Why air circuit breaker off due to power failure?

0 Answers  

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in india why we not use frequency above 50 hz for distrubuting power ?

1 Answers  

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What are the protective devices in a DC/AC motor starter?

1 Answers   CTS,

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before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

0 Answers  

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Comparative difference between 33Kv & 66KV for transmitting the load of 7 MW at a distance of 34 Km.

6 Answers   NHPC,

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how to find insulation resistance of a motor(415v) by theoretical formula??

2 Answers  

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What is the use of centrifugal switch in 1phase induction motor? Why is it so called?

2 Answers  

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what is the role of impedance in transformer?based on secondary f.l.current(139 amps) and impedance(4.07) of 415/415v of 100 kva transformer. what is the primary current?

1 Answers  

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What is Primary and Secondary Injection Test of CT and Relay.

2 Answers  

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what type of protection and safety req. in the 220kv substaion and area around the substation

2 Answers  

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On what principle reluctance motors work?

1 Answers  

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We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

1 Answers  

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