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205 Phase Spacing 25KA Breaking Fixed Circuit Breaker

Categories VCB Circuit Breaker
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: 630-2000A
Breaking current: 20-25KA
Type: Fixed
Phase spacing: 205-310
Brand: KNKONG
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205 Phase Spacing 25KA Breaking Fixed Circuit Breaker

205 Phase Spacing 25KA breaking Fixed Circuit Breaker


Voltage: 12KV

Current: 630-2000A

Breaking current: 20KA

Type: Fixed

Phase spacing: 205-310


Product overview

VS1-Series circuit breaker is independently developed by Knkong based on the advanced design concept; it adopts a modularized mechanism, which is easy for installation, maintenance, testing, and operation. As compared with conventional VS1 circuit breaker. it features higher operation stability, higher safety, and extended service life. The product can satisfy customer's demand for application in 12kv and 24kV power transmission and distribution systems, which is extensively applied in such industries as power, energy, petrochemical engineering, metallurgy, manufacture, traffic, building, and environmental protection as well as large-scale enterprises and national key projects.


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 temperatureMax+40℃
Min-15℃

Ambient humidity:

Maximum average humidity

24 hours ≤95%
1 month ≤90%
Maximum water vapor pressure24 hours ≤2.2kpa
1 month ≤1.8kpa

Solar radiation is negligible. Vibration from the outside of switchgear and control gears is negligible. The ambient air has no obvious pollution of dust smoke, corrosive or combustible gases, steams or smog


Special service condition

Special operating conditions are to be agreed on by the manufacturer and user the manufacturer must be consulted in advance about each special operating condition:

Site altitude over 1000m

- Allow for the reduction in the dielectric strength of the air

- Or plateau type circuit breaker should be ordered, which shall meet

corresponding insulation requirements.

Increased ambient temperature

- Current carrying capacity is reduced

- Provide additional ventilation for heat dissipation

Other considerations should be consulted with the manufacturer according to Section 2.2 in IEC 62271-1


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.


Technical Parameters

No.ItemUnitParameter
1Rated voltageKV12
2Rated frequencyHz50/60
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

63063012501600
1250125016002000
20002500
25003150
4000
5Rated short-circuit breaking current

KA

202531.540
6Rated short-time withstand current202531.540
7Rated short-circuit marking current506380100
8Rated peak withstand current506380100
9Rated duration of short-circuits4
10Rated operating sequenceO-0.3s-O/C-180s-O/C
11Breaking times of rated short-circuit currentTimes30/20 times(40KA)
12Mechanical enduranceOps20000
13Rated single capacitor bank breaking current

A

630
14Rated back-to-back capacitor bank breaking current400
15Double-earth fault breaking current27.4
16Allowable maximum contact erosion

mm

3
17Clearance between open contacts10±1
18Over stroke3.5±0.5
19Non-simultaneity of 3-phase opening and closing

ms


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

m/s


1.1±0.2
22Average making speed0.8±0.2
23Making time

ms


≤100
24Breaking time≤50

25


Resistance of each phase main circuit


μ Ω

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

27

Rated operating voltageRated operating voltage(V)AC/DC

V

24*110220
Scope of normal operation voltageOpening:65%-120% rated voltage, in case the voltage is lower than 30% rated voltage, opening operation is not allowed
28Rated voltage of energy storage motorVAC110/220, DC110/220
29Energy storage timeS≤15

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