Simpli ed function block diagram of the sequence voltage function. Measured input values The function block uses analog voltage measurement values. Function block always utilizes fundamental frequency RMS values. -20 ms averaged value of the selected magnitude is used for the pre-fault data registering. © Arcteq Relays Ltd...
  • Page 118 Under block setting Ublk the blocking will persist until all of the line voltages have risen over the U< pick-up setting. Please see the image for a visualization of this function. If block level is set to zero, blocking is not in use. © Arcteq Relays Ltd...
  • Page 119 From blocking of the function a HMI display event as well as time stamped blocking event with information of the startup voltage values and fault type is issued. © Arcteq Relays Ltd...
  • Page 120 8450 VUB3 Trip ON 8451 VUB3 Trip OFF 8452 VUB3 Block ON 8453 VUB3 Block OFF 8512 VUB4 Start ON 8513 VUB4 Start OFF 8514 VUB4 Trip ON 8515 VUB4 Trip OFF 8516 VUB4 Block ON © Arcteq Relays Ltd...

  • Page 121: Over- And Underfrequency F>/< (81O/81U)

    START and TRIP events simultaneously with equivalent time stamp. Time stamp resolution is 1ms. Function provides also cumulative counters for START, TRIP and BLOCKED events. In the following gure is presented the simpli ed function block diagram of the FRQV function. © Arcteq Relays Ltd...
  • Page 122  Reset ratio of 97 % is inbuilt in the function and is always related to the pick-up value. Table. 5.4.13. - 126. Pick-up characteristics setting Name Description Range Step Default fset> fset>> Pick-up setting 10.00…80.00Hz 0.01Hz 51Hz fset>>> fset>>>> © Arcteq Relays Ltd...
  • Page 123 Trip ON 6339 FRQV1 f>  Trip OFF 6340 FRQV1 f>>  Start ON 6341 FRQV1 f>>  Start OFF 6342 FRQV1 f>>  Trip ON 6343 FRQV1 f>>  Trip OFF 6344 FRQV1 f>>>  Start ON 6345 FRQV1 f>>>  Start OFF © Arcteq Relays Ltd...
  • Page 124 FRQV1 f<<<  Block OFF 6382 FRQV1 f<<<<  Block ON 6383 FRQV1 f<<<<  Block OFF  In the table below is presented the structure of FSP function register content. This information is available in 12 last recorded events. © Arcteq Relays Ltd...

  • Page 125: Rate-Of-Change Of Frequency Protection Df/Dt (81R)

    Frequency protection utilizes total of eight separate setting groups which can be selected from one common source. The function can operate on instant or time delayed mode. © Arcteq Relays Ltd...
  • Page 126 The f>/< limit value is used to block the operation of the function near the nominal frequency. Table. 5.4.14. - 130. Pick-up characteristics setting Name Description Range Step Default df/dt>/<(1…8)pick-up Pick-up setting 0.01…10.00Hz/s 0.01Hz/s 0.2 Hz/s © Arcteq Relays Ltd...
  • Page 127 </> (2)  Start ON 6597 DFT1 df/dt </> (2)  Start OFF 6598 DFT1 df/dt </> (2)  Trip ON 6599 DFT1 df/dt </> (2)  Trip OFF 6600 DFT1 df/dt </> (3)  Start ON 6601 DFT1 df/dt </> (3)  Start OFF © Arcteq Relays Ltd...
  • Page 128 6638 DFT1 df/dt </> (8)  Block ON 6639 DFT1 df/dt </> (8)  Block OFF In the table below is presented the structure of FSP function register content. This information is available in 12 last recorded events. © Arcteq Relays Ltd...

  • Page 129: Power Protection (32)

    ON/OFF events to the common event buffer from each of the three output signal. In instant operating mode the function outputs START and TRIP events simultaneously with equivalent time stamp. Time stamp resolution is 1ms. Function provides also cumulative counters for START, TRIP and BLOCKED events. © Arcteq Relays Ltd...
  • Page 130 User settable variables are binary signals from the system. Blocking signal needs to reach the IED minimum of 5 ms before the set operating delay has passedfor blocking to be active in time. © Arcteq Relays Ltd...

  • Page 131: Transformer Status Monitoring (Trf)

    TRF function can output light/no load, HV side inrush, LV side inrush, normal load, overloading and heavy overloading signals to be used in indication or in logic programming. From these signals TRF also generates events if so wanted. © Arcteq Relays Ltd...
  • Page 132 “HV/LV inrush detection” signals are activated. If measured current is in between of low detection and nominal current the “Load normal” signal is activated. If measured current is in between of nominal and heavy overloading current “Overloading” signal is activated. © Arcteq Relays Ltd...
  • Page 133 Selection is visible only if vector group is set to “0:Manual set” HV side lead 0:Lead TRF, Selection for HV side leads or lags LV side. Selection is 0:Lead or lag LV 1:Lag DIFF visible only if vector group is set to “0:Manual set” © Arcteq Relays Ltd...
  • Page 134 LV side 2ph SC to HV Calculated max two phase short circuit 0.001...500.000kA 0.001kA 0.000kA Info side current in LV side shows to HV side. Table. 5.4.16. - 139. Output signals of the TRF function Name Range Step Default Description © Arcteq Relays Ltd...
  • Page 135 LV side LV side LV side 4608- dd.mm.yyyy HV side Phase L1 4621 Phase L2 Phase L3 Phase L1 Phase L2 Phase L3 hh:mm:ss.mss current xIn Descr. current xIn current xIn current xIn current xIn current xIn © Arcteq Relays Ltd...

  • Page 136: Transformer Thermal Overload Protection Tt> (49Tr)

    100% but never exceeds it. With a single time constant model cooling of the object follows this same behavior reversible to the heating when the current feeding is completely zero. © Arcteq Relays Ltd...
  • Page 137 Ambient temperature compensation takes into account the set minimum and maximum temperature and load capacity of the protected object and measured or set ambient temperature. The calculated coef cient is linear correction factor which is presented with following formulas: © Arcteq Relays Ltd...
  • Page 138 = Ambient temperature reference (can be set in  ̊ C or  ̊ F , the temperature in which the given manufacturer presumptions apply and the temperature correction factor is 1.0) Figure. 5.4.17. - 70. Ambient temperature coef cient calculation examples when reference temperature is +15 C with 3 point linear approximation and settable correction curve. © Arcteq Relays Ltd...
  • Page 139 IL3RMS Fundamental TRMS measurement of phase L3/C current 5 ms Temperature measurement for the ambient correction 5 ms Table. 5.4.17. - 143. General settings of the TOLT stage (not SG selectable) Name Range Step Default Description © Arcteq Relays Ltd...
  • Page 140 Minimum ambient temperature setting. If measured temperature is -60… less than minimum set temperature the set correction factor for Min ambient temp 1deg 0deg 500deg minimum temperature shall be used. Setting is visible if  Ambient lin. or curve is set to “Linear est.” © Arcteq Relays Ltd...
  • Page 141 If blocking signal is active when pick-up element activates a BLOCKED signal will be generated and the function shall not process the situation further. If Trip function has been activated before blocking signal it will reset and the release time characteristics are processed as in case of when pick-up signal is reset. © Arcteq Relays Ltd...
  • Page 142 Alarm1 inits Times the TOLT function has activated the Alarm 1 output Alarm2 inits Times the TOLT function has activated the Alarm 2 output Restart inhibits Times the TOLT function has activated the Restart inhibit output © Arcteq Relays Ltd...

  • Page 143: Transformer Differential Idb> Idi> I0Dhv> I0Dlv> (87T,87N)

