bigcanuknaz
New Member
Hi all:
I have burned up 2 contactor blocks for a 22mm pushbutton. Hmmm, I think.. Something must be wrong. Lo and Behold. the contactor blocks are rated at 10 amps AC, but only .5 amps DC. (3000 ops/hr)
We are using this switch to help speed control a cart unloading soil in an organic tomato greenhouse. For safety we press the pushbutton to move, and release to stop. We often do this as often as 20 times per minute (or 1800/hr). The motor is 1 amp, 130 V DC. We are switching the output of a Bodine Electric Company WPM - 2109E1 DC Motor speed control.
Bodine Electric Company WPM - 2109E1 DC Motor Speed Control
What is the best device to use. I have looked for 120VDC (or 130) 1 amp pushbuttons, and not found any (This might be the easiest solution).
I guess I could also use some kind of electronic relay (triac or scr???) and then trigger that relay with a switch. Not sure at all how to do this. I could also use a larger derated ac contactor, but that seems silly. A specific DC rated switch seems smarter.
I could also take apart the speed controller, and change the on/off switch on it (or wire in series) a push button. But I am not sure if powering and unpowering the speed controller that often will break it too...
Thanks for your help.
Norm
I have burned up 2 contactor blocks for a 22mm pushbutton. Hmmm, I think.. Something must be wrong. Lo and Behold. the contactor blocks are rated at 10 amps AC, but only .5 amps DC. (3000 ops/hr)
We are using this switch to help speed control a cart unloading soil in an organic tomato greenhouse. For safety we press the pushbutton to move, and release to stop. We often do this as often as 20 times per minute (or 1800/hr). The motor is 1 amp, 130 V DC. We are switching the output of a Bodine Electric Company WPM - 2109E1 DC Motor speed control.
Bodine Electric Company WPM - 2109E1 DC Motor Speed Control
What is the best device to use. I have looked for 120VDC (or 130) 1 amp pushbuttons, and not found any (This might be the easiest solution).
I guess I could also use some kind of electronic relay (triac or scr???) and then trigger that relay with a switch. Not sure at all how to do this. I could also use a larger derated ac contactor, but that seems silly. A specific DC rated switch seems smarter.
I could also take apart the speed controller, and change the on/off switch on it (or wire in series) a push button. But I am not sure if powering and unpowering the speed controller that often will break it too...
Thanks for your help.
Norm