Answer Posted / tony

All the answers are actually wrong. MCBs can handle quite a larger current (2-15 times, depending on type) for short period of time so you don't consider inrush current.

Type B: 3-5 times
Type C: 5-10 times
Type D: 10-20 times

The breaker in the distribution box usually is dependent wire gauges. You can adjust the mcb with socket according to load.

Use type C for ac. Only use 1.5 times of the running current. I use 13A for 1.5 ton ac.

in electrical control panel. how can i choose the cable rating. (example - 11kw motor, 18-25A mpcb}

2860

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where is core-type and shell-type construction suitable for transformers ?

2095

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HOW MANY TYPES OF FUSE?

2097

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what is protection class current transformer.

4320

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For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?

1913

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how to minimize earth resistance upto 2Ω, if the resistance is 6 Ω ?

1840

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What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?

1562

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What is the reason that the humming sound is coming from the induction furnace panel?

2603

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star delta starter contorl circuit... drawing..

2093

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where solid grounding and where grounding through ngr done and why?

2583

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What is the normal phase difference between the voltage and the no-load current in a transformer?

1259

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Dear friends I want to design busbar for1600 kva transformer(i.e2100 amps) what are all the factors to be considered before selectinga busbar what are all the standard sizes of busbars what is the formula for finding current of copper and aluminium busbar

1904

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How Self works in DG set

2029

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What are the characteristics of negative feedback?

1069

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how u select control transformer for a mccb panels or any panels?for expample we hav 440 volts maim supply and control volts is 230v?

2171

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