Answer / pillay

Anybody can temper an energy consumed meter if you know how
it works but it is plain cheating. No society condones cheating.

Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?

3 Answers   Meralco,

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When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

0 Answers   TATA,

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What is the fuction of UV & how it works in circut breakers? is it one type of relay?

4 Answers  

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what is the diffrence between capasitor and battery?

2 Answers  

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when the diameter of the core and cable is doubled, the value of capacitance ?

2 Answers  

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What is the arc. I saw word arc in between sf6 & vcb brakers

1 Answers   Cap Gemini,

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What will hapen if we connect more capacitors than required for powerfactor control? Exactly what will be the effect on power system?

2 Answers   Mandovi Pellets,

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is the value of inductance depends upon the evalue of thitha in doubly excited machine?

0 Answers  

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I just purchased a 4 position cam switch to be used to operate a 3-speed blower motor. The motor is a 10 amp motor and has 3 wires that are used to control speed. The cam switch was rated at 660V 20 amps but when I received it, I noticed that it has AC-15 operational current rating (Ie) of 4/5 amps. If I am reading the label correctly. the 4/5 amps is related to 440v/220V (Ue). Other ratings are AC-3: 5.5A, AC2: 7.5A and AC-4: 1.5A. My questions are 1) Is it safe to use this switch with the motor I have 2) what is the difference between the 20 amp Ith ratting and the Ie operational ratings?

0 Answers  

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how to select a circuit breaker?

24 Answers   ABB, BARC, TCS,

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HOW TO CALCULATE THE APFC Panel Design

1 Answers  

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Define the "All - Day Efficiency" of a Transformer

1 Answers   Transco,

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