The wiring formula of 380V motor is as follows: 2.5 plus 3, 4 plus 4; Add 6, 25, 5 after 6; 120 conductor with 100? It shows that the formula is suitable for the wiring of three-phase 380 volt motor.

The conductor is an aluminum core insulated wire (or plastic wire) laid through the pipe. "2.5 plus 3" means that 2.5 square millimeters of aluminum core insulated conductor is laid through the pipe, which can be equipped with a "2.5 plus 3" kilowatt motor, that is, a motor with a maximum of 5.5 kilowatts can be equipped.

Y connection:

The load leads of Y-shaped connection are three-phase wires, a neutral wire and a ground wire. The voltage between three-phase wires is 380 volts, and the voltage of any one phase wire to neutral wire or ground wire is 220 volts. ..

Three-phase ammeter There are three types of three-phase ammeter: mechanical ammeter, ordinary electronic ammeter and magnetic card electronic ammeter. General specifications are: 1.5(6), 5(20), 10(40), 15(60), 20(80) and 30 (65438).

Note: the load of electric meter can meet the use requirements by matching the inductance coils with different transformation ratios. For example, if the distribution inductance coil of an electric meter with the specification of 3x 1(2)A is used, and the transformation ratio of the inductance coil is 1: 50, then the maximum rated current that can be carried by each phase is 100A.