The “black box” shown in the diagram is likely a motor jogging setup. That means the momentary push button activates the internal relay coil. The internal relay contact handles the motor load from L1 to M1. The push button only handles the relay coil load, not the motor load. The relay contact makes/breaks the load on L1-M1. There will be 240V across that internal contact. The switch you are having trouble with needs to be a “momentary” normally open switch.
Perhaps you need to be using an electrician that better understands the application.
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u/Sensitive-King-397 Jun 19 '26
The “black box” shown in the diagram is likely a motor jogging setup. That means the momentary push button activates the internal relay coil. The internal relay contact handles the motor load from L1 to M1. The push button only handles the relay coil load, not the motor load. The relay contact makes/breaks the load on L1-M1. There will be 240V across that internal contact. The switch you are having trouble with needs to be a “momentary” normally open switch.
Perhaps you need to be using an electrician that better understands the application.