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 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 |
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. | 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 |
