Answer Posted / melwyn

to prevent load(motor)of 3 phase from failing of any one
phase.it is connected to 3phase load,when one of phase is
gets failed(due to burned fuse or contactor problem)this
device senses and it will turn of the system

What is meant by coupling capacitor?

1014

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Is it possible to protect 3phase overload and earth fault of the 3phase system using two CT's.

2056

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how to calculate the mesh earth network resistance in such substation, is there any recommended resistance values with references , thanks!

2277

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how choose conductor&depending upon load

1829

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What are the basic elements used for modeling mechanical translational system?

1060

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can we use ZNyn11 transformer instead of Dyn11 transformer in distribution for effectively eliminating harmonics from the industrial loads.

4953

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What are the uses of lead compensator?

1108

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What is CVT and what is relation with wave trap?

2104

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1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

2101

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what is the chemical name and formula of refrigarent R-134a.

2215

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What is the implications when 600 hp motor is started when the unit is running with Transformer of capacity 1500 KVA and DG set of 1000kva

2153

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what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1879

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Do you need any help with FEWA Electrical Supervisor exams?

949

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An 8 pole, 50 Hz, 3-phase IM is loaded to a poing where pull out torque will occur. The rotor resistance per phase is 0.3 ohm and motor stalls at 650 rpm. The rotor reactance at stand still is A 2 ohm B 1.25 ohm C 3.15 ohm D 2.25 ohm

2209

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1600kva capacity Transformers how the bucholz relay,Oil temperature,winding,surge relay relays setting are to be done

1852

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