27.5kV and 55kV Insulator Type 2-pole Vacuum Circuit Breakers (VCBs)
Key attributes
| Brand | Wone Store |
| Model NO. | 27.5kV and 55kV Insulator Type 2-pole Vacuum Circuit Breakers (VCBs) |
| Rated voltage | 55kV |
| Rated normal current | 2500A |
| Rated frequency | 50/60Hz |
| Series | ZW |
Product descriptions from the supplier
Description
Our 27.5kV and 55kV Insulator Type 2-pole Vacuum Circuit Breakers (VCBs) combine reliable vacuum interruption tech with a durable insulator-type structure, ideal for high-voltage scenarios like railway traction networks, industrial power distribution, and grid substations. The 2-pole design ensures synchronized circuit breaking to avoid phase imbalance, while the insulator-type build resists extreme temps (-40°C to high heat) and altitudes up to 3,000m for stable operation. With 31.5kA short-circuit breaking current, 2500A rated current, and 3-6 year maintenance cycles, these VCBs meet IEC 62271-100/GB 1984 standards—offering eco-friendly options (like dry air insulation) and easy retrofitting for seamless integration into existing systems.
Product Features
Meidensha has been supplying VCBs for electric railways in China since 1980s, based on our rich experience and expertise in Japan for power systems for electric railways including the Shinkansen. In 2007 and 2011, Meidensha developed new 55 kV and 27.5 kV insulator type VCBs for high-speed railways in China. Since these products are reliable, compact and easy to handle, some 800 VCBs are in service today.
Long operational life with 30 times of rated short-circuit current breaking and 10,000 times of mechanical operatiion
Designed to operate in various environments for the ambient temperature of -40°C to 40°C and the altitude of up to 3,000 m (up to 3,600 m under special conditions)
Optional CTs for mounting on the stand, reducing the installation space and costs
Low-pressure insulating gas (SF6) inside the live circuit compartment. The VCB performance can be maintained even if the pressure decreases to the atmospheric pressure.
Specifications
Rated voltage (kV) |
55 |
27.5 |
Rated current (A) |
2000 |
2500 |
Rated short circuit breaker current (kA) |
31.5 |
31.5 |
Insulating medium |
SF6 gas |
|
Applicable standards |
IEC62271-100, GB-1984, TB/T2803, JB/T6463 |
|
Ambient temperature |
-40°C - 40°C |
|
Altitude |
3,000 m or less |
|
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