The circuit breakers are wired in front of the board, behind the board, plug-in type, and drawer type. If there is no special requirement, the user can supply the board in front of the board. The front panel wiring is a common wiring method.
(1) Post-board wiring method: The biggest feature of the post-board wiring is that the circuit breaker can be replaced or repaired without having to re-wire, and only the front-end power supply must be disconnected. Due to the special structure, the product has been configured with special mounting plates and mounting screws and wiring screws according to the design requirements. It is necessary to pay special attention to the fact that the reliability of the contact of the large-capacity circuit breaker will directly affect the normal use of the circuit breaker. Must pay attention to it and install it strictly according to the requirements of the manufacturer.
(2) Plug-in wiring: On the mounting plate of the complete set, first install a circuit breaker mount, 6 plugs on the mount, and 6 sockets on the circuit breaker's connection plate. There are bolts on the surface of the mount or the mount, and the mount is pre-connected to the power cord and load cable. When in use, plug the circuit breaker directly into the mount. If the circuit breaker is broken, just pull out the bad one and replace it with a good one. Its replacement time is shorter and more convenient than the front panel and the rear panel wiring. It takes a certain amount of manpower to insert and pull. Therefore, at present, China's plug-in products have a frame current limit of up to 400A. This saves maintenance and replacement time. Plug-in circuit breakers should be installed to check whether the plug of the circuit breaker is tightly installed, and the circuit breaker should be securely fastened to reduce contact resistance and improve reliability.
(3) Drawer type wiring: The input and output 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 and two uses, which improves the economics of use, and brings great convenience to operation and maintenance, and increases safety and reliability. In particular, the main circuit contact seat of the drawer seat can be used in common with the NT type circuit breaker seat, so that the fuse can be directly inserted into the power supply in an emergency state.
Conclusion
Due to the shunt release and undervoltage release, the electric operating mechanism and the latching electromagnet have different voltage levels and different power sources for AC and DC. The user will explain when ordering, and the user cannot use a single one when selecting. Accessories, if two circuit breakers need to be electrically interlocked (when one is closed, the other must be opened), then auxiliary contacts and shunt release or electric operating mechanism can be used for wiring in front of and behind the board. Be sure to tighten the screws to avoid burning the circuit breaker.
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