How to connect a 2-way 3-corner type to 12 cores?
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Our company has an 450KW asynchronous motor, and the cable coming out of the motor is a 12-core cable, with wires labeled as W1*2, V1*2, U1*2, W2*2, V2*2, U2*2. Meanwhile, the cables coming out of the cabinet are 4-core cables; we’re not sure why this design was chosen – could it be due to the high power of the motor? So how is the wiring done?
The 12 wires coming from the motor actually correspond to the 6 wires of a three-phase winding; however, due to the high current, each wire is paired with another one in parallel. By connecting them in the sequence U1-V2, V1-W2, W1-U2, a triangular connection is achieved. The incoming wires also consist of 2 pairs of 4-core wires, which are connected in parallel as well, resulting in 3 live wires and 1 PE wire.