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.
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.