VB-12 Indoor high voltage vacuum circuit breaker independently developed by our company is the leading domestic level of a new generation of 12kV vacuum circuit breaker, Its main feature is that the main circuit is installed in the full sealed three-phase insulating cylinder the operation mechanism and the main circuit was of before and after layout The operating mechanism is new- type spring one, which is independently researched and developed by my company, has the advantages of simple structure, reliable action, and manufacturing experience for launching tens of thousands of the products, used and referenced by a number of domestic high-end vacuum circuit breaker manufacturers.
a) Airtemperature: Maximumtemperature: +40℃; Minimumtemperature:-25℃
b) Humidity: Monthly average humidity 95%; Daily average humidity 90%.
c) Altitude above sea level: Maximum installation altitude: 2500m
d) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e) Nofrequent violent shake
Note: For short circuit breaking current & rated currentis optionalby clients.
Rated f requency
630, … 4000A
1min Power f requency withstand voltage
Lightning impulse withstand voltage
Rated short circuit breaking current (peak)
Rated short breaking current
Rated short circuit making current (peak)
Rated cable(line) charging breaking current
50 and 10
Rated single capacitor bank switching current
Rated withstand current (peak)
Short time withstand current (4s)
Every technical parameter is completely complied with GB1984、GB/ T11022 ,China power Industry standard DL 403, at the same time also meet the standard,IEC62271-100 IEC56 and the
related standard provisions of other major industrialized countries.
Security of operation
VB-12 Indoor high voltage vacuum circuit breaker owns perfect mechanical & electrical interlocking device, it is also with high operation reliability and service life, matching with the suitable switchgear to complete safe distribution function, ensure the safety of the operator and the equipment.
VB-12 Indoor high voltage vacuum circuit breaker can be widely used in Power plant, power network, metallurgical, petrochemical, city infrastructure such as airports, buildings, subway project.
VD4-40.5 series of indoor high voltage vacuum circuit breaker in the distribution system can be applied to the control and protection of cables, overhead transmission line, transformer, motor, generator,and capacitor bank
VB-12 Indoor high voltage vacuum circuit breaker has passed the following tests to ensure the security of operation.
·Type tests: power frequency withstand voltage, lightning impulse withstand voltage,temperature rise, short time and peak withstand current, short circuit current switching capability and current switching test of cable charging.
·Factory routine test: The mechanical performance test, the main circuit power frequency withstand voltage test, auxiliary and control circuit insulation performance test, the main loop resistance test, interlock operation test, mechanical and electrical operation test.