Description

Indoor vacuum circuit breaker with 35kv rated voltage. Vacuum circuit breaker uses convenient, mechanical life about 20000 times. VCB breaker is applicable in occasions with frequent operations, acting to protect and control line.

Features:

Vacuum circuit breaker with ideal contact material and shape, ensuring low current carrying value and stable contact resistance.
Integrated design of main conductive circuit made of compound isolation material and operating mechanism.
VCB circuit breaker with few components and parts, compact and logical structure, assuring more reliable and safer operation.
Compact design enables the breaker to be installed within almost all switchgears.
Superior cost performance, vcb breaker is the ideal choice for engineering programs.

Parameter List: (Parameters can be customized)

Model	ATO-VCB-35
Rated voltage	35 kV
Maximum operating voltage	35 kV
Rated current	630A/1000A/1250A	1250A/1600A/2000A/2500A	1250A/1600A/2000A/3150A	2000A/2500A/3150A
Rated short circuit breaking current	20kA/25kA	31.5kA	40kA	50kA
Rated short circuit closing current	50kA/63kA	80kA	100kA	125kA
Rated peak withstand current	50kA/63kA	80kA	100kA	125kA
4S Rated short-time withstand current	20kA/25kA	31.5kA	40kA	50kA
Rated insulation level	power frequency withstand voltage（rated open circuit before and later）: 42 kV
impulse withstand voltage（rated open circuit before and later）: 75 kV
Mechanical life	20000 times
Rated closing voltage of operating mechanism (DC)	110 V, 220 V
Rated switching voltage of operating mechanism (DC)	110 V, 220 V
Contactor torque	11±1
Exceed range(the compress length of contact spring)	4±0.5
Max.bouncing duration	≤ 2
Average opening speed	≤ 0.05
Average closing speed	≤ 0.08
Opening time	≤ 50
Closing time	≤ 100
Accumulative allowable wear thickness of dynamic and static contacts	3 mm
Certification	CE
Warranty	12 months

Dimensions: (Unit: mm)

Schematic Diagram:

Details

Tips: VCB Working Principle

When the circuit breaks due to any reason, the moving contacts move away from the fixed contact and this produces an arc between the contacts.

When the contacts separate, they release metallic vapor that fills in the space. The vapors have positive ions from the contacts’ materials. The vapors help in the elimination of the arc. The rate of vapor release depends upon the rate of current. When the current starts to decrease, the level of vapors also decreases. Gradually the current decreases to zero, and so does the rate of vapors. This causes the medium to recover its dielectric strength.

When the current voltage is high, the arc is condensed in a small region. This leads to swift vaporization of the surface. Interruption is possible when the arc is in the diffusion phase. After the arc finally breaks, the dielectric strength increases rapidly.