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85

Line differential protection (DIFL)

Chapter 11

Verifying settings by secondary

injection

When one of the protections is in test mode, the opposite terminal mode of operation is
changed. In the opposite terminal, the received current values (a and b Fourier coeffi-
cients) are echoed back to the other terminal, but transposed in the following way: the
received value for the L1 phase is returned as the L2 current, L2 is returned as L3, and
L3 as L1.

Figure 16: Stabilisation characteristic

Note!

When a current is injected into phase L1 in the terminal, it will appear as an IDiff in
phase L1 and L2 with 50% of the value as an IBias and in phase L3 with 25% of the
value as an IBias. When the current is sufficiently high, the protection will operate in
phase L1 and L2 in the terminal in test mode, but it will not operate in the remote ter-
minal. For the actual reading of IDiff and IBias, see step 6 in the test procedure. Also
see figure 16 and equations 5, 6 and 7.

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Содержание REL 551-C1 2.3 Series

Страница 1: ...AB 2001 Substation Automation Division Installation and commissioning manual REL 551 C1 2 3 Line differential protection terminal About this manual DocID 1MRK 506 106 UEN Issue date June 2001 Status New Version 2 3 Revision 00 ...

Страница 2: ...SIBLE THE DATA CONTAINED IN THIS MANUAL IS INTENDED SOLELY FOR THE PRODUCT DESCRIPTION AND IS NOT TO BE DEEMED TO BE A STATEMENT OF GUARANTEED PROPERTIES IN THE INTERESTS OF OUR CUSTOMERS WE CON STANTLY SEEK TO ENSURE THAT OUR PRODUCTS ARE DEVELOPED TO THE LATEST TECHNOLOGICAL STAN DARDS AS A RESULT IT IS POSSIBLE THAT THERE MAY BE SOME DIFFERENCES BETWEEN THE HW SW PRODUCT AND THIS INFORMATION PR...

Страница 3: ...rview 12 Chapter 4 Unpacking and checking the terminal 13 Receiving unpacking and checking 14 Chapter 5 Installing the terminal 15 Overview 16 Mounting the terminal 17 Mounting in a 19 inch rack 18 Mounting in a 19 inch rack with an additional box type RHGS 19 Mounting in a flush or semi flush installation 21 Mounting on a wall 24 Making the electrical connections 26 Connecting the CT circuits 26 ...

Страница 4: ...odem 44 Configuring the short range fibre optical modem 45 Configuring the short range galvanic modem 49 Configure the interface modules for V 36 X 21 and RS530 51 Configuring the interface modules for G 703 co directional 53 Chapter 9 Setting and configuring the terminal 55 Overview 56 Entering settings through the local HMI 57 Downloading settings and configuration from a PC 58 Establishing fron...

Страница 5: ...C 82 Measuring the operate limit of set values 82 Completing the test 83 Line differential protection DIFL 84 Testing the line differential protection 86 Testing the charging current compensation 88 Completing the test 90 Monitoring of AC analogue measurements 91 Monitoring of DC analogue measurements 92 Setting lockout HMI 94 Setting group selector GRP 95 Thermal overload protection THOL 96 Measu...

Страница 6: ...Contents Testing the interaction of the distance protection 109 ...

Страница 7: ...1 About this chapter Chapter 1 Introduction Chapter 1 Introduction About this chapter This chapter introduces the user to the manual as such ...

Страница 8: ...e used as a technical reference during the engineering phase installation and commissioning phase and during the normal service phase The Operator s Manual OM contains instructions on how to operate the protection terminal during normal service after commissioning and before periodic maintenance tests The operator s manual could be used to find out how to handle disturbances or how to view calcula...

Страница 9: ...ules such as modems optical con verters etc if included in the terminal The chapter Setting and configuring the terminal contains instructions on how to download settings and configuration to the terminal The chapter Establishing connection and verifying the SPA IEC communication contains instructions on how to enter SPA IEC settings and verifying the SPA IEC communication The chapter Verifying se...

Страница 10: ... ing protection equipment test equipment protection functions and the configured functional logics in the protection 1 4 Related documents 1 5 Revision notes Documents related to REL 551 C1 2 3 Identity number Operator s manual 1MRK 506 104 UEN Installation and commissioning manual 1MRK 506 106 UEN Technical reference manual 1MRK 506 105 UEN Application manual 1MRK 506 118 UEN Technical overview b...

Страница 11: ...ormation Chapter 2 Safety information About this chapter This chapter contains safety information Warning signs are presented which attend the user to be careful during certain operations in order to avoid human injuries or damage to equipment ...

