rimcanyon
Diamond
- Joined
- Sep 28, 2002
- Location
- Salinas, CA USA
Looking for a wiring diagram for a pair of contactors to support instant motor reverse (i.e. you don't have to press stop first). The diagrams I found from Siemens and Cutler Hammer were for a single reversing contactor, not a pair. This is for a drill press with a three phase motor.
The drill press is currently setup with a pair of 3TB4112 contactors, one of which is bad. The machine is wired with a 220->110 3 phase transfomer, so the coils are 110V, which also supplies the light. The current wiring requires you to press stop before changing direction.
I bought a pair of Siemens 3TB4122 contactors, which are similar to the 3TB4112's except they have several extra contacts, both NC and NO. I think that is exactly what I need to support instant reversing. I could wire the new contactors just like the old ones, but I would like to add the instant reverse functionality.
The drill press is currently setup with a pair of 3TB4112 contactors, one of which is bad. The machine is wired with a 220->110 3 phase transfomer, so the coils are 110V, which also supplies the light. The current wiring requires you to press stop before changing direction.
I bought a pair of Siemens 3TB4122 contactors, which are similar to the 3TB4112's except they have several extra contacts, both NC and NO. I think that is exactly what I need to support instant reversing. I could wire the new contactors just like the old ones, but I would like to add the instant reverse functionality.