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Sadanand Jadaye
Active Contributor

Join Date: Nov 2008
Posts: 13

Electrical Engineering

06/29/2011 4:00 AM

We have a 2000 KVA, 22 KV/433 V transformer. The LT is connected to a distribution panel with ACB as a main breaker. The load on this panel is about 800 KW. Now there is new Distribution panel with ACB and 800 KW load which is about 100 meters away from the first panel. Can I connect the O/P of the transformer to two different distribution panels, from safety & Indian Electricity Rules point of view?
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Vinodh
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Join Date: Jul 2010
Posts: 32
#1

Re: Electrical Engineering

06/29/2011 7:02 AM

No... as per CEIG rules, it is not acceptable.You can provide a panel with one Incomer with ACB and two outgoing feeders to meet 800kW loads separately with SFU.(switching fuse unit).
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electricalexpert65
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Join Date: Oct 2009
Posts: 2061
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#2
In reply to #1

Re: Electrical Engineering

06/29/2011 7:42 AM

800kW Load and you advise SFU? That's about 1400A. Where will you get an SFU for this rating? The highest rated SFU is 800A. Obviously the OP must go for an ACB.
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Vinodh
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Posts: 32
#3

Re: Electrical Engineering

06/29/2011 8:32 AM

Yes....sorry....mistaken 800kW as 800A and opted for SFU. ACB should be used.
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wareagle
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United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#4

Re: Electrical Engineering

06/29/2011 1:34 PM

I am not familiar with your code rules. Could you install two panels with protection at the secondary of the transformer and connect both distribution panels?
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PSB
Active Contributor

Join Date: Jun 2011
Posts: 10
#5

Re: Electrical Engineering

06/30/2011 12:47 AM

In this application if you are placing breaker 100M away from trafo & if fault occcurs in cable you will be not able to save transformer. secondly as per fire & safery rules for any transformer breaker panel should be provided at nearest distance. solution to this will be ---considering Existing Breaker 2500A & busbar rating of 2500A then couple additional Breaker panel to existing panel and from that breaker take the cable to your new panel.
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electricalexpert65 (1); PSB (1); Vinodh (2); wareagle (1)

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