A professional Electric Motor Manufacturer and Supplier in China

A professional Electric Motor Manufacturer and Supplier in China

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What are the signs in the terminal box of the three phase induction motor? What do they mean?

The lead wires of the three phase induction motor are connected to the outlet box for wiring. Therefore, the outlet box is also called the terminal box. The junction box is provided with mutually insulated terminals, and some are also provided with grounding screws.
(l) Winding lead line mark
The first ends of the first phase, the second phase, and the third phase of the Y series three-phase induction motor are U1, V1, and W1, respectively; the tail ends are U2, V2, and W2, respectively.
The first ends of the first phase, the second phase and the third phase of the JO2 old series three-phase induction motor are D1, D2 and D3, respectively; the tail ends are D4, D5 and D6 respectively.
Some three phase induction motors, the internal connection of the windings, only lead to three lines, then their signs: U, V, W in the new series of three phase asynchronous motors, D1, D2, D3 in the old series of three phase asynchronous motors. If there is a fourth lead line marked with N, this is the neutral point of the star-connected winding.
(2) wiring snail logo
It is exactly the same as the mark of the winding, and its mark is marked with a pad, and some is pressed on the insulating base.
(3) Grounding screw logo
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