Answer / pillay

You are right but the voltage to the LED is reduced by
connecting a resistor in series or a few LED are connected
in series so the voltage across each LED IS about the rated
voltage.

I am an electrical power engineer and arranged power system for a data center, I installed MCB, ELCB and erthing system TN-C-S. But some times several ELCBs Disconnect circuits at the same time! what may be the reason? (the ELCBs are 25A ,30mA)

9 Answers  

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in my industry we are using 3 step up transformers for induction heaters..i.e 415/580v and other are 11/440v.in power consumption does a step trnsformer makes any difference compared to step up?? plz explain

0 Answers  

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what is safety of ups

1 Answers   JLL,

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Sir, how to calculate the voltage drop and short circuit current of cable. please give me example and formulas.

1 Answers  

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) why transformer cannot rotate though the principle behind induction motor is similar to a transformer

3 Answers  

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What is the difference of grounding and earthing?

6 Answers  

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What is the main purpose of relay?

1 Answers  

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design a LV scheme for a 15 storied building?

0 Answers  

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What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.

0 Answers  

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how many earthing should give for transformer body and nuetral

5 Answers   GMR, GOMS,

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if we convert ampers into kwh or mwh ,which one formula use by us,pls tell me?

3 Answers  

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How earth fault & earth leakage equvpment are works?

5 Answers  

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