The output end of the reducer of the motor high voltage switch drives the rotating pointer and the ball indicator on the upper end of the rotating pointer. The shaft on the lower end of the shaft seat is provided with the umbrella gear, and the umbrella gear drive on the controlled device of the umbrella gear drives the The lower part of the control device housing is provided with a motor control relay for controlling the operation of the motor. The utility model can meet the requirements of digital control, has the advantages of simple structure, compact arrangement, simplified mechanical components, reduced production cost, good use effect, long service life and safe use.
When the motor high voltage switch is in use, it belongs to a high voltage switchgear, which is mainly used for the motor control device. In the process of making the motor, the motor is mainly composed of a motor, a rotation pointer, a control device shell, and a limit reed switch. A shaft seat is arranged in the middle of the housing of the control device. The shaft of the shaft seat is provided with a shaft, the motor is fixed on the motor support seat, the shaft on the upper end of the shaft seat is provided with a gear, and the shaft of the gear is driven at the upper end. The input of the reducer.
In the process of selecting the switch, the motor firstly considers the power of the motor to a certain extent. How much power is used during operation, and the switch that can withstand the power of the motor must be used when it is used, and should also be considered. Leave room! Because the power of the motor is just turned on, its power is much greater than the power when the speed is stable, so this can not be ignored!
In the process of selecting the motor high voltage switch, if 2.2KW is equal to 11A, a switch of 15A can be selected, and the three-phase motor is calculated at twice the power, which is equal to 4.4A, and a switch of 10A can be selected. According to this purchase, you can rest assured that use. In addition, since the housing of the motor is often grounded, it is not necessary to purchase a switch with a leakage function when the switch is purchased, because a switch with a leakage function sometimes causes malfunction and increases unnecessary troubles.
Principles to follow when selecting high voltage switches for motors
1. Determine the long delay action current setting value of the circuit breaker according to the rated current of the motor.
2. The circuit breaker's 6 times longer delay action current setting return time is longer than the actual start time of the motor.
3. Instantaneous operating current setting value of the circuit breaker: The cage motor should be rated for 8 to 15 times the tripping current; the winding motor should be 3 to 6 times the tripping rated current.