Transformers - 6.6KV/240-120 - CR4 Discussion Thread

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elect-ok Power-User Join Date: Sep 2008 Location: Jakarta, Indonesia Posts: 104	Transformers - 6.6KV/240-120 09/23/2008 9:17 PM
	I just want to make sure, i am reviewing datasheet, and i see statement transformer 6.6KV/240-120. is it correct that the transformer is delta/delta ? because many system in my country use delta/wye like 20KV/380 Volt. its mean, in secondary phase to neutral = 220 volt. phase to phase = 380 volt. i see in 6.6KV/240-120 datasheet, 120 volt is exactly 240/2. this voltage only happan in delta. because 240/v3 is 138.564 volt. tx
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Epke Guru Join Date: Sep 2007 Location: Japan Posts: 2703 Good Answers: 38	#1 Re: transformer 6.6KV/240-120 09/23/2008 10:48 PM
	Uhm, i think your mixing generators and motor terminology in there, A transformer just has 2 coils and depending on the configuration of the second coil the output will be 240 or 120Volt, i suspect the watts will be different depending on what configuration you will use __________________ From the Movie "The Big Lebowski" Don't pee on the carpet man!
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North of 60 Guru Join Date: Mar 2007 Location: Iqaluit, NU. Canada Posts: 1854 Good Answers: 140	#2 Re: transformer 6.6KV/240-120 09/24/2008 7:56 AM
	Sounds like your data sheet indicates a single phase transformer. The secondary side sounds like a center tapped 240 volt single phase winding, giving you in essence two 120 volt windings in series. __________________ Joe Contractor to Electrical Inspector, "What do you mean you are going to make me follow the code?".
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wareagle Guru Join Date: Jun 2008 Location: Alabama Posts: 1605 Good Answers: 63	#3 Re: transformer 6.6KV/240-120 09/24/2008 10:22 AM
	Sounds like you have the wrong transformer.
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djacob Commentator Join Date: Oct 2007 Location: Caribbean Posts: 79 Good Answers: 2	#4 Re: Transformers - 6.6KV/240-120 09/25/2008 11:41 AM
	Elect-OK, We have many transfromers 6.6KV/240-120. Primary side is delta, the transformer is really a 6900V transformer whixch can be used in star on a 12KV distribution line. The secondary is 240 center tapped to give 120V. Small factories and commercial building will use secondary in start to give 240 between phase and neutral and 415 v between phases. Some distribution pole monted transformer banks do used seconday in delta to give 240 between phases and 120 V between two phases ( red and yellow) and neutral. The blue phasee to neutral is 200V. 380V is an european power supply. __________________ Learn more, Do more , Be more
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PWSlack Guru 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: 31998 Good Answers: 837	#5 Re: Transformers - 6.6KV/240-120 09/17/2024 7:00 AM
	A simple phone call to the origin of the <...datasheet...> is highly recommended. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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djacob (1); Epke (1); North of 60 (1); PWSlack (1); wareagle (1)

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Transformers - 6.6KV/240-120