ITE CR Frame Switchgear?
ITE CR Frame Switchgear?
(OP)
I've come across an ITE device (switchgear?) labeled CR30. It's a 480V 2000A breaker in an FS-20 switchboard. Seeing as the device is older than I am, I'm having difficulty finding specs and operation on this. Does anyone have information on this device? A little more information... CAT NO. ATI-CR30, w/ Amp-Trap Model A6CRA. Circa 1976-1978.
I'm trying to conduct an arc-flash study. We were unable to remove the panel to inspect the device more closely because I left my bomb suit in Baghdad thinking I wouldn't need it again.
Thanks all!
I'm trying to conduct an arc-flash study. We were unable to remove the panel to inspect the device more closely because I left my bomb suit in Baghdad thinking I wouldn't need it again.
Thanks all!






RE: ITE CR Frame Switchgear?
RE: ITE CR Frame Switchgear?
But you are getting a little luck here. I work for Siemens and have here with me a 1977 Goulds ITE catalog. The CR Series MCCB was a 2000A frame current limiting breaker, but used Amp-Trap fuses inside of it for the current limiting. The entire assumbly was rated for 235kAIC Asym, 200kAIC Sym at 480VAC. The fuses they ALL used were that AT1CR30 and you may be able to go back to Ferraz Shawmut for a fuse curve on that. Unfortunately Goulds did not put the curves in the catalog, and that is all I could find.
RE: ITE CR Frame Switchgear?
Zogzog, I'm using SKM PTW and I need the curves, but I would also like some background operation info on the breaker. I may need to recommend a retrofit if possible.
Thank you both.
RE: ITE CR Frame Switchgear?
RE: ITE CR Frame Switchgear?
The current replacement (if not obsoleted already) would be the Siemens CRD6 series, Cat#CRD63B2000, This would require new mounting hardware aswell. You should also have the client consider replacing the switchboard, as you already are finding out the CR3 frame and fuses are very scare today.
Mike
RE: ITE CR Frame Switchgear?
RE: ITE CR Frame Switchgear?
Here is the curve for the CR frame and fuse (TD4962)
Zogzog, know I know where to get one when needed, Thanks!
Mike
RE: ITE CR Frame Switchgear?