Why is starter necessary for a three-phase induction motor?
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When we use air circuit breaker, it has O/L
protection ,time delay SC protection, Instataneous SC
protection & ground fault protection. They all have some
setting range. But what is the suitable/allowable setting
for the above protection which will be safe for the
For example-O/L protection setting have a range of
Time delay SC protection have a range of
Time delay setting is 0.02,0.1,0.2,0.3,0.4
Instataneous setting is fixed to 20xIn
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This setting are for 2500A ACB.
So what will be the basic allowable setting for the above
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wanted to do certification course but i dont know much
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