    While transformers do not have many moving parts (except tap changers), their electric and mechanical properties are far from being simple. © Arcteq Relays Ltd...
  • Page 144  Transformer faults are many, to mention few most likely causes to faults are dirty, watered or old transformer oil, oil leaking from the tank, prolonged and multiple heavy overloading and faults in cooling systems. These reasons can cause transformer windings earth faults, interturn faults or even phase to phase faults. © Arcteq Relays Ltd...
  • Page 145 Transformer special properties like tap changer and auxiliary windings Transformer vector group (for matching the transformer per unitized vectors) HV and LV side current transformer ratios and properties. In this chapter the setting and principle of transformer differential protection are shown step by step. © Arcteq Relays Ltd...
  • Page 146 However below are the formulas to calculate the amplitude matching coef cients. Let’s say that in this example HV side CTs are 150/5A and LV side CTs are 1200/5A Primary side per unit factor and current calculation © Arcteq Relays Ltd...
  • Page 147 “1”. Equally “11” means that the LV side is leading 30 degrees, “5” and “7” are just the other ends of the windings thus causing 180 degree difference into these “1” and “11” clock numbers. © Arcteq Relays Ltd...
  • Page 148 In this case in differential relay the differential function applies following translation to delta side currents (note that the correction is not only to the angles but also to the amplitudes since the per unitized delta side has  relation amplitude difference to star connected side) © Arcteq Relays Ltd...
  • Page 149 CTs currents when the “subtract” mode can be used for differential calculation and the both sides measurements could be shown as one star connected vector diagram. As mentioned now the differential algorithm itself, it has calculating formula per each phase difference: Subtracting formula: Or Additive formula: © Arcteq Relays Ltd...
  • Page 150 Instruction manual Version: 2.00 Can be selected based into the CTs connections. Figure. 5.4.18. - 77. If current transformer starpoints are pointing towards each other or away from each other, “Add” differential calculation mode is used. © Arcteq Relays Ltd...
  • Page 151 Average mode (sensitive biasing): Max mode (coarse biasing): Now these two mentioned formulas are combined in a way so that the y axle presents the differential current measured and the x axle present the bias current calculated. © Arcteq Relays Ltd...
  • Page 152  must be higher than all these differential d>pick-up  current causing normal operation factors combined. When calculating the basic normal situation differential current, following image illustrated parts should be considered. These transformer components errors need to be taken into account. © Arcteq Relays Ltd...
  • Page 153 5 x 2.5% from the nominal conditions. So therefore TCE is in this case 12.5%. (Note that the tap position is not always necessarily nominal in center position, check from your application and calculate the maximum effect to worst side border). © Arcteq Relays Ltd...
  • Page 154 To calculate auxiliary power output effect, calculate the percentage of auxiliary transformer/winding VA to transformer nominal VA. This represents the case when the auxiliary load is in nominal. © Arcteq Relays Ltd...
  • Page 155 With these values following base sensitivity (e.g. the minimum setting for the differential current required to operate the relay), is given for the differential protection characteristics: © Arcteq Relays Ltd...
  • Page 156 Now the calculation of the maximum differential current in the Turnpoint 2 includes before calculated correction factors for HV and LV side CTs. Also is needed the corrected transformation ratio effect due to the tap changer position on maximum voltage position (usually this generates the highest differential current). © Arcteq Relays Ltd...
  • Page 157 CTs when the starpoint is either towards to transformer or away from it) When more sensitive settings are wanted “Average” mode is selected If more stabile settings are wanted “Maximum” mode is selected: With “Average” mode selected the slope is calculated as follows: © Arcteq Relays Ltd...
  • Page 158 Setting of the stage should be based into the weakest CT full saturation under worst case through fault condition (since this causes that only the other side current is measured then and that causes all seen current to be differential current). © Arcteq Relays Ltd...
  • Page 159 Important initial data for this check is the VA of the CTs on both sides, how long wiring to relay from the CTs, what is the cross-section and material of the wires and how the CTs are connected. Let’s start from the wiring caused burden for the relay. Resistance in a conductor is calculated in following way: © Arcteq Relays Ltd...
  • Page 160 Suggestion is that for calculating the CT burden the worst case scenario is used. For most cases these 75ºC values can be used. If in your application ambient temperature is higher than 75ºC , then the resistance should be calculated for that temperature. © Arcteq Relays Ltd...
  • Page 161 LV side 5m, both sides have 30% of wiring made with 6-wire connection and 70% of wiring with 4-wire connection. Wirings of HV and LV sides are made with 4 mm wires. HV side: 150/5A 10P10 5VA LV side: 1200/5A 5P10 5VA © Arcteq Relays Ltd...
  • Page 162 In this example the transformer used is very small, however the formulas presented in this manual can be applied to any size power transformers. In the TRF module, relay calculates these settings automatically if so wanted. Relay uses exactly these same formulas for the setting calculations. © Arcteq Relays Ltd...
  • Page 163 Basically in between these presented restraint calculation modes the characteristics are now set to equally sensitive. Also the variations of Turnpoint1 setting either to 0.01xIn or 1.0xIn are presented (Figures A, C with Turnpoint 1 set to 1.00 xIn and B, D with Turnpoint 1 set to 0.01 xIn). © Arcteq Relays Ltd...
  • Page 164 “N” or “n” representing either HV side or LV side grounding. What this selection actually does is that it deducts the calculated zero sequence current from the per- unitized currents before differential calculation thus negating the outside earth fault effect. © Arcteq Relays Ltd...
  • Page 165 Restricted earth fault enabling requires that in addition to phase currents measurement also the starpoint current is available and can be connected to the residual current channel of the relay on corresponding (HV/LV) side measurement. © Arcteq Relays Ltd...
  • Page 166 CT ratings). The tripping characteristics may be set differently in case if the network is directly grounded or through impedance and the fault current may be expected to saturate CTs in the external fault also. © Arcteq Relays Ltd...
  • Page 167 (depending of the transformer properties) the flux shall be 90 degrees behind the winding voltage and the system is in steady state. © Arcteq Relays Ltd...
  • Page 168 Basically this energization current shall be seen in the differential relay as a differential current since it will flow through the primary side winding only. For this purpose the 2 harmonic component generated by the saturation of the transformer core can be used to block the biased sensitive differential stage during energization. © Arcteq Relays Ltd...
  • Page 169 (50 Hz) FFT calculated currents in amperes, and fth graph presents the relative 2 harmonic components to corresponding fundamental component currents with the 15% setting limit for display what the setting presents in this concept. © Arcteq Relays Ltd...
  • Page 170 Now this result is still very low considering of the magnetizing inrush current magnitudes but still the differential relay would de nitely trip in this case if it would not be prevent from operating by 2 harmonic blocking. Situation is the same with all of the setting variations calculated. © Arcteq Relays Ltd...
  • Page 171 15-20% harmonic content compared to fundamental frequency. Final tuning for the transformer settings can be made in commissioning if there should be any issues on problematic transformer energisation. © Arcteq Relays Ltd...
  • Page 172 (which is used in the blocking). Also into the graph are plotted possible suggested setting limits for the harmonic detection (30%, 35% and 40%). In the second graph are plotted primary and secondary currents in function of the voltage and in the last graph the differential characteristics and differential/bias currents. © Arcteq Relays Ltd...
  • Page 173 Based into the ratio check this however is not very failsafe way in order that to set it correctly and so that it could be more of use the magnetizing properties and hysteresis of the transformer should be completely known. © Arcteq Relays Ltd...
  • Page 174 30-40% with disturbance recorder enabled. If there should happen anything related to tripping due to over excitation, settings may be adjusted based into the data captured by disturbance recorder. © Arcteq Relays Ltd...
  • Page 175 Transformer short circuit impedance in %. Used for 0.01…25.00% 0.01% 3.00% Info calculation of the short circuit currents Transformer Transformer nominal frequency. Used for calculation of 10…75Hz 50Hz Info nom. freq transformer nominal short circuit inductance. © Arcteq Relays Ltd...
  • Page 176 Selection is visible only if vector group is set to “0:Manual set” Enable I0d> 0:Disabled HV side restricted earth fault stage enable/disable (REF) HV 0: Disabled TRF,DIFF 1:Enabled selection. side © Arcteq Relays Ltd...
  • Page 177 “Enable Idi>” stage is set to 1. Pickup Base sensitivity for the HV side restricted earthfault differential HV I0d> 0.01… 0.01% 10.00% characteristics Setting is visible only if “Enable I0d> (REF) HV side” is set to Pickup 100.00% “1: Enabled” © Arcteq Relays Ltd...
  • Page 178 Trip output signal from the non-biased/non-blocked differential stage Idb> Bias Blocked Blocked output from the biased differential stage (external blocking) Idi> Bias Blocked Blocked output from the non-biased/non-blocked differential stage (external blocking) Idb> 2 harm block on Output of 2 harmonic activation signal © Arcteq Relays Ltd...
  • Page 179 4567 DIF1 L3 5.th harm Off 4568 DIF1 HV I0d> Block On 4569 DIF1 HV I0d> Block Off 4570 DIF1 HV I0d> Trip On 4571 DIF1 HV I0d> Trip Off 4572 DIF1 LV I0d> Block On © Arcteq Relays Ltd...

  • Page 180: Voltage Memory Function

    Activation of voltage memory depends of following criteria’s: 1. All used line-to-line or line-to-neutral voltages need to be below set “VMEM activation voltage”. 2. Least one phase current must be higher than set “Measured current condition 3I>”. This setting limit is optional. © Arcteq Relays Ltd...
  • Page 181 In this mode voltage memory is based on line-to-line voltages U12 and U23. In case 2LL+U0 mode is used, voltage memory is based on calculated phase-to-neutral voltages. Pick-up characteristics VMEM activation voltage and measured current condition 3I> © Arcteq Relays Ltd...
  • Page 182 In case “Forced CT f tracking” is on, while voltages are gone, the frequency from selected current based reference channel 3 (current from IL3) is used for current sampling. This eliminates possible measurement error in xed frequency mode. © Arcteq Relays Ltd...

