Overview
This outdoor high-voltage vacuum circuit breaker uses a pillar-type fully enclosed structure with high sealing performance. Vacuum silicone grease is filled between the arc-extinguishing chamber and the insulating cylinder, giving the unit good sealing performance along with anti-aging and high-voltage resistance.
Because the design combines vacuum arc extinguishing with vacuum silicone grease insulation, the breaker achieves good breaking performance with high safety and reliability. It effectively solves the problem of condensation and avoids the defects associated with gas-filled and oil-filled designs.
Key Features
- Pillar-type fully enclosed structure — high sealing performance with the arc-extinguishing chamber and insulating cylinder filled with vacuum silicone grease.
- Good sealing, anti-aging and high-voltage resistance — properties delivered by the vacuum silicone grease insulation system.
- Vacuum arc extinguishing plus vacuum silicone grease insulation — for good breaking performance and high safety and reliability.
- High insulation level with an internal heater — a heater is installed in the box to prevent electrical components from getting damp, so the breaker can operate in high-altitude and low-temperature environments.
- Condensation solved without inflation or oil filling — avoiding the defects that come with gas-filled and oil-filled equipment.
- Long service life and low maintenance workload — supported by the sealed vacuum interrupter design.
- Specially equipped current transformer — with multiple secondary windings, high precision and large capacity.
- Flexible CT mounting — the current transformer can be installed either inside the box or outside the box.
Technical Specifications
| Structure | Pillar-type, fully enclosed |
|---|---|
| Insulation | Vacuum silicone grease between arc-extinguishing chamber and insulating cylinder |
| Arc extinguishing | Vacuum |
| Anti-condensation | Heater installed inside the box |
| Current transformer | Specially equipped, multiple secondary windings, high precision, large capacity |
| CT mounting options | Inside the box or outside the box |
| Environmental capability | High-altitude and low-temperature environments |
| Maintenance | Low maintenance workload |
Applications
- Outdoor distribution networks requiring sealed, low-maintenance switching.
- High-altitude installations and low-temperature environments, where the internal heater prevents components from getting damp.
- Sites where condensation must be avoided without resorting to gas filling or oil filling.
- Installations needing CT measurement and protection, with the current transformer mounted inside or outside the box.
Installation Conditions
- The breaker is an outdoor, pillar-type unit — confirm pole or structure mounting provisions before installation.
- The internal heater requires an auxiliary supply so that it can prevent electrical components from getting damp.
- Decide whether the current transformer is to be installed inside the box or outside the box, as both arrangements are supported.
- Plan for the multiple secondary windings of the dedicated current transformer when wiring measurement and protection circuits.
How to Select
- The system voltage and rated current required for your distribution line.
- Whether the current transformer should be mounted inside or outside the box.
- How many secondary windings the current transformer must provide, and the precision and capacity required.
- The altitude and minimum ambient temperature at the installation site, so the internal heater can be specified appropriately.
- The breaking duty and operating mechanism arrangement needed for your scheme.
FAQ
What type of construction does this outdoor breaker use?
It uses a pillar-type fully enclosed structure with high sealing performance, with vacuum silicone grease filled between the arc-extinguishing chamber and the insulating cylinder.
How is condensation prevented?
A heater is installed in the box to prevent electrical components from getting damp. This effectively solves the problem of condensation and avoids the defects caused by inflation and oil filling.
Can it be used at high altitude and in low temperatures?
Yes. The breaker has a high insulation level and the internal heater allows it to operate in high-altitude and low-temperature environments.
What kind of current transformer is supplied?
A specially equipped current transformer with multiple secondary windings, high precision and large capacity.
Can the current transformer be mounted outside the breaker box?
Yes. The current transformer can be installed either inside the box or outside the box.
What are the maintenance requirements?
The breaker offers long service life and low maintenance workload, supported by the sealed vacuum interrupter and silicone grease insulation.
What does the vacuum silicone grease contribute?
It provides sealing performance together with anti-aging and high-voltage resistance, and combined with vacuum arc extinguishing it gives the breaker good breaking performance with high safety and reliability.
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