Why CT's shall not be kept open?

5 Answers   ABC, Qatar Gas, TIPL,

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how test transfomer(3 phase75kva) by megger

0 Answers   HPL,

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what is the last range of mccb in amp?

2 Answers  

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I am completed DEEE in tamilnadu, now i am working in andhrapradesh with 2.5 year experience in relavent field. capacity of the tranformer is 11KV, 1MVA Transformer, i am eligible for getting c licence in andhrapradesh pl help me.

0 Answers  

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will three phase energy meter run without one phase

2 Answers  

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hi i am aziz electrical associate engineer. i am faceing problem in acs800 vvvf drive.it is tripping wothout any alarm/fault.i cheaked all parameters and fault function of drive, all are correct as well as communication parameters.but still it is tripping (drive is tripping in running position not in starting)

1 Answers  

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A transformer has negative voltage regulation when its load PF is A zero B unity C lagging D leading

1 Answers  

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Dear All, In a 400V power system, ratio of three current transformers installed incoming switchgear is 4000/1. Maximum three phases short circuit current of this system is 48kA. One CT is installed on neutral of upstream transformer (6/0.42kV, solidly earthed) for 51G protection. Would you please inform me about the correct CT ratio of this current transformer (on neutral)?? Thanks a million

2 Answers  

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why any Elelctricity board insist not to change the buren of their metering CTs or PTs for metering purpose? as a example elect. board not accepted that any customer change their metering CT or PT core burden from 5VA to 15VA.. why?

1 Answers  

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can any one explain about when EB supply failed then how the load will transfer onto DG's step by step.

1 Answers  

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how the testing of CT OF 400/200/100 done in33/11 kv s/s

1 Answers   Reliance,

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Why RCD trips on connecting to one Socket but not trips one other circuit on same RCD.

1 Answers  

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