7/27/2019 Check List for Testing of Backup Protection Relay...1

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Maharashtra State Electricity Transmission Company

Testing & Communication Circle, Aurangabad

Check List for Testing of B/U Relay Where ever No or Not Applicable (NA) selected, mention specific remarks on separate sheet Page 1 of4

CHECK LIST FOR TESTING OF BACKUP PROTECTION RELAY

EHV Sub Station - Bay - Date -

Relay Make - Type - Sr. No. -

Direction -

Sr. No. Particulars of the test Whether carried out

1 Pickup Test for Ph O/C Element ( R, Y & B )

2 Pickup Test for E/F Element

3 IDMT Ph O/C Time of Operation for 2xIn, 3xIn, 4xIn

4 IDMT E/F Time of Operation for 2xIe, 3xIe, 4xIe

5 DMT(HS) Ph O/C Operational Current & Timing (R, Y & B)

6 DMT(HS) E/F Operational Current & Timing

7 Ph O/C Maximum Torque Angle (Characteristic Angle )

8 E/F Maximum Torque Angle (Characteristic Angle )

9 Configuration of LEDs as per schematic

10 Ph O/C Operation Indications R Ph, Y Ph, B Ph (Flag / LED )

11 E/F Operation Indication ( Flag / LED )

12 DMT(HS) Ph O/C Operation ( Flag / LED )

7/27/2019 Check List for Testing of Backup Protection Relay...1

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Maharashtra State Electricity Transmission Company

Testing & Communication Circle, Aurangabad

Check List for Testing of B/U Relay Where ever No or Not Applicable (NA) selected, mention specific remarks on separate sheet Page 2 of4

13 DMT(HS) E/F Operation ( Flag / LED )

14 Communication with relay through laptop

15 Setting changes through laptop / HMI

16 Output Contact Configuration through lap top / HMI

17 Input (opto-coupler) Configuration through lap top / HMI

18 Checking of all Inputs by external simulation on relay display

19 Checking of all Output contacts / relay during testing

20 DR trigger settings adopted as per standard practice

21 DR Trigger checking as per settings adopted

22 DR downloading and conversion to CFG format

23 Calculation and settings of Ph O/C PSM, TMS and DMT (HS)

24 Calculation and settings of E/F PSM, TMS and DMT (HS)

25 Operation of Master Trip Relay by Backup Protection

26Confirm CT star point towards object to be protected is set in the relay.(Confirm P1terminal is towards Bus)

27 Annunciation confirmation on control panel

28 Confirmation of Load current and angle on relay display

29 Confirmation of PT voltages and angle on relay display

7/27/2019 Check List for Testing of Backup Protection Relay...1

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Maharashtra State Electricity Transmission Company

Testing & Communication Circle, Aurangabad

Check List for Testing of B/U Relay Where ever No or Not Applicable (NA) selected, mention specific remarks on separate sheet Page 3 of4

30 Confirmation of PT neutral connection to relay by removing 1ph PT fuse

31 Confirmation of Direction with available load current for O/C element

32 Confirmation of Direction with available load current for E/F element33 Confirm testing of relay through TTB, if provided.

34 Confirm blocking of Tripping and CT shorting while testing the relay through TTB

35

36

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38

39

40

Dy. Ex. Engineer

EHV Testing Unit -Project

Testing Division -LATUR

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Maharashtra State Electricity Transmission Company

Testing & Communication Circle, Aurangabad

Check List for Testing of B/U Relay Where ever No or Not Applicable (NA) selected, mention specific remarks on separate sheet Page 4 of4

Remarks about check point where No or NA selected

Sr.No.

Short Description of Check Point Remarks

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