for a 11kv transmission line what capacity of CTs & PTs are
required?
Answers were Sorted based on User's Feedback
Answer / srinivasan.s
For 11KV line CT ratio was 1200A-600A-300A/1Amp
PT ratio was 11KV/110V
for 11KV CT's PT's minimum 3cores are available
generally 1'st core for metering
2nd and 3rd cores for protection purpose.
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Answer / khalid k usafzai
for installing cts and pts on 11 kv line first of all the load to be connected is required.then we will proceed.bye
Is This Answer Correct ? | 5 Yes | 3 No |
Answer / shivadathathri
11 KV CTs & PTs , Out door Pedestal mounting versions will do. Current ratio , STC Rating & Insulation level can be determined with connected load. Like breaker / Transformer Etc. Example : Load is 11KV 100KVA transformer is connected . Then use 11KV Cts CTR: 5/5 Amps , Class 0.5 for metering , Class : 5p10 for Protection . OCF - 150XI nominal . Oil cooled CTs for MUSS. If it is mounted inside panel / Control room then Use Resin cast type. SHIVADATHATHRI- 9632153842.
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Answer / alternate_reality
A 100/5 Amp CTPT can be installed for metering purpose in
Indsustries...
Is This Answer Correct ? | 2 Yes | 3 No |
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WHAT SHOULD BE THE BEST CURRENT RATINGS (PRIMARY / SECONDARY)FOR A CT INSTALLED AT THE INCOMING 11KV PANE? WILL IT BE CALCULATED ON THE BASES OF MAXIMUM DEMANT VALUE OR ON SUM OF ALL TRANSFORMER'S KVA? NOMALLY MAX DEMAND REPRESENT THE MAXIMUM OPERATING LOAD OF THE PLANT AND TOTAL KVA OF (SAY 5 NUMBERS TRANSFORMERS) REPRESENT THE CONNECTED LOAD. WHICH i.e. MAX DEMAND KVA OR CONNECTED KVA ARE BETTER TO USE FOR CT CURRENT CALCULATION? PLEASE ANSWER.
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