Solid State DC Overloads

[questEE]

I am looking for a DC solidstate Overload for an application which drives a 76 FLA 125 VDC 10 HP motor. So far I have not been able to find a DC solidstate overload for DC power circuits. Does any body manufactures this?. Can only find solidstate overloads for AC applications but not for DC.
Help.

 

[jbartos]

Suggestion: If you apply a dc drive, the overload protection comes with it. Else, you may design it over a shunt resistor, and dc relay that picks up and opens the contactor, which in turn will turn off the motor.

 

[DanDel]

Check out Utility Relay Co.

http://www.utilityrelay.com/prod02.htm

They make electronic C/B retrofit kits for AC and DC C/Bs.
The DC kits consist of Hall Effect transducers or shunts and LT, ST, Inst, GF, Reverse current, and Rate-of Rise functions, set to actuate a shunt trip. I'm sure they can provide what you need for your system.
We have not used the DC systems, but have used the AC systems for many years with no problems. They are very good at adapting their equipment to your needs. Talk to Helmut Weiher((330) 405-0533 x102) or Drew Binder ((888) 289-2864 x101). Good luck.