Indoor Vacuum Circuit Breaker

VS1-12 Indoor Vacuum Circuit Breaker 12kv VCB for Medium Voltage switchgear indoor type

VS1-12 indoor vacuum circuit breaker is designed for three-phase AC 50Hz power systems with rated voltage from 3.6kV to 12kV. It is mainly used for control and protection in industrial and mining enterprises, power plants, substations, and is especially suitable for frequent operation occasions.

With perfect mechanical and electrical interlocking, it can match all mainstream medium voltage switchgears. It is widely used in chemical industry, metallurgy, manufacturing, real estate, hospitals, transportation, subway and high-speed rail projects.

Product Features

Adopt composite insulation structure and integrated spring operating mechanism.
Stable electrical and mechanical performance, long service life.
Can be used as fixed type or equipped with cart to become handcart type.
Strong compatibility, matches all mainstream 12kV switchgears.
Compact structure, small size, light weight, easy for installation and maintenance.
Perfect interlock device ensures safe operation and prevents misoperation.

Technical Parameters

No.	Item	Unit	Value
1	Rated Voltage	kV	12
2	Rated Frequency	Hz	50/60
3	1min Power Frequency Withstand Voltage	kV	42
4	Lightning Impulse Withstand Voltage	kV	75
5	Rated Current	A	630, 1250, 1600, 2000, 2500, 3150
6	Rated Short-circuit Breaking Current	kA	20, 25, 31.5, 40
7	Rated Short-time Withstand Current (4s)	kA	20, 25, 31.5, 40
8	Rated Peak Withstand Current	kA	50, 63, 80, 100
9	Opening Time	ms	20–50
10	Closing Time	ms	35–70
11	Mechanical Life	times	10000
12	Control Voltage	V	AC110/220, DC110/220

1.Ambient Temperature: No more than + 40℃ and no less than – 15℃.Average temperature is no more than +35℃ within 24 hours. 2.Altitude: No more than 1000m. 3.Relative Humidity: the average daily value is no more than 95%, the average monthly value is no more than 90%. 4.Earthquake Intensity: No more than 8 degrees. 5.Vapor pressure: average daily value is no more than 2.2kPa, average monthly value is no more than 1.8kPa. 6.Installation locations without fire, explosion danger, serious pollution, chemical corrosion and violent vibration.

Normal Operating Conditions

Ambient Temperature: -15℃ ~ +40℃, average ≤35℃ in 24h
Altitude: ≤ 1000m
Relative Humidity: daily average ≤95%, monthly average ≤90%
Earthquake Intensity: ≤ 8 degrees
Installation site: no fire, explosion, corrosion, dust or vibration

Application

VS1-12 vacuum circuit breaker is widely used in power plants, industrial and mining enterprises, petrochemical, metallurgy, infrastructure, residential districts, hospitals, transportation, subway, high-speed rail and other medium voltage power distribution systems.

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