Answer Posted / vicky

Batteries play a vital role in of a substation by providing
dc power for protection, supervision and control of
substation and line equipment. Frequently, transmission or
distribution power will be lost or reduced in magnitude
during system disturbances (faults) at the same time that
power is required to isolate the disturbance from the
system.
To provide a continuous power, most substation use dc power
from batteries. These batteries can range in size from 50
Ahr at 24 V dc to more than 1000 Ahr at 250 V dc.

volts=230 c=10mf a=??

2045

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Is Transol transformer oil comparable to nynas nytro libra?

3112

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How the setting of the vector surge relay shall be calculated when the relay is to be used for Grid islanding application?

2268

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how can tell us the AC indoor or outdoor which Tr and formulls

1770

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2192

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static chagre

2167

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What does quality factor depend on in resonance?

1099

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How generating electric power export to grid from the generating station ?

1884

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quantizer means?

1953

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What is meant by impedance? difference between high & low impedance ?

2062

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Dear Mr B C pal...Can you plz. put some light on principle of operation of Z-Ct in conjunction to its use with 1Cx1000Sqmm HT Cables & Directional Ground Fault / Over Voltage Relays...Regd..Parag v K 9899115632

2764

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what may the reason for vector shift in a generator?

1877

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Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

2226

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How to resolve if Diesel generator stop while running ?

3114

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How many types of protection relays are there based on the characteristic?

1099

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