Sel411l line differential relay testing procedure

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Information about Sel411l line differential relay testing procedure
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Published on October 21, 2016

Author: davidroy39

Source: slideshare.net

1. SEL411 LINE DIFFERENTIAL RELAY TESTING PROCEDURE GENERAL INFORMATION: Bay No. BAY NO.xx Bay Name xxxx Relay designation F21 Model No. 0411L1X6X1C7DCXH6247424 Make SEL S. No. 1140020060 Rated Current 1A Rated Voltage 67V L-N AC Frequency 50/60 HZ FID (Firmware ID) 411L-1-R111-V0-Z006002- D20131021 Logic inputs 125VDC Aux. Voltage 125/250V AC/DC Comm. Interface CH-X IEEEC37.94, 1350nm Fiber Comm. Interface CH-Y IEEEC37.94, 850nm Fiber GENERAL CHECKS: Sl.no General checks Status 1. Inspect for no physical damage. OK 2. Verify the wiring connection as per approved drawing. OK 3. Relay case connected to a local earth bar. OK 4. Power up the relay circuit and check relay is healthy. OK 5. Set the relay internal clock. OK 6. Send the relay setting configuration file to relay through Port F. OK WATCHDOG RELAY CHECK: Check status of watchdog contacts as below. OUTPUT Contact Status Remarks Relay De- energized Relay Energized ALARM B30—B31 Closed Open OK RELAY DC BURDEN CHECK: Relay Status V Aux Applied(V) I Measured (mA) Expected Watts Calculated Watts Enabled 135.2 130 <25W 17.59 Enabled & Trip 135.2 143 <25W 19.28 CONTROL INPUT CHECK: This is to verify the healthiness of the DC control inputs. Apply a rated voltage at each input and verify the status of the input at Front panel or 5030 HMI. Note: - Open 5030 HMI view after the relay is connected to PC. - Open “Device Overview” page and observe the Inputs status. - These inputs are assigned according to site requirements.

2. Control input No. Configuration Result IN201 CB CLOSE OK IN202 CB READY OK IN203 CB MANUAL CLOSE OK IN204 LINE VT MCB TRIP OK IN205 AR-2 IN OK IN206 AR-2 OUT OK IN207 RTR IT SEND OK IN208 AR BLOCK OK IN301 AR START OK IN302 AR BLOCK OK IN303 CBF INITIATION OK IN304 RELAY RESET OK IN305 SPARE OK IN306 SPARE OK IN307 SPARE OK IN308 SPARE OK IN401 SPARE OK IN402 SPARE OK IN403 SPARE OK IN404 SPARE OK IN405 SPARE OK IN406 SPARE OK IN407 SPARE OK IN408 SPARE OK CONTROL OUTPUT RELAY CHECK: This is to verify the healthiness of the Control output relay healthiness. Operate each output through front panel or 5030 HMI, then check continuity of the contact that closes. - For PULSE the relay outputs, “Breaker” jumper “JMP6-B” shall be put in ON position. The jumper “JMP6-B” is available in main board, which is on the top. Open the relay front cover, and change the jumper to ON position on main board, as mentioned in instruction manual section2, page 2.26. - Open 5030 HMI view after the relay is connected to PC. - Open “Control Window” page and select the OUTPUT that you want to PULSE and select the duration of the PULSE. - Execute the PULSE command. Verify the physical contact close of the corresponding output. Output Relay No. Configuration Result OUT201 AR SUCCESS OK OUT202 COMM. FAIL CH.1& CH.2 OK OUT203 SPARE OK OUT204 FPSM OPTD OK OUT205 SPARE OK OUT206 CBF TRIP FROM FPSM OK OUT207 AR LOCK-OUT OK OUT208 IT 1 FAST RX OK OUT209 IT 2 DELAY RX OK OUT210 FPSM TRIP OK OUT211 DIST. BLOCK REC. OK OUT212 DIST. START OK OUT213 DEF START OK

3. OUT214 DEF BLK REC OK OUT215 FPSM PROTECTION FAULTY OK OUT301 FPSM FAST + DELAY TRIP OK OUT302 FPSM FAST TRIP OK OUT303 FPSM DELAY TRIP OK OUT304 CBF TRIP FROM FPSM OK OUT305 SPARE OK OUT306 IT-1 & IT-2 RX OK OUT307 VT FAIL ALARM OK OUT308 SPARE OK OUT309 FPSM ANY TRIP OK OUT310 FPSM FAST TRIP OK OUT311 FPSM DELAY TRIP OK OUT312 AR CLOSE COMAND OK OUT313 SPARE OK OUT314 CLOSE BLOCK OK OUT315 SPARE OK OUT401 SPARE OK OUT402 SPARE OK OUT403 SPARE OK OUT404 SPARE OK OUT405 SPARE OK OUT406 SPARE OK OUT407 SPARE OK OUT408 SPARE OK OUT409 SPARE OK OUT410 SPARE OK OUT411 SPARE OK OUT412 SPARE OK OUT413 SPARE OK OUT414 SPARE OK OUT415 SPARE OK SINGLE END INJECTION (LOCAL): The complete 87L relaying scheme requires pair of two relays one at each end for testing. The following tests in this section “SINGLE END INJECTION” are conducted with relay 87L channels and are put in LOOPBACK Mode. These tests prove the relay healthiness, setting sensitivity, input and output configuration. However the complete relaying scheme shall be tested and recorded under section “END-TO- END” test. Note: - 87L function test requires, both local relay and remote relay connected with 87L communication interface and both are powered up. Also it requires current injection at local and remote end with time synchronized test operation. - Single end current injection allows us to test only 87L sensitivity test. So, the sensitivity test is only performed and that is sufficient to verify the 87L setting.

4. CT/VT INPUT CHECK: Note: This test is intended to verify the CT/VT inputs, measurement and CTR, VTR setting in the local relay. Step1: Apply rated voltage and current to the relay CT/VT inputs. Step2: Measure the current/voltage at relay HMI or from 5030HMI. Note: - Open 5030 HMI view after connecting to the relay. - Click “Local Instantaneous metering” view and save the snapshot in to annexure word document. - Click “phasor” view and save the snapshot in to annexure word document. Voltage Applied: 3PH, 115V AC Current applied: 3PH, 1.0A PTR: 132KV/115kV CTR: 1200/1A CURRENT MEASUREMENT: Local PHASE A MAG/ ANG PHASE B MAG/ ANG PHASE C MAG/ ANG 3I0 MAG/ ANG 3I2 MAG/ ANG I1 MAG/ ANG Expected 1200A <0 1200A <-120 1200A <120 0 0 1200A <0 Actual 1200<0.5 1202<-119.9 1203<119.8 0 0 1201<0 Accuracy: +/- 1% for phase currents (0.1 – 20A) +/-3% for sequence currents, refer instruction manual page 1.10 VOLTAGE MEASUREMENT: Local PHASE AN MAG/ ANG PHASE BN MAG/ ANG PHASE CN MAG/ ANG Expected 76.2KV <0 76.2 KV <-120 76.2 KV <120 Actual 76.2<0.6 76.2<-121 76.3<120 Accuracy: +/- 2% (33.5V -150V) refer instruction manual page 1.10 POWER MEASUREMENT: Current phase angle = -45deg Local MW MVAR PF Expected 193.5 193.5 0.71 Actual 193.77 194 0.71 MEASUREMENT OF CURRENT: Current applied: 3PH, 1A PTR: 132KV/115kV CTR: 1200/1A

