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Participant

Join Date: May 2010
Posts: 1

# High Voltage Switching Procedures

06/25/2011 7:52 AM

Hi People,

Please anyone can help, I need to have procedures of working on MV Middle Voltage of 33 KV and low voltage of 415V, I need procedure of switching ON and OFF as well as safety concern to the people who will enter and work in the Room.

Thank you,

Lazaro.

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Guru

Join Date: Oct 2008
Location: Want to be: 34° 34' 21.60" N, 92° 55' 42.28" W Really am in Arizona
Posts: 37026
#1

### Re: HIGH VOLTAGE SWITCHING PROCEDURES

06/25/2011 9:53 AM

I recommend you start here. High Voltage Electrical Safety Program

415V can kill you dead. 33kV can kill you deader, quicker, if you don't know what you are doing.

Hire a qualified high voltage engineer. The life he saves might just be yours.

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Power-User

Join Date: Nov 2010
Posts: 267
#2

### Re: High Voltage Switching Procedures

06/25/2011 12:02 PM

In connection to the start of this thread. Could anyone explain how different switching techniques for high voltages are (from much lower voltages like 5 to 15 V)? I am guessing that there will be certain effects of using low voltage switching methods on high voltages too, though I got little idea of why - if anyone could explain.

Guru

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4088
#3

### Re: High Voltage Switching Procedures

06/25/2011 3:14 PM

HV & LV procedures are basically the same. Isolate and lock.

Where the difference does occur is earthing arrangements for the conductors if physical contact is going to be made with them. With HV all conductors should be solidly earthed unless a sanction to test is in operation. LV can be tricky, on a long cable run I would earth, a short run I would leave it to the individual doing the job. Bear in mind that a lot of LV work is done LIVE.

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Power-User

Join Date: May 2011
Posts: 110
#4

### Re: High Voltage Switching Procedures

06/25/2011 8:54 PM

Dear Mr.Lazaro,

Pl. use the SEARCH THIS FORUM and enter your topic and click at GO ( on the right side of this page) and you will get the earlier links posted by Cr4 MEMBERS.

If not satisfied with the details, you go further to SEARCH ALL OF CR4 and click at GO. YOU WILL GET MORE DETAILS.

Still if you do not get the details, pl try with different wordings and try.

I JUST GIVE THE DETAILS

 Search this Forum Electrical Engineering: Go

Go
 Search all of CR4 Go

One more option - go to google search engine or some other search engine and you will get the answer..

Good luck.

RAJESWARI

Guru

Join Date: Oct 2009
Location: sometimes Wales,UK.. was Libya, now Oman!
Posts: 1549
#5

### Re: High Voltage Switching Procedures

06/26/2011 1:19 AM

33Kv is usually a supply from your power supplier.

I suggest that you get them to switch it off!!

What work are you doing in the sub-station?

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