Страница 12: ...age which is lethal to humans Warning Always use suitable isolated test pins when measuring signals in open circuitry Poten tially lethal voltages and currents are present Warning Never connect or disconnect a wire and or a connector to or from a terminal during normal operation Hazardous voltages and currents are present that may be lethal Op eration may be disrupted and terminal and measuring ci...

Страница 13: ...r s secondary winding Operating a current transformer with the secondary winding open will cause a massive potential build up that may damage the transformer and may cause injuries to humans Warning Never unmount the front or back cover from a powered terminal or from a terminal con nected to powered circuitry Potentially lethal voltages and currents are present ...

Страница 14: ...rface Electrostatic discharge ESD may cause damage to the module Caution Do not connect live wires to the terminal Internal circuitry may be damaged Caution Always use a conductive wrist strap connected to protective ground when replacing modules Electrostatic discharge ESD may damage the module and terminal circuit ry Caution Take care to avoid electrical shock if accessing wiring and connection ...

Страница 15: ...ration Be careful and check regulations before making the change Note The protection assembly is designed for a maximum continuous current of four times rated value Note Activating the setting lockout function which prevents unauthorised changes of the set tings without proper configuration may seriously affect the terminal s operation ...

Страница 16: ...10 Note signs Chapter 2 Safety information ...

Страница 17: ...11 About this chapter Chapter 3 Overview Chapter 3 Overview About this chapter This chapter introduces the user to the installation and commissioning tasks ...

Страница 18: ...stem has to be checked in order to verify that the installation was successful The installation and commissioning task starts with configuring the digital communica tion modules if included The terminal can then be configured and set which means that settings and a configuration has to be applied if the terminal does not have a factory configuration downloaded Then the operation of each included f...

Страница 19: ...13 About this chapter Chapter 4 Unpacking and checking the terminal Chapter 4 Unpacking and checking the terminal About this chapter This chapter contains instructions on how to receive the terminal ...

Страница 20: ...delivery documents after the terminal has been energised 4 Check for transport damages In case of transport damage appropriate action must be taken against the latest carrier and the nearest ABB office or representa tive should be informed ABB should be notified immediately if there are any discrepancies in relation to the delivery documents Store the terminal in the original transport casing in a...

Страница 21: ...15 About this chapter Chapter 5 Installing the terminal Chapter 5 Installing the terminal About this chapter This chapter describes how to install the terminal ...

Страница 22: ...e to rapid temperature variations powerful vibrations and shocks surge voltages of high amplitude and fast rise time strong induced magnetic fields or similar extreme conditions should be avoided Sufficient space must be available in front of and at rear of the terminal to allow access for maintenance and future modifications Flush mounted terminals should be mounted so that terminal modules can b...

Страница 23: ... section 2 1 Side by side mounting kit See section 2 2 Flush mounting kit See section 2 3 Semi flush mounting kit See section 2 3 Wall mounting kit See section 2 4 Most of the REx 5xx terminals can be rack flush semi flush or wall mounted with the use of different mounting kits An additional box of type RHGS can be mounted to one side of a 1 2 or 3 4 terminal The 1 1 of 19 inches wide terminal can...

Страница 24: ...18 Mounting the terminal Chapter 5 Installing the terminal 2 1 Mounting in a 19 inch rack Figure 1 19 inch rack mounting PosNo Description 1 and 4 Mounting angle 2 and 3 TORX T20 screws 98000037 1 2 3 4 ...

Страница 25: ... assembly in the rack 3 Fasten the mounting angles with appropriate screws 2 2 Mounting in a 19 inch rack with an additional box type RHGS Make sure a side by side mounting kit and a suitable 19 inch rack mounting kit are available before proceeding Assemble the two terminals by using a side by side mounting kit Then mount the brackets and install the assembled terminals in the rack as described i...

Страница 26: ...ounting the terminal Chapter 5 Installing the terminal Figure 2 Side by side assembly PosNo Description 1 and 3 Side by side mounting plate 2 and 4 Screws TORX T20 5 Mounting angle xx00000097 ai 2 1 3 4 5 5 ...

Страница 27: ... by side mounting plate Use the remaining four screws 5 Follow the instructions in section 2 1 to mount the mounting angles PosNo 5 and install the side by side assembly in the rack 2 3 Mounting in a flush or semi flush installation Make sure a flush or semi flush mounting kit is available before proceeding The procedure for flush and semi flush mounting is mainly the same In semi flush mounts a d...

