Connection of a three-phase motor according to the star and triangle scheme

Connection of a three-phase motor according to the scheme of a star and a triangle
The conductive windings of the electric motor are brought into the junction box. The winding leads form two parallel rows, each is labeled with the letter C and numbers from 1 to 6. This is done in order to mark the beginning and end of all three windings. Pins are connected quite difficult. You can find out with a simple tester. Prozvanivaya winding pins, we find that only two of them are connected along a large diagonal. The rest are connected in small diagonals. Ringing of the windings is necessary when using an old electric motor, in the new such work is unlikely to be required. After testing, the engine can be connected either by the “star” scheme or by the “delta” scheme. Note: also used to connect electric motors with a capacity of more than 5 kW combined star-delta circuit.

Star winding on

Star-circuit implies connecting the ends of the windings at one point, which is called the neutral, and supplying the supply voltage to the beginning of each winding. The "triangle" scheme provides for the serial connection of the windings.
Connection of a three-phase motor according to the star and delta scheme
For a star connection, two jumpers (three jumpers are supplied with the electric motor) are installed on the terminals in the same row. Then the jumpers are fixed nuts. The three pins of the second row connect the wires from the three-phase network.
Connection of a three-phase motor according to the scheme of a star and a triangle

Turning on the motor windings by a triangle

The "triangle" circuit is used to connect the electric motor to a single-phase network 220 V. Three jumpers connect the opposite terminals. On one side, the jumpers are fixed with nuts,from the opposite to the two terminals, we connect the wires from the network, to the third - the wire from the working capacitor (the capacitance must be calculated correctly).


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