Selection Procedure of Different Electrical Switch

Please help.It is very basic for system designing and not available in any book..we have several experts in this group who can help thousand of beginers like us ..Please dont give any reference or irrevalent lecture..Unfortunately it is becoming the fate of this group ...

nela

This is a textbook Rule 75 question with a followup whinge.

The parameters relate to the requisite power supply and demand in a given installation.

Google is your friend, I suggest that you consult him.

If you have no joy there, search the manufacturers websites for data sheets of the devices your interested in.

If that leaves you dazed and confused, then seek the help of a person whom is competant in the field of electrical engineering.

If all that fails, ring John Laws*

Lynlynch can jump in any time now..

The circuit breaker must be capable of breaking the normal maximum operating current expected to supply the load. It must also be capable of withstanding the fault current at that point in the circuit for as long as it is expected the protection will take to clear the fault.

The industry moved away from oil circuit breakers in the sixties to vacuum and then to SF6 and now we are back with vacuum again.

Switch fuse units are generally cheaper than circuit breakers but do not provide the discrimination necessary for protection schemes.

I agree with Tobugrynbak, this is too basic of a question and a decent answer would entail a semester's worth of discourse. This is the kind of thing you learn in Electrical Engineering courses, not in one or two paragraphs in a free forum from anonymous posters.

very usefull question for us those r in LT system design ..please help...

good question..please answer..it will help several beginners like me

akash

Please attend to our training programme on Electrical Design of Switchgear Assembly (EDSA) - wherein we cover all the topics you have asked for and .... much more. Please mail me your mail ID thro this forum's mailbox so that I can send you further details.

another chance of a quick buck EE

We are not operating as profit centres. Why don't you first attemp attending to our courses, before pssing on such "lousy" comments in such professional forums?

And here was I thinking this forum wasn't for promoting one's self interest.

Be realistic your not running a charity.

The very forum is for promotimg one's "self interest" in acquring more knowledge. If this forum is all about sharing knowledge, we do it at a larger scale, in a structured way. Please be reminded that I or we do not have any sort of self interest - whatsoever - in informing the OPs and others about the details of some training courses available on the subjects asked. It is only to make people aware that such training modules are available. We only inform and NOT compel anybody to attend to our training programmes. I wish you desist from making such "silly" business like comments in this forum anymore.

To Electrical expert65 Please mail "selection procedure for different electrical switch" to my address snaban@gmail.com