120kV 168kV 204 kV Tank Type Vacuum Circuit Breaker(VCB)
Key attributes
| Brand | ROCKWILL |
| Model NO. | 120kV 168kV 204 kV Tank Type Vacuum Circuit Breaker(VCB) |
| Rated voltage | 204kV |
| Rated normal current | 2000A |
| Rated frequency | 50/60Hz |
| Series | VBO |
Product descriptions from the supplier
Description
The 120kV, 168kV, and 204kV Tank Type Vacuum Circuit Breakers (VCBs) are high-voltage power switching solutions engineered for robust performance across medium-voltage power transmission and distribution networks. Designed with a sealed tank structure (tank type) to encapsulate core components, these VCBs leverage vacuum interrupters for reliable arc extinction, ensuring safe and efficient current interruption in medium-to-high voltage systems.
Ideal for utility substations, industrial power grids, and renewable energy integration projects (such as wind and solar farms), these breakers cover a versatile voltage range to meet diverse grid requirements. Their tank-type design enhances insulation stability and environmental resistance, while vacuum technology eliminates the need for greenhouse gases like SF₆, aligning with global low-carbon initiatives. Whether deployed in harsh outdoor environments or compact indoor substations, they deliver consistent operation, long service life, and reduced lifecycle costs, making them a sustainable choice for modern power infrastructure.
Product Features
Environmentally-friendly and excellent anti-seismic performance circuit breaker.Because a vacuum interrupter (VI) is used in the breaking part, it has an excellent breaking performance and there is no gas decomposition by current breaking. A bushing current transformer (BCT) can be built into the tank. This reduces the footprint space. It does not require the inspection of the breaking part by opening. It can realize the maintenance cost saving. It also reduced the required SF6 gas amount down to about 1/3 compared with that of gas circuit breaker (GCB).
Excellent breaking performance through vacuum insulation of the breaking part
Smaller footprint space by the adoption of built-in bushing CT (BCT)
It can save the maintenance cost since it does not require the inspection of breaking part by opening.
It can realize the life-cycle cost (LCC) reduction by approx. 40% compared with that of GCB
Excellent anti-seismic performance due to the low center of gravity
Environment-friendly type. It could reduce the the SF6 gas amount compared with that of GCB
Specifications
Rated voltage (kV) |
120kV |
168kV |
204kV |
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Rated current (A) |
1200 |
2000 |
1200 |
2000 |
1200 |
2000 |
Rated breaking current (kA) |
31.5 |
31.5 |
40 |
31.5 |
40 |
|
Rated opening time (s) |
0.06 (5 cycles) |
0.037 |
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Rated interrupting time (cycles) |
5/3 |
3 |
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Operating duty |
A (O - 1 min - CO - 3 min - CO), B (CO - 15 sec - CO), R (O - 0.35 sec - CO - 1 min - CO) |
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Closing time (s) |
0.13 |
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Rated closure operating voltage (V) |
DC100 |
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Rated motor voltage (V) |
DC100 |
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Insulation medium |
SF6 gas |
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Rated gas pressure (MPa-g) |
0.15 (20℃) |
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Operation system |
Motor-charged spring |
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Applicable standards |
JEC-2300 (1998) |
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