5. CURRENT MEASUREMENT WITH ONLY CH X: PHASE A MAG/ ANG PHASE B MAG/ ANG PHASE C MAG/ ANG 3I0 MAG/ ANG 3I2 MAG/ ANG I1 MAG/ ANG LOCAL 0.997<0 0.999<-121 0.999<120 0 0 1200 CHANNEL X NA NA NA NA NA NA CHANNEL Y NA NA NA NA NA NA Vector Sum (differential) 0.998<0 0.999<-120 0.999<120 0 0 0.999 Alpha 1<180 1<180 1<180 ----- ------ ----- ALPHA VALUE: Alpha is complex ratio between Remote current (IR) and local current (IL). It is represented with magnitude and angle. Current applied: 3PH, 1A PTR: 132KV/115kV CTR: 1200/1A CURRENT MEASUREMENT WITH ONLY CH Y: PHASE A MAG/ ANG PHASE B MAG/ ANG PHASE C MAG/ ANG 3I0 MAG/ ANG 3I2 MAG/ ANG I1 MAG/ ANG LOCAL 0.997<0 0.999<-121 0.999<120 0 0 1200 CHANNEL X NA NA NA NA NA NA CHANNEL Y NA NA NA NA NA NA Vector Sum (differential) 0.998<0 0.999<-120 0.999<120 0 0 0.999 Alpha 1<180 1<180 1<180 ----- ------ ----- Note: - Open 5030 HMI view after connecting to the relay. - Click “Differential Metering” view and save the snapshot in to annexure word document. 87L DIFFERENTIAL PROTECTION: OPERATING PRINCIPLE: The 87L protection function outputs trip when the following conditions (A & B) are met. A. The differential current (vector sum magnitude) is greater than minimum threshold (87LPP/ 87L2P/87LGP). B. The Alpha value is not in the Restraining Region on the alpha plane (OR) the Restraining criterion is disabled. Note: The Restraining criterion is disabled until the relay finds more than 5%Inom both remote and local current. SENSITIVITY AND TIMING TEST: ( ONLY WITH CH-X) Note: - The sensitivity and timing tests are conducted with relay to relay. - In LOOP BACK test the local current is routed as remote current. So, the relay would see differential current twice the injected local current and the Alpha Value would be always 1<0deg , which is ideal operating point in operating region of Alpha plane. So, the expected pickup current is 50% of the 87LPP/ 87L2P / 87LGP.

6. SENSITIVITY TEST: Step1: Set ‘EOCTL’ =N, EDD=N, to avoid blocking of 87L2,87LG and blocking due to slow change in current. Step2: Set 87L2P=OFF and 87LGP =OFF, while testing 87LP, Do the same while testing others. Step3: Increase current on one phase until relay trips on 87. Repeat the same for other phases. Step4: The appropriate Relay Word Bit shall be monitored on front panel or 5030 HMI. PHASE CURRENT DIFFFERENTIAL: (CH-X) 87LPP Expected pick up 87LPP Phase A Phase B Phase C P/U (A) HMI display Idiff = IAT (secA) D/O (A) P/U (A) HMI display Idiff = IBT (sec A) D/O (A) P/U (A) HMI display Idiff = ICT (sec A) D/O (A) 0.3 0.3 0.308 0.306 0.297 0.307 0.303 0.296 0.307 0.305 0.296 Pick up Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page:1.9 NEGATIVE/ ZERO SEQ CURRENT DIFFERENTIAL: (CH-X) 87L2P/ 87LGP Expected pick up 87L2P or 87LGP 87L2 –Negative seq diff 87LG- zero seq diff P/U (A) HMI display Idiff= 3I2T (pri A) D/O (A) P/U (A) HMI display Idiff= 3I0T (Pri A) D/O (A) 0.3/0.25 0.3/0.25 0.303 0.302 0.296 0.261 0.260 0.245 Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page: 1.9 Note: For 87L2 /87LG sensitivity a single phase current shall be injected. In this case the negative sequence (I2) or zero sequence (I0) current is equal to 1/3* Iph. But the relay compares 3 x I2_injected and 3 x I0_injected with the 87L2P / 87LGP thresholds. TIMING TEST: (CH-X) SETTING: 87LPP: A 87L2P: A 87LGP: A - Apply a pre-fault load current for 1sec. - Apply 2times and 5times the setting current and measure the operating time. Use OUT201 which is fast hybrid contact used for trip relay operation. Phase Operating time Expected operating time 87LP phase current diff 87L2 – Neg seq current diff 87LG – zero seq current diff 2x setting 5x setting 2x setting 5x setting 2x setting 5x setting A 19.5 11.4 22.2 14.3 22.7 13.5 87LP:<1cyc @5x setting AND 87L2/ 87LG: <3cyc @5xsetting With back-to- back relay connection B 19.8 11.3 22.4 13.2 23.1 12.4 C 20.3 11.7 21.5 11.4 21.4 12.5

7. SENSITIVITY AND TIMING TEST: ( ONLY WITH CH-Y) SENSITIVITY TEST: Step1: Set ‘EOCTL’ =N, EDD=N, to avoid blocking of 87L2,87LG and blocking due to slow change in current. Step2: Set 87L2P=OFF and 87LGP =OFF, while testing 87LP, Do the same while testing others. Step3: Increase current on one phase until relay trips on 87. Repeat the same for other phases. Step4: The appropriate Relay Word Bit shall be monitored on front panel or 5030 HMI. PHASE CURRENT DIFFFERENTIAL: (CH-Y) 87LPP Expecte d pick up 87LPP Phase A Phase B Phase C P/U (A) HMI display Idiff = IAT (Pri A) D/O (A) P/U (A) HMI display Idiff = IBT (Pri A) D/O (A) P/U (A) HMI display Idiff = ICT (Pri A) D/O (A) 0.3 0.3 0.302 0.301 0.296 0.302 0.302 0.297 0.303 0.302 0.296 Pick up Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page:1.9 NEGATIVE/ ZERO SEQ CURRENT DIFFERENTIAL: (CH-Y) 87L2P/ 87LGP Expected pick up 87L2P or 87LGP 87L2 –Negative seq diff 87LG- zero seq diff P/U (A) HMI display Idiff= 3I2T (pri A) D/O (A) P/U (A) HMI display Idiff= 3I0T (Pri A) D/O (A) 0.3/0.25 0.3/0.25 0.302 0.302 0.297 0.259 0.258 0.249 Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page: 1.9 Note: For 87L2 /87LG sensitivity a single phase current shall be injected. In this case the negative sequence (I2) or zero sequence (I0) current is equal to 1/3* Iph. But the relay compares 3 x I2_injected and 3 x I0_injected with the 87L2P / 87LGP thresholds. TIMING TEST: (CH-Y) SETTING: 87LPP: A 87L2P: A 87LGP: A - Apply a pre-fault load current for 1sec. - Apply 2times and 5times the setting diff current and measure the operating time. Use OUT201 which is fast hybrid contact used for trip relay operation. Phase Operating time Expected operating time 87LP phase current diff 87L2 – Neg seq current diff 87LG – zero seq current diff 2x setting 5x setting 2x setting 5x setting 2x setting 5x setting A 21.3 15.7 25.1 14.3 21.5 14.1 87LP:<1cyc @5x setting AND 87L2/ 87LG: <3cyc @5xsetting With back-to- back relay connection B 23.4 16.4 25.6 14.5 21.5 13.5 C 21.5 16.3 24.5 13.4 22.7 13.2

