Vacuum interrupter for ZN12-40.5KV high-voltage circuit breaker, 35KV vacuum tube with aluminum fittings

The ZN23 ZN12-40.5 35KV indoor fixed/withdrawable high-voltage vacuum circuit breaker is a type of indoor high-voltage switching equipment with a rated voltage of 40.5kV and three-phase AC 50Hz. It is mainly used in power transmission and distribution systems such as industrial and mining enterprises and substations as control and protection switches, and is especially suitable for industries requiring frequent operations such as metallurgy and electric arc steelmaking.

This circuit breaker has a simple structure and strong breaking capacity. It adopts a modular operating mechanism and modular design, with long service life and excellent breaking performance. It can be configured as a withdrawable type, suitable for switchgear models such as JYN1, GBC, XGN17-40.5 and others. Its operating mechanism is a spring energy-storage type, supporting AC, DC energy-storage operation or manual operation.

The mechanism and arc extinguishing chamber system of this circuit breaker are designed as an integrated unit, with a reasonable and concise overall layout. The electrical components adopt a modular design, which is easy to disassemble and replace damaged ones. It uses a modular spring energy-storage operating mechanism, the 3AF type spring operating mechanism or the DYT-1 type spring energy-storage mechanism. It can be operated with AC or DC energy storage, and can also be operated manually. The energy storage structure is a worm gear structure, and its energy storage time does not exceed 15 seconds.

The vacuum arc extinguishing chamber has a porcelain structure and adopts longitudinal magnetic field contacts, with low arc energy voltage (20-200V) and low current chopping value (4-15A). The insulators supporting the vacuum arc extinguishing chamber adopt triangular support, with reasonable force and stable structure.

The operating environment conditions include: the ambient air temperature ranges from a maximum of +40℃ to a minimum of -10℃ (-25℃ in cold regions), altitude ≤1000m, daily average relative humidity ≤95%, monthly average relative humidity ≤90%, seismic intensity not exceeding 8 degrees, and it is not suitable for places with flammable, explosive, chemical corrosion and severe vibration.

The main technical parameters include: rated voltage 40.5kV, rated current covering 630A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A and others, rated short-circuit breaking current 25kA, 31.5kA, rated short-circuit making current (peak value) 63kA, 80kA, rated short-time withstand current (4S) 25kA, 31.5kA, rated lightning impulse withstand voltage (peak value) 185kV, rated short-time power frequency withstand voltage (1min) 95kV, mechanical life 10000 times or 30000 times, rated short-circuit current breaking times 20 times, closing time 50~85ms, opening time 40~85ms, rated power of energy storage motor 275W, energy storage time ≤15s.

There are multiple phase-to-phase distances such as 350mm, 400mm, 460mm to adapt to different types of switchgear, such as XGN17-40.5, JYN1-40.5, KYN10-40.5 and others. In addition, the circuit breaker has a long service life, its mechanical life meets the M2 grade standard, and its electrical life meets the E2 grade standard. It has the ability to break inductive and capacitive loads, is suitable for a variety of mainstream switchgears, can also be used alone, and is interchangeable with domestic similar products.

The ZN12-40.5 circuit breaker integrates multiple key technologies, the core of which is the vacuum arc extinguishing chamber, spring energy-storage operating mechanism and integrated structural design, which jointly ensure the high breaking capacity, long service life and reliability of the circuit breaker.

This circuit breaker adopts longitudinal magnetic field contacts and a porcelain-structured vacuum arc extinguishing chamber, with the characteristics of small size, uniform diffusion arc current generated during breaking on the contact layout, low arc energy voltage (20-200V) and low current chopping value (4-15A), strong breaking capacity and long electrical life.

The circuit breaker adopts a spring energy-storage operating mechanism, which uses a dual-purpose motor for AC and DC energy-storage operation, and can also be used for manual operation. It has the characteristics of short energy storage time (≤15 seconds) and low noise, and the mechanism and arc extinguishing chamber system adopt an integrated design with compact structure.

ZN12-40.5/630-25, ZN12-40.5/630-31.5, ZN12-40.5/630A-31.5KA.

ZN12-40.5/1250-25, ZN12-40.5/1250-31.5, ZN12-40.5/1250A-31.5KA.

ZN12-40.5/1600-25, ZN12-40.5/1600-31.5, ZN12-40.5/1600-31.5KA.

ZN12-40.5/2000-31.5, ZN12-40.5/2500-31.5, ZN12-40.5/2500A-31.5KA.

Switchgear models such as 17-40.5, JYN1-40.5, KYN10-40.5 can be conveniently matched for use.