Previous in Forum: Short Circuit Strength of Power Transformers   Next in Forum: Rulling Span of Transmission Line
Close

Comments Format:






Change Mode
Close

Subscribe to Discussion:

CR4 allows you to "subscribe" to a discussion
so that you can be notified of new comments to
the discussion via email.

Close

Rating Vote:







Add Vote
4 comments
Rate Comments: Nested
Anonymous Poster #1

Disconnect Contact Finger

03/13/2014 8:47 PM

In the context of breakers, Does anyone knows what a "disconnect contact finger" is and how does it works?
Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".
4
kvsridhar
Guru
India - Member - New Member

Join Date: Sep 2009
Location: Temporarily at Ashburn, VA
Posts: 2744
Good Answers: 164
#1

Re: Disconnect contact finger

03/13/2014 9:41 PM

In withdrawable breakers, there are seconday disconnecting contacts, which are 'off-load' to enable the ACB to be withdrawn for maintenance or other purposes. On one side, there is usually a bar contact while on the other side there are spring-loaded multiple-finger contacts. Here is an example.

__________________
 Nothing worthwhile can ever be taught, it can only be learnt.
Reply Good Answer (Score 4)
No more Good Answers.
PeterT
Guru

Join Date: May 2010
Location: Liverpool, NY
Posts: 961
Good Answers: 131
#2

Re: Disconnect Contact Finger

03/14/2014 10:30 AM

Here are a couple of photos to go along with the illustration you were given. Note that the spring-loaded fingers will mate with a flat bar type of bus contact. An alternative sometimes used is a tubular or cylindrical bus contact, with the finger cluster arranged in a circular configuration ("tulip").

__________________
 To get the right answers, first you need to ask the right questions.
Reply
TonyS
Guru
United Kingdom - Member - New Member

Join Date: Aug 2010
Location: Resting under the Major Oak
Posts: 4347
Good Answers: 181
#3

Re: Disconnect Contact Finger

03/14/2014 10:38 PM

Sorry not a very good advert for rose (tulip) contacts but it shows what they are like.

__________________
 The reports of my death are greatly exaggerated.
Reply
Yusef1
Guru

Join Date: Jun 2006
Location: Ottawa Canada
Posts: 1975
Good Answers: 117
#4
In reply to #3

Re: Disconnect Contact Finger

03/15/2014 10:07 AM

wow! Must have been an exciting lightning strike!

__________________
 If it was easy anybody could do it.
Reply
Reply to Forum Thread
Have a Different Question?
4 comments

Good Answers:

These comments received enough positive votes to make them "good answers".
Copy to Clipboard

Users who posted comments:

kvsridhar (1); PeterT (1); TonyS (1); Yusef1 (1)

Previous in Forum: Short Circuit Strength of Power Transformers   Next in Forum: Rulling Span of Transmission Line

Advertisement

Got Something to Say?
Ask a Question
Start a Discussion

Search this Forum
Electrical Engineering:
Go

CR4 Sections
Aerospace
BioMech & BioMed
Chemical & Material Science
Civil Engineering
Communications & Electronics
Education and Engineering Careers
Electrical Engineering
General Discussion
Instrumentation
Manufacturing
Mechanical Engineering
New Technologies & Research
Software & Programming
Sustainable Engineering
Transportation

Site Directories
Forum Directory
Blog Directory
User Group Directory
RSS Feeds

CR4 Rules of Conduct
CR4 FAQ
Site Glossary

Who's Online (60 right now)
Show Members
Advertisement