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              來源:http://www.cekidots.com/ 日期:2022-02-17 發布人:admin

              1、在額定電流上,塑殼式斷路器一般為630A(一些新產品可達到1600A)以下,而智能型萬能式斷路器的額定電流要大很多,一般為630A-6300A。另外在分段能力上,智能型萬能式斷路器要比塑殼式斷路器高。 在實際應用中,800A以上的回路或分段能力要求特別高的回路或需要功能較多的回路應該采用智能型萬能式斷路器,630A以下的回路,一般使用塑殼式斷路器。

              1. In terms of rated current, molded case circuit breakers are generally below 630A (some new products can reach 1600A), while the rated current of intelligent universal circuit breakers is much larger, generally 630a-6300a. In addition, the sectioning capacity of intelligent universal circuit breaker is higher than that of molded case circuit breaker. In practical application, intelligent universal circuit breaker should be used for circuits above 800A or circuits requiring particularly high sectioning capacity or circuits requiring more functions. Molded case circuit breaker is generally used for circuits below 630A.
              2. There are many kinds of molded case circuit breaker products, which are characterized by compact structure, easy operation and simple function. Generally, it is equipped with overcurrent release and instantaneous release, while the intelligent universal circuit breaker has perfect function. Especially with the application of single chip microcomputer technology in recent years, the intelligent universal circuit breaker is developing in the direction of high performance, easy maintenance and networking.
              3. The molded case circuit breaker adopts a plastic structure, which is characterized in that the shell and frame of the circuit breaker are made of plastic, and the contact and arc extinguishing system are placed in the insulating chamber to prevent phase to phase short circuit, ensure that the arc is ejected upward, and ensure the reliable breaking of the contact system. The intelligent universal circuit breaker adopts modular structure, which is divided into frame, contact arc extinguishing system, manual operation mechanism, electric operation mechanism, intelligent controller and drawer base. Each part becomes a complete and independent part, which can be fixed with only 1-2 screws during assembly. It is very convenient for disassembly and assembly, which is conducive to overhaul and maintenance.
              4. All parts of the intelligent universal circuit breaker are installed in an insulated metal frame, which is usually open. It can be equipped with a variety of accessories. It is more convenient to replace contacts and components, and it is mostly used in the main switch at the power end. Over current release includes electromagnetic release, electronic release and intelligent release. The circuit breaker has four sections of protection: long time delay, short time delay, instantaneous and ground fault. The setting value of each protection is adjusted within a certain range according to its shell level. Both manual and electric operation. With the development of microelectronics technology, some intelligent circuit breakers have the function of regional selection and interlocking, which fully ensures the sensitivity and selectivity of action.
              Molded case circuit breaker is that the outer contact of grounding wire terminal, arc extinguishing chamber, release and operating mechanism are all installed in a plastic shell. Generally, maintenance is not considered. It is suitable to be used as the protection switch of branch. There are two types of overcurrent release: electromagnetic type and electronic type. Generally, electromagnetic molded case circuit breaker is a non selective circuit breaker, with only two protection modes of long time delay and instantaneous, The electronic molded case circuit breaker has four protection functions: long time delay, short time delay, instantaneous and grounding fault. Some new products of electronic molded case circuit breakers also have regional selective interlocking function. Most molded case circuit breakers are operated manually, and some are operated with motors.

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