Answer Posted / eng. moaz rabah

MCCB protecting from

1. Short Circuit (SC)
2. Overload (OL)



ACB protects from

1.SC
2.OL
3.Over voltage
4.Under voltage
5.Earthing
6.Reverse Current Flow

imagine u have deffect in the transformer, some short
happened in the primary that means all the 11KV will be
connected to MD designed only for 415v, then the ACB can
obserb that over volt but the MCCB will burn

how to carried out tan delta test in 11 KV alternator ?

3067

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I meggared my 2c*70 sq mm AL AR XLPE cable. its one end show 50 M ohm . is my cable is safe for laying. I have only one phase and neutral.

1875

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write encoder 17 pins details? pin a;b+, pin b;w+,..pin s & t. what is the meaning of b+, w+? explain;

2145

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What is minimum permicible value of leackage current for LT Panle when applying voltage up to 3 KV for 5 Minuits?

2235

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how the inner and outer body is separated in aircrafts?

1088

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What is s-domain and its significance?

1169

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what is integrated ac contact circuit

2068

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What is the difference IN MCCB's between thermal magnetic and electronic tripping system ?

2035

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What happen if 200 KVAR capacitor connected to power continuesly?

2119

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how to calculation increase capacitor,increase power factor for three phase.

2176

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How do we calculate over and under frequency tolerance from generator data?

1605

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Explain what is rated speed?

1131

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What is FM200 Gas??Applications........

2360

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Difference between earthing & grounding.?

2147

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I have a 380 KVA DG set. How can i find out 1. My Fuel Consumption per hr ? 2. Electricity produced in 1 Hr. ? 3. If load varies then how does it affect fuel consumption & electricity produced ? Please HELP !!! Really need an answer.

2615

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