Answer / jai prakash narain singh

MCCB-moulded case circuit breaker.mccb has protection for
over current,which can be set by turning the current
setting knob and you can also set the delay time.in case
over current occur for more than set time,it will trip the
mccb ,to protect the ckt

What will be the change in its efficiency and other parameters of a ONAN transformer if it changed to ONAF transformer ?

3 Answers   Tesla,

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is that a problem if i connect a single phase load to a secondry delta connected transformer but i get a neutral from other transformer i the system?

0 Answers  

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Sir we have 12.5 MVA(110/11KV) transformer (Y-Y) connected,which tripped showing earth fault,when we charged transformer it stood OK ,but on connecting 11 KV feeders it tripped showing earth fault.our service engineers found that the B phase and R phase phase connecting to neutral broken from HV OLTC(on load tap changer),and R phase and Neutral is ok.Dissolved gas analysis shows that accetline content is high,tan delta value is 12.My dout is it is an internal fault of transformer,why REF or diffrential relay is not acted?

1 Answers  

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What is reverse power relay?

0 Answers  

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what is the clear formula to calculate cable size for a load

0 Answers   TCS,

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what is the similarity and difference between ups and inverter?

4 Answers   GMR,

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how to select the cable size? any formula to calculate cable size?

4 Answers  

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Why we transmit the power at the voltage in the multiple of 11 or 1.1 like 11kv, 22kv, 66kv, 132kv...... some one told me that it is due to fomr factor 1.1 of sine wave. its fine but while transforming we can choose any voltage, so why only multiple of 1.1 there also.......? plz tell me.

7 Answers  

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what is AMF panel????????

8 Answers   ACC, Shree Cement,

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How can we calculate single phase load into three phase load

2 Answers   Jindal, Tanfac,

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what is electricity.

6 Answers   HP, L&T,

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Seamless tubes are made by?

5 Answers   Bhel,

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