4160 & 480 Volts Switchgear Physical Checks & Inspection

This article is about 4160 & 480 Volts Switchgear Physical Checks & Inspection.

4160 & 480 Volts Switchgear Physical Checks & Inspection

All out going cables tightness and torque mark checking.

All breakers contact engagement checking.

All breakers contact engagement checking for 480 V Switchgear.

Outgoing cables shield wire through CBCT to be confirmed for all feeders (applicable to 4160 Switchgear).

Breakers front and back side internal inspection, removal of material inspection tags if any in the cubicles, housekeeping of switch gear etc.

Main ground cables tightness and torque marking checking on the ground bar.

Inspection of Front and back door interlock with breaker service position. (Applicable to 4160 Switchgear).

DC circuits point to point check from DCDB to each feeder.

DC CIRCUITS FOR 4160 V Switchgear.

1. CLOSING & TRIPPING CIRCUIT I/C # 1
2. SEL-751A-A CIRCUIT
3. SEL-787A CIRCUIT ( If Applicable )
4. CLOSING & TRIPPING CIRCUIT TIE ( 52-T)
5. SYNCHRONIZER
6. CLOSING & TRIPPING CIRCUIT I/C # 2
7. SEL-751A-B CIRCUIT
8. SEL-787B CIRCUIT ( If Applicable )
9. SEL- 2523 ANNUNCIATOR CIRCUIT

DC CIRCUITS FB FOR MOTOR ( If Applicable)

1. CLOSING , TRIPPING & MPR 469 CIRCUIT

DC CIRCUITS FB FOR TRANSFORMER ( If Applicable)

1. CLOSING , TRIPPING & SEL-751A CIRCUIT

DC CIRCUITS GEN-TIE 52-GT ( If Applicable)

1. CLOSING & TRIPPING CIRCUIT

DC CIRCUITS 52-GEN ESWR. ( If Applicable)

1. CLOSING & TRIPPING CIRCUIT
2. SEL-751A-GEN CIRCUIT

O/G FEEDER BRACKER

1. CLOSING , TRIPPING & SEL-751 52 LB

DC CIRCUITS FOR 480V SWITHGEAR.

1. CLOSING & TRIPPING CKT I/C # A.
2. SEL-751A-A2 CKT.
3. LINE A VOLT, AMP METER CKT.
4. SEL-751A-A1 CKT. IF Applicable.
5. CLOSING & TRIPPING CKT TIE ( 52-T).
6. SYNCHRONIZER CKT.
7. CLOSING & TRIPPING CKT I/C # B.
8. SEL-751A-B2 CKT.
9. SEL-751A-B1 CKT. IF Applicable.
10. LINE B VOLT, AMP METER CKT.
11. SEL- 2523 ANNUNCIATOR CKT.

O/G FEEDER BRACKER

1. CLOSING & TRIPPING CKT NON EMCC
2. CLOSING & TRIPPING CKT EMCC

IF Applicable

1. CLOSING & TRIPPING CKT 52 GEN I/C
2. GEN. LINE VOLT METER CKT.
3. CLOSING & TRIPPING CKT 52-GEN TIE

O/G FEEDER BRACKER

1. CLOSING & TRIPPING CKT 52 LB

Bus PT and Line PT ground connection checking. (applicable to 4160 Switchgear)

Check CT and PT loose connections.

Check All the Breakers Close /Open & Spring charging Operation Manually and electrically.

Check the Breakers Closed Breaker spring discharge when removing male plug and physical Alignment during rack in and rack out condition. ( Applicable to 4160 Switchgear ).

Verifying of Equipment Labelling.

Inspect the excess gaps / cable gland holes on the panel top which are to be plugged.

Physical Inspection of Transformers HRG Disconnect Switch and HRG Resistor Links (T1,T2 ,T3 and T4)

T1 TO T2 = 77 OHMS.
T2 TO T3 = LINK.
T3 TO T4 = 55 OHMS.
TOTAL = 132 OHMS.