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11kv/0.433kv, 2 mva , transformer , for protection and
metering how many CT/PT are required?
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Answer / shailesh taware
1 CT WITH 3 CORE
1st CORE FOR O/C & E/F PROTECTION
2nd CORE FOR METERING WITH INSULATION CLASS 0.5
3rd CORE FOR DIFFERENTIAL PROTECTION
1 PT WITH 2 CORE
1st CORE FORE O/C & E/F PROTECTION
2nd CORE FORE METERING
| Is This Answer Correct ? | 10 Yes | 3 No |
Answer / manjunath kunigal
one set of tertiary winding CT/PT is sufficient for both
metering and protection.
| Is This Answer Correct ? | 11 Yes | 9 No |
Answer / k n naidu
hi,
one three phase set of PTs for both protection & metering
and one three phase set of CTs with two secondary cores one
for metering and protection are required.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / mubanga mulenga
You need:
1)Inst., o/c, Metering & EF - 3 CT's
2) REF - 1 CT
3)SBEF - 1 CT
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / vikas chauhan
3 no CT (Double core) for 11 kv side for protection and
metering
3 no CT (Double core) for 0.433 kv side for protection and
metering
11/.110 KV 3 phase PT for 11 KV side
secondry side(.433KV side) phase directly connected for
Metering & select relays for .433 KV secondry voltage.
if you select differencial rotection
3 nos CT for Primary and 3 No CT for Secondry side and
interposing CT for Match and neutralise the current in
relay.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / d ramesh
11KV side(delta)
Line side 3core CT :1No. for metering, O/C&E/F protection,
Differential protection with ICT.
0.433KV(Star)
Nuetral CTs :1core for Standby E/F 5p20
Line CTs :3core CT:1No for metering, O/C&E/F
protection,Differential protection with ICT.
1No. 1-core CT in LV nuetral of Transformer of class 5P20
for earth fault protection.
panel side in the panel itself remaining CTs can be
provided for metering, O/C&E/F, and differential cores with
ICT. In both HV panel & LV panel.
| Is This Answer Correct ? | 2 Yes | 1 No |
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