Square d

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puckman

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ridgewood, n.j.
I have been trying to locate a overload relay from a square d vendor and have gotten nowhere with them . It is a class 9065 type tr 0.4 . It appears to be wired to a ct inside the bucket . Everything inside the bucket is a sg d part , all factory parts in a model 5 mcc.
Gave them fo # and was told its an old unit.
Tryed Schnieder electric.
IF anyone knows where I can locate this part I would appriciate any help.
 
puckman said:
I have been trying to locate a overload relay from a square d vendor and have gotten nowhere with them . It is a class 9065 type tr 0.4 . It appears to be wired to a ct inside the bucket . Everything inside the bucket is a sg d part , all factory parts in a model 5 mcc.
Gave them fo # and was told its an old unit.
Tryed Schnieder electric.
IF anyone knows where I can locate this part I would appriciate any help.
Click to expand...
That specific overload relay is obsolete. They stopped making it almost 10 years ago. There is not an identical form and fit replacement.

You will either need to buy a new style overload with 'lugs in and lugs out' o r replace the entire contactor and overload assembly. In either case the external reset may need to be relocated.
 
Thanks guys for the help in this . I got more help just now then in 2 weeks with Schnedier.
Another question the relay appears to not have work . I has a dial adjustment 0.4 - 0.6
The motor is a 40hp. Would anyone know what 0.4 represents in amps?
Thanks again.
 
puckman said:
Thanks guys for the help in this . I got more help just now then in 2 weeks with Schnedier.
Another question the relay appears to not have work . I has a dial adjustment 0.4 - 0.6
The motor is a 40hp. Would anyone know what 0.4 represents in amps?
Thanks again.
Click to expand...
The numbers represent real amps.

It is likely that your overload relay was/is connected to a current transformer and not directly to the motor. You should be able to functionally replace it with any other 0.4-0.6A relay.
 
puckman said:
Thanks guys for the help in this . I got more help just now then in 2 weeks with Schnedier.
Another question the relay appears to not have work . I has a dial adjustment 0.4 - 0.6
The motor is a 40hp. Would anyone know what 0.4 represents in amps?
Thanks again.
Click to expand...

It represents 0.4A.

You need to determine the FLA of the motor, then determine the CT ratio. Divide the FLA by the CT ratio for your setting. In other words, if they used a 100:1 CT, for every 100A through the CT to the motor, you will get 1A through the OL relay. So if you have a motor that draws 40A FLC, the current setting of the OLR will be 0.4A. If the CT ratio is 100:5, then for every 100A you get 5A, so if your motor pulls 8A you will get 0.4A through the OLR.

Actually, once you determine the FLA and CT ratio, you can replace that OL with any OL relay that gives you a similar range and fits in the space. But if it were me, I would take the opportunity to put in a new Solid State OL relay, they are much more accurate and repeatable. Sq. D makes one called the 9065 Type SS (all of their OLRs start with 9065). Not the best, but much better than what you had.
 
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