Old GE Control CR2942 Start/Stop station

[MrJLH]

Would any one happen to have an original GE wiring diagram for a CR2942-NK-203 Under-voltage time delay push button station.

Apparently these are so old the manufacture doesn't even have wiring diagram.

 

[Jraef]

This guy has one that is pretty close (CR2942NK301), you might be able to ascertain the difference of function by information in the manual for it if he will share that with you.

 

[MrJLH]

This guy has one that is pretty close (CR2942NK301), you might be able to ascertain the difference of function by information in the manual for it if he will share that with you.

Thanks

I actually reached out to him last night but no response.

 

[MrJLH]

So I found an old cut-sheet of this thing. i drew this schematic up to what I think this out in the field. does this make logical sense? The CR coil holds in for 2-4 seconds which in turns hold CR-2 contact to keep the motor starter coil from dropping out.

Thanks

 

[Jraef]

What that appears to be is what's sometimes referred to as a PORT device, PORT meaning Power Outage Ride Through. It holds the coil in for a second or two if there is a brief interruption in line power, for example when a transfer switch changes.

There are companies that sell those capacitor based PORT devices as retrofit items now, but you can also get a pneumatic timer head for a lot of IEC style starters that will accomplish the same thing if it's just that one starter or relay. If you want to hold up an entire control system or ride through sags, you can also use a device called a DySC (Dynamic System Correcter). That company was bought by A-B a couple of years ago, but those are too expensive for just one coil.