tallgirl
Senior Member
- Location
- Great White North
- Occupation
- Controls Systems firmware engineer
Greets,
I could wait until tomorrow morning and contact my sales rep at Graybar, but why when I can ask y'all!
I have a client who is having a very hard time finding a contactor for his solar power system. I had a conference call with him and his electrician today and the electrician insists he can't find a 50A two pole contactor that is normally-closed. I suggested he find a double throw contactor and ignore the normally-open terminals.
The application is as follows --
He has a twin stack of OutBack GVFX 3648 (grid-interactive inverters) that are connected to the main service on their inputs and the input of a critical loads panel on their output. There is a Cutler-Hammer ATS switch the grid out and a 14KW Kohler in when grid power fails. That still leaves the inputs of the inverters connected to the output of the generator. So the plan is to add a 50A contactor at the inverter inputs to keep it from trying to export power to the generator should the battery voltage rise above the "Sell RE Power" voltage.
For some odd reason (I dunno ...) the electrician would rather have the relay normally-closed.
Do any of you know of a part number for something like this, or do I have to go to Graybar in the morning and have me some free coffee?
I could wait until tomorrow morning and contact my sales rep at Graybar, but why when I can ask y'all!
I have a client who is having a very hard time finding a contactor for his solar power system. I had a conference call with him and his electrician today and the electrician insists he can't find a 50A two pole contactor that is normally-closed. I suggested he find a double throw contactor and ignore the normally-open terminals.
The application is as follows --
He has a twin stack of OutBack GVFX 3648 (grid-interactive inverters) that are connected to the main service on their inputs and the input of a critical loads panel on their output. There is a Cutler-Hammer ATS switch the grid out and a 14KW Kohler in when grid power fails. That still leaves the inputs of the inverters connected to the output of the generator. So the plan is to add a 50A contactor at the inverter inputs to keep it from trying to export power to the generator should the battery voltage rise above the "Sell RE Power" voltage.
For some odd reason (I dunno ...) the electrician would rather have the relay normally-closed.
Do any of you know of a part number for something like this, or do I have to go to Graybar in the morning and have me some free coffee?