The motor is a 1 hp 3 phase 208 230460 volts and im wiring a 120 vac supply voltage into the vfd which steps that up to 3 phase 230 v. Rated vfd output current not less than motor current in delta connection.
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Wiring a vfd to a 3 phase motor. Set in vfd parameters motor data as follows. If there is a neutral wire in the conduit or cable supplying the motor it is unused for the motors three phase wiring. Motor rated voltage 400 v motor rated frequency 87 hz. This would work but i would not be able to adjust the hz to match the motor. For example use a red wire nut to connect two 12 gauge wires. Variable frequency drive vfd generally its using for controlling speeds of three phase induction motors.
Main circuit wiring the vfd main circuit terminals shown as below figure. Cap it with a wire nut. Hold the bare ends of the conductors together and twist on a wire nut. I have included a picture of the wiring diagram attached to the motor below. Learn the basic wiring of variable frequency drives vfd with our electrician steve quist. Third option would be to run 240v single phase from the panel to a 5kw vfd converting the supply to 240v 3 phase 50 hz then using the transformer change up the supply to 380v 3phase 50hz.
Motor develop constant rated torque from low. In technical its possible to use a variable frequency drive for 1 phase motor speed controls but we have to mention control single phase motor speed by a variable frequency drive may cause overheat of the ac motor as well as the service life. The vfds showed in the video are the d720s 230v single phase and the d720 230v three phase. How to wire a 3 phase motor and vfd duration. In this video we used the very popular mitsubishi d700 series vfd showing single phase and three phase wiring instructions. Vf line comes through rated motor point 230 v 50 hz to maximum point 400 v 87 hz with correct ratio.
Fourth option would be a rotary phase converter. We strongly recommend using a certified electrician to set up your vfds. United states restricted mode. How to wire a 3 phase motor by michael logan updated july 17. 1 the vfds three phase ac input terminals rl1 sl2 tl3 the power lines input terminals connect to 3 phase ac power through line protection or leakage protection breaker it does not need to consider the connection of phase sequence.
Gallery of Wiring A Vfd To A 3 Phase Motor
