Outdoor Vacuum Circuit Breaker
Your Leading Outdoor Vacuum Circuit Breaker Supplier
Trust In Grid Co., Ltd. is a professional transformer manufacturer, specializing in the design and production of power transformer, high-voltage switchgear, power distribution equipment, energy storage systems (ESS), magnetic wire, bushing and machining parts. Our power transformers are available in 500KV, 330KV, 220KV, and 110KV models, and are widely used in power utilities, renewable energy systems (solar and wind), industrial facilities, data centers, transportation infrastructure, and OEM applications.
Why Choose Us?
Production Capacity
With 6 factories covering 240,000 m², over 2,000 employees, and 200+ engineers, we support large-scale projects and long-term global supply with more than 30 years of export experience.
Advanced Equipment
We operate a complete set of in-house production equipment, including cutting, winding, CNC machining, vacuum drying, and testing systems, with over 450 machines ensuring stable quality and efficient output.
Quality Control
All products are manufactured and tested in compliance with IEC, IEEE, ANSI, CSA, UL/cUL, CE, and ISO 9001:2015 standards, ensuring reliable performance and smooth international approval.
OEM & ODM Capability
Our engineering team provides OEM/ODM support, including customized design and technical optimization, delivering tailored solutions for utility, industrial, and renewable energy projects.
Technical Specifications of Outdoor Vacuum Circuit Breaker
|
S.Q. |
Item |
Parameter |
|
Rated Voltage |
KV |
12 |
|
Rated Frequency |
Hz |
50 |
|
Rated Current |
A |
630/1250 |
|
Rated Short-Circuit Breaking Current |
KA |
20/25/31.5 |
|
Rated Making Current (Peak) |
KA |
50 |
|
Rated Dynamic Withstand Current (Peak) |
KA |
50 |
|
4s Short-Time Withstand Current |
KA |
20 |
|
Rated Operating Sequence |
|
O-0.3s-CO-180s-CO |
|
Rated Charging Motor Voltage |
V |
AC220 |
|
Maximum/Minimum Charging Motor Voltage |
V |
AC242/187 |
|
Rated Closing Operating Voltage |
V |
AC220 |
|
Maximum/Minimum Closing Operating Voltage |
V |
AC264/143 |
|
Rated Opening Operating Voltage |
V |
AC220 |
|
Maximum/Minimum Opening Operating Voltage |
V |
AC264/143 |
|
Closing Asynchronism |
Ms |
≤2 |
|
Opening Asynchronism |
Ms |
≤2 |
|
SF6 Gas Rated Pressure (Gauge) |
Mpa |
0.01 |
|
Rated Number of Short-Circuit Breaking Operations |
Times |
≥30 |
|
Mechanical Life |
Times |
10000 |
Efficient Arc Extinguishing
The vacuum interrupter inside every breaker allows instantaneous arc quenching. This reduces wear and tear on contacts and protects your system from overheating. Imagine a factory that loses production every time a fault triggers a slower breaker—you wouldn' t want that.
High Voltage Capacity
Whether your system operates at 33kV or higher, these breakers are engineered to handle it. Some models even surpass 126kV, making them suitable for power transmission lines and heavy industrial applications. You can trust them to manage the largest loads without compromising safety.
Weather Resistance
OVCBs are built tough. Rain, snow, heat, or dust—they don' t care. The sealed enclosures prevent moisture ingress, and rust-resistant materials keep them reliable for decades. Picture installing a breaker in a remote desert or a coastal site with high humidity—maintenance becomes nearly worry-free.
Long Service Life & Low Maintenance
With fewer moving parts and high-quality vacuum interrupters, these breakers last 20+ years under normal conditions. Maintenance is straightforward and infrequent, saving you money and downtime. Many clients report over a decade of trouble-free service, which is exactly what you want when managing high-value equipment.
Compact & Lightweight Design
Installation is a breeze. Unlike traditional oil-based outdoor breakers, these units are lighter and more compact, allowing placement in tighter spaces or retrofits where space is limited. Handling during installation is simpler, too.
Fast & Reliable Operation
In milliseconds, an OVCB can cut off current during faults. That' s faster than many conventional breakers. This quick response protects your system and personnel alike—critical for industries where even brief outages can be costly.
Application Scope of Outdoor Vacuum Circuit Breaker
Power Stations
These breakers are used frequently in power generation plants. They control the level of current that flows through the system and protect the system from any faults that may occur. They ensure that the power supply system is stable throughout the duration of its use. Their response is very fast in order not to waste expensive generators or other vital components.
Substations
In substations, outdoor vacuum circuit breakers are widely utilized. They are useful for connecting or disconnecting parts of the grid whenever there is a need. If there is any distraction, these breakers will quickly shut off power to avoid damage. They are also employed during system upgrades and repairs.
Industrial Areas
A constant and reliable supply of power is necessary for large factories and plants. These types of breakers are utilized to safeguard the machines and control systems. They help minimize downtime and ensure that operations run. These devices are usually situated alongside heavy machinery to uphold safety.
Transmission Lines
These types of breakers are situated along the power transmission lines. They control the electricity flow over vast distances. If there is any issue along the block, they will isolate the problem without shutting down the system. This feature enables faster restoration of services.
Renewable Energy Systems
These types of breakers are used to connect wind and solar farms to the grid. They guard the system against overloads and faults from sudden changes in weather or output. They can also be used during maintenance to eliminate the source.
Remote Areas
Outdoor breakers serve their purpose best in rural or remote areas as they are extremely reliable and need very little upkeep. This makes them ideal for places that do not allow for regular maintenance checks. Their design allows for longevity with little servicing.
The Difference Between an Outdoor Vacuum Circuit Breaker (VCB) and an Air Circuit Breaker (ACB)
Voltage Applications
Air circuit breakers are only used in applications where the voltage is less than 690 volts. These are commonly referred to as LT (low tension) applications. On the other hand, vacuum circuit breakers are ideal for medium voltage levels with voltages less than 33 kV.
Working Principle
The moving and stationary contacts are kept