I am getting differential earth fault in my transformer
realy , i have checked all its CT & control wiring but do
not get fault, Please help
- 6 Answers
- 6601 Views
- I also Faced
- E-Mail Answers
Answer Posted / k.prakashchandra
I think it is REFR which picks up only if there is earth
fault whithin the transformer .i.e. between LT an HT
CTs.and an NCT is to be provided
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
is it possible to test of bus bar in high rise building without completed full floor ?
how we select ac fuse rating of an power inverter???
Explain the laying procedure and laying depth of submarine/subsea power cable for 220/400KV system? Also available cable diameter?
how to measure the transformer resistance values(dyn11)?and howmuch the minimum value?
How is the percentage impedence of a transformer fixed at design stage???
why ct ,cvt should be stored in a vertical position?
Transformer diagram mention each parts ?
What is the working mechanism of OLTC in Power Transformers????
hi....I am from india..i have completed my engineering in electrical and electronics field with 58.4% and my IELTS score is 5.5 bands....Recently i received my I-20 in computer and information science from Troy university in Alabama.On 18th i have a visa interview can u please tell me what type of questions i have to answer ??????
hi all i like to know vat is power plot in control systems also i want to know abt latest trends in electrical & electronics
What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.
what should be correct gas pressures to be a 1.5 ac unite
I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?
How to calculate the sag of OPGW during stringing???
excitation limit of an excitor
