Answer / avdhesh

Antipumping Relay : It is generaly used in series of
closing coil of breaker. The function is to cut off the
supply of closing coil immediately after closing of
breaker. This is required as coil is not designed for
continous rating.
Lockout relay : This is also used in closing ckt of
breaker. This is basicaly latched relay which inihibit the
closing of breaker for defined time if relay is operated.
Lockout relay can be self reset or manual reset (choice)
after definite time.

1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

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explain about the electrification in the Indian Railways? ie., how the power is taken and used to drive the train? explain with the block diagram??

1 Answers  

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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.

0 Answers  

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What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

0 Answers  

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how to reduce the co level in your 1000kva dg set side?

1 Answers   Cognizant,

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What is switching over voltage?

1 Answers   MEIL,

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difine electrical ballast in HPSVL

0 Answers  

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pls send me some of the solved question booklet of Junior Engineer -2 (ELE) in RRB

1 Answers   RRB,

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What is application of isolation transformer & How it works.

2 Answers   BARC,

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what is the difference between main meter CT and check meter CT?and what is the difference between main meter PT and check meter PT?

2 Answers   Tesco,

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how can i change the rotation of the AC single phase induction motor and show me by diagram

0 Answers  

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As you achieve greater success with the company after some years, Will you like to be a share holder in our company?

0 Answers   PESPL,

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