Страница 28: ...e terminal Figure 3 Flush and semi flush mounting PosNo Description 1 Sealing strip 2 Distance frame only for semi flush 3 Sealing strip for distance frame only for semi flush 4 Side holder 5 Groove 6 Locking screw TORX T10 xx00000129 eps 1 2 3 4 5 6 ...

Страница 29: ... distance frame 2 Dispose the strip remains The remains should be source separated as soft plastic 3 Carefully press the cut strips into the front panel groove 4 Adhere the cut strips posNo 3 to the edge of the distance frame posNo 2 semi flush mounting only 5 Make a panel cut out See the Technical reference manual for cut out dimensions 6 Insert the terminal into the cut out 7 Add and lock the si...

Страница 30: ...r to maintain a good and even seal in IP 54 environments 2 4 Mounting on a wall The mounting bars are prepared for adding DIN rails or equivalent above and below the mounted terminal If used make sure all necessary parts such as rails and terminal blocks are available before starting Make sure the wall mounting kit is available Figure 4 Wall mounting PosNo Description 1 Mounting bar 2 Side plate x...

Страница 31: ...he terminal blocks on the DIN rail s It is much easier to do this without the unit in place 4 Make all electrical connections to the terminal blocks It is much easier to do this without the unit in place 5 Mount the side plates posNo 2 to the terminal 6 Mount the terminal to the mounting bars 2 4 2 Preparing a wall mounted terminal for electrical installation Procedure 1 Remove all screws from one...

Страница 32: ...ted using back side mounted screw connectors Use a solid conductor with a cross section area between 2 5 6 mm2 AWG20 10 or a stranded conductor with a cross section area between 2 5 4 mm2 3 2 Connecting the auxiliary power VT and signal connectors Auxiliary power VTs and signals are connected using COMBICON Phoenix technol ogy plug in screw connectors Procedure 1 Connect signals to the COMBICON pl...

Страница 33: ...4 Making the screen connection When using screened cables always make sure screens are grounded and connected in according to applicable engineering methods This may include checking for appropri ate grounding points near the terminal for instance in the cubicle and or near the source of measuring Ensure that ground connections are made with short max 10 cm con ductors of an adequate cross section...

Страница 34: ...ors to black or grey transmit back side connectors Fiber optical cables are sensitive to handling Do not bend too sharply The minimum curvature radius is 15 cm for plastic fibers and 25 cm for glass fibers If cable straps are used apply with loose fit Caution Always hold the connector never the cable when connecting or disconnecting optical fibres Do not twist pull or bend the fibre Invisible dama...

Страница 35: ...low For best result a cable with twisted pairs and double screens should be used one screen for each twisted pair and one surrounding all pairs Each signal shall utilizing its own twisted pair as in figure 6 The screen for each separate pairs shall be connected to in ternal screen or ground connection of equipment if available or in other case connected to earth close to the equipment at the sendi...

Страница 36: ... modules according ITU EIA interface not short range galvanic module are under the assumption that the two equipment protection terminal and communication are within the same building and that the earthing system of the building is well carried out It also presumes that the en vironment is relatively free from electromagnetic noise ...

Страница 37: ...the external circuitry About this chapter This chapter describes what to check and which checks that should be made to ensure a correct connection to the external circuitry such as auxiliary power supply CT s and VT s These checks must be made with the protection terminal de energised ...

Страница 38: ...xternal circuitry 1 Overview The user must check the installation which includes verifying that the terminal is con nected to the other parts of the protection system This is done with the terminal and all connected circuits de energised ...

Страница 39: ... Grounding check The polarity check verifies the integrity of the circuits and the phase relationship The check should be performed as close as possible to the terminal The primary injection test verifies the CT ratio and the wiring all the way through from the primary system to the terminal Injection must be performed for each phase to neu tral circuit and each phase to phase pair In each case cu...

Страница 40: ... circuitry 3 Checking the power supply Check that the value of the auxiliary supply voltage remains within the permissible range under all operating conditions Check that the polarity is correct according to the technical data on the front plate on the terminal ...

Страница 41: ...t connector from the binary input cards Check all connected signals so that both input level and polarity are in accordance with the termi nal s specifications 4 2 Binary output circuits Preferably disconnect the binary output connector from the binary output cards Check all connected signals so that both load and polarity are in accordance with the terminal s specifications ...

Страница 42: ...36 Checking the binary I O circuits Chapter 6 Checking the external circuitry ...

Страница 43: ...bout this chapter Chapter 7 Energising the terminal Chapter 7 Energising the terminal About this chapter This chapter describes the start up sequence and what to check after the terminal has been enerigsed ...

