ZN93 vacuum circuit breaker is a company on the basis of extensive and in-depth market research, combined with domestic and foreign advanced experience, technology and products developed by the design of a new generation of medium voltage vacuum circuit breaker element products, products using the optimization design of vacuum arcing chamber and solid insulation technology, with modular organization operation control, simple structure, easy to use, easy to maintain. Products can be installed in 550mm, 80omm, 10oomm in the middle of the switch cabinet, interface size and industry mainstream products consistent, completely interchangeable. <br> ZN93 vacuum circuit breaker is a new type of indoor switching equipment, which is mainly used in three-phase AC power system with rated voltage of 12kV and rated frequency of 50-6oHz. It has the advantages of compact structure, high reliability, low operating vibration and easy maintenance. It can be widely used in power plant, steel mill, metallurgy, petrochemical, transportation, building and other industrial and mining enterprises. As the protection of high voltage motor,transformer,line fault load switch equipment.

Product features

1.Take differentfunctional units as the dividing line to achieve full modular design
2.The integrated and optimized design minimizes the intermediate realization link lof the functional unit, and the overall mechanism has only more than 70 parts
3.There is no adjustment process, which minimizes the professional requirements for maintenance personnel
4.The whole series of products are easy to operate
5. Small vibration of mechanical operation
6. The mechanism has a manual energy storage handle
7.Fast replacement of wearing parts without special tools
8. The whole series of institutions through 72 hours of salt spray test verification

Operating mechanism accessory


Fully modular construction
The fully modular structure design makes the overall functional structure of ZN93 circuit breaker clear, easy operation and maintenance, and reliable operation. The modular parts can be quickly replaced without affecting product characteristics.

1. The motor;
2. Open and close trip coil;
3.Overcurrent trip coil;
4. Latching trip coil Secondary control unitfor easy maintenance;
5. Energy storage position control switch;
6. Open and close position auxiliary switch;
7.Secondary control module;
8.Equipped with operating handle, easy operation, more humanized.

Our design is more to consider the user's use and maintenance of convenient, fast, for vulnerable parts such as open and close electromagnet, motor, overcurrent tripping electromagnet and other components, can achieve very convenient and rapid replacement, more humanized.

Simple and reliable structure

1. Less interlocking parts, convenientintegrated installation, effectively prevent false closing;
2. Brake using friction structure, wear, failure rate is small,so as to improve the mechanical life.

Main technical parameters

①Forced cold air is required for 4000A ② Rated short-circuit breaking current 40kA or 50kA mechanical life is 200o0 times​​​​​​​