8. Note: Pre-fault current is to reset the 3PO (three pole open) condition. Otherwise the trip time is delayed by 1cycle for 3cycles from 3PO resets. The 3PO reset current setting is 50LP =0.05A. DIFFERENTIAL RESTRAINT CHARACTERISTIC TEST: The restraint characteristic is represented in Alpha plane. This alpha plane test is not possible with one relay. So, in order to test the alpha plane, it is recommended to connect one more relay as remote relay if it is possible. The following tests shall be conducted with one more relay connected to the relay under test. I.3.1. MEASUREMENT OF CURRENT: Single end injection shall be done after the relays being connected together. Current shall be injected from one end at a time and differential metering reading shall be noted. Current applied: 3PH, 0.2A PTR: 132KV/115kV CTR: 1200/1A CURRENT MEASUREMENT WHEN INJECTION FROM LOCAL: PHASE A MAG/ ANG PHASE B MAG/ ANG PHASE C MAG/ ANG 3I0 MAG/ ANG 3I2 MAG/ ANG I1 MAG/ ANG LOCAL 0.198<0 0.198<-120 0.2<119.9 0<0 0<0 0.599<0 CHANNEL X NA NA NA NA NA NA CHANNEL Y NA NA NA NA NA NA Vector Sum (differential) 0.199<0 0.199<-120 0.2<120 0<0 0<0 0.199 Alpha 1<180 1<180 1<180 CURRENT MEASUREMENT WHEN INJECTION FROM REMOTE: PHASE A MAG/ ANG PHASE B MAG/ ANG PHASE C MAG/ ANG 3I0 MAG/ ANG 3I2 MAG/ ANG I1 MAG/ ANG LOCAL NA NA NA NA NA NA CHANNEL X 0.198<0 0.199<-120 0.199<120 0 0 0.596 CHANNEL Y 0.198<0 0.199<-120 0.199<120 0 0 0.596 Vector Sum (differential) 0.198<0 0.199<-120 0.199<120 0 0 0.596 Alpha 1<180 1<180 1<180 SENSITIVITY TEST (LOCAL INJECTION): SENSITIVITY TEST: Step1: Set ‘EOCTL’ =N, EDD=N, to avoid blocking of 87L2,87LG and blocking due to slow change in current. Step2: Set 87L2P=OFF and 87LGP =OFF, while testing 87LP, Do the same while testing others. Step3: Increase current on one phase until relay trips on 87. Repeat the same for other phases. Step4: The appropriate Relay Word Bit shall be monitored on front panel or 5030 HMI.

9. PHASE CURRENT DIFFFERENTIAL: 87LPP Expecte d pick up 87LPP Phase A Phase B Phase C P/U (A) HMI display Idiff = IAT (Pri A) D/O (A) P/U (A) HMI display Idiff = IBT (Pri A) D/O (A) P/U (A) HMI display Idiff = ICT (Pri A) D/O (A) 0.3 0.3 0.302 0.302 0.297 0.305 0.305 0.298 0.306 0.306 0.298 Pick up Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page:1.9 NEGATIVE/ ZERO SEQ CURRENT DIFFERENTIAL: 87L2P/ 87LGP Expected pick up 87L2P or 87LGP 87L2 –Negative seq diff 87LG- zero seq diff P/U (A) HMI display Idiff= 3I2T (pri A) D/O (A) P/U (A) HMI display Idiff= 3I0T (Pri A) D/O (A) 0.3/0.25 0.3 0.305 0.305 0.296 0.260 0.259 0.248 Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page: 1.9 Note: For 87L2 /87LG sensitivity a single phase current shall be injected. In this case the negative sequence (I2) or zero sequence (I0) current is equal to 1/3* Iph. But the relay compares 3 x I2_injected and 3 x I0_injected with the 87L2P / 87LGP thresholds. SENSITIVITY TEST: Step1: Set ‘EOCTL’ =N, EDD=N, to avoid blocking of 87L2,87LG and blocking due to slow change in current. Step2: Set 87L2P=OFF and 87LGP =OFF, while testing 87LP, Do the same while testing others. Step3: Increase current on one phase until relay trips on 87. Repeat the same for other phases. Step4: The appropriate Relay Word Bit shall be monitored on front panel or 5030 HMI. PHASE CURRENT DIFFFERENTIAL: 87LPP Expecte d pick up 87LPP Phase A Phase B Phase C P/U (A) HMI display Idiff = IAT (Pri A) D/O (A) P/U (A) HMI display Idiff = IBT (Pri A) D/O (A) P/U (A) HMI display Idiff = ICT (Pri A) D/O (A) 0.3 0.3 0.302 0.302 0.297 0.305 0.305 0.298 0.306 0.306 0.298 Pick up Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page:1.9 NEGATIVE/ ZERO SEQ CURRENT DIFFERENTIAL: 87L2P/ 87LGP Expected pick up 87L2P or 87LGP 87L2 –Negative seq diff 87LG- zero seq diff P/U (A) HMI display Idiff= 3I2T (pri A) D/O (A) P/U (A) HMI display Idiff= 3I0T (Pri A) D/O (A) 0.3/0.25 0.3 0.305 0.305 0.296 0.260 0.259 0.248 Accuracy: +/- 3%+/-0.01xINOM, refer Instruction manual page: 1.9

10. Note: For 87L2 /87LG sensitivity a single phase current shall be injected. In this case the negative sequence (I2) or zero sequence (I0) current is equal to 1/3* Iph. But the relay compares 3 x I2_injected and 3 x I0_injected with the 87L2P / 87LGP thresholds. ALPHA PLANE RESTRAIN TEST: Note: This test requires simultaneous current inject from time synchronized test kits, if the injection shall be performed at different location of local and remote relay. ALPHA ANGLE TEST: SETTING: 87LPP: 1.0A 87L2P: 0.1A 87LGP: 0.1A 87LR:6 87LANG:195 DEG - Enable 87LPP and disable 87L2P and 87LGP for testing 87LP. - Apply Phase A, local current and remote current as IR= 1A<0deg, IL=1A<0deg. With this current the relay would be operate region. - Vary the phase angle of IR and note down relay operate region and restrain region. - The same shall be done for other phases. Diff. element IL angle (fixed) IR angle at Relay operates IR angle at Relay resets 87LA 0 279.5-81.5 82.3-280.3 87LB 240 160-328.2 322-159.9 87LC 120 40-200 202.9-39.8 87L2 0 281-80 82.1-278 87LG 0 281.5-82 82.6-278.5 Expected Restraining angle: Alpha angle = 180deg to 180-(87LANG/2) Setting 87LANG=195deg, Restraining angle = 180 to 82.5 deg, Operating angle = 82.5deg to 0deg Accuracy: +/- 3deg as per instruction manual page 1.9. ALPHA RADIUS TEST: SETTING: 87LPP: 1.0A 87L2P: 0.1A 87LGP: 0.1A 87LR:6 87LANG:195 DEG - Apply local and remote current out of phase and equal magnitude. - Increase the remote current magnitude by fixing local current until the relay trip to find the outer radius - Increase the local current magnitude by fixing remote current until the relay trip to find the outer radius.