Страница 44: ...ng a whole cubicle to energising a single ter minal The user should reconfigure the terminal to activate the hardware modules in or der to enable the self supervision function detect eventual hardware errors Then the terminal time must be set The self supervision function should also be checked to ver ify that the terminal unit operates properly The user could also check the software ver sion the ...

Страница 45: ... Ready A steady green light indicates a successful startup If the upper row in the window indicates Fail instead of Ready and the green LED is flashing an internal failure in the terminal has been detected See the self supervision function in this chapter to investigate the fault After startup the appearance of the local HMI should be as shown in figure 7 Figure 7 Example of the local HMI for in t...

Страница 46: ...t type present in the connected slot Procedure 1 Browse to the Reconfigure menu The Reconfigure menu is located in the local HMI under Configuration I O modules Reconfigure 2 Select Yes and press E 3 2 Setting the terminal time This procedure describes how to set the terminal time 1 Display the set time dialog Navigate the menus to Settings Time Press the E button to enter the dialog 2 Set the dat...

Страница 47: ...sion HMI data Table 1 Output signals for the self supervision function Indicated result Reason Action InternFail OK No problem detected None InternFail Fail A failure has occurred Check the rest of the indicated results to find the fault InternWarning OK No problem detected None InternWarning Warning A warning has been issued Check the rest of the indicated results to find the fault MPM modFail OK...

Страница 48: ...ion has failed Check that the I O module has been config ured and connected to the IOP1 block If the problem persists contact your ABB representative for service RealTimeClock OK No problem detected None RealTimeClock Warning The real time clock has been reset Set the clock TimeSync OK No problem detected None TimeSync Warning No time synchroniza tion Check the synchronization source for prob lems...

Страница 49: ...uring the digital communication modules Chapter 8 Configuring the digital communication modules About this chapter This chapter contains instructions on how to configure the digital communication mod ules such as galvanic and optical modems ...

Страница 50: ...tion is between 6 and 10 dB use either High or Low setting For single mode fibres If the attenuation is higher than 5 dB use High setting If the attenuation is between 0 and 5 dB use either High or Low setting To achieve the best operation the optical communication modules at both terminals must be synchronised To fulfil this one terminal acts as a Master and the other as a Slave This is set under...

Страница 51: ...plate Figure 8 Setting and indications for short range optical modem Switch 3 and 4 are used to set the source of timing The function is according to setting of timing signal table 2 When using the modem for optical point to point transmission one modem should be set for locally created timing and the other for timing recovered from received signal When the modems are communicating with a transcei...

Страница 52: ... is inverted in one compared to the other The other jumper is S3 that has to be in bottom position as marked in figure 10 If it is in top position the communication will not work In top position the transmit clock is supposed to be created in the CPU on the MPM module which is not possible On JTAG ISP there shall be no jumpers inserted Note After any change of settings the modem has to be reset by...

Страница 53: ...t the back then remove all screws holding the back plate After the back plate has been removed the modem can be pulled out xx00000542vsd REx5xx 5km Optical fibres 21 15X 16X V 35 36 15X X 21 16X G 703 16X xx01000138 vsd 1 S3 S4 1MRK001471 BA 1MRK001471 DA JTAG ISP Note Only pull out the modem not the whole double size Euro card After the jumper settings has been changed put everything back in reve...

Страница 54: ...witch The function of the LED s are explained in table 3 Table 3 Indications LED Colour Explanation RTS Yellow Request to send CTS Yellow Clear to send DSR Yellow Data communication correct DCD Yellow Detection of carrier signal TXD Yellow Transmitted data RXD Yellow Received data RA Red Remotely detected problem with link MA Red Memory function for problem with link LO Green Link operation correc...

Страница 55: ... modem Only switch 1 and 2 are used on the DIP switch The function is according to the setting of timing signal see table 4 In normal operation switch 1 is set in ON position at one end and switch 2 is set ON at the other end The rest of the switches is set OFF Table 4 Setting of timing signal There are also some indication for supervision of the communication channel that can be seen when the cov...

Страница 56: ... Configuring the short range galvanic modem Chapter 8 Configuring the digital communication modules Table 5 Indications LED Explanation DCD Detection of carrier signal TD Transmitted data RD Received data ...

Страница 57: ... Table 6 DSUB connector explanation Designation Explanation A Designations of terminals according to CCITT EIA etc B Designations of terminals according to CCITT EIA etc DCE Data communication equipment multiplexer etc DTE Data terminal equipment protection DTE READY Data terminal ready follows auxiliary voltage GND Earth reference for signals RCLK Receiver signal timing not for V 36 1 SCREEN 2 TX...

