×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Blocking Magnet purpose in HV SF6 circuit breaker

Blocking Magnet purpose in HV SF6 circuit breaker

Blocking Magnet purpose in HV SF6 circuit breaker

(OP)
Can anyone explain the purpose of a blocking magnet within a 11kV ABB SF6 circuit breaker, what is it's function. Circuit breaker is motor charged with 1x shunt trip, 1x closing coil and a blocking magnet.

Thanks for your help

RE: Blocking Magnet purpose in HV SF6 circuit breaker

Not only in ABB.
Block magnet or lock magnet, additional coil, is used for block mechanical/handle close of Circuit Breaker.

RE: Blocking Magnet purpose in HV SF6 circuit breaker

Blocking magnet in indoor switchgear is generally for interlocking function such as to prevent withdrawing the breaker when it is in 'ON' condition etc.

RE: Blocking Magnet purpose in HV SF6 circuit breaker

Raghun.
Such type of interlock is mechanical only.
If you need some additional interlocks ( station interlocks for example), you have add block magnet for truck or for earthing switch.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources