Why we used 690V in ACS 800 drives.Why dont use standard voltage like 415v or 1.1Kv

0 Answers   India Cements,

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I have an existing old MCCB. ABB Model SACE, the rating are: Ue = 660 volts, Iu =1250 Amps, 3 poles, Ith (max) =800 amps at 45 deg C. I need a circuit breaker for my 3 phase motors, 380 volts 60 hz. the supplier required the minimum ampacity of the breaker to be 911 amps. can i use this breaker with rating of Iu =1250 amps but Ith = 800amps maximum?

0 Answers   Siemens,

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how to find out three phase motr kw with out name plate..

2 Answers  

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How ElCB tripping if Neutral touch with ground

4 Answers   Sanmar,

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Insulater disk using formula for 33/66/135 line h t line

1 Answers   Hofincons, Kirloskar, KPTCL,

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could mail me the question papers for the test.

1 Answers   ONGC,

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Can you used moeller lzm1 mccb in a dc system with 125vdc and 20ka short circuit current , beside is it have 24 or 48 volt shunt ? Beside how long current can through from An MCB shunt contacts? (like Z7-AS 24 V)?

0 Answers  

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For some transformers we are using solid neutral earthing while some others we are using resistance earthing why ?

0 Answers  

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why the name trunking bus PT

0 Answers   Siemens,

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When a capcitor is used on 440 v thenthis is kvar rating 25kvar .my question is that when we use this capcitor  use 480 v &525 volt .how much kvar increase . Plz give my question ans. And give answer with formula .my mail id is rohitashsaini013@gmail.com

1 Answers   Neptune,

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what is an rmu?its circuit diagram.functions

14 Answers   CP Bangladesh, Emrill, NDPL,

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What is the Relation b/w star delta starter , DOL starter and two speed starter. if we want to rotate a 20 kw fan in 2 speeds which type of two speed starter we have 2 use?

1 Answers   ABB,

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