11. ALPHA RADIUS MEASURED AT ALPHA ANGLE =180deg. Diff. element OUTER RADIUS OPERATION INNER RADIUS OPERATION IL (fixed) IR at restraint reset Radius(IR/IL) IR (fixed) IL at restraint reset Radius(IR/IL) 87LA 1 6.002 6.002 1 6.001 6.001 1 6.003 6.003 1 6.002 6.002 87LB 1 6.001 6.001 1 6.000 6.000 1 6.000 6.000 1 6.002 6.002 87LC 1 6.000 6.000 1 6.001 6.001 1 6.002 6.002 1 6.002 6.002 87L2 1 6.001 6.001 1 6.003 6.003 1 6.002 6.002 1 6.002 6.002 87LG 1 6.001 6.001 1 6.003 6.003 1 6.002 6.002 1 6.002 6.002 Expected inner radius: 0.1666 Expected outer radius: 6.0 Accuracy: +/-5% setting as per instruction manual page 1.9.

12. ALPHA RADIUS MEASURED AT DIFFERENT ALPHA ANGLE: Diff. element OUTER RADIUS OPERATION INNER RADIUS OPERATION IL (fixed) IR at restraint reset Radius(IR/IL) IR (fixed) IL at restraint reset Radius(IR/IL) 87LA 1 6.001 6.001 1 6.002 6.002 1 6.003 6.003 1 6.002 6.002 87LB 1 6.002 6.002 1 6.000 6.000 1 6.000 6.000 1 6.002 6.002 87LC 1 6.001 6.001 1 6.001 6.001 1 6.002 6.002 1 6.001 6.001 87L2 1 6.001 6.001 1 6.003 6.003 1 6.002 6.002 1 6.001 6.001 87LG 1 6.003 6.003 1 6.003 6.003 1 6.002 6.002 1 6.002 6.002 Expected inner radius: 0.1666 Expected outer radius: 6.0 Accuracy: +/-5% setting as per instruction manual page 1.9. Distance Function (21): - The SEL-311L has four independent zones of mho phase distance protection. All zones are independently set. Zones 1 and 2 are fixed to operate in the forward direction only. Zones 3 and 4 can be set to operate in either the forward or reverse direction. The phase distance elements use positive sequence voltage polarization for security and to create an expanded mho characteristic. The phase distance elements operate on phase-to-phase, phase to phase to ground, and three-phase faults. Note: For more details refer Instruction manual page: 4.0 - The SEL-311L has four independent zones of mho and quadrilateral ground distance protection. All zones are independently set. Zones 1 and 2 are forward direction only, and Zones 3 and 4 can be set in either a forward or reverse direction. - Note: For more details refer Instruction manual page: 4.11 Figure 1: Phase/Ground Distance Elements (Mho characteristics)

13. Figure 2: Ground Distance Elemenst (Quad Characteristic) QUADRILATERAL GROUND DISTANCE ELEMENTS Quad ground elements have the characteristic shown in Figure 3 when plotted on the R-X (Impedance) plane. As seen, both the left and right limits of the operate region tilt at the same angle as the positive-sequence line impedance angle, Z1ANG. A common misconception is that the reach of the relay needs to be multiplied by the sine of the line angle when testing the element at that angle. In actuality, the reach of the quad element is exactly the same as the mho element, extending along Z1ANG as shown in Figure 3. Z1ANG is also known as Maximum Torque Angle (MTA). Figure 3: Quad Ground Element Characteristic PH-E (G): - Resistive reach: Rn (Ω/Loop) = RGn (Ω) - Reactive reach: Xn (Ω/Loop) = Zn (Ω) * sin (ΦLG)* (1+Kz) - Compensation factor K0 = 1/3((Zo-Z1)/Z1). DISTANCE FUNCTION CHECK: Note: DEF unit disabled for testing of distance unit. 1) Phase-to-Phase Current Fault Detectors (Zones 1–4) : From setting file extract the Setting for Phase-to-Phase Current Fault Detectors (50PP1, 50PP2, 50PP3, 50PP4). Normally the setting of the detectors are the same and as small as possible to detect the faults.

14. (50PP1, 50PP2, 50PP3, 50PP4). setting Phase Pick up (A) Using AcSELerator QuickSet software /HMI/Device Overview check the Indications (Z1P,Z2P,Z3P and Z4P) 0.1 A R-Y 0.1 Z1P Y-B 0.102 Z2P B-R 0.103 Z3P RYB 0.103 Z4P Accuracy is ±0.01 A and ±3% of setting (1 A nominal), refer to 311L manual page 4.7 Where (Z1P, Z2P, Z3P and Z4P) are the pickup phase elements for the zones (Z1, Z2, Z3, Z4) respectively. Note: Z1, Z2 are always forward direction. Z3 and Z4 are settable forward or reverse (The default setting: Z3 is reverse and Z4 is forward). - For Ph-Ph detectors , the Pick up value will be half of the setting ph-ph current detectors. Test procedure: Voltage of faulty phase is zero but for healthy phases is normal. Inject Ph -Ph fault current with angle 180 degree. Increase for faulty phases until P/U. To show the required above targets refer to index (A) at the end of the test procedure. Z1PT 2) Phase-to-Ground Current Fault Detectors (Zones 1–4) : From setting file extract the Setting for Phase-to-Ground Current Fault Detectors (50L1, 50L2, 50L3 & 50L4) and (50GZ1, 50GZ2, 50ZG3 & 50GZ4). Where: (50L1, 50L2, 50L3 & 50L4) are the pickup phase elements for the zones ( Z1,Z2,Z3,Z4) respectively for the ground Mho characteristic. and (50GZ1, 50GZ2, 50ZG3 & 50GZ4) are the pickup phase elements for the zones ( Z1,Z2,Z3,Z4) respectively for the ground Quadrilateral characteristic. Normally the setting of the detectors are the same and as small as possible to detect the faults. (50L1, 50L2, 50L3 & 50L4) and (50GZ1, 50GZ2, 50ZG3 & 50GZ4). Setting Phase Pick up (A) Using AcSELerator QuickSet software /HMI/Device Overview check the Indications (Z1G,Z2G,Z3G and Z4G) 0.1A R-N 0.102 Z1G Y-N 0.101 Z2G B-N 0.103 Z3G Accuracy is ±0.01 A and ±3% of setting (1 A nominal) , refer to 311L manual page 4.11