  • Page 183: Resistance Temperature Detectors (Modbus Io) (Rtd) (49T)

    ModbusIO protocol. These are set at Communication → Connections . After the communication is set the wanted channels are selected from the ModbusIO tab under Communication → Protocols . There are three separate modules available for selection. © Arcteq Relays Ltd...
  • Page 184 Table. 5.4.20. - 162. Settings of the RTD function for channel x/12. Name Range Step Default Description 0:No Sx enable 0:No Enable / Disable selection of the sensor measurements and alarms 1:Yes 0:ModuleA Sx module 1:ModuleB 0:ModuleA Selection of the measurement module 2:ModuleC © Arcteq Relays Ltd...
  • Page 185 S1 Alarm1 On 4417 RTD1 S1 Alarm1 Off 4418 RTD1 S1 Alarm2 On 4419 RTD1 S1 Alarm2 Off 4420 RTD1 S2 Alarm1 On 4421 RTD1 S2 Alarm1 Off 4422 RTD1 S2 Alarm2 On 4423 RTD1 S2 Alarm2 Off © Arcteq Relays Ltd...
  • Page 186 S11 Alarm1 Off 4458 RTD1 S11 Alarm2 On 4459 RTD1 S11 Alarm2 Off 4460 RTD1 S12 Alarm1 On 4461 RTD1 S12 Alarm1 Off 4462 RTD1 S12 Alarm2 On 4463 RTD1 S12 Alarm2 Off 4464 RTD1 S13 Alarm1 On © Arcteq Relays Ltd...
  • Page 187 S10 Meas Ok 4499 RTD2 S10 Meas Invalid 4500 RTD2 S11 Meas Ok 4501 RTD2 S11 Meas Invalid 4502 RTD2 S12 Meas Ok 4503 RTD2 S12 Meas Invalid 4504 RTD2 S13 Meas Ok 4505 RTD2 S13 Meas Invalid © Arcteq Relays Ltd...

  • Page 188: Arc Fault Protection Iarc>/I0Arc>(50Arc/50Narc)

    Arc protection card has four sensor channels. Up to three arc point sensors may be connected to each channel. Sensor channels support Arcteq AQ-01 (light sensing) and AQ-02 (pressure and light sensing) units. Optionally protection function can be applied with phase or residual current condition.
  • Page 189 Example scheme setting The following examples enables better understanding of setting up the arc protection function. In the following cases AQ-101 models are used to extend the protection of Zone2 and to protect each outgoing feeder (Zone3). © Arcteq Relays Ltd...
  • Page 190 AQ-100 series units to AQ-200 series arc protection card to prevent the pulses from activating ArcB1. Next example is the same as in the rst one but this time each outgoing feeder has AQ-2xx protection relay instead of AQ-101 arc protection relay. © Arcteq Relays Ltd...
  • Page 191 Arc protection uses sample based current measurement. If required number of samples is found over the setting limit current condition activates. It is possible to use either phase currents or residual current in the tripping decision. © Arcteq Relays Ltd...
  • Page 192 5 ms before the set operating delay has passedfor blocking to be active in time. Events & registers The ARC function generates events and registers from the status changes of start, trip and blocked. To main event buffer it’s possible to select status “On” or “Off” messages. © Arcteq Relays Ltd...
  • Page 193 4766 ARC1 Channel 2 Pressure On 4767 ARC1 Channel 2 Pressure Off 4768 ARC1 Channel 3 Light On 4769 ARC1 Channel 3 Light Off 4770 ARC1 Channel 3 Pressure On 4771 ARC1 Channel 3 Pressure Off © Arcteq Relays Ltd...

  • Page 194: Programmable Stage

    “Activated”, the amount of programmable stages can be set anywhere between 1 to 10 depending on the need of the application. In the example below the amount of programmable stages have been set to 2, which results in PS1 and PS2 appearing. The inactive stages are hidden until they are activated. © Arcteq Relays Ltd...
  • Page 195 0.00866 multiplier inverses to 100%. This way pre-processed signal is easier to set, but it is also possible to just use scaling factor of 1.0 and set the desired pick-up limit as primary voltage. In the same way any chosen measurement value can be scaled to desired form. © Arcteq Relays Ltd...
  • Page 196 Any of the signals need to ful ll the pick-up condition. Each signal has their own pick-up setting. Mag3 4:Mag1 AND Mag2 AND All of the signals need to ful ll the pick-up condition. Each signal has their own pick-up setting. Mag3 © Arcteq Relays Ltd...
  • Page 197 4:Delta Relative change over time. If the measured signal changes more than the set relative pick-up value in 20ms, set(%) +/- > the comparison condition is ful lled. The condition is dependent on direction. © Arcteq Relays Ltd...
  • Page 198 IL2 13th harmonic in per unit value IL2 15th h. IL2 15th harmonic in per unit value IL2 17th h. IL2 17th harmonic in per unit value IL2 19th h. IL2 19th harmonic in per unit value Description © Arcteq Relays Ltd...
  • Page 199 I02 17th harmonic in per unit value I02 19th h. I02 19th harmonic in per unit value TRMS Description IL1 TRMS IL1 True RMS in per unit value IL2 TRMS IL2 True RMS in per unit value © Arcteq Relays Ltd...
  • Page 200 UL2 Primary voltage V UL3Mag UL3 Primary voltage V U0Mag U0 Primary voltage V Angles Description UL12Ang UL12 angle UL23Ang UL23 angle UL31Ang UL31 angle UL1Ang UL1 angle UL2Ang UL2 angle UL3Ang UL3 angle U0Ang U0 angle Calculated Description © Arcteq Relays Ltd...
  • Page 201 XL31Pri Reactance X L31 primary ohm RL12Sec Resistance R L12 secondary ohm XL12Sec Reactance X L12 secondary ohm RL23Sec Resistance R L23 secondary ohm XL23Sec Reactance X L23 secondary ohm RL31Sec Resistance R L31 secondary ohm © Arcteq Relays Ltd...
  • Page 202 Positive Reactance X secondary ohm ZSeqPri Positive Impedance Z primary ohm ZSeqSec Positive Impedance Z secondary ohm ZSeqAngle Positive Impedance Z angle GL1Pri Conductance G L1 primary mS BL1Pri Susceptance B L1 primary mS GL2Pri Conductance G L2 primary mS © Arcteq Relays Ltd...
  • Page 203 Outputs of the function are Start Trip and Blocked signals. Setting parameters are static inputs for the function which are changed only by user input in the setup phase of the function. Programmable stage utilize total of eight separate setting groups which can be selected from one common source. © Arcteq Relays Ltd...
  • Page 204 User settable variables are binary signals from the system. Blocking signal needs to reach the IED minimum of 5 ms before the set operating delay has passedfor blocking to be active in time. © Arcteq Relays Ltd...
  • Page 205 8601 PGS1 PS5 >/< Start OFF 8602 PGS1 PS5 >/< Trip ON 8603 PGS1 PS5 >/< Trip OFF 8604 PGS1 PS5 >/< Block ON 8605 PGS1 PS5 >/< Block OFF 8606 PGS1 reserved 8607 PGS1 reserved © Arcteq Relays Ltd...
  • Page 206 12 last recorded events for all provided instances separately. Table. 5.4.22. - 170. Register content. Trip time Used Date & Time Event code >/< Mag# Mag#/Set# remaining dd.mm.yyyy 8576-8637 Magnitude # Measured magnitude/Pick-up 0ms -1800s 1 - 8 hh:mm:ss.mss Descr. value setting © Arcteq Relays Ltd...

