1. The electric operating mechanism is an accessory for remote automatic opening and closing of the circuit breaker. The electric operating mechanism has two types: a motor operating mechanism and an electromagnet operating mechanism. The motor operating mechanism is a molded case circuit breaker shell frame level. Rated current 400A and above circuit breakers and universal circuit breakers, electromagnet operating mechanism is suitable for molded case circuit breaker frame rated current 225A and below circuit breakers, regardless of points, when the circuit breaker is operated by a motorized mechanism, it is at the rated control voltage Under any voltage between 85% and 110% of the voltage, the circuit breaker should be able to ensure reliable closing.

2. Energy-releasing electromagnet: This energy-releasing electromagnet is suitable for universal circuit breakers that have a motor pre-energy storage mechanism (the electric energy storage mechanism makes its operating spring mechanism energy storage). When the user presses the button and the solenoid coil is excited, the solenoid is closed to release the energy storage spring and the circuit breaker is closed.

3. Rotating the operating handle is suitable for molded case circuit breakers. A mechanism for rotating the operating handle is installed on the cover of the circuit breaker. The shaft of the handle is installed in its mechanism matching hole. The other end of the shaft passes through the door hole of the drawer and rotates. The handle of the handle is installed on the shaft head exposed on the door of the complete set of equipment, and the round or square seat of the handle is fixed on the door with screws. This installation can prevent the operator from opening the door through the handle of the handle; only the rotating handle The door of the switch panel can only be opened when the switch is opened or closed again. In an emergency, when the circuit breaker is "closed" and the door needs to be opened, press the red release button on the side of the rotating handle seat.

4. Extended handle: It is an external extended handle, which is directly installed on the handle of the circuit breaker. It is generally used for large-capacity circuit breakers of 600A and above for manual opening and closing operations.

5. Handle locking device: It is to install a card on the handle frame, punch a hole on the handle and then lock it with a padlock. It is mainly used when the circuit breaker is in the closed state, and other people are not allowed to open and cause a power outage, or when the circuit on the load side of the circuit breaker needs to be repaired or is not allowed to be energized, to prevent the circuit breaker from being closed by mistake, so as to protect The safety of maintenance personnel or the reliable use of electrical equipment.

6. Wiring method: The circuit breaker wiring method includes front board, back board, plug-in type, and drawer type. If users have no special requirements, they will be supplied in front of the board. The front board wiring is a common wiring method. .

(1) Wiring mode behind the board: The biggest feature of wiring behind the board is that the circuit breaker can be replaced or repaired without rewiring, just disconnect the front-level power supply. Due to the special structure, the product has been equipped with special mounting plates and mounting screws and wiring screws according to the design requirements when leaving the factory. Special attention should be paid to the fact that the reliability of the large-capacity circuit breaker will directly affect the normal use of the circuit breaker, so during installation It must be taken seriously and installed strictly according to the requirements of the manufacturer.
(2) Plug-in wiring: On the installation board of the complete set, first install a circuit breaker installation seat, with 6 plugs on the installation seat, and 6 sockets on the circuit breaker connection board. There are connecting plates on the surface of the mounting base or bolts behind the mounting base, and the mounting base is pre-connected with power cords and load lines. When in use, insert the circuit breaker directly into the mounting base. If the circuit breaker is broken, just dial out the broken one and replace it with a good one. Its replacement time is shorter than the front and back wiring of the board, and it is convenient. A certain amount of manpower is required for plugging and unplugging. Therefore, current plug-in products in our country are limited to a maximum of 400A in the frame current. This saves maintenance and replacement time. When installing the plug-in circuit breaker, check whether the plug of the circuit breaker is tightly pressed, and securely fasten the circuit breaker to reduce contact resistance and improve reliability.
(3) Drawer type wiring: The in and out drawer of the circuit breaker is rotated clockwise or counterclockwise by the rocker. The plug-in structure is adopted in the main circuit and the secondary circuit, and the isolator necessary for the fixed type is omitted. The use of one machine for two purposes improves the economy of use, and at the same time, it is universal for the operation of the circuit breaker and the tool holder, so that the fuse can be directly inserted to supply power in an emergency state.

Since the shunt release, undervoltage release, electric operating mechanism and blocking electromagnet have different voltage levels and different AC and DC power sources, the user shall explain it when ordering, and it is impossible for the user to use a single For accessories, if two circuit breakers are required to be electrically interlocked (when one is closed, the other must be opened), auxiliary contacts and shunt releases or electric operating mechanisms can be selected, and wiring is carried out before and after the board. Certainly.