Answer / guest

over current-a)instantaneous, idld,thermal earth fault,
under votage.

Answer / romeo

in addition, differential relays for current and voltage
are necessities also to monitor considerable leakage of
current and difference in voltage (in case of two leg
switchgear for a make and break design) to a magnitude that
will activate tripping action or prevent closing of the bus
tie.

3ph motor running with unequal kw and different pf what are the reasons

0 Answers   UltraTech,

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What is the selection process of breakers. Can any one please give a formulation on same?

0 Answers   Sterling Wilson,

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how to calculate maximum current

0 Answers   Almeer Technical Services,

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WE ARE PLACE A NEW 75 KW MOTOR FOR JPF.IT IS CONNECTED IN M.C.C. WHEN WE ARE STARTING M.C.C.INCOMER IS TRIPPED.THEN WE ARE CONNECTED IN P.C.C WITH A MM30 RELAY PROTECTION THEN WE ARE STARTED MOTOR WILL RUN SMOOTHLY.

0 Answers  

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What is class 2 coordination ?

2 Answers  

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why we used to transmitt the power at higher voltage why not at lower voltage

8 Answers  

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What is referred to the electron in the outer orbit?

0 Answers  

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What is the minimum permissive IR value for LT & HT motor for safe starting?

1 Answers   Rukmani,

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what is different between grounding and earthings?

4 Answers  

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what material used made for the resistance,for the purpose of zero temperature coefficient?

2 Answers  

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What_is_mean_by_negative_dc_voltage? why we use -48v except +48v in DC power supply systems.

2 Answers   APEL, BSES,

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In my 3 phase 4 wire electrical system N to earth voltage is 0.08 is it ok What is standard for it ?

1 Answers   Kay Bee,

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