  • Page 207: Control Functions

    General settings include the measurement reference voltage selection. In this part the measured phase to phase voltage has to be selected as well as the measurement input in case if U4 input is used for voltage measurements. © Arcteq Relays Ltd...
  • Page 208 Control settings include the operating mode selection (Auto / Manual) and the control pulse length max and minimum settings for the used output contacts. Instant operation the minimum wait time between pulses is also set here. Figure. 5.5.1. - 101. Control pulse timing settings. © Arcteq Relays Ltd...
  • Page 209 Tap maximum decrease -15.03% Tap maximum increase 15.03% Tap control band 30.06% Tap step in mA 0.889mA mA input now measured mA input value These basic settings de ne the control area where AVR must operate. © Arcteq Relays Ltd...
  • Page 210 Version: 2.00 Figure. 5.5.1. - 102. Connection of mA input to option card. Either of the channel 1 or 2 can be used. Figure. 5.5.1. - 103. Tap position indication according to the settings in the example. © Arcteq Relays Ltd...
  • Page 211 This can be corrected by scaling the tap position output value gotten from mA inputs. Below is an example where tap changer has 18 positions and the mA/position curve has been corrected at two points between the min and max positions. © Arcteq Relays Ltd...
  • Page 212 . Binary inputs are then de ned in voltage regulator menu IO → Input signal control . It is possible to set up to ve binary inputs for BCD coding. Up to 31 positions can be indicated by using BCD coding. © Arcteq Relays Ltd...
  • Page 213 Tap position measured from resistance Instead of using mA measurement RTD resistance is an applicable option. To use RTD measurement the position indication needs to be scaled in menu Measurement → AI(mA, DI volt) scaling . © Arcteq Relays Ltd...
  • Page 214 AQ-T257 Instruction manual Version: 2.00 Figure. 5.5.1. - 106. Example scaling for tap position indication with RTD measurement Figure. 5.5.1. - 107. Result of the example RTD scaling con guration © Arcteq Relays Ltd...
  • Page 215 Voltage windows as well as all other setting parameters are in relation of the set target voltage UTGT. If target voltage is changed this given window will follow new target voltage with same parameters. © Arcteq Relays Ltd...
  • Page 216 However, the voltage after tap change is very near to opposite limit. If voltage changes back to original value tap change is needed again. This may cause excessive amount of tap operations and the network voltage quality is not signi cantly improved. © Arcteq Relays Ltd...
  • Page 217 To de ne the second voltage window and settings for fast operation the setting limit should be considered so that it is not used before one tap change cannot bring the voltage inside the set rst voltage window. © Arcteq Relays Ltd...
  • Page 218 This means that if the measured voltage exceeds the threshold a lot the operating time will be faster and if the measured voltage exceeds the threshold less the operating time will be slower. AVR inverse operating time follows equation: © Arcteq Relays Ltd...
  • Page 219 Figure. 5.5.1. - 112. Inverse operating time characteristics for second (U>/< )  . window Inverse operating time controls voltage back to the set target window faster if the deviation is bigger and slower when deviation is smaller. © Arcteq Relays Ltd...
  • Page 220 This function is used in the AVR until the measured voltage is below the set instant low threshold level. After the set instant low threshold level is reached corresponding window time characteristics calculate the consecutive time delays until the desired target window is reached. © Arcteq Relays Ltd...
  • Page 221 For example if the maximum allowed overvoltage is 10% by local standards and tap effect for the transformer is 1.67% instant low function pick-up should be set 10% - 1.67% = 8.33%. © Arcteq Relays Ltd...
  • Page 222 AVRs low voltage blocking prevents the operation of the tap changer control in case of heavy short circuit faults in the feeding network side as well as the drifting of the tap to maximum voltage increase position during power off situations. © Arcteq Relays Ltd...
  • Page 223 Table. 5.5.1. - 171. Measurement magnitudes used by the AVR function. Signal Description Time base U12 System Phase to phase system voltage U12 5 ms U23 System Phase to phase system voltage U23 5 ms © Arcteq Relays Ltd...
  • Page 224 Internal information about settings. If the value differs from 4b: U< set lower (settings 0 settings are not correct. than U<< are ok) (bitmask) 5b: U>>> set too 6b: U<<< set too high 7b: VT selection not ok © Arcteq Relays Ltd...
  • Page 225 Absolute tap Tap location in the tap changer in relation to whole range 0…50 location 0…max tap steps. Tap changer on Indication if the tap changer has reached maximum 0:No 0:No high border voltage high position 1:Yes © Arcteq Relays Ltd...
  • Page 226 Setting is high 0.010…20.000mA 0.001mA 4.000mA visible if any of the mA position range indication modes are selected. © Arcteq Relays Ltd...
  • Page 227 High voltage limit for the low set voltage window 0.01% 0.88% (visible if U>/< window 30.00% in use) U< setting (-UTGT) 0.10… Low voltage limit for the low set voltage window 0.01% 0.88% (visible if U>/< window 30.00% in use) © Arcteq Relays Ltd...
  • Page 228 Commissioning block for the actual controlling of the output contacts. Blocks only the output contacts from control outs the AVR function. Output signals Following output signals available in the AVR function. Table. 5.5.1. - 181. AVR output signals Name Description © Arcteq Relays Ltd...
  • Page 229 Tap Lower command Off 7364 VRG1 Block operation On 7365 VRG1 Block Operation Off 7366 VRG1 Block Output commands On 7367 VRG1 Block Output commands Off 7368 VRG1 Low voltage blocking On 7369 VRG1 Low voltage blocking Off © Arcteq Relays Ltd...

  • Page 230: Setting Group Selection (Sgs)

    If setting group is not activated but is tried to control on with SGS an event of failed setting group change is issued. In the following gure is presented the simpli ed function block diagram of the SGS function. © Arcteq Relays Ltd...
  • Page 231 1 shall not be automatically selected and the logic needs separate control to set the active setting group back to group 1. Figure. 5.5.2. - 118. Group changing example sequence with pulse control only or with pulses and static signal. © Arcteq Relays Ltd...
  • Page 232 Setting group 3 selection, third highest priority input for setting group control. Can be Setting 0:Not active controlled with pulse or steady state signals. If steady state signal is applied no lower group3 active 1:Active priority than SG1 and SG2 requests shall be processed. © Arcteq Relays Ltd...
  • Page 233 SG8 Enabled 4173 SG8 Disabled 4174 SG1 Request On 4175 SG1 Request Off 4176 SG2 Request On 4177 SG2 Request Off 4178 SG3 Request On 4179 SG3 Request Off 4180 SG4 Request On 4181 SG4 Request Off © Arcteq Relays Ltd...
  • Page 234 SG7 Active On 4215 SG7 Active Off 4216 SG8 Active On 4217 SG8 Active Off Example applications for setting group control In this chapter are presented some of most common applications for setting group changing requirements. © Arcteq Relays Ltd...
  • Page 235 1 wire control. By that way single wire loss will not effect to the correct setting group selection. Figure. 5.5.2. - 121. Setting group control with 2 wire connection from Petersen coil status. © Arcteq Relays Ltd...
  • Page 236 SG while with “On” signal would be controlled higher priority SG1. By this way after the automatic control is over SG would return automatically to SG2. Figure. 5.5.2. - 124. Example of setting default SG constant signal. © Arcteq Relays Ltd...

  • Page 237: Object Control And Monitoring (Obj)

    The signals can be divided into Monitor, Command and Control signals based on how they are dealt in the function. These input signals are also setting parameters for the function. The amount of needed control and setting parameters depend of the selected object type. © Arcteq Relays Ltd...
  • Page 238 Remote Close signal from communication protocols. Signal Objectx Remote Open Pre-assigned Remote Open signal from communication protocols. Signal Objectx Local Close Local Close signal from HMI, either select-execute from the mimic SLD or direct Pre-assigned Signal from the local panel pushbutton. © Arcteq Relays Ltd...
  • Page 239 CB, WD cart in or out and if object ready is in use (MC) or just monitoring of status (E.switch). Disconnector (NC) Selection if synchrocheck condition is in use for circuit breaker close Synchrocheck command. © Arcteq Relays Ltd...
  • Page 240 For each controllable object can be set interlocking and blocking conditions for open and close separately.  Blocking and interlocking can be based on other object statuses, software function or binary input. For example, interlocking can be set for object close based on earthing disconnector position. © Arcteq Relays Ltd...
  • Page 241 OBJ 1...10 Object Open OBJ 1...10 Object Close OBJ 1...10 Object Bad OBJ 1...10 WD Intermediate OBJ 1...10 WD Out OBJ 1...10 WD in OBJ 1...10 WD Bad OBJ 1...10 Open Request On OBJ 1...10 Open Fail © Arcteq Relays Ltd...

  • Page 242: Indicator Object Monitoring (Cin)

    Events can be enabled or disabled according to the application requirements. Events The indicator function generates events and registers from the status changes of monitored signals. To main event buffer is possible to select status “On” or “Off” messages. © Arcteq Relays Ltd...
  • Page 243 10817 CIN7 Open 10818 CIN7 Close 10819 CIN7 10880 CIN8 Intermediate 10881 CIN8 Open 10882 CIN8 Close 10883 CIN8 10944 CIN9 Intermediate 10945 CIN9 Open 10946 CIN9 Close 10947 CIN9 11008 CIN10 Intermediate 11009 CIN10 Open © Arcteq Relays Ltd...