Страница 58: ...nfiguration TerminalCom RemTermCom BitRate For X 21 and contra directional operation no settings are available For the signals used by the protection the communication module for V 36 also fulfils the older recommendation for V 35 REQ SEND Request to send follows auxiliary voltage RXD Received data SCREEN Connection of cable screen TCLK DCE Transmitter signal timing from DCE TCLK DTE Transmitter s...

Страница 59: ...ition ON the timing for transmission is created internally in the modem In position OFF the timing for transmission is recov ered from the received G 703 signal Normally position OFF shall be used when the protection is connected to a multiplexer or other communication equipment If used in back to back operation switch 1 is set in ON position at one end and in OFF position at the other end The res...

Страница 60: ...54 Configuring the interface modules for G 703 co directional Chapter 8 Configuring the digital communication modules Table 7 Indications LED Explanation TD Transmitted data RD Received data ...

Страница 61: ... describes how to set the terminal either through a PC or the local HMI and download a configuration to the terminal in order to make commissioning possible The chapter does not contain instructions on how to create a configuration or calculate settings Please consult the application manual for further information about how to cal culate settings ...

Страница 62: ... configuration tool to verify if the terminal has the expected configu ration A new configuration is performed with the CAP tool The binary outputs can be selected from a signal list where the signals are grouped under their function names It is also possible to specify a user defined name for each input and output signal All settings can be Entered manually through the local HMI Downloaded from a...

Страница 63: ...n the local HMI See the technical reference manual for a complete list of setting parameters for each func tion Some of the included functions may not be used In this case the user can set the parameter Operation to Off to disable the function Some settings can only be set through the local HMI such as the setting access and the slave and baud rate when communicating with a PC software The setting...

Страница 64: ... sub con tact This ensures a disturbance free and safe communication with the terminal When communicating from a PC the slave number and baud rate communication speed settings must be equal in the PC program and in the REx 5xx terminal Procedure 1 Plug the cable to the optical contact on the local HMI 2 Plug the other end of the cable to the COM port of the PC 3 Set the slave number and baud rate ...

Страница 65: ... slave number and baud rate communication speed settings must be equal in the PC program and in the REx 5xx terminal Using the SPA rear port The slave number and baud rate settings of the rear SPA IEC 870 5 103 port on the REx 5xx terminal for SPA bus communication is done on the local HMI at Configuration TerminalCom SPACom Rear Using IEC 870 5 103 rear port The slave number and baud rate setting...

Страница 66: ... uration tool the terminal is automatically set in configuration mode When the terminal is set in configuration mode all functions are blocked The red LED on the terminal flashes and the green LED is lit while the terminal is in the configuration mode When the configuration is downloaded and completed the terminal is automatically set into normal mode For further instructions please refer to the u...

Страница 67: ... 10 Establishing connection and verifying the SPA IEC communication About this chapter This chapter contains instructions on how to establish connection and verify that the SPA IEC communication operates as intended when the terminal is connected to a monitoring or control system via the rear SPA IEC port ...

Страница 68: ...edure 1 Set the operation of the rear SPA IEC port to SPA The operation of the rear SPA IEC port can be found on the local HMI at Configuration TerminalCom SPA IECPort Now the SPA IEC port operates as a SPA port 2 Set the slave number and baud rate for the rear SPA port The slave number and baud rate can be found on the local HMI at Configuration TerminalCom SPACom Rear Set the same slave number a...

Страница 69: ...terminal 3 Set the main function type of the terminal The main function type can be found on the local HMI at Configuration TerminalCom IECCom FunctionType The main function type can be set to values from 1 to 255 accord ing to the standard The value zero is default and corresponds to not used Examples of values that can be used are Table 8 Main function type examples If the setting OpFnType is se...

Страница 70: ...of the different functions in the terminal verify that the events and indications in the SMS SCS system are as expected 2 2 Verifying IEC communication To verify that the IEC communication with the IEC master system is working there are some different methods Choose one of the following Procedure 1 Use a protocol analyzer and record the communication be tween the terminal and the IEC master Check ...

Страница 71: ...y secondary injection Chapter 11 Verifying settings by secondary injection About this chapter This chapter describes how to verify that the protection functions operates correctly ac cording to the settings Only the tested function should be in operation ...

Страница 72: ...nt should be able to provide a three phase supply of voltages and cur rents The magnitude of voltage and current as well as the phase angle between voltage and current must be variable The voltages and currents from the test equipment must be obtained from the same source and they must have a very small harmonic contents If the test equipment cannot indicate the phase angle a separate phase angle ...

