Vacuum Circuit Breaker VBDc-12

Vacuum Circuit Breaker VBDc-12

1.As our No.1 hot saling product,it is our most popular product.
2.It is successful passed CE certification.
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Product Details

The VBD-12 indoor high-voltage vacuum circuit breakers produced by our company are widely used in indoor armored air-insulated switchgears, complying with GB 1984, DL / T 402, GB 311.1, GB 3309, GB / T 11022, GB / T 16927.1, IEC 62271-100 and other standards. Under normal use conditions, as long as it is within the technical parameters of the circuit breaker, it can ensure safe and reliable operation in the power grid of the corresponding voltage level.

VBD-12 vacuum circuit breaker has excellent performance in the occasion of frequent operation or breaking short-circuit current. The circuit breaker fully meets the requirements of automatic reclosing and has extremely high operational reliability and service life.

 

It can be installed in KYN58, KYN28 and other armored middle cabinets.

 

Normal use conditions

■ The ambient temperature is not higher than + 40 ℃ and not lower than -25 ℃ (allow storage and transportation at -30 ℃)

■ Humidity: the average daily relative humidity is not more than 95%, and the saturated water vapor pressure is not more than 2.2kPa. The monthly average air relative humidity is not more than 90%, and the saturated water vapor pressure is not more than 1.8kPa

■ Altitude above sea level: no more than 1000m

■ Earthquake: Earthquake resistance: 0.2g horizontal ground acceleration; 0.1g vertical acceleration simultaneously. Resonance, sine, and beat wave test methods; 5 vibrations, 5 waves each, 2s interval, safety factor is not less than 1.67

 

 

Item

Unit

Value

Rated voltage

kV

12

Rated frequency

Hz

50

Rated power frequency withstand voltage (1 min)

kV

42

Rated lightning impulse withstand voltage (peak)

kV

75

Rated current

A

630

630

630

1250

1250

1250

1250

1250

1600

1600

1600

1600

1600

2000

2000



2000

2500

2500



2500

3150

3150



3150

4000

4000

Rated short circuit breaking current

kA

20

25

31.5

40

50

Rated short time withstand current

20

25

31.5

40

50

Rated peak withstand current

50

63

80

100

125

Rated short circuit closing current (peak)

50

63

80

100

125

Rated dynamic and stable current

50

63

80

100

125

Rated breaking current of single or back to back capacitor bank

A

630/400

Rated short circuit current duration

S

4

Rated short circuit current breaking times

Times

50/30(40kA)

Opening time

ms

≤100/≤15

Rated operating sequence


O-0.3s-CO-180s-CO

Rated operating voltage

V

AC 110/220  DC 110/220

Percent of DC component of rated short-circuit breaking current

%

≤40

Mechanical life

Times

10000

 

 

Mechanical feature parameters of VCB after installation and adjustment

Item

Unit

Value

Contact clearance

mm

9±1

Overtravel of contacts

mm

3.5±0.5

Center distance between poles

mm

210±1.5/275±1.5

Out of simultaneity of CO operations of three poles

ms

2

Contact bouncing duration at closing operation

ms

2

Opening rebound amplitude

mm

2

Average opening speed (contact just open~6mm)

m/s

0.9~1.3

Average closing speed (6mm~ contact just close)

m/s

0.4~0.8

Opening time

ms

20-45

Closing time

ms

25-60

Main circuit resistance

μΩ

630A˂60μΩ

1250A˂45μΩ

1600A~2000A˂35μΩ

2500A~4000A˂25μΩ

Allowed wear thickness of contact

mm

3

 

Technical parameters of operating mechanism

Item

Unit

Value

Rated power of energy storage motor

W

90

Rated voltage of energy storage motor

V

AC 110/220  DC 110/220

Energy storage time

S

˂15

Voltage of closing coil

V

AC 110/220  DC 110/220

Voltage of opening coil

V

AC 110/220  DC 110/220

Current of closing coil

A

1.4(DC220)  2.8(DC110)

Current of opening coil

A

0.7(DC220)  1.4(DC110)


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