  • Page 244: Synchrocheck Function Δv/Δa/Δf

    SYN3 supervises the synchronization condition between U3 and U4 channels. Figure. 5.5.5. - 127. Example connection of synchrocheck function in 3LN+U4 mode when the SYN1 stage is in use and UL1 is the reference voltage. © Arcteq Relays Ltd...
  • Page 245 Figure. 5.5.5. - 128. Example connection of synchrocheck function in 2LL+U3+U0 mode when the SYN2 stage is in use and UL12 is the reference voltage. Figure. 5.5.5. - 129. Example connection of synchrocheck function in 2LL+U3+U4 mode when the SYN3 stage is in use and UL12 is the reference voltage. © Arcteq Relays Ltd...
  • Page 246 AQ-T257 Instruction manual Version: 2.00 Figure. 5.5.5. - 130. Example application of synchrocheck over one breaker in 3LL and 3LN VT connection situations. © Arcteq Relays Ltd...
  • Page 247 AQ-T257 Instruction manual Version: 2.00 Figure. 5.5.5. - 131. Example application of synchrocheck over one breaker with 2LL VT connection. © Arcteq Relays Ltd...
  • Page 248 AQ-T257 Instruction manual Version: 2.00 Figure. 5.5.5. - 132. Example application of synchrocheck over two breakers in 2LL+U3+U4 mode. Reference of the U3 or U4 voltages may be U12, U23 or U31. © Arcteq Relays Ltd...
  • Page 249 U live > and U dead <   parameters. Parameter Syn U conditions is used to determine which conditions have to be met in addition to the previously mentioned three aspects to consider the systems synchronized. © Arcteq Relays Ltd...
  • Page 250 If SYN OK function has been activated before blocking signal it will reset. From blocking of the function a HMI display event as well as time stamped blocking event with information of the startup voltage values and fault type is issued. © Arcteq Relays Ltd...
  • Page 251 The synchrocheck function generates events and registers from the status changes like syn ok, bypass and blocked. To main event buffer is possible to select status “On” or “Off” messages. The synchrocheck function offers three independent instances which events are segregated for each instance operation. © Arcteq Relays Ltd...
  • Page 252 SYN3 Blocked Off 2910 SYN1 SYN3 Ok On 2911 SYN1 SYN3 Ok Off 2912 SYN1 SYN3 Bypass On 2913 SYN1 SYN3 Bypass Off 2914 SYN1 SYN3 Volt condition OK 2915 SYN1 SYN3 Volt cond not match © Arcteq Relays Ltd...

  • Page 253: Ma Output Control

    Table. 5.5.6. - 198. Main settings of the mA outputs Name Range Default Description Enable mA Out Channels 1&2 0:Disabled mA option card 1 0:Disabled Enables mA output cards outputs. Enable mA Out Channels 3&4 1:Enabled © Arcteq Relays Ltd...
  • Page 254 Output 1-4 Hardware 3=SlotC; found 4=SlotD; 5=SlotE; 6=SlotF; 7=SlotG; Indicates in which option card slot mA output card is 8=SlotH; located in. 9=SlotI; 10=SlotJ; 11=SlotK; mA Output 5-8 Hardware 12=SlotL; found 13=SlotM; 14=SlotN; 15=Too many cards installed © Arcteq Relays Ltd...
  • Page 255 For example, a value for the lter time constant is 2 seconds for a 1 second period time of a disturbance oscillation. © Arcteq Relays Ltd...
  • Page 256 0:Floating point 1:Integer out Scaled value (Floor) 0:Floating Rounds the milliamp signal output as selected, handling 2:Integer point (Ceiling) 3:Integer (Nearest) Input value 1 0...4000 0.00001 Measured milliamp input value at curve point 1. © Arcteq Relays Ltd...

  • Page 257: Monitoring Functions

    ON/OFF events to the common event buffer from each of the two output signal. Time stamp resolution is 1ms. Function provides also cumulative counters for CTS alarm and BLOCKED events. Simpli ed function block diagram of CTS functionIn is presented in the following gure . © Arcteq Relays Ltd...
  • Page 258 Fundamental angle of phase L2/B current 5 ms IL3 Ang Fundamental angle of phase L3/C current 5 ms I01 Ang Fundamental angle of residual input I01 5 ms I02 Ang Fundamental angle of residual input I02 5 ms © Arcteq Relays Ltd...
  • Page 259 If blocking signal is active when pick-up element activates a BLOCKED signal will be generated and the function shall not process the situation further. If START function has been activated before blocking signal it will reset and the release time characteristics are processed as in case of when pick-up signal is reset. © Arcteq Relays Ltd...
  • Page 260 General properties of a protection function. Typical CTS cases In following gures are presented few typical cases of CTS situations and setting effects. Figure. 5.6.1. - 142. System in case when all is working properly and no fault is present. © Arcteq Relays Ltd...
  • Page 261 CTS conditions and as well as in the secondary circuit fault the CTS will issue alarm if this state continues until the set time has been spent. This means that the CTS do not supervise only the secondary circuit but also the primary circuit. © Arcteq Relays Ltd...
  • Page 262 By adjusting the Iset Highlimit and Iset Lowlimit setting parameters according to the application normal behavior, the operation of the CTS can be set to very sensitive for broken circuit/conductor faults. © Arcteq Relays Ltd...
  • Page 263 Figure. 5.6.1. - 148. System in case when secondary phase current wiring is broken. When phase current wire is broken all of the conditions are met in the CTS and alarm shall be issued in case if the situation continues until the set alarming time is met. © Arcteq Relays Ltd...
  • Page 264 Function includes 12 last registers where the triggering event of the function (ALARM activated or blocked) is recorded with time stamp and process data values. Table. 5.6.1. - 207. Event codes of the CTS function instance Event Number Event channel Event block name Event Code Description © Arcteq Relays Ltd...

  • Page 265: Fuse Failure Vts (60)

    Fundamental RMS measurement of voltage U 5 ms Positive sequence voltage 5 ms Negative sequence voltage 5 ms Zero sequence voltage 5 ms Fundamental angle of U voltage 5 ms Fundamental angle of U voltage 5 ms © Arcteq Relays Ltd...
  • Page 266 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...
  • Page 267 VTS function register content. This information is available in 12 last recorded events for all provided instances separately. Table. 5.6.2. - 212. Register content. Event Volt 1,2,3 Input A,B,C Trip time Used Date & Time System status status angle diff remaining code © Arcteq Relays Ltd...

  • Page 268: Disturbance Recorder (Dr)

    U 8/16/32/64s/c 1(2) Line to neutral U or line to line voltage U 8/16/32/64s/c 2(3) Line to neutral U ,line to line voltage U , zero sequence voltage U or synchrocheck voltage 8/16/32/64s/c 3(1) © Arcteq Relays Ltd...
  • Page 269 Maximum amount of recordings possible to store in the memory of IED. 0…2 recordings Max length 0…1800 s 0.001 Maximum settable length of a single recording, recording Recordings How many recordings stored in the memory of IED. 0…2 in memory © Arcteq Relays Ltd...
  • Page 270 200ms is recorded before “I> TRIP” and 800ms is recorder after. 4. Sample of each recorder analog signal is taken 64 times in a cycle. With 50Hz system frequency it means that sample is taken every 312.5µs. Digital channels are tracked every 5 milliseconds. © Arcteq Relays Ltd...
  • Page 271 Though if needed it is also possible to con rm the length by using the following calculation. Please note that the following calculation assumes that DR doesn’t share the 64MB space with any other les in the FTP. © Arcteq Relays Ltd...
  • Page 272 Recordings are packed comtrade les. Zip- le includes *.cfg and *.dat. AQviewer is capable to open original packed zip les directly or comtrade les as they are as far as both *.cfg and *.dat are located in same directory. Figure. 5.6.3. - 152. Open stored recordings. © Arcteq Relays Ltd...
  • Page 273 -text appears when moving mouse cursor is on top of the icon. In this example line to neutral voltages UL1, Ul2 and UL3 are selected and moved to the right side. Con rm plotter by pressing OK –key. © Arcteq Relays Ltd...
  • Page 274 The DR function generates events from the status changes of the function. To main event buffer is possible to select status “On” or “Off” messages. Table. 5.6.3. - 215. Event codes of DR function. Event Number Event channel Event block name Event Code Description 4096 Recorder triggered On © Arcteq Relays Ltd...

  • Page 275: Measurement Recorder

    Record le location can be changed by editing the “Path”- eld. File name can be changed from the “File Name”- eld.  Hitting the red “Record”-button will start the recorder. Closing the measurement recorder-dialog will not stop the recording. To stop the recording, blue “Stop”-button must be pressed. © Arcteq Relays Ltd...
  • Page 276 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 Sec.Pha.Curr.IL3 U1Volt Pri TRMS L2 Exp.React.Ind.E.kvarh Sec.Res.Curr.I01 U2Volt Pri TRMS L2 Imp.React.Ind.E.Mvarh © Arcteq Relays Ltd...
  • Page 277 P-P Curr.I01 System Volt UL23 mag (kV) Exp/Imp React.Ind.E.bal.Mvarh P-P Curr.I02 System Volt UL31 mag Exp/Imp React.Ind.E.bal.kvarh Pha.angle IL1 System Volt UL31 mag (kV) Other measurements Pha.angle IL2 System Volt UL1 mag TM> Trip expect mode © Arcteq Relays Ltd...
  • Page 278 Pha.Curr.I”L2 L2 Cos(phi) L1 Char current Pha.Curr.I”L3 L3 Apparent Power (S) L2 Bias current Res.Curr.I”01 L3 Active Power (P) L2 Diff current Res.Curr.I”02 L3 Reactive Power (Q) L2 Char current Calc.I”0 L3 Tan(phi) L3 Bias current © Arcteq Relays Ltd...

