why -48 volts dc used in telecommucation

0 Answers  

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Difference between split ac and cassete ac?

1 Answers  

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lightning current is ac or dc..?????

7 Answers  

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what is the diff. btwn. electronic regulator and ordinary rheostat regulator for fans?

3 Answers  

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how can we calculate the reactence of the current transformers?

0 Answers  

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What is the different between earthing & Neutal

3 Answers  

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Why current flows in nutral? As per theory there should be no current in 3 ph explain.

11 Answers   Bhel,

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how to calculate current when LT supply 415v fed to HT Motor 6.6kv and 1120kw.

2 Answers  

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by using pump duty, how we will can calculate the motor duty(KW)? is there any standard or formula.

0 Answers   HP,

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If our power factor is lagging then who is in profit? I mean consumer or Supplier!

1 Answers   Sail,

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How to calculate the total number cells required for a particular KVA UPS system?

1 Answers  

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what is data block in plc ? How the values of data block are written and read by hmi ? what is the difference between function and function block ?

0 Answers  

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