15. Where (Z1G, Z2G, Z3G and Z4G) are the pickup phase elements for the zones (Z1, Z2, Z3, Z4) respectively for the mho and/or quad. Distance elements. IMPEDANCE REACHES CHECK: To get a proper reach test results for ground fault quadrilateral elements, Prefer to use constant source impedance model (to be able to simulate the actual system change for the magnitude and the angle of both of the voltages and the currents to reach the required impedance point) Item Description Checked 1 Print out from Test Kit attached Ok Impedance tolerance: +/- 5% ,refer Instruction manual page: 1.10 Ph-Ph faults & 3-phase faults the characteristic is Mho: Z calculated = Z setting. PH-E (G) Quadrilateral Characteristic: - Resistive reach: Rn (Ω/Loop) = RGn (Ω)/ (1+Kz). - Reactive reach: Xn (Ω/Loop) = Zn (Ω) * sin (ΦLG) - Compensation factor K0 = 1/3((Zo-Z1)/Z1). OPERATING TIME TESTING: Item Description Checked 1 Print out from Test Kit attached Ok Timer Accuracy is ±0.25 cycle and ±0.1% of setting, refer to Instruction manual page: 4.20 DIRECTIONAL TEST: Note: The directionality test in SEL-311L relays is not using the traditional directional positive sequence polarized voltage algorithm. SEL-311L depends on the negative sequence impedance (Z2) to determine the directionality (forward or reverse). Based on that the directionality is changing dynamically based on the negative sequence voltage (V2) and negative sequence current (I2). So, The test of the directional line is not required because it is not easy to be done by the secondary test kits , you can test one point as per the steps down. Checking the Negative-Sequence Directional Element (32Q): The SEL-311L calculates the negative-sequence impedance Z2c from the magnitudes and angles of the negative- sequence voltage and current. (the ‘c’ in Z2c indicates “calculated”).

16. where: V2 = the negative-sequence voltage I2 = the negative-sequence current Z1ANG = the positive-sequence line impedance angle Re = the real part of the term in brackets, for example,(Re[A + jB] = A) * = the complex conjugate of the expression in parentheses,(A + jB)* = (A – jB) Note : for more details about the negative seq. impedance characteristic , please refer to (paper: NEGATIVE-SEQUENCE IMPEDANCE DIRECTIONAL ELEMENT, Bill Fleming Schweitzer Engineering Laboratories, Inc. Pullman, WA USA ). Test Current: From the above equation the test current values that you need to apply to the relay to test the element. For the negative sequence current I2, the result is: Multiply the quantities in I2 by three to obtain 3I2, the negative sequence current that the relay processes. With a fixed applied negative sequence voltage VA, the relay negative sequence voltage is 3V2. Set Z2c = Z2F to find the test current magnitude at the point where the impedance calculation equals the forward fault impedance threshold. - Then the forward impedance fault current is When :

17. - For a reverse fault impedance threshold, where Z2c = Z2R, then the reverse impedance fault current is : When the angle : This test confirms operation of the F32Q and the R32Q negative-sequence directional elements. Where : F32Q : Forward negative-sequence voltage-polarized directional element R32Q: Reverse negative-sequence voltage-polarized directional element Z2F: Forward Directional Z2 Threshold Z2R:Reverse Directional Z2 Threshold Note: when Z2F and Z2R Set Automatically If configuration setting E32 = AUTO, settings Z2F and Z2R (negative sequence impedance values) are calculated automatically, using the positive sequence line impedance magnitude setting Z1MAG as follows: Z2F = Z1MAG/2 (Ohm secondary) Z2R = Z1MAG/2 + 0.1 (Ohm secondary; 5A nominal) Z2R = Z1MAG/2 + 0.5 (Ohm secondary; 1A nominal) Where: Z1MAG is the protective line positive sequence impedance The Z2c is equivalent to Z2MEASURED. The criteria for declaring forward and reverse fault conditions are: • z2 < Z2F threshold : Forward fault condition • z2 > Z2R threshold : Reverse fault condition Test procedure of the Directional Element for Phase Faults (Unsymmetrical faults): · Using AcSELerator QuickSet software , Do the following: - Confirm that ELOP (If It is Enabled) is set to N . - Load Encroachment (If It is Enabled and can effect the test), and confirm that ELOAD is set to N. - Be sure that the relay seeing the CB closed continuously (52a asserted). - Confirm the following settings: E32 is AUTO, ORDER is QV. - Display the F32Q and R32Q Relay Word bits on the AcSELerator QuickSet/ HMI/Over view. - Calculate impedance thresholds: a. For example, apply an A-phase voltage of VA = 3V2 = 20.0 ∠180º V secondary (other phase voltages VB and VC will be zero volts ). b. Use the previous mentioned equation to find the current that is equal to the reverse impedance threshold Z2R and Z2F threshold : From the setting file : Z2f = 9.92 Ohms Z2R = 10.42 Ohms

18. Expected operating current for direction function: · I Test ( forward) = 20 / 9.92 = 2.016 A · I Test ( reverse) = 20 / 10.42 = 1.919 A · The angle for both (I Test ( forward)) & (I Test ( reverse)) = 180 – 79.45 = 100.55º - Connect a single current test source - Set the current source for IA = 0.0 ∠ 100.55° A. - Slowly increase the magnitude of IA to apply the source test current. - Using AcSELerator QuickSet software /HMI/Device Overview , Monitor the status of R32Q and F32Q signals. - Observe the Relay Word bit R32Q asserts when |IA| = 0.1 A, indicating that the relay negative-sequence current is greater than the 50RP pickup threshold.R32Q deasserts when |IA| = 1.919 A, indicating that the relay negative-sequence calculation Z2c is now less than the Z2 reverse threshold Z2R - Continue to increase the current source while you observe the Relay Word bit F32Q asserts when |IA| = 2.016 A, indicating that the relay negative-sequence calculationZ2c is less than the Z2 forward threshold Z2F. Setting Expected operating current Injected Voltage Directional Status WORD BIT FORWARD NEGATIVE SEQUENCE IMPEDANCE Z2F =3.87 ohm For forward direction ≥ 5.16A ∠100.55 º VA=20∠180º , VB=VC= Zero 5.18<100.55 F32Q For forward direction ≥ 2.87A ∠100.55 VA=11.11∠180º , VB=VC= Zero 2.876<100.5 F32Q For forward direction ≥ 1.43A ∠100.55 VA=5.555∠180º , VB=VC= Zero 1.44<100.5 F32Q For forward direction ≥ 0.28A ∠100.55 VA=1.111∠180º , VB=VC= Zero 0.289<100.5 F32Q REVERSE NEGATIVE SEQUENCE IMPEDANCE Z2R = 4.37 ohm For reverse direction ≤ 4.58A∠100.55 º VA=20∠180º , VB=VC= Zero 4.586<100.5 R32Q For reverse direction ≤ 2.55 A∠100.55 VA=11.61∠180º , VB=VC= Zero 2.55<100.5 R32Q For reverse direction ≤ 1.26A∠100.55 VA=5.804∠180º , VB=VC= Zero 1.27<100.5 R32Q For reverse direction ≤ 0.25A∠100.55 VA=1.161∠180º , VB=VC= Zero 0.25<101 R32Q Power Swing/Out Of step function: - If the breaker open, simulate (52A = 1) status closed to deassert open pole logic, else out of step function will be blocked. - for power swing test apply three phase voltages and 3 phase currents to the relay. - The reactance reach of Z5 & Z6 are perpendicular on the protective line angle. - The Resistive reach of Z5 & Z6 are parallel to the protective line angle. J.5.1 Power swing boundaries reach test: For test purposes we need to assign the following signals to output contacts to check the reaches of the Out Of Step characteristic

