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Mohammad fawad
Member

Join Date: Sep 2008
Location: Afghanistan , Kabul
Posts: 5

TT Earthing System for UPS

05/27/2009 12:03 AM

Dear all hello,

Currently we use tow galaxy PW 120 KVA , UPS as parallel redundant , that we use the TT earthing system for upstream and down stream of UPS , and our load output disteribution panel is approxemitly in distance of 100 Meter , that all know in TT system one point of supply source is connected dieritly to earth ,and in all exposed and externous parts connected to separat earth electrod , if we connect one cable from first earth electrod with separate loud earth electrod , we can like this , and which one is better that the first option separately or connected to each ather just earthing system , plz advice me i am in problem.

Thanks & Regards

Mohammad fawad

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PWSlack
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: TT earthing system for UPS

05/27/2009 3:13 AM

The method of earthing should not affect the performance of the UPS, as the earth conductor is only there to provide a safe path for the fault current until such time as the circuit protective device opens the circuit.

The performance of the UPS is determined by what happens on the phase conductor(s) and any neutral conductor only.

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