×
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

11kV Switchgear Two tier (high) v/s one tier (high) construction

thread238-436275

11kV Switchgear Two tier (high) v/s one tier (high) construction

11kV Switchgear Two tier (high) v/s one tier (high) construction

(OP)
We are replacing the existing 40 years old 11kV switchgear with a new switchgear. This is the switchgear is the main switchboard in this offshore facility. It is supplying very important loads in the facility. I am not terming the loads as critical loads, as critical loads require UPS or DG Supply as back up!

The existing old switchgear is single tier (One high, in the North American parlance). The consultant is recommending two tier (Two high) arrangement for the new switchgear. This selection would result in increased number of spare feeders for the future use.

Barring the increased number of spare feeders, there was no other criteria.

I am of the view that for the important application like this, the two tier switchgear should not be used. It would be difficult to perform inspection and maintenance. More risk exposure of working personnel to the high voltage. Cable termination will be difficult etc.

I would appreciate if someone could analyze the pros and cons of two tier switchgear.

RE: 11kV Switchgear Two tier (high) v/s one tier (high) construction

Metal clad switchgear or metal enclosed switchgear?
Vacuum breakers or disconnect switches and fuses?
What kind of inspections are you thinking become more difficult?

RE: 11kV Switchgear Two tier (high) v/s one tier (high) construction

It's very common - at least in the US. Things get a little tighter, but I don't see the other concerns you're worried about. A breaker lift/hoist will be required, even with one-high construction.

Have you looked at two-high switchgear? If you've got a lot of space and money, nothing wrong with the one-high concept, of course.

RE: 11kV Switchgear Two tier (high) v/s one tier (high) construction

Of greater concern to me would be draw-out versus fixed-pattern. I'd take draw-out every time. Our 2-high draw-out stuff is maintainable without undue effort.

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
Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close