Single phase test for switchgear
Single phase test for switchgear
(OP)
I have a question about the single phase test according to ANSI 37.55- 5.9.1.2 chapiter. My test will be make for 50kA short current, 2 sec. and for 130kA peak current, 10 cycles (60Hz).I like to know how to do this test? What about the electrical connection and ground bus size.My ground bus is a cooper cable gauge 4.0 bolted to a cooper plate (2"x 1/4"). The cooper plate is bolted to switchgear floor.
What will be temperature rise of cooper and what is mechanical stress?
Thanks for your help.
What will be temperature rise of cooper and what is mechanical stress?
Thanks for your help.





RE: Single phase test for switchgear
Are you trying verify integrity after installation? A ductor test of the bolted connections andt then a megger test of the assembly should accomplish that.
wbd
RE: Single phase test for switchgear
The purpose of this test is to check mecanical stress of the ground bus and switchgear assembly.It is a ANSI conformance test (type test) for metal-clad switchgear.A megger test of the assembly does not accomplish that. The current for this test must be rated short-time current for switchgear assembly,in my case it is 50kA.I don't know where I should be make short-circuits in the switchgear. Is there someone in the forum who already is done this type of test? Thanks,
RE: Single phase test for switchgear
RE: Single phase test for switchgear
Minor aside... One way to conduct short-interval high-current testing is with a massively braced motor-generator set with requisite flywheel. www.bussmann.com/services/gubany/ Now that’s my idea of superior blood-and-guts entertainment.
I think Ferraz may have a roughly similar arrangement in Europe. [Italy?]
RE: Single phase test for switchgear
Electrical Power Solutions Ltd.
www.e-p-solutions.com
RE: Single phase test for switchgear