GDM
New member
Hello from Canada!Hi
I must say that these DIY NVR switches maybe cheap but I would not use in an industrial enviroment, a proper DOL starter is the way to go.
So Neutral to 13, Live to 23 when operated 14 is neutral and 24 live which you know is correct because it works whilst you hold the button in, so the hold in coil is not functioning. One end of this coil is internaly connected to 14 which is a neutral when the switch is operated, the other end A1 needs live to hold in and looking at your diagram this should work. With all the power OFF, and machine isolated check the hold in coil resistance between A1 and terminal 14, that should show a resistance and not be open circuit. It is looking like a faulty switch though.
I'm having the same problem as TU described. I bought four no-voltage-release switches, and when I installed the first one, the load stayed on only if I pressed and held the green switch. I confirmed the wiring is correct. I swapped the switch with the other three switches, and of the four, only one switch worked (which tells me it's not a wiring problem).
I have a theory: Does the line voltage matter? In North America, line voltage is 125 AC. I ordered four 125v switches. But I received 250v switches. I'm now thinking that, for NVR switches, the stated voltage is not the maximum it can handle, but rather the voltage that it needs to operate. If my switches need 250v and are getting only 125v, could this be why they're not latching? If so, it might be a fluke that one of them actually works.
Thoughts? Many thanks in advance for your guidance.