600A 120/240V 3PH breaker tripping

[JohnKifarkis]

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

 

[don_resqcapt19]

That appears to have an adjustable instantaneous trip setting. Are there any large motors?

 

[hillbilly1]

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.

 

[hillbilly1]

Should have a snap in rating plug like this.

 

[JohnKifarkis]

file:///var/mobile/Library/SMS/Attachments/fc/12/1F42BFCF-9CF9-41F1-A18D-0470A77AC85F/IMG_9298.heic

 

[JohnKifarkis]

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.

There are no rating plug
You thing this is the problem

 

[JohnKifarkis]

That appears to have an adjustable instantaneous trip setting. Are there any large motors?

No large Motore the biggest Moyer is 2 HP

 

[infinity]

There are no rating plug
You thing this is the problem

Can you post a photo of the breaker? The model number you've mentioned should have an instantaneous trip settinng.

 

[don_resqcapt19]

There are no rating plug
You thing this is the problem

If that part number is correct that breaker needs a rating plug to work correctly. Please show us a picture of the actual breaker.

 

[hillbilly1]

There are no rating plug
You thing this is the problem

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.

 

[john Kifarkis]

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.

Thank you so much that was the problem it is ok k ow I call order the plug and every thing is ok