Electrical2Go - Online Electrical Supplier
This official sponsor may provide discounts for members

Discuss Mainswitch fuse overheating in the Industrial Electrician Talk area at ElectriciansForums.net

Welcome to ElectriciansForums.net - The American Electrical Advice Forum
Head straight to the main forums to chat by click here:  American Electrical Advice Forum

Hi guys.
I have an ongoing problem with a compressor 166kw variable speed permanent magnet motor. I came across a main Sw fuse upstream from the motor which was extremely how over 100 degrees Celsius and on L 3 which blew fuse. I changed fusecarrier and female recepable whichfuse carrier pins enter to make circuit thinking that possible cause was high resistance at switch . Moving forward a few days same problem has arrised and while I was off site a transformer tripped one day along with the incommer to the main distribution panel feeding the compressor, maybe a coincidence but cause of trip has not been identified either . Also since totally new 400 a main Sw fuse has been installed it still seams to be operating at a high temp and I fear the issue will surface again . Notes to add currents on phases are In the region of 270 to 330 amps per phase I notice a 60 A difference between phases and also the company that supplied the compressor recently changed a stator which has been the only change in layout. I'm going to give the whole system a good going over tomorrow and see can I find any issues . Any advise by members greatly appreciated.
 
  • Thread Starter Thread Starter
  • #3
You must be logged in to see the message.
 

James

-
Mentor
Arms
Supporter
Esteemed
You must be logged in to see the message.
 
  • Thread Starter Thread Starter
  • #9
You must be logged in to see the message.
 

Risteard

-
Arms
Esteemed
You must be logged in to see the message.
 

James

-
Mentor
Arms
Supporter
Esteemed
You must be logged in to see the message.
 
You must be logged in to see the message.
 
You must be logged in to see the message.
 
CK Tools :) The professionals choice when it comes to Electrical Tools
This official sponsor may provide discounts for members

Reply to Mainswitch fuse overheating in the Industrial Electrician Talk area at ElectriciansForums.net

Aico 3000 Range
This official sponsor may provide discounts for members
Top Bottom