External accessories for circuit breakers

Circuit breakers are important components of electrical equipment and are widely used in many fields. Circuit breakers are divided into high-voltage circuit breakers according to their use range, and low-voltage circuit breakers. The division of high and low voltage lines is relatively vague. Generally, 3kV or more is called high-voltage electrical equipment.

Electric operating mechanism: This is an accessory for remote automatic opening and closing circuit breakers. The electric operating mechanism has two kinds of motor operating mechanism and electromagnet operating mechanism. The motor operating mechanism is a molded case circuit breaker case. Circuit breaker rated rated current 400A and above, electromagnet operating mechanism is suitable for circuit breaker circuit breaker frame rated current 225A and below circuit breakers, whether it is electromagnet or electric motor, their suction and rotation directions are the same, only The position of the cam inside the electric operating mechanism is used to achieve the combination. When the circuit breaker is operated by the motor-driven mechanism, the circuit breaker should be reliably closed at any voltage between 85% and 110% of the rated control voltage.

Rotating the operating handle: suitable for the molded case circuit breaker, the mechanism for rotating the operating handle is mounted on the cover of the circuit breaker, the rotating shaft of the handle is mounted in the matching hole of the mechanism, and the other end of the rotating shaft passes through the door opening of the drawer, and the handle of the rotating The handle is mounted on the shaft head exposed on the door of the complete device, and the circular or square seat of the handle is screwed on the door. This installation enables the operator to rotate clockwise or counterclockwise through the handle of the handle outside the door. Make sure the circuit breaker is closed or opened. At the same time, turning the handle can ensure that the door cannot be opened when the circuit breaker is closed; only the door of the switch board can be opened only when the rotating handle is opened or refastened. In an emergency, when the circuit breaker is "closed" and needs to open the door panel, press the red release button on the side of the handle handle.

Extended handle: It is an external extension handle that is directly mounted on the handle of the circuit breaker. It is generally used on large-capacity circuit breakers of 600A and above for manual opening and closing operations.

Handle locking device: the card is mounted on the handle frame, the handle is punched and then locked with a padlock. Mainly used for the circuit breaker to be closed.

In the working state, no other person may be allowed to open the door to cause a power outage, or the load side circuit of the circuit breaker needs to be repaired or not allowed to be energized to prevent the circuit breaker from being mistakenly closed.