Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Register Log in
  • Congratulations waross on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

isoquenser

Status
Not open for further replies.
WoodyM

WoodyM

Electrical
Apr 10, 2008
3
Is anyone familiar with a type of equipment called an isoquenser. This is shown on a12.5 kV schematic of a commercial system. This appears to be a three phase protective device (12.5 kV) used on moderate sized distribution transformer banks and three phase padmounted transformers stepping down from 12.5 kV to 120/240, 120/208 and 277/480 volts. Transformer range sizes range from 3-100 kVA (300 kVA) to 1000 kVA. The age of this device is unknown. Thanks for any assistance.
 
Replies continue below

Recommended for you

Sort by date Sort by votes
An isoquenser is a primary switch. The ones
I've seen were used in place of a main switch required by the NEC.
There was a primary fuse mounted on the switch that was sized for the transformer. This is old technology.
 
Upvote 0 Downvote
Status
Not open for further replies.

Part and Inventory Search

Sponsor

Back
Top Bottom