Answer Posted / h.m.r

we cannot operate single phase equipments without neutral.

What are the basic elements used for modeling mechanical translational system?

1096

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Air circuit breaker safety

1399

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1. what is usage for power factor in industries?? 2.why we need to monitor power factor??

8136

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what is v/f control in VFD?

1528

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Distinguish between nuclear power station with thermal power station for initial cost, starting period, cleanliness, and transportation of fuel

2012

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Is single load(eg: three phase motor) having all the components like positive,negative,zero sequence components during fault condition?

1800

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What is thresh hold value of current?

2139

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Write a note on Treatment for electric shock.

1895

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Please tell me in DETAIL about the following 3 types of fuses or recommend me a good power system protection book or a website link ? 1.Dropout Fuse 2.Striker Fuse 3.Empulsive fuse (not sure if its impulsive or explosion fuse , sorry)

2080

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if grounding is notdone at regular intervals for long distance transmission, will the load connected at distribution end receive voltage during negativehalf cycle of the sine wave?

2012

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What is the tipical Online UPS input voltage for 20 KVA load ( 3 Phase or 1 Phase )? Why ? Explain it...?

2630

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how much leakage current is allowed in MC61A L&T make relay?

3635

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How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.

1735

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

787

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why the voltage and current in a long transmission line are called travelling wave?

2201

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