ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
Why cables look like they do
by LongRunner. 04/26/17 09:36 AM
Dimmable LED 2x4 lay in fixtures
by HotLine1. 04/24/17 05:43 PM
Old decora style outlets
by Lostazhell. 04/22/17 07:59 PM
Permit Snafus...AHJs and Contractors Jump in
by gfretwell. 04/22/17 01:11 PM
How do you find a good employee?
by HotLine1. 04/22/17 10:44 AM
New in the Gallery:
SE cable question
Popular Topics(Views)
234,782 Are you busy
169,548 Re: Forum
162,819 Need opinion
Who's Online Now
0 registered members (), 59 guests, and 7 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#30943 - 11/03/03 06:40 PM 400 HZ MG set  
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
Does anybody have schematics for a Westinghouse 75KVA 120/208 V 400HZ MG set or know where to get them. I have contacted CH service with no luck, although they are helping in tech support. (nice people)

The unit is probably 30 years old and was running on Thursday at 480 volts. It was moved to another state on Friday and reconnected on Saturday at 240V delta. (voltage was changed on motor and control transformer) Motor runs fine but cannot generate voltage.

There are some PC boards in the unit with one point connected directly to the #7 lead from motor. Obviously this has changed the voltage on this conductor but not sure what it does. (I think it has something to do with the DC excitation conversion)

Thanks

Roger


Work Gear for Electricians and the Trades

#30944 - 11/03/03 09:02 PM Re: 400 HZ MG set  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI
Do any of these links help you:
http://www.teco-wmc.com/contact.html
http://www.siemenswestinghouse.com/en/index.cfm

According to the WHOIS listing for westinghouse.com, the contact information is:

Westinghouse Electric Company
4350 Northern Pike
Monroeville, PA 15146

I don't know if they are the same Westinghouse folks you are trying to locate.

[This message has been edited by ThinkGood (edited 11-03-2003).]


#30945 - 11/03/03 09:04 PM Re: 400 HZ MG set  
Bjarney  Offline
Moderator
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
It could be that the generator lost residual magnetism and needs field flashing. Some sets have an automatic means for doing this on startup that may not be working properly.

Be very careful—400Hz circuits will give you a nasty poke.



Member Spotlight
RH1
RH1
California
Posts: 22
Joined: August 2009
Show All Member Profiles 
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 14 (0.003s) Memory: 0.7519 MB (Peak: 0.8741 MB) Zlib enabled. Server Time: 2017-04-27 07:15:22 UTC