19. X6ABC: Zone 6, out-of-step distance element, instantaneous X7ABC: Zone 7, out-of-step distance element, instantaneous - From the setting file drew the reach of the Z5 and Z6 of the out of step function. Item Description Checked 1 Print out from Test Kit attached Ok Impedance tolerance: +/- 5%, refer Instruction manual page: 4.22 Power swing blocking test: Note: Out of step function logic prevents designated zones from tripping for up to 2 seconds. For test purposes we need to assign the following signals to output contacts to check the blocking distance zones. OSB: Out-of-step block condition declaration. Distance Zones trip: Z1GT+Z2GT+Z3GT+Z4GT+Z1PT+Z2PT+Z3PT+Z4PT AND (NOT OSB) - To test Z1,Z2 or Z4 ( Froward zone ) ,Apply impedance point outside Z7 in the 1st quarter. - Apply impedance point inside the area between Z7 and Z6 for more than the Out-of-Step Block Time Delay setting (OSBD). Check that OSB signal appeared after the OSBD setting time. - Apply impedance point inside the Z4 for duration less than 2 sec and check that the relays didn’t trip. - Repeat the same for the other zones by applying impedance point inside Z2,Z1 or Z3 directly after the impedance point in the area between Z7 and Z6. Note: For Z3 (Reverse zone) out of step blocking, Apply impedance points from the 3 quarter as the following: - Impedance point from outside Z7. - Impedance point between Z7 and Z6 for time more than the setting OSBD. - Impedance point inside the Z3 (reverse zone) for time duration less than 2 second and check that Z3 didn’t trip. -

20. CONTACT OSB Distance Zone Out of step blocking test Result 1 Z1 Trip after OSB Reset time =2.0 sec OK 2 Z2 Trip after OSB Reset time =2.4 sec OK 3 Z3 Trip after OSB Reset time =3.2 sec OK 4 Z4 Trip after OSB Reset time =2.8 sec OK Measurement of the OSB reset time blocking time ( fixed 2 sec ) = 2 sec Measurement of the OSBD Operate time INJECT FROM FREJA 3 STAGES 1 ST OUTTER FOR 10 ms AND 2nd INNER FOR RESET TIME AND 3rd MORE THAN OSBD OR OSB DUAL CONTACT SETTING (CYCLE) 5 CYC FINAL=5 CYC RESULT (SEC) 5 Note : OSBD out of step blocking Operate time delay between outer & inner VTS FUNCTION TEST (LOSS OF POTENTIAL): Inputs into the LOP logic are: - 3PO three-pole open condition (indicates circuit breaker open condition) - V1 positive-sequence voltage (V secondary) - I1 positive-sequence current (A secondary) - V0 zero-sequence voltage (V secondary) - I0 zero-sequence current (A secondary) - V2 negative-sequence voltage (V secondary) Figure 4: Loss of Potential Logic (LOP) Operation Philosophy for LOP Logic: The circuit breaker has to be closed (Relay Word bit 3PO = logical 0) for the LOP logic to operate. Loss-of-potential is declared (Relay Word bit LOP = logical 1) when a 10 percent drop in V1 is detected, with no corresponding change in I1 or I0. If the LOP condition persists for 60 cycles, it latches in. LOP resets (Relay Word bit LOP = logical 0) when all three of the phase voltages return above 40 V secondary, V0 is less than 5 V secondary, and V2 is less than 15 percent of V1. Note: if setting ELOP = Y and a loss-of-potential condition occurs (Relay Word bit LOP asserts to logical 1), overcurrent elements set direction forward are enabled (from the 311L manual see Figure 4.47). These direction forward overcurrent elements effectively become non-directional and provide overcurrent protection during a loss-of-potential condition. Note : The VT MCB contact is not available as part from the LOP algorithm , but we can use the opto-input of the VT MCB to create blocking for the tripping output contacts for the protection functions which depends on the voltage. For example : Out205 = !IN307*(Z1T+Z2T+Z3T+Z4T) , that equation means if the IN307 asserted then the output contact 205 will not operate for any zone trip.

21. Loss of potential test for loss of one , two or three phases: - CB status should be seen by the SEL-311L relay as closed (Binary input IN102 is asserted) to avoid the blocking of the open pole logic for the LOP function - Apply 3 Phase rated voltage (Ur V) with balanced angles. - Apply 3 Phase rated current (Ir A) with balanced angles. - Within one step remove the voltage on one phase and / or two phases . - Repeat the same by removing three phase voltages . Note: To reset LOP signal, you have to inject phase voltages return above 40 V secondary on the three phases. PHASE UNDER TEST Applied balance Voltage Applied Balance Current Voltage lost Result A 66.4V 1 A ok B 66.4V 1 B ok C 66.4V 1 C ok A,B,C 66.4V 1 A,B,C ok K.2 Checking the conversion of the Direction E/F to Non-Directional E/F during LOP : Note: If the LOP set as Y and LOP asserted, the DEF will convert to non-directional E/F. If the LOP set as Y1 and LOP asserted the DEF will be blocked. Test procedure: · Dir. O/C and DEF blocking during LOP: - Apply setting (LOP = Y1) to the relay. - Make to get LOP signal by applying VA= 60 <100º volts and remove the voltage to zero in one shot. - Apply current on phase A ( IA=2 < 100º ). - Check that DEF didn’t operate. · DEF converting to Non-Dir E/F: - Apply setting (LOP = Y) to the relay. - Make to get LOP signal by applying VA= 60 <100º volts and remove the voltage to zero in one shot. - Apply current on phase A ( IA=2 < 100º ). - Check that DEF operated. VT MCB contact: Assign one binary input (IN307) for (VT MCB ). Use that binary input (IN307) to block the tripping signal of the protection functions which depends on the voltage. Check the blocking of the tripping output contacts for the functions which depends on voltage when (VT MCB TRIP) [ ok ] PUT WITH FUNCTION FOR MAKE BLOCK Switch on to fault ( SOTF) : Switch-Onto-Fault (SOTF) trip logic provides a programmable time window for selected elements to trip right after the circuit breaker closes. “Switch on to fault” implies that a circuit breaker is closed into an existing fault condition, Refer to the switch-onto-fault trip logic in the 311L manual Figure 5.7 (middle of figure). The SOTF trip logic permits tripping if both the following occur: ➤ An element asserts in SELOGIC control equation trip setting TRSOTF ➤ Relay Word bit SOTFE is asserted to logical 1 SOTF Initiation: The relay validates an SOTF condition by sensing the following: ➤ Upon circuit breaker opening: detection of a pole open condition (3PO) when setting 52AEND (52A Pole Open Qualifying Time Delay) is other than OFF ➤ Upon circuit breaker closing: detection of a pole open condition (3PO) when setting CLOEND (Close Enable Time Delay) is other than OFF.