  • Page 279: Circuit Breaker Wear-Monitor (Cbw)

    CBW function is integrated into the controllable object function and can be enabled and set under object function. CBW function is independent function and initializes as separate independent instance which has own events and settings not related to the object it is linked © Arcteq Relays Ltd...
  • Page 280 Alarm 1 and Alarm 2 events. Operations left for each phase can be monitored also in the function. In the following gure the simpli ed function block diagram of the CBW function is presented. Figure. 5.6.5. - 157. Simpli ed function block diagram of the CBW function. © Arcteq Relays Ltd...
  • Page 281 Enable / Disable selection of the Alarm 1 stage Alarm 1 1: Enabled Alarm 1 0 … 200000 Pick-up threshold for remaining operations. When the remaining 1000op operations operation operations is below this setting Alarm 1 signal is activated. © Arcteq Relays Ltd...
  • Page 282 Alarm 2 signal is activated. Setting example Setting example: Tavrida ISM/TEL-24-16 / 800 – 057 circuit breaker Set the CBW stage as follows: Parameter Value Current 1 (Inom) 0.80 kA © Arcteq Relays Ltd...

  • Page 283: Total Harmonic Distortion Monitor (Thd)

    Monitoring of the THD of the currents can be used to alarm in case if the harmonic content rises too high in cases if either the electric quality requirement exist in the protected unit or in cases if process generated harmonics needs to be monitored. © Arcteq Relays Ltd...
  • Page 284 Time stamp resolution is 1ms. Function provides also cumulative counters for THD Start and Alarm act and BLOCKED events. In the following gure is presented the simpli ed function block diagram of the THD function. © Arcteq Relays Ltd...
  • Page 285 Default 1:Amplitude Measurement De nes which available measured magnitude of THD is used by 1:Amplitude magnitude the function. 2:Powers 1:Side1 De nes which current measurement module is used by the THD in side 1:Side1 function. 2:Side2 © Arcteq Relays Ltd...
  • Page 286 5 ms before the set operating delay has passedfor blocking to be active in time. Operating time characteristics for activation and reset The operating timers’ behavior of the function can be set for activation and the cold load pick up situation monitoring and release. © Arcteq Relays Ltd...
  • Page 287 Table. 5.6.6. - 228. Register content. Event Used Date & Time Trem Trem Trem code dd.mm.yyyy 3521-3534 Time left to Alarm on the Measured THD values on the trigger event. 1 - 8 hh:mm:ss.mss Descr. trigger event © Arcteq Relays Ltd...

  • Page 288: Measurement Value Recorder

    Positive and negative sequence voltages. UL1Ang, UL2Ang, UL3Ang, UL12Ang, UL23Ang, UL31Ang Angles of phase voltages, phase-to-phase voltages and residual voltages. U0Ang, U0CalcAng U1 Pos.seq V Ang, U2 Neg.seq V Positive and negative sequence angles. Powers Description © Arcteq Relays Ltd...
  • Page 289 1:I> Trip 2:I>> Trip 3:I>>> Trip 4:I>>>> Trip 5:IDir> Trip 6:IDir>> Trip 7:IDir>>> Trip Tripped stage 8:IDir>>>> Trip Tripped stage 9:U> Trip 10:U>> Trip 11:U>>> Trip 12:U>>>> Trip 13:U< Trip 14:U<< Trip 15:U<<< Trip 16:U<<<< Trip © Arcteq Relays Ltd...
  • Page 290 VREC function generates events from function triggering. To main event buffer it is possible to select “On” or “Off” status messages. Table. 5.6.7. - 230. Event codes of the VREC function. Event Number Event channel Event block name Event Code Description 9984 VREC1 Recorder triggered On 9985 VREC1 Recorder triggered Off © Arcteq Relays Ltd...

  • Page 291: System Integration

    Following Modbus function types are supported: Read Holding Register, 3 Write Single Register, 6 Write Multiple Registers, 16 Read/Write Multiple Registers, 23 Following data can be accessed using both Modbus TCP and Modbus RTU Device measurements Device I/O Commands Events Time © Arcteq Relays Ltd...

  • Page 292: Modbusio

    Channel selection for the module. For each of the 8 channels of the IO module connected thermocouple can be selected. T.C. type [+-20mA,Type J, Type K, Type T, Type E, Type R, Type S] Thermocouple type setting. © Arcteq Relays Ltd...

  • Page 293: Iec 61850

    Time synchronization Currently used 61850 setup of the device can be viewed in the IEC61850 tool ( Tools → IEC61850 ). For a list of available Logical Nodes in the Arcteq implementation browse the 61850 tree. See following picture: Figure. 6.1.4. - 160. IEC 61850 tool buttons.
  • Page 294 BRCB’s. All of these datasets can be edited. By un-checking both of the GOOSE publisher datasets GOOSE publisher service will be disabled. See following picture. Figure. 6.1.4. - 162. DataSets window for adding/removing and editing datasets. © Arcteq Relays Ltd...

  • Page 295: Goose

    Enable setting for GOOSE subscriber. 6.1.5. GOOSE Both GOOSE publisher and subscriber are supported by the Arcteq implementation. GOOSE subscriber is enabled by parameter setting ( Communication → Protocols → IEC61850 → GOOSE subscriber enable ) and GOOSE inputs are con gured using HMI or Aqtivate tool. For each of the Goose inputs there is also an input quality signal which can also be used in the internal logic.
  • Page 296 GOOSE input signals on the receiving side together with the quality information for that binary signal. The quality information in the incoming frame will be ORed with GOOSE reception timeout supervision information so that quality information for each GOOSE input can be used in relay logic. © Arcteq Relays Ltd...

  • Page 297: Iec 103

    (slave). The IEC 103 protocol can be selected for the available serial ports of the device. A master or primary station can communicate with the Arcteq device and receive information by polling from the slave device. Disturbance recordings transfer is not supported.

  • Page 298: Spa Protocol

    , harmonic 9 , harmonic 11 , harmonic 13 , harmonic h., 15 h., 17 h., 19 , harmonic 17 , harmonic 19 harmonic current. I1,I2,I0Z Positive sequence current, negative sequence current and zero sequence current © Arcteq Relays Ltd...
  • Page 299 System f. Used tracking frequency at the moment Ref f1 Reference frequency 1 Ref f2 Reference frequency 1 M thermal T Motor thermal temperature F thermal T Feeder thermal temperature T thermal T Transformer thermal temperature © Arcteq Relays Ltd...
  • Page 300 Scale current values to primary 1:Yes values 0:Currents; 1:Voltages; 2:Powers; Slot 1…8 Magnitude selection Selection of slots measured magnitude category 3:Imp.(ZRX).Adm. (YGB); 4:Others; Described in table Selection of the magnitude in the previously selected Slot 1…8 Magnitude (x) above category © Arcteq Relays Ltd...

  • Page 301: Applications And Connection Examples

    AQ-T257 Instruction manual Version: 2.00 7. Applications and connection examples 7.1. Connections AQ-T257 Figure. 7.1. - 165. AQ-T257 variant without add-on modules. © Arcteq Relays Ltd...
  • Page 302 AQ-T257 Instruction manual Version: 2.00 Figure. 7.1. - 166. AQ-T257 variant with binary input and output modules. © Arcteq Relays Ltd...
  • Page 303 AQ-T257 Instruction manual Version: 2.00 Figure. 7.1. - 167. AQ-T257 application example with function block diagram. © Arcteq Relays Ltd...
  • Page 304 AQ-T257 Instruction manual Version: 2.00 © Arcteq Relays Ltd...

  • Page 305: Example 2 Winding Transformer Protection Connection

    Version: 2.00 7.2. Example 2 winding transformer protection connection An application example of 2 winding transformer differential relay AQ-T257. Regular differential scheme with high voltage side restricted earth-fault protection. Figure. 7.2. - 168. Application example for AQ-T257 2 winding transformer protection 7.3.
  • Page 306 Figure. 7.3. - 170. The digital input used for TCS needs to have normally closed polarity and 1.0 second activation delay to avoid nuisance alarms while circuit breaker is controlled open. Non-latched outputs are seen in the output matrix as hollow circles. Latched contacts are painted. See below presented gure. © Arcteq Relays Ltd...
  • Page 307 IED. Figure. 7.3. - 172. Trip circuit supervision by using one DI and latched output contact. © Arcteq Relays Ltd...
  • Page 308 While the breaker is open the logic is blocked. Logical output can be used in output matrix or in SCADA as pleased. Figure. 7.3. - 173. TCS block scheme when non-latched trip output is not used. © Arcteq Relays Ltd...

