Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations Toost on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Generator earthing

Status
Not open for further replies.

sunnyoz

Electrical
Apr 12, 2007
2
Gday all,
New in my posession 2 x 250KVA generators they are to be set up totally independentlly from normal supply with one duty gen and standby gen switched through a 4 pole transfer switch. In OZ und NZ we have a MEN earth system or PME european equivalent. My question should the MEN link be on each generator or on the main switchboard ? I have referred to AS/NZS 3010 Electrical instillation Generator Sets and examples are for interruption to normal supply generator instillations, any help greatly appreciated
Sunnyoz.


 
Replies continue below

Recommended for you

G'day Sunnyoz,
Not sure if your transfer switch gives isolated changeover or a degree of parallel running. If there is a chance of parallel running, I'd advise making your Neutral-Earth connection in the switchboard with restricted-earth fault protection on each of the generator feeders.
If it is a simple changeover situation, then each generator could have its own N-E connection and the REF protection would then be unnecessary.
The aim is to provide only one N-E connection on the system at any one time.
HTH
Pugwash
 
sunnyoz, is this a newly installed units or it is about to be installed? Or are you carrying out revisions?

regards,





"Whenever you are asked if you can do a job, tell them, certainly I can! Then get busy and find out how to do it." Theodore Roosevelt.

 

Gday pugwash,
Thankyou for your reply, the transfer switch is total isolated transfer with a ten second delay on switching.Thanks again have a good one.
Sunny oz
 
Status
Not open for further replies.

Part and Inventory Search

Sponsor