22. Circuit breaker operated switch-onto-fault logic is enabled by making time setting 52AEND (52AEND = OFF). Time setting 52AEND qualifies the three-pole open (3PO) condition and then asserts Relay Word bit SOTFE: SOTFE = logical 1 Open pole (3PO) depends on monitoring CB status (52A) and and current is below phase pickup 50LP (50L = logical 0). Note that SOTFE is asserted when the circuit breaker is open. This allows elements set in the SELOGIC control equation trip setting TRSOTF to operate if a fault occurs when the circuit breaker is open (see 311L manual Figure 5.7). When the circuit breaker is closed, the 3PO condition deassert (3PO = logical 0) after the 3POD dropout time (setting 3POD is usually set for no more than a cycle). The SOTF logic output, SOTFE, continues to remain asserted at logical 1 for dropout time SOTFD time. Relay Word bit SOTFE is the output of the circuit breaker operated SOTF logic or the close bus operated SOTF logic described previously. Time setting SOTFD in each of these logic paths provides the effective time window for the instantaneous elements in SELOGIC control equation trip setting TRSOTF to trip after the circuit breaker closes (see Figure 5.7, middle of figure from 311L manual). Time setting SOTFD is usually set around 30 cycles. An instantaneous element is usually set to trip in the SELOGIC control equation trip setting TRSOTF (e.g., TRSOTF = M2P + Z2G + 50P1). Note :If the voltage potential for the relay is from the line-side of the circuit breaker, the instantaneous overcurrent element in the SELOGIC control equation trip setting TRSOTF should be non-directional. When the circuit breaker is open and the line is de-energized, the relay sees zero voltage. If a close-in three phase fault condition exists on the line (e.g., safety grounds accidentally left attached to the line after a clearance) and then the circuit breaker is closed, the relay continues to see zero voltage. The directional elements have no voltage for reference and cannot operate. In this case, the instantaneous overcurrent element in the SOTF trip logic should be non-directional. Close Signal Monitor ( Manual close command ): Assign the Relay Word bit CLSMON to a control input, so the relay can detect execution of the close command. Connect IN308 in parallel with the circuit breaker close coil. CLSMON := IN308 Close Signal Monitor (SELOGIC Equation) SOTF settings: · Inside setting file /Group 1/Set 1/Switch-Onto-Fault : ESOTF = Y CLOEND (CB close enable time delay ) = 10 Cycles 52AEND ( the required time to open the CB poles and confirm that CB opened) =10 cycles SOTFD (The time which the SOTF will reset after closing the CB)= 30 Cycles · Inside setting file /Group 1/Logic 1/(Trip/Comm- assisted trip logic ) : TRSOTF = M2P+Z2G+50P1 · Inside setting file /Group 1/Logic 1/Other Equations/CLMON : CLMON = IN308 (Assigned IN308 for Manual close signal ) SOTF initiated by Manual CB close: Insert the following settings: ESOTF = Y CLOEND (CB close enable time delay ) = 10 cycles SOTF function not work by m/c only if relay see the CB open pole before m/c signal by CLOEND tiMe 52AEND ( the required time to open the CB poles and confirm that CB opened) = off SOTFD (The time which the SOTF will reset after closing the CB)= 30 Cycles ( assign SOTF tripping equation to zone 2 as described above)

23. Note : Using AcSELerator QuickSet software /HMI/Device Overview check the Indications SOTFE or assign output contact for SOTFE to monitor the initiation of SOTF. simulate 2 stages; stage 1: simulate CB open (No current and voltages) , stage 2: fault case within Z1,Z2 and close up fault ( no voltages, 50P1 will trip instantaneously). at stage1 give manual close pulse ( IN308) for sufficient duration after CLOEND timer setting. CLOEND (CB close enable time delay ) Inject From FREJA 2 Stages 1 ST Stage Live And 2 ND Stage Open Pole And M/C Start Contact Open Pole Contact And Stop Contact Sotf Enable SOTFD (The time whichE the SOTF will reset after closing the CB) M. Aided (21 & 67N ) blocking scheme : - The required scheme is Aided DEF blocking scheme, -The used Aided scheme is Directional Comparison Blocking (DCB). Aided tripping equation is ( TRCOMM = M2P+Z2G+67G2). -The DCB scheme, Zone 2 overreaching distance elements (set direction forward) with a short delay are used instead. The short delays provide necessary carrier coordination delays (waiting for the block trip signal). See Figure 5.19. These elements are entered in trip setting TRCOMM. - Enable the Directional Comparison Blocking (DCB) logic by setting ECOMM = DCB. The DCB logic in Figure 5.19 performs the following tasks: ➤ Provides the individual carrier coordination timers for the Level 2 directional elements M2P, Z2G, 67G2, and 67Q2 via the Z2PGS and 67QG2S Relay Word bits. These delays allow time for the block trip signal to arrive from the remote terminal. For example: TRCOMM = Z2PGS + 67QG2S ➤ instantaneously keys the communications equipment to transmit block trip for reverse faults and extends this signal for a settable time following the dropout of all Level 3 directional elements (M3P, Z3G, 67G3, and 67Q3). ➤ Latches the block trip send condition by the directional overcurrent following a close-in zero-voltage three-phase fault where the polarizing memory expires. Latch is removed when the polarizing memory voltage returns or current is removed. ➤ Extends the received block signal by a settable time - BT–Received Block Trip Signal(s) : In two-terminal line DCB applications, a block trip signal is received from one remote terminal. One optoisolated input on the SEL-311L (e.g., input IN104) is driven by a communications equipment receiver output (see Figure 5.20from 311L manual ).Make SELOGIC control equation setting BT:BT = (IN301+!IN103)+(IN302+!IN104) (two-terminal line application)SELOGIC control equation setting BT is routed through a dropout timer (BTXD) in the DCB logic in Figure 5.19. The timer output, Relay Word bit BTX, is routed to the trip logic in Figure 5.7from the 311L manual. SOTF IN Measured Time (m sec) Close up fault ( No voltage) 16 Zone 1 15.3 Zone 2 12.4 setting Calculated value ( sec) Measured Time (sec) 60 Cycles 1.0 1.02 setting Calculated value ( sec) Measured Time (sec) 10 Cycles 0.167

