non sds?
- Thread starter justin
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Ed MacLaren
Senior Member
Re: non sds?
justin,
If it has a "two-winding" transformer (not an auto-transformer) in it, it is an SDS.
There is some good information at this website -Teal Resources
They have some other power quality related application notes. Click on "Application Notes" on the menu to the left.
Ed
[ April 13, 2004, 08:01 AM: Message edited by: Ed MacLaren ]
justin,
If it has a "two-winding" transformer (not an auto-transformer) in it, it is an SDS.
There is some good information at this website -Teal Resources
They have some other power quality related application notes. Click on "Application Notes" on the menu to the left.
Ed
[ April 13, 2004, 08:01 AM: Message edited by: Ed MacLaren ]
Re: non sds?
Justin, this is a difficult question to answer. The UPS may or may not be SDS. Need more info to help you.
It depends on many factors. If it is plugged into a recept, it is not SDS. If it is a dual conversion type, it may or may not be SDS.
Your best bet will be to look in the installation instructions. If it requires a GEC connection, it is SDS. Some manufactures even make it optional.
As a general rule, units larger than 7.2 KVA are SDS. Units less than 7.2 KVA may or may not be SDS
[ April 13, 2004, 09:08 AM: Message edited by: dereckbc ]
Justin, this is a difficult question to answer. The UPS may or may not be SDS. Need more info to help you.
It depends on many factors. If it is plugged into a recept, it is not SDS. If it is a dual conversion type, it may or may not be SDS.
Your best bet will be to look in the installation instructions. If it requires a GEC connection, it is SDS. Some manufactures even make it optional.
As a general rule, units larger than 7.2 KVA are SDS. Units less than 7.2 KVA may or may not be SDS
[ April 13, 2004, 09:08 AM: Message edited by: dereckbc ]
Re: non sds?
The article stated by Ed, is very good. However it does not address a separately derived system.
The NEC does not address a separately derived source. The sources for an AC separately derived system are listed in the definition.
A UPS should be treated as a UPS. A generator as a generator. A transformer as a transformer.
The article stated by Ed, is very good. However it does not address a separately derived system.
The NEC does not address a separately derived source. The sources for an AC separately derived system are listed in the definition.
A UPS should be treated as a UPS. A generator as a generator. A transformer as a transformer.
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