Страница 73: ...al is designed for a maximum continuous current of four times the nominal current Note Please observe the measuring accuracy of the terminal the test equipment and the an gular accuracy for both of them Note Please consider the configured logic from the function block to the output contacts when measuring the operate time ...

Страница 74: ...trieve signals and parameters names etc 2 2 Preparing the connection to the test equipment The REx 5xx terminal can be equipped with a test switch of type RTXP 24 The test switch and its associated test plug handle RTXH 24 are a part of the COMBITEST system which gives a secure and convenient testing of the terminal The test handle can be plugged into the test switch or withdrawed from the test sw...

Страница 75: ...tedly displays Busy and after that the yellow LED starts flashing which indicates that the terminal is in test mode 2 4 Connecting test equipment to the terminal Before testing connect the testing equipment according to the valid terminal diagram for each specific REx 5xx terminal Pay special attention to the correct connection of the input and output current terminals and to the connection of the...

Страница 76: ...ent and voltage at rated value 2 Compare the injected value with the measured value The phasor menu is located in the local HMI under ServiceReport Phasors Primary and Secondary Consider set ratio factors for CT s and VT s 3 Compare the frequency reading with the set frequency and the direction of the power with the injected power The frequency and active power are located in the local HMI un der ...

Страница 77: ...Before starting a new test mode session the user should scroll through every function to ensure that only the function to be tested and the interconnected ones are set to NO A function is also blocked if the BLOCK input signal on the corresponding function block is active which depends on the configuration The user should therefore ensure that the logical status of the BLOCK input signal is equal ...

Страница 78: ...rt settings The terminal must be set in testmode Operation ON to activate the disturbance report settings The user can select how the disturbances are indicated on the local HMI during the test The user can for example select if the disturbance summary should be stored scrolled on the local HMI or if LED information should be stored Scroll to the disturbance re port settings which are located in t...

Страница 79: ... HMI but not stored in the terminal Disturbance summary is scrolled automatically on the local HMI for the two latest recorded disturbances until cleared The information is not stored in the terminal On On or Off The disturbance report works as in normal mode Disturbances are stored Data can be read from the local HMI a front connected PC or SMS LED information yellow start red trip is stored The ...

Страница 80: ...ircuits and the operate value of the IMinOp current level detector by injecting current one phase at a time 2 Check the phase current blocking function for all three phas es by injecting current one phase at a time The output signals shall reset with a delay of 1 s when the current exceeds 1 5 I1b 3 Inject a current 0 90 I1b to phase L1 and a current 0 15 I1b to the reference current input I5 4 De...

Страница 81: ...ignals to logical 0 and note on the local HMI that the TEF TRIP and the TEF TRSOTF signal is not ac tivated logical 0 Values of the logical signals belonging to the time delayed residual overcurrent protection are available under menu tree ServiceReport Functions EarthFault TimeDelayEF 2 Set the polarising voltage to 2 of Ub and the phase angle be tween voltage and current to 65 the current laggin...

Страница 82: ...en voltage and current to 65 8 Check the operate current of the IMin function The function activates the TEF START output 9 When independent time delay definite is selected check the operate time of the t1 timer by injecting a current two times the set IMin operate value When inverse time delay is selected check the operate time at three points of the inverse characteristic The formulas for operat...

Страница 83: ...the phase angle of the polarising voltage to ϕ 245 and check that the directional current function and the switch onto fault logic gives no operation when the current is in the reverse direction 13 Connect the rated DC voltage to the TEF BLOCK configured binary input and switch on the fault current No TEF TRIP nor TEF START signal should appear 14 Switch off the fault current Characteristics Opera...

Страница 84: ... by secondary injection 15 Connect the rated DC voltage to the TEF BLKTR configured binary input and switch on the fault current No TEF TRIP nor TEF TRSOTF should appear But the output TEF START shall be activated 16 Continue to test another function or complete the test by set ting the test mode to off ...

Страница 85: ...orkstation It could be useful to have a printer for hard copies The behavior of the disturbance re cording function can be checked when protective functions of the terminal are tested When the terminal is set to operate in test mode there is a separate setting for operation of the disturbance report which also affects the disturbance recorder A manual trig can be started any time This results in a...

Страница 86: ...test mode from the PST The functionality of the event reporting during test mode is set from the PST as follows Use event masks Report no events Report all events In Test Mode individually event blocks can be blocked from the PST Individually event blocks can also be blocked from the local HMI under the menu Test TestMode BlockEventFunc ...

