why holding contact is not using in VCB and ACB breakers?

1 Answers   Cethar,

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why there is a phase shift lies between primary and secondary voltages of a transformer?

7 Answers   Mecon,

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Form fator is the ratio of?

5 Answers  

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there are 3 transformers each of 1500 kva and one transformer of 1000kva for a 11 floor building . total otgoing kw is 4066 kw. i need an extra 260 kw .is there any provision for that? what is the max kw that can be connected with these transformers?

2 Answers  

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can we use HPSV LAMP in HPMV LAMP fixture ?and viseversa.

5 Answers   OPS,

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What is generator

1 Answers   Mytrah Energy,

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Can RCD's used to protect the VVVF drive if not why.

0 Answers  

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how many types of grounding?

7 Answers  

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in a live circuit with a light bulb such that the bulb is off by a switch, is the light glows if the switch 2 terminals are both touched by a mouse?

1 Answers  

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I did oil BDV test of 1600 KVA trafo 20KV/400V as per IEC 156. Result is 1) 58 KV 2) 58 KV 3)40 KV 4) 50 KV 5) 58 KV 6) 18 KV. Avr is 47 KV. Can we say oil is still ok even in the 6th test BDV is 18 KV ?

1 Answers  

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Classify milling machines.

0 Answers   Ashok Leyland,

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WHAT IS THE DIFFERANCE BETWEEN IP54 AND IP55

2 Answers  

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