24. Timer Settings · Z3XPU–Zone (Level) 3 Reverse Pickup Time Delay Current-reversal guard pickup timer—typically set at 2 cycles. · Z3XD–Zone (Level) 3 Reverse Dropout Extension Current-reversal guard dropout timer—typically set at 5 cycles. · BTXD–Block Trip Receive Extension Sets reset time of block trip received condition (BTX) after the reset of block trip input BT. · 21SD and 67SD–Zone 2 Short Delay Carrier coordination delays for the output of Zone 2 overreaching distance elements 21SD and 67SD are typically set at 1 to 2 cycles. - 67G2T will be used to detect the forward faults. - 67G3T will be used to detect the reverse faults to send blocking signal. Note : The directionality of the DEF function is common with Distance function too. 1. The communication scheme is common for 21 and 67G. 2. DCB scheme accelerates 21 – zone2 and 67G- level2 to with carrier co-ordination time. For 21, it is 21SD – short delay and for 67G, it is 67SD short delay. 3. DCB scheme send Block signal DSTRT, when 21- zone3 or 67 – level3 starts. This signal includes current reversal timer. The current reversal timers Z3XPU ( CR pickup delay, typically 2 cyc) , Z3XD (CR drop off delay, typically 5 cyc). 4. DCB scheme has Block trip input ( channel/ block receive ) in SELogic equation, BT = (IN301+!IN103)+(IN302+!IN104),In this equation the inputs shall be assigned that wired to CR for 21 and 67G, if they have independent channels. BT output has a OFF-time delayed output BTX from off-delay timer BTXD (Block trip receive extension). The BTX is used to block instant trip from 21-Zone2 and 67G-level2. The BTXD shall be set zero if you have already set Z3XD as CR timer at remote end. 5. The comm.-assisted trip shall be TRCOMM = Z2PGS + 67QG2S, these elements includes the carrier coordination delay. M.1 Distance Comm. Scheme test: · CHANNEL Send test: - Apply zone3 fault and record the operating time of CS contact. DSTRT operating time = …………16ms…… · Current Reversal timer: - Apply zone3 fault for duration less than Z3XPU and remove the fault. Then measure reset time of CS contact. It shall reset instantly. Inject from freja 2 stages 1 st stage Z3 fault and 2 nd stage healthy condition SETTING (CYCLE) 1 RESULT (ms) 31.6 - Apply zone3 fault for duration just greater than Z3XPU and remove the fault. Then measure reset time of CS contact. It shall reset after Z3XD time delay. SETTING (CYCLE) 6 RESULT (ms) 126.4 - Measure time : 116.9 ms · COMM trip test - Apply zone2 fault with CR and channel healthy. It shall trip with zone2 time. Note down LED indication. Tripping time = ………429.6 ms…………. LED indication = NO Comm indication CONTACT=(Z2P OR Z2G AND COMPRM AND PLT02) AND TRIP OR Z2PT OR Z2GT PLT02 =PUSHPOTTOM FOR COMM ENABLE - Apply zone2 fault without CR and channel healthy. It shall trip with zone2 (21SD ) aided time setting (typically 1.5cyc) + 21SD time. Note down LED indication.

25. SETTING (CYCLE) 2 RESULT (ms) 43.4 LED Indication: Comm - Apply zone2 fault without CR and channel unhealthy. It shall trip with zone2 time. Note down LED indication. Tripping time = ……429……… ms LED indication = NO Comm indication M.2 DEF Test: 67G2 – Forward DEF element with Backup delay timer. This element would trip on comm. Aided trip with no CR and channel healthy immediately after 67SD time. This will also issue forward backup delay trip 67G2T (should be in TR equation) after a longer time delay. 67G3 – Reverse DEF element, this element would send only CS. · DEF sensitivity test: Note : Be sure that LOP is not asserted else LOP will block the 67G2 function. Note : Use the same way of testing the directionality of Distance function which described before at point (J.4). - Forward element pick up: Apply balanced, 3ph voltage and reduce A-ph voltage, Apply current in A-ph with (0-79.45+180 ) angle. Increase the current until the 67G2 pick up. For example: Three-Phase Va = 37<0 volts Vb = 67<-120 volts Vc = 67<120 volts - Forward element pick up / drop off value - Operating time checked : - Reverse element pick up: Apply balanced, 3ph voltage and remove A-ph voltage, Apply current in A-ph with (0-79.45+180) angle. From the point of the picking up ( 67G2) decrease the current until the 67G3 pick up. - Reverse element pick up / drop off value · Directional test: (optional because it is the same test which done for the directionality for Distance protection): Note : Use the same way of testing the directionality of Distance function which described before at point (J.4). setting Pick up Value ( A) Drop off Value ( A) STATUS 0.20 A 0.203 0.198 67G2 FW setting Calculated value ( sec) Measured Time (sec) 72 Cycles 1.2 1.22 setting Pick up Value ( A) Drop off Value ( A) STATUS 0.20 A 0.203 0.196 67G3 RV

26. Setting Expected operating current Injected Voltage Directional Status Word bit FORWARD NEGATIVE SEQUENCE IMPEDANCE Z2F =11.11 ohm For forward direction ≥ 1.8A ∠100.55 º VA=20∠180º , VB=VC= Zero 5.18<100.55 ok For forward direction ≥ 1.0A ∠100.55 VA=11.11∠180º , VB=VC= Zero 2.876<100.5 ok For forward direction ≥ 0.50A ∠100.55 VA=5.555∠180º , VB=VC= Zero 1.44<100.5 ok For forward direction ≥ 0.10A ∠100.55 VA=1.111∠180º , VB=VC= Zero 0.289<100.5 ok REVERSE NEGATIVE SEQUENCE IMPEDANCE Z2R = 11.61 ohm For reverse direction ≤ 1.723A∠100.55 º VA=20∠180º , VB=VC= Zero 4.586<100.5 ok For reverse direction ≤ 1.0 A∠100.55 VA=11.61∠180º , VB=VC= Zero 2.55<100.5 ok For reverse direction ≤ 0.50A∠100.55 VA=5.804∠180º , VB=VC= Zero 1.27<100.5 ok For reverse direction ≤ 0.10A∠100.55 VA=1.161∠180º , VB=VC= Zero 0.25<101 ok · DEF comm. scheme trip test: - Apply forward ground fault 2x 50G2P with no CR and channel healthy. Relay trip with COMM trip with 67SD time delay. Measure time : 41.4 ms - Apply forward ground fault 2x 50G2P with CR and channel healthy. Relay trip with back DEF trip with 67G2D time delay. SETTING (CYCLE) 72 RESULT (ms) 1.22 - Apply forward ground fault 2x 50G2P with no CR and channel unhealthy. Relay trip with back DEF trip with 67G2D time delay. Measure time : 1.22 ms · DEF comm. scheme Channel send test: - Apply reverse ground fault, check the operating time of CS contact . Measure time : 15.6 ms · Current Reversal timer (DEF): - Apply reverse ground fault for duration less than Z3XPU and remove the fault. Then measure reset time of CS contact. It shall reset instantly. SETTING (CYCLE) 1 RESULT (ms) 21.3 - Apply reverse ground fault for duration just greater than Z3XPU and remove the fault. Then measure reset time of CS contact. It shall reset after Z3XD time delay. SETTING (CYCLE) 6 RESULT (ms) 121

27. M3 - FAULT LOCATOR: Length = Km Line Impedance = Ω Results for Distance Relay: Item Fault Type Distance to Fault Relay Fault Location Km Remarks Expected Actual 1 R-N 25% Line Length 2 Y-B 25% Line Length 3 B-N 25% Line Length 4 R-Y 50% Line Length 5 Y-N 50% Line Length 6 B-R 75% Line Length 7 R-Y 75% Line Length 8 Y-B 100% Line Length 9 R-Y-B 100% Line Length SYNCHRO CHECK SETTING BUS-RESULT LINE RESULT 10DEG 10 10 50mH 50 50 OVER VOLTAGE SETTING BUS RESUT LINE RESULT 73 V 73 73 UNDER VOLTAGE SETTING BUS RESULT LINE RESULT 53 53.01 53 AUTO RECLOSER SETTING RESULT DEAD TIME 3 SEC 3.026 RECLAMTIME 15 SEC 15.05 CUIRCIT BREAKER FAIL SETTING RESULT TIME 150 mS 151mS CURRENT 0.1A 0.102 A

28. Time inverse over current I=1.2A CURVE=U1 TMS=0.2 PICK UP DROP OFF TIME 1.202 1.199 0.398 Measurement

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