ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/18/18 10:41 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
FPE in Germany
by HotLine1. 01/17/18 07:07 PM
VDE 0100 to introduce AFCIs
by LongRunner. 01/17/18 10:32 AM
Fujifilm Recalls Power Adapter Wall Plugs
by Admin. 01/16/18 07:04 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 10 guests, and 14 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
vacuum switches #17815
12/03/02 06:04 AM
12/03/02 06:04 AM
gramps  Offline OP
Joined: Aug 2002
Posts: 112
good morning!

anyone here have any experiences with single-phase vacuum capacitor switches?
specifically, type "vcs-1m" switches made by cooper power systems. i recieved and "invitation to bid" on the replacement of 96 of these switches, at 4 different locations owned by the same customer. i am interested in any advise, tips, or any other info on replacing these things. not sure if i want to bid on the job until i see whats involved with them.
thanks, in advance for any help.. [Linked Image]


Work Gear for Electricians and the Trades
Re: vacuum switches #17816
12/03/02 01:25 PM
12/03/02 01:25 PM
Bjarney  Offline
Joined: Apr 2002
Posts: 2,527
West-Southern Inner-Northeast ...
Looks like the installation is intended for crossarm mounting in medium-voltage overhead distribution, right?

They are not oil-insulated, so that's a plus. Reference: Switches/single.asp

Are the capacitors in an ungrounded-wye arrangement? That their racks are grounded or ungrounded does not generally affect operational safety. To ground or not is usually a matter of prior acceptable design and practice for the local area/specific utility. Of course, see that the vacuum switches are appropriately rated for this duty.

What type of fuse is specified? You may want to request the cutouts be loadbreak-rated specifically for capacitor protection/disconnecting. It’s quite a different game in capacitor {versus inductive-load} switching. To avoid fuse operation on hot-up, you might want to test each can on the ground immediately before sending them up the hand line. Quality control of capacitor production is quite good these days, but internal damage in transit is possible, and closing into a damaged can may be a bit “noisy.”

[This message has been edited by Bjarney (edited 12-03-2002).]

Re: vacuum switches #17817
12/04/02 05:53 AM
12/04/02 05:53 AM
gramps  Offline OP
Joined: Aug 2002
Posts: 112
thanx, bj, for your quick reply. [Linked Image] have raised some questions that i cant answer yet, and i'll begin today looking into this further, with the customer's engineers. i'll post back as soon as i learn more about the job in question.
thanks again!

anyone else have some insight on this project?



2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman


Member Spotlight
Levittown, PA
Posts: 810
Joined: April 2004
Show All Member Profiles 
Top Posters(30 Days)
Admin 20
sparky 18
Potseal 14
Popular Topics(Views)
243,546 Are you busy
180,351 Re: Forum
170,832 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.015s Queries: 14 (0.004s) Memory: 0.9505 MB (Peak: 1.0744 MB) Zlib enabled. Server Time: 2018-01-19 09:57:11 UTC