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12KV 630A Vacuum VCB Circuit Breaker Withdrawable Type

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12KV 630A Vacuum VCB Circuit Breaker Withdrawable Type

Brand Name : KNKONG

Model Number : VS1-12

Certification : CB,ISO,IEC

Place of Origin : China

MOQ : 1

Payment Terms : L/C, T/T, Western Union

Supply Ability : 1000 Unit per month

Delivery Time : 15 working days

Packaging Details : Standard export packaging

Voltage : 12KV

Current : 630A

Breaking current : 25KA

Type : withdrawable

Standard : GB,ISO,IEC

Manufactory : KNKONG

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12KV 630A Vacuum Circuit Breaker VCB VS1 series

Voltage: 12KV

Current: 630A

Breaking current: 25KA

Type: withdrawable

Product overview

VS1-Series embedded pole. vacuum circuit breakers are applicable to 12kV, three-phase AC 50Hz indoor switchgear and can serve as protection and control units for industrial and mining establishment transformer substation equipment. With modular and independent-frame design for their spring operating mechanisms, VS1-Series circuit breakers can operate with KYN28-12(24) mid-set and fixed switchgear. These circuit breakers are subject to both fixed installation and assembly with the truck as a handcart unit

VS1-Series circuit breaker features high stability and high reliability

In terms of mechanisms, VS1-Series vacuum circuit breakers are given special optimization to transmission parts. Modular spring mechanisms have such advantages as convenient maintenance, short power-off maintenance, high versatility of parts, and boast better compatibility with vacuum interrupters which greatly improves the technical parameters and delivers more excellent performance.

Normal service condition

Altitude ≤1000m
Ambient temperature Max +40℃
Min -15℃

Ambient humidity:

Maximum average humidity

 24 hours ≤95%
1 month ≤90%
Maximum water vapor pressure 24 hours ≤2.2kpa
1 month ≤1.8kpa

Technical Parameters

No. Item Unit Parameter
1 Rated voltage KV 12
2 Rated frequency Hz 50/60
3

Rated insulation level

 1min power frequency withstand voltage(r. m. s)

KV

42(phase-to-phase, phase-to-earth)

48(across the isolating distance)
Lighting impulse withstand voltage (peak)

75(phase-to-phase, phase-to-earth)

85(across the isolating distance)

4

Rated current

A

 630 630 1250 1600
1250 1250 1600 2000
2000 2500
2500 3150
4000
5 Rated short-circuit breaking current

KA

 20 25 31.5 40
6 Rated short-time withstand current 20 25 31.5 40
7 Rated short-circuit marking current 50 63 80 100
8 Rated peak withstand current 50 63 80 100
9 Rated duration of short-circuit s 4
10 Rated operating sequence O-0.3s-O/C-180s-O/C
11 Breaking times of rated short-circuit current Times 30/20 times(40KA)
12 Mechanical endurance Ops 20000
13 Rated single capacitor bank breaking current

A

 630
14 Rated back-to-back capacitor bank breaking current 400
15 Double-earth fault breaking current 27.4
16 Allowable maximum contact erosion

mm

 3
17 Clearance between open contacts 10±1
18 Over stroke 3.5±0.5
19 Non-simultaneity of 3-phase opening and closing

ms

 ≤2
20 Bounce duration of contact closing ≤2
21 Average breaking speed (instant breaking 6mm)

m/s

 1.1±0.2
22 Average making speed 0.8±0.2
23 Making time

ms

 ≤100
24 Breaking time ≤50

25

Resistance of each phase main circuit

μ Ω

 630A ≤50
1250A ≤45
1600A~2000A ≤35
≥2500A ≤25
26 Contact breaking bounce amplitude mm ≤2

27

 Rated operating voltage Rated operating voltage(V)AC/DC

V

 24* 110 220
Scope of normal operation voltage Opening:65%-120% rated voltage, in case the voltage is lower than 30% rated voltage, opening operation is not allowed
28 Rated voltage of energy storage motor V AC110/220,DC110/220
29 Energy storage time S ≤15

12KV 630A Vacuum VCB Circuit Breaker Withdrawable Type


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