To wire a Becker vacuum pump, follow common practices for wiring a 3-phase induction motor with 9 post terminals. <\/p>\n\n\n\n
The most common motor design for industrial pumps uses three phases of alternating current offset from each other by 120 degrees. Each phase is connected to two copper wire windings. As electrical current from the power source flows through the windings, it drives the mechanical rotation of the motor.<\/p>\n\n\n\n
Check the nameplate or tag on the motor to find out the voltage(s) and current that it can handle. Depending on the motor type, the nameplate could show the wiring diagram printed on the motor tag or the schematic could be found inside of the terminal box. This will guide you on the proper way to connect the leads. <\/p>\n\n\n\n
The diagram will show the corresponding configuration for the allowed voltages. On the wiring diagram, you will see three incoming leads labeled L1, L2, and L3. These are the three phases of electricity coming in through wires in the power cable. <\/p>\n\n\n\n
The terminals are typically labeled U1, V1, W1, U2, V2, W2, U5, V5, and W5, and can be found in the terminal box located on the motor. These symbols are given to the 9 wire pin terminals, which serve as connection points between the windings in the motor. <\/p>\n\n\n\n
Becker vacuum pump motors can operate at many voltage options. For example, in North America, we use 208V-230V and 460V+-10%. The windings in the motor can be wired either for high voltage or low voltage. <\/p>\n\n\n\n
Depending on the voltage of the main power, the leads can be wired together in two different configurations: low voltage (called Delta or WYE) or high voltage (called WYE).<\/p>\n\n\n\n