VCB solid-sealed pole vacuum circuit breaker 2000A 12KV for
transformer substation using
Voltage: 12-24KV
Current: Max 2000A
Breaking current: 20KA
Type: withdrawable/Fixed
Product overview
VS1-series solid-sealed pole vacuum circuit breaker is suitable for
12kV, 24KV, three-phase alternating current frequency of 50, 60Hz
indoor switchgear KYN28-12 (24) central and fixed switchgear
operation together. The VS1 vacuum circuit breaker can be fixedly
installed or combined with a trolley.
Special service condition
The special operating conditions are negotiated in advance by the
manufacturer and the user (the manufacturer must consult the user
in advance for each special operating condition) such as:
-Whether the site altitude exceeds 1000m (or need to order a
prototype circuit breaker).
-Allows reducing the dielectric strength of the air.
-Corresponding insulation requirements.
-Situations where the ambient temperature rises.
-Whether the current carrying capacity is reduced.
-Is it necessary to provide additional ventilation for heat
dissipation
Other precautions should be negotiated with the manufacturer
according to section 2.2 of 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
VS1 vacuum circuit breaker has anti-misoperation lockout
protection, realizes the "five guarantee" interlock function in the
switch cabinet, avoids misoperation, and protects the personal
safety of operators to the greatest extent.
Only when the VS1 vacuum circuit breaker and the grounding switch
are in the off position at the same time, can the trolley roll from
the "detection position" to the "service position".
The VS1 vacuum circuit breaker can only be closed in the
"service/test" position.
When the VS1 vacuum circuit breaker is closed, the trolley cannot
be moved in or out, only when the circuit breaker is in the off
position.
The VS1 vacuum circuit breaker in the closed position cannot be
shaken out from the "service position" to the "detection position".
The circuit breaker cannot be closed when pushed in.
When the circuit breaker is closed, if the closing signal is not
released in time, the internal anti-trip control circuit will cut
off the closing circuit to prevent multiple reclosing (optional).
Note: If the customer chooses electric closing and locking instead
of manual closing and locking, the circuit breaker will not be
closed when the secondary circuit cannot provide power or the power
provided cannot meet the normal operation of the locking
electromagnet (optional).