  • Page 309: Construction And Installation

    IO module, integrated Arc –protection or any special module provided. Only differentiating factor in the device scalability is considering the M and N slots which also support communication options. In the gure below is presented a fully optioned model AQ-X257-XXXXXXX- BBBCCCCCJ of the AQ-X257 IED family. © Arcteq Relays Ltd...
  • Page 310 For a eld upgrade this means that the add-on module must be ordered from Arcteq Ltd. or representative who shall provide the add-on module with corresponding unlocking code in order the device to be operating correctly after upgrading the hardware con guration.
  • Page 311 Comm. port 3 etc. since in the CPU-module already exist Comm. ports 1 and 2. After communication port is detected it is added into the communication space in the IED and corresponding settings are enabled for the IED. © Arcteq Relays Ltd...

  • Page 312: Cpu, Io And Power Supply Module

    Output relay 1, Normally open contact X1-7:8 Output relay 2, Normally open contact X1-9:10 Output relay 3, Normally open contact X1-11:12 Output relay 4, Normally open contact Output relay 5, Changeover contact 13:14:15 System Fault output relay, Changeover contact 16:17:18 © Arcteq Relays Ltd...
  • Page 313 In case the binary input is connected directly to binary output (T1…Tx) it takes additional third 5 millisecond round. When binary input is controlling internally binary output it takes 0…15 milliseconds in theory and 2…13 milliseconds in practice. This delay excludes the mechanical delay of the relay.  © Arcteq Relays Ltd...

  • Page 314: Current Measurement Module

    Quantization of the measurement signal is applied with 18 bit AD converters and the sample rate of the signal shall be 64 samples / power cycle in system frequency range of 6 Hz to 75 Hz. For further details refer to the “Technical data” section of this document. © Arcteq Relays Ltd...

  • Page 315: Voltage Measurement Module

    Quantization of the measurement signal is applied with 18 bit AD converters and the sample rate of the signal shall be 64 samples / power cycle in system frequency range of 6 Hz to 75 Hz. For further details refer to the “Technical data” section of this document. © Arcteq Relays Ltd...

  • Page 316: Binary Input Module (Di8) (Option)

    NO/NC (normally open/-closed) selection. Naming convention of the binary inputs provided by this module is presented in the chapter 6 Construction and installation. For technical details refer to the “Technical data” section of this document © Arcteq Relays Ltd...
  • Page 317 User settable normal state (normally open/normally closed) de nes if the digital input is considered activated when the digital input channel is energized. Figure. 8.5. - 181. Digital input state when energizing and de-energizing the digital input channels. © Arcteq Relays Ltd...

  • Page 318: Binary Output Module (Do5) (Option)

    All output contacts are mechanical type. Rated voltage of the NO/CO outputs is 250VAC/DC. Naming convention of the binary outputs provided by this module is presented in the chapter Construction and installation. For further details refer to the “Technical data” section of this document. © Arcteq Relays Ltd...

  • Page 319: Arc Protection Module (Option)

    Notice that the delay of binary input lies between 5…10ms. BI and HSO1…2 are not visible in Device IO → Binary Inputs or Binary Outputs -menus. Binary input and high speed outputs are programmable only in Arc Matrix menu. © Arcteq Relays Ltd...

  • Page 320: Rtd & Ma Input Module (Option)

    Supported Thermocouple: Type K, Type J, Type T and Type S Two mA-input channels are also available in the option card. If mA-input channels are used only the four rst channels are available for RTD and TC measurements. © Arcteq Relays Ltd...

  • Page 321: Serial Rs232 Communication Module (Option)

    AQ-T257 Instruction manual Version: 2.00 Figure. 8.8. - 185. Connection of different sensor types. 8.9. Serial RS232 communication module (option) Figure. 8.9. - 186. AQ-2xx Serial RS232-card connectors © Arcteq Relays Ltd...
  • Page 322  Option card includes two serial communication interfaces. COM E is a serial ber interface with glass/plastic option. COM F is a RS-232 interface. To use COM F IRIG-B time sync Time sync source should be set to IRIG-B in General menu. © Arcteq Relays Ltd...

  • Page 323: Lc100 Ethernet Communication Module (Option)

    Optional LC 100 Mbps Ethernet card supports HSR and PRP protocols according to IEC 61850 substation communication standard. Card has IEEE1588 (PIP) clock sync functionality. Card has two PRP/HSR ports which are 100Mbps ber ports and can be con gured to 100Mbps or 10 Mbps. © Arcteq Relays Ltd...

  • Page 324: Maout & Mainput Module (Option)

    When installing to a rack, the device will take ½ of the rack width and total of two devices can be installed to same rack in parallel. Device panel installation and cut-outs are described below. © Arcteq Relays Ltd...
  • Page 325 AQ-T257 Instruction manual Version: 2.00 Figure. 8.12. - 189. Dimensions of the IED. Figure. 8.12. - 190. Installation of the IED © Arcteq Relays Ltd...
  • Page 326 AQ-T257 Instruction manual Version: 2.00 Figure. 8.12. - 191. Panel cut-out and spacing of the IED. © Arcteq Relays Ltd...

  • Page 327: Technical Data

    Figure. 9.1.1.1. - 192. Energy and power metering accuracy in optional 0.2 S accuracy model (See order code for details). 9.1.1.2. Current measurement Table. 9.1.1.2. - 241. Current measurement module Phase current inputs (A, B, C) © Arcteq Relays Ltd...
  • Page 328 6Hz to 75Hz fundamental, up to 31st harmonic current Current measurement range 1mA…75A(rms) 0.002xIn…25xIn < ±0.5% or < ±0.6mA Current measurement inaccuracy 25xIn…375xIn < ±1.0% < ±0.2 ° (I > 0.01A) Angle measurement inaccuracy < ±1.0 ° (I ≤ 0.01A) Burden (50Hz/60Hz) <0.1VA © Arcteq Relays Ltd...

  • Page 329: Voltage Measurement

    Frequency measurement performance Frequency measuring range 6…75 Hz fundamental, up to 31 harmonic current or voltage Inaccuracy 10 mHz 9.1.2. CPU & Power supply 9.1.2.1. Auxiliary voltage Table. 9.1.2.1. - 244. Power supply model A Rated values © Arcteq Relays Ltd...

  • Page 330: Cpu Communication Ports

    Cannot be used for system protocols, only for local programming Table. 9.1.2.2. - 247. Rear panel system communication port A Port Port media Copper Ethernet RJ-45 Number of ports 1pcs Features IEC61850 IEC104 Modbus TCP Port protocols DNP 3.0 Telnet © Arcteq Relays Ltd...

  • Page 331: Cpu Binary Inputs

    Table. 9.1.2.4. - 250. Normal Open binary outputs Rated values Rated auxiliary voltage 265V(AC/DC) Continuous carry Make and carry 0.5s Make and carry 3s Breaking capacity, DC (L/R = 40 ms) at 48VDC at 110 VDC 0.4A at 220 VDC 0.2A © Arcteq Relays Ltd...

  • Page 332: Option Cards

    Software settable: Normally On / Normally Off Terminal block connection Solid or stranded wire Maximum wire diameter: 2.5mm Phoenix Contact MSTB2,5-5,08 9.1.3.2. Binary output module Table. 9.1.3.2. - 253. Binary output module technical data Rated values © Arcteq Relays Ltd...

  • Page 333: Arc Protection Module

    Control rate Operation delay <1ms Polarity Normally Off Contact material Semiconductor Terminal block connection Maximum wire diameter: Solid or stranded wire Phoenix Contact MSTB2,5-5,08 2.5mm Table. 9.1.3.3. - 256. Binary input channel Rated values Voltage withstand 265Vdc © Arcteq Relays Ltd...

  • Page 334: Maout & Main Module

    Table. 9.1.3.5. - 258. RTD & mA input module technical data Channels 1-8 2/3/4-wire RTD and thermocouple sensors Pt100 or Pt1000 Type K, Type J, Type T and Type S Channels 7 & 8 support mA measurement Measurement range mA input range 0-33mA © Arcteq Relays Ltd...

  • Page 335: Rs232 & Serial Ber Communication Module

    RGB color 9.2. Functions 9.2.1. Protection functions 9.2.1.1. Non-directional overcurrent (50/51) I> Table. 9.2.1.1. - 262. Non-directional overcurrent (50/51) technical data Input signals Phase current fundamental freq RMS Input magnitudes Phase current TRMS Phase current peak-to-peak Pick-up © Arcteq Relays Ltd...

  • Page 336: Non-Directional Earth Fault (50N/51N) I0

    ±1.0 mA (0.005…25.0 x I -Starting I02 (0.2 A) -Starting I0Calc (5 A) ±1.0 %I0 or ±15 mA (0.005…4.0 x I Operating time De nite time function operating time setting 0.00…1800.00 s, setting step 0.005 s © Arcteq Relays Ltd...

