Answer Posted / amar shah

Lighting aresster(Surge arrester) is used for protction of
elctrical equipments(i.e. Transformer, Circuit
breaker...etc) against lighting strok. it is available in
two type. Gap less Arrester (i.e. Zno arrester) & with Gap
Arrester (in air). when its maximum continues operating
voltage exceeds it will get shorted(Non linear
charactersitc) and the lighting strok passes through it o
earth, without damaging the equipment next to it.

what is meant by moulded case circuit breaker ?

2174

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defination of lines

1994

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what is meant by neutral compensation factor and where it is used

1903

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2825

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Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.

2209

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1953

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Draw a block diagramof Three UPS systems connected in Parallel mode?

2149

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1578

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What the difference between ac and dc inductor an capacitor

2426

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3310

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2846

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1125

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1775

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- two pumps must work with them at the same time but if the first pump start the second pump  must delayed for some time to start  also , with motor rated power = 90 KW and rated voltage = 380 V and rated power factor = 0.85 lag please draw the power and control circuit for it and determine all circuit components parameters that you use it

2740

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what is the condition for YnD11

2546

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