Single phase contactors. Single phase motor starters are not commonly available since this is a rare case and with a little bit of know how a 3 phase motor starter can easily be wired for single phase power. Typically reversing contactors work for three phase motorsby helping reverse the phase of two legs of the 3 phases and include some mechanical interlocking to prevent both forward and reverse contacts from being closed at the same time. Why 3 phase ac instead of single phase. In my experiencesingle phase motor reversal is normally a one time event.
Find your single phase contactor easily amongst the 12 products from the leading brands finder danfoss sensata on directindustry the industry specialist for your professional purchases. Jim pytel 115925 views. The control circuit is typically a lower voltage than the motor voltage. Is this a single phase motor.
Used in larger scale applications a contactor is a switch that can be controlled remotely specifically designed to switch a large amount of electrical power through its contacts. Single phase power is typically reserved for lower power requirements however in some cases powering a small motor with single phase input power is practical. A wide variety of 220v single phase contactor options are available to you such as 3 1 and 2. In the above one phase motor wiring i first connect a 2 pole circuit breaker and after that i connect the supply to motor starter and then i do cont actor coil wiring with normally close push button switch and normally open push button switch and in last i do connection between capacitor.
Contactors full lecture duration. Every 3 phase contactor has 3 poles one for each phase while every single phase contactor has either 1 or 2 poles please see switch terminology. The above diagram is a complete method of single phase motor wiring with circuit breaker and contactor. Single phase reversing contactor wiring diagram.
Three ways to run a three phase motor on single phase. 3 phase motor with single phase power supply motor.