  • Page 337: Directional Overcurrent (67) Idir

    -De nite Time (Im/Iset ratio > 3) ±1.0 % or ±20 ms -De nite Time (Im/Iset ratio 1.05…3) ±1.0 % or ±35 ms IDMT operating time setting (ANSI / IEC) 0.02…1800.00 s, setting step 0.001 x parameter © Arcteq Relays Ltd...

  • Page 338: Directional Earth Fault(67N) Iodir

    ±2.5 %U0 U0/I0 angle (U > 15 V) ±0.1 ° (I0Calc ±1.0 °) U0/I0 angle (U = 1…15 V) ±1.0 ° Operation time De nite time function operating time setting 0.00…1800.00 s, setting step 0.005 s © Arcteq Relays Ltd...

  • Page 339: Current Unbalance (46/46R/46L) I2

    B    IDMT Constant 0…5.0000    step 0.0001 C    IDMT Constant 0…250.0000    step 0.0001 Inaccuracy -IDMT operating time ±1.5 % or ±20 ms -IDMT minimum operating time; 20 ms ±20 ms Retardation time (overshoot) <5 ms Instant operation time © Arcteq Relays Ltd...

  • Page 340: Harmonic Overcurrent (50H/51H, 68) Ih

    Inaccuracy: Reset time ±1.0 % or ±35 ms Instant reset time and start-up reset <50 ms Note! Harmonics generally:  Amplitude of harmonic content has to be least 0.02 x In when relative (Ih/IL) mode is used. © Arcteq Relays Ltd...

  • Page 341: Circuit Breaker Failure Protection (50Bf/52Bf) Cbfp

    0.01…50.00 x In, setting step 0.01 Inaccuracy ±3% of set pick-up value > 0.5 x In setting. - Starting ±5 mA < 0.5 x In setting Operation time Instant operation time 1.05 x Iset <30ms Reset © Arcteq Relays Ltd...

  • Page 342: Overvoltage (59) U

    Table. 9.2.1.10. - 271. Under voltage (27) technical data Input signals P-P voltage fundamental frequency RMS Input magnitudes P-E voltage fundamental frequency RMS Pick-up 1 voltage Pick-up terms 2 voltages 3 voltages Pick-up setting 0.00…120.00 %Un, setting step 0.01 %Un © Arcteq Relays Ltd...

  • Page 343: Neutral Overvoltage (59N) U0

      or ±30 mV -Voltage U0 -Voltage U0Calc ±150 mV Operation time De nite time function operating time setting 0.00…1800.00 s, setting step 0.005 s Inaccuracy -De nite Time (U0m/U0set ratio 1.05→) ±1.0 % or ±45 ms © Arcteq Relays Ltd...

  • Page 344: Sequence Voltage (47/27Pn/59Pn) U1/2

    ±1.5 % or ±20 ms -IDMT minimum operating time; 20 ms ±20 ms Instant operation time Start time and instant operation time (trip): <65 ms -Um/Uset ratio 0.95/1.05→ Reset Reset ratio 97/103 % of pick-up voltage setting © Arcteq Relays Ltd...

  • Page 345: Over-/Under Frequency (81O/81U) F

    7...75 Hz. 9.2.1.14. Rate-of-change-frequency (81R) df/dt>/< Table. 9.2.1.14. - 275. Rate-of-change-frequency (81R) technical data Input signals Fixed Sampling mode Tracking Freq reference1 CT1IL1, CT2IL1, VT1U1, VT2U1 Freq reference2 CT1IL2, CT2IL2, VT1U2, VT2U2 Freq reference3 CT1IL3, CT2IL3, VT1U3, VT2U3 © Arcteq Relays Ltd...

  • Page 346: Transformer Thermal Overload (49T) T

    -    Thermal Trip (0…150% by step of 1%)      Trip delay (0.000…3600.000s by step of 0.005s) -    Restart Inhibit (0…150% by step of 1%) Inaccuracy -    Starting ±0.5% of set pick-up value -    Operating time ±5 % or ± 500ms © Arcteq Relays Ltd...

  • Page 347: Active/Reactive/Apparent Power Protection (32/37) Pqs

    101.00…2000.00 deg, setting step 0.1 deg either under or over setting. Inaccuracy ±3% of set pick-up value Reset ratio 97% of the pick-up setting Operation Operating time Typically <500 ms 9.2.1.18. Transformer monitoring function (TRF) Table. 9.2.1.18. - 279. Transformer monitoring function (TRF) technical data Features © Arcteq Relays Ltd...

  • Page 348: Transformer Differential (87T,87R) Idb>, Idi>,Hv Iod>, Lv Iod

    0.01…50.00% by step of 0.01%, Default 35.00% Pick-up Inaccuracy ±2.5 %I or ±50 mA (0.10…4.0 x ISET) Differential current ±1.5 %I harmonic SIDE1 Instant operation time Instant operation time <40 ms (Harmonic blocking active) >1.05xISET © Arcteq Relays Ltd...

  • Page 349: Arc Protection (50Arc/50Narc) Iarc> I0Arc> (Option)

    97 % Reset time <35 ms Note! Arc sensor maximum cable length is 200 meters. 9.2.2. Control functions 9.2.2.1. Automatic voltage regulator (90) (AVR) Table. 9.2.2.1. - 282. Automatic voltage regulator (AVR) technical data Input signals   © Arcteq Relays Ltd...

  • Page 350: Setting Group Selection

    Force change overrule of local controls either from setting tool, HMI or SCADA Operation time Reaction time <5 ms from receiving the control signal 9.2.2.3. Object control (OBJ) Table. 9.2.2.3. - 284. Object control (OBJ) technical data Signals Binary inputs Input signals Software signals © Arcteq Relays Ltd...

  • Page 351: Synchrocheck (25)

    U dead limit is not in use when set to 0 %Un. When SYN3 is used, SYN1 and SYN2 must have same reference voltage. In 3LN mode synchronization to L-N and L-L voltage both is possible. In 3LL/2LL modes synchronization only to L-L voltage is supported solution. © Arcteq Relays Ltd...

  • Page 352: Monitoring Functions

    0.00…1800.00 s, setting step 0.005 s Inaccuracy -De nite Time (Um/Uset ratio > 1.05 / 0.95) ±1.0 % or ±35 ms Instant operation time (alarm): (Um/Uset ratio > 1.05 / 0.95) <80 ms VTS MCB trip bus/line (external input) <50 ms © Arcteq Relays Ltd...

  • Page 353: Disturbance Recorder (Dr)

    - Operation counter ±0.5% of operations deducted 9.2.3.5. Total harmonic distortion (THD) Table. 9.2.3.5. - 290. Total harmonic distortion (THD) technical data Input signals Current measurement channels FFT result up to 31.st harmonic Input magnitudes component. Pick-up © Arcteq Relays Ltd...

  • Page 354: Voltage Memory (Integrated In 67,21G)

    Voltage memory (current) 97 % of pick-up current setting Reset time <50 ms 9.3. Tests and environmental Electrical environment compatibility Table. 9.3. - 292. Disturbance tests All tests CE approved and tested according to EN 60255-26 © Arcteq Relays Ltd...
  • Page 355 Table. 9.3. - 295. Environmental tests Damp Heat EN 60255-1, IEC 60068-2-30 Operational: 25-55°C, 97-93% Rh, 12+12h Dry Heat Storage: 70°C, 16h EN 60255-1, IEC 60068-2-2 Operational: 55°C, 16h Cold Test Storage: -40°C, 16h EN 60255-1, IEC 60068-2-1 Operational: -20°C, 16h © Arcteq Relays Ltd...
  • Page 356 Device dimensions (W x H x D mm) Casing height 208mm, width 257mm, depth 210mm Weight Net weight (Device) 1.5kg With package Weight Gross weight (With package) 2kg Package dimensions (W x H x D mm) 345(w) x 240(h) x 258(d) mm  © Arcteq Relays Ltd...

  • Page 357: Ordering Information

    AQ-T257 Instruction manual Version: 2.00 10. Ordering information Accessories Order code Description Note Manufacturer AQ-ACC-ADAM4016 ADAM-4016 RTD 6 ch RTD module with Modbus Requires external Advanced Co. Ltd. (Pt100/1000, Balco500, Ni) power module © Arcteq Relays Ltd...
  • Page 358 Arcteq Ltd. (8000 Lux threshold) AQ-02B Pressure and light point sensor unit Max. cable length 200m Arcteq Ltd. (25000 Lux threshold) AQ-02C Pressure and light point sensor unit Max. cable length 200m Arcteq Ltd. (50000 Lux threshold) © Arcteq Relays Ltd...

  • Page 359: Contact And Reference Information

    Wolf ntie 36 F 12 65200 Vaasa, Finland Contacts Phone: +358 10 3221 370 Fax: +358 10 3221 389 URL: url: www.arcteq. email sales: sales@arcteq. Technical support site: https://arcteq. /support-landing/ Technical support: +358 10 3221 388 (EET 8:00 – 16:00) © Arcteq Relays Ltd...

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