VS1-12 VCB Vacuum Circuit Breaker 12KV 2000A
Voltage: 12KV
Current: 2000A
Breaking current: 20KA
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
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
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 |
Operation safety
With anti-maloperation locking protection these circuit breakers,
working in switchgear cabinets, can realize "five-protection"
interlocking functions, avoiding malapert and maximizing the
protection of an operator's personal safety.
Only when the circuit breaker and earthing switch are in the
disconnected position can the truck of circuit breaker be racked to
the service position from the test position
The circuit breaker can be closed only when in the service/test
position.
With the circuit breaker closed its truck cannot be racked in or
racked out which can be realized only when the circuit breaker is
in the disconnected position.
The circuit breaker in a closed position cannot be racked out from
the service position to the test position.
The circuit breaker cannot be closed while it is being racked in.
When the circuit breaker is closed, if the closing signal fails to
be removed timely, the internal anti-trip control circuit will cut
off the closing circuit to prevent multiple reclosing (optional).
If the electric closing lockout is selected, the circuit breaker
will be unable to be closed when the secondary circuit fails to
provide power or the power provided fails to meet the normal
operation of the locking electromagnet(optional).