Страница 87: ...vent recorder Chapter 11 Verifying settings by secondary injection 7 Event recorder During testing the event recorder can be switched off if desired This is found in the SMS or Substation Control System SCS ...

Страница 88: ...edure 1 Inject a phase current in the terminal with start below the set ting value 2 Increase the injected current in the Ln phase until the IOC TRLn n 1 3 signal appears 3 Switch off the fault current Observe the maximum permitted overloading of the current cir cuits in the terminal 4 Compare the measured operating current with the set value 8 1 2 Residual overcurrent protection non dir Procedure...

Страница 89: ...Instantaneous overcurrent protection IOC Chapter 11 Verifying settings by secondary injection 8 2 Completing the test Continue to test another function or complete the test by setting the test mode to off ...

Страница 90: ...on the line will result in a local and REMOTE end trip When the current balance is disturbed by any action the protections at both line ends must be blocked Before performing any work in the current circuit to the line differential protection the TestMode must be activated and saved The protection will not enter into test mode without saving the command When the protection is equipped with a COMBI...

Страница 91: ...ase is returned as the L2 current L2 is returned as L3 and L3 as L1 Figure 16 Stabilisation characteristic Note When a current is injected into phase L1 in the terminal it will appear as an IDiff in phase L1 and L2 with 50 of the value as an IBias and in phase L3 with 25 of the value as an IBias When the current is sufficiently high the protection will operate in phase L1 and L2 in the terminal in...

Страница 92: ...t switch It has to be made on the station side of the test switch 2 Set the protection in test mode from the HMI unit The TestMode is found in the menu under Test TestMode Operation The TestMode command must be saved in order to be activated When the protection is equipped with COMBITEST test switch the test mode is automatically activated but not saved when the test handle is inserted 3 Prepare t...

Страница 93: ...e is to be read as IDiffL1 and IDiffL2 and 50 of IDiffL1 as IBiasL1 and IBiasL2 The IDiffL3 should be zero and IBiasL3 25 of IDiffL1 These values are read on the HMI under Service Report Functions Differential Diff Values 7 Repeat step 6 for phase L2 and L3 The result shall be transposed one respectively two steps 8 Inject a symmetrical three phase current and increase the current until operation ...

Страница 94: ...lower than 10 of the actual secondary current divided by the CTFactor the IBias should be equal to this current This measurement is necessary at commissioning to guarantee that there is no phase shift between the terminals 15 Remove the external blocking of the trip signal when this test has been successfully performed 16 A complete commissioning or maintenance test requires that the test is repea...

Страница 95: ...fferential and bias currents pre sented on the terminal They must correspond to the following values Equation 8 Equation 9 6 With the terminal in normal operation not in Test mode and with the line energised the IDiffL1 IDiffL2 and IDiffL3 are mea sured under the service report menu with CCComp temporary set to Off at both terminals Thereafter measure the values with the CCComp set to On Note Sett...

Страница 96: ...n by comparing the measured IDiffLx values The measured IDiffLx shall be near zero in each separate phase with the CCC used 8 Remove the external blocking of the trip signal when this test has been successfully performed 9 3 Completing the test Continue to test another function or complete the test by setting the test mode to off ...

Страница 97: ...magnitude of input measured quantities within the limits of de clared accuracy The mean service values are available under the submenu Service Report ServiceValues The phasors of up to five input currents and voltages are available under the submenu Service Report Phasors Primary 2 Check the operation of ADBS or IDBS when applicable Com pare with the expected values The operation of ADBS or IDBS f...

Страница 98: ... the need to block output signals 2 Check that the values presented on the HMI module corre sponds to the magnitude of input direct current within the lim its of declared accuracy The service value is available under the submenu Service Report I O Slotnm MIMx MIxy Value 3 Check the operation of ADBS or IDBS function when applica ble Compare with the expected values The operation of ADBS or IDBS fu...

Страница 99: ...of input current and observing the operation of the cor responding output relays The output contact changes its state when the changes in the input measuring quantity are higher than the set values RMAXAL HI WARN HIALARM or lower than the set values LOWWARN LOWALARM RMINAL 5 Continue to test another function or complete the test by set ting the test mode to off ...

Страница 100: ...c tions Reading of the values must be possible The terminal must not respond to any attempt to change the setting value or configuration 5 Disconnect the control DC voltage from the selected binary input 6 Repeat the attempt under step 4 The terminal must accept the changed setting value or configura tion 7 Depending on the requested design for a complete REx 5xx terminal leave the function active...

