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600A 120/240V 3PH breaker tripping

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JohnKifarkis

JohnKifarkis

Member
Location
Illinois
Occupation
electric
I purchase new (SGLA36AT0600) breaker it is 600A 120/240V 3PH high leg for gas station use as amain service disconnect,

After 3 day from open the station the breaker start tripping (the load it is 80A) i order new one and replace the existing new 600A breaker we install but same problem happened the breaker type,

any idea why this happen
 
JohnKifarkis

JohnKifarkis

Member
Location
Illinois
Occupation
electric
hillbilly1 said:
Is the rating plug in it? It will work without a rating plug, but will trip at 20-30% of the breakers rating if I remember correctly. Supply houses are bad to sell them without the rating plug installed.
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There are no rating plug
You thing this is the problem
 
J

john Kifarkis

Member
Location
Illinois
Occupation
Electric
hillbilly1 said:
That is your problem. They use a standard frame, and the rating plug sets the ocp. It will set without one, but will trip over a certain percentage of the breaker max rating. The plug is ordered separate from the breaker. Just snaps in.
Click to expand...
Thank you so much that was the problem it is ok k ow I call order the plug and every thing is ok
 
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