I have an old GE Limit Amp, 4160 MCC with 500HP motors tied to it. The gear was installed in the mid 70's as I understand. We have a loud humming sound comming from the gear.
What is suspect is the M1 coil.
It has also been said that the control circuitry was DC at one time. With that being...
I have a soft water modification project where we have 4 soft water regen tanks. Each of these tanks has 5 control valves (diaphram type). I am wanting to control these valves with a pneumatic solenoid valve. Here lies the beast, does anybody make a solenoid valve with 5 solenoids, and 5...