Страница 101: ...t the active setting group The ActiveGroup menu is located in the local HMI under ServiceReport ActiveGroup 3 Connect the appropriate dc voltage to the corresponding bi nary input of the terminal and observe the information pre sented on the HMI display The displayed information must always correspond to the activat ed input 4 Check that corresponding output indicates the active group 5 Continue t...

Страница 102: ...ing the protection without external temperature compensation NonComp Procedure 1 Quickly set the measured current fault current in one phase to about 300 of I1b to minimise the trip time and switch off the current with the switch 2 Reset the thermal memory under menu tree Test ThermReset 3 Switch on the fault current and read the presented tempera ture ServiceReport Functions ThermOverload ThermOv...

Страница 103: ... binary input 10 Check the reset limit TdReset Measure the signal THOL START until it disappears on the corre sponding binary output or on the local HMI unit take the T Line readings and compare with the setting of TdReset 11 Compare the measured trip time with the setting according to the formula 12 Reset the thermal memory 13 Continue to test another function or complete the test by set ting the...

Страница 104: ...low the set ting value 2 Increase the injected current measured current in the Ln phase until the starting signal TOC STLn n 1 3 appears 3 Switch off the fault current Observe the maximum permitted overloading of the current cir cuits in the terminal 4 Compare the measured operating current with the set value IP 5 Set the fault current to about 1 5 times the measured operat ing current 6 Switch on...

Страница 105: ...al 4 Compare the measured operating current with the set value IN 5 Set the fault current to about 1 5 times the measured operat ing current 6 Switch on the fault current and measure the operating time of the TOC protection Use the TOC TRN signal 7 Compare the measured time with the set value tN 15 2 Completing the test Continue to test another function or complete the test by setting the test mod...

Страница 106: ...P TRL2 TRIP TRL3 and TRIP TR3P 16 2 1ph 3ph operating mode The following tests should be carried out in addition to some other tests which depends on the complete configuration of a terminal Procedure 1 Initiate one by one different single phase to earth faults Consider sufficient time interval between the faults to overcome a reclaim time of eventually activated autoreclosing function Only a sing...

Страница 107: ...ncluded in protection scheme Check that the second trip is a three phase trip 16 3 1ph 2ph 3ph operating mode The following tests should be carried out in addition to some other tests which depends on the complete configuration of a terminal Procedure 1 Initiate one by one different single phase to earth faults Consider sufficient time interval between the faults to overcome a reclaim time of even...

Страница 108: ...RIP TRIP TRIP TR1P and the corresponding phase signal TRIP TRLn should be active at each fault 5 Initiate a single phase to earth fault and switch it off immedi ately when the trip signal is issued for the corresponding phase Initiate the second single phase to earth fault in one of the remaining phases within the time interval shorter than two seconds and shorter than the dead time of the autore ...

Страница 109: ...2 Verifying the internal configuration About this chapter The aim of this chapter is to verify that the internal communications and output signals are according to the specification and normal protection praxis This means that all in cluded protection functions must be in operation ...

Страница 110: ...ices that are involved in the fault clearance process must have been tested as individuals and set in operation The breaker must be ready for an open close open cycle The shaping of the test process is dependent on the complexity of the design of the switchyard Hereby follows some items which could be used as guidelines ...

Страница 111: ...re 1 Make sure that the protection terminal and fitting breaker s to be tested are in service 2 Connect the test equipment to the terminal 3 Set the test equipment so that the impedance present to the relay is half the set value 4 Energise the protection terminal and evaluate the result i e Check that correct trip has been accomplished according to con figuration and philosophy Check that all bina...

Страница 112: ...106 Testing the interaction of the distance protection Chapter 12 Verifying the internal configuration ...

Страница 113: ...ter Chapter 13 Testing the protection system Chapter 13 Testing the protection system About this chapter This chapter describes how to verify the conformity of the protection system without the protected object energised ...

Страница 114: ...final test that should be carried out before the protected object is taken into service Due to the complexity in combination with already performed tests it is not necessary to test all protection functions and all fault types in this process The most important protection functions in the terminal for single line to earth fault and phase phase fault could be choose for the test The shaping of the ...

Страница 115: ...sequence 5 Simulate the condition for the synchro check as for live bus and dead line 6 Energise the protection terminal and evaluate the result i e Check that correct trip has been accomplished according to con figuration and philosophy Check that the autoreclosure have made an reclosing of the pro tected object Check that activation of all other external devices have been ac complished according...

Страница 116: ... interaction of the distance protection Chapter 13 Testing the protection system It is recommended to repeat the procedure 1 6 for a protection function which detects earth faults i e residual overcurrent protec tion ...

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