Feeder Relay ID Pri. Sec. Phase in Pri. in Sec. Calculated Actual

TR-02

(HV SIDE) 7UT6121 60 1 IP 0.90 Iep 0.20 R-Phase 560 9.33 I>>> I>>>

60 1 TIP 0.60 TIep 0.30 Y-Phase 440 7.33 IE>> IE>>

5P20 I>>> 7.00 IE>> 0.70 B-Phase 350 5.83

TI>>> 0.00 TIE>> 0.00 Earth Current60.84 1.01

I>> 0.90 IE> 0.20

TI>> 0.80 TIE> 0.40

IP 0.90 Iep 0.10 R-Phase 7120 9.89 I>>> I>>>

TIP 0.10 TIep 0.10 Y-Phase 5520 7.67

(Incomer-1) - I>>> 3.00 IE>> 0.50 B-Phase 4320 6.00

TI>>> 0.00 TIE>> 0.50 Earth Current60.84 809.3

I>> 2.00 IE> -

TI>> 0.50 TIE> -

IP 0.05 Iep 0.10 R-Phase 7120 11.9 I>>> I>>>

TIP 0.06 TIep 0.06 Y-Phase 5520 9.20 Ip (Tr=0.07s)

5P10 I>>> 3.00 IE>> 0.50 B-Phase 4320 7.20

TI>>> 0.00 TIE>> 0.10 Earth Current60.84 809.3

I>> 2.00 IE> -

TI>> 0.50 TIE> -

IP - Iep - R-Phase 7120 11.9

TIP - TIep - Y-Phase 5520 9.20

5P10 I>>> - IE>> - B-Phase 4320 7.20

TI>>> - TIE>> - Earth Current60.84 809.3

I>> - IE> -

TI>> - TIE> -

IP 0.80 Iep ∞ R-Phase 7120 237.3 I>>>

TIP 0.20 TIep 0.20 Y-Phase 5520 184.0

5P10 I>>> 10.00 IE>> 2.00 B-Phase 4320 144.0

TI>>> 0.00 TIE>> 0.20 Earth Current60.84 2.028

I>> 4.00 IE> -

TI>> 0.20 TIE> -

IP - Iep - R-Phase 7120 237.3 NA

TIP - TIep - Y-Phase 5520 184.0

I>>> - IE>> - B-Phase 4320 144.0

TI>>> - TIE>> - Earth Current60.84 2.028

I>> - IE> -

TI>> - TIE> -

IP 0.80 Iep ∞ R-Phase 7120 237.3 I>>>

TIP 0.20 TIep 0.20 Y-Phase 5520 184.0

I>>> 10.00 IE>> 2.00 B-Phase 4320 144.0

TI>>> 0.00 TIE>> 0.20 Earth Current60.84 2.028

I>> 4.00 IE> -

TI>> 0.20 TIE> -

5P10

Incomer

(TR - 1A)- 150 5

5P10

TR-02

(LV SIDE) 7SJ600 720 1

Incomer

(TR - 2A)- 150 5

600 1

Outgoing2 7SJ600 600 1

Relay Trip Element

Incomer

(TR - 3A)- 150 5

Relay Details CT Ratio Existing Relay Settings Fault Current

Phase OC Earth OC

At 11kV

(Incomer1

)

-

7UT6121 CTR - 60/1A

1250A

TR-01 10/12.5 MVA 132/11KV

YNynO,7.86/8%

CTR - 720/1A

CTR - 720/1A

1250A

7UT6121

CTR - 60/1A

1250A

TR-02 10/12.5 MVA 132/11KV

YNynO,7.86/8%

CTR - 720/1A

CTR - 720/1A

1250A B/C (1250A)

7SJ600

Incomer - 2

7SJ600 CTR - 600/1A

1250A

CTR - 600-300 / 5-5 A

1250A Incomer - 2

Outgoing - 2

7SJ600 CTR - 600/1A

1250A

CTR - 600-300 / 5-5 A

1250A Incomer - 1

Outgoing - 1

Incomer - 1

7SJ600

B/C (1250A)

CTR - 150/1A

630A

TR-1A 2.5 MVA 11/0.433KV

Dyn11

4000A

CTR - 150/1A

630A

TR-2A 2.5 MVA 11/0.433KV

Dyn11

4000A

CTR - 150/1A

630A

TR-3A 2.5 MVA 11/0.433KV

Dyn11

4000A

132KV PSEB SUPPLY

132KV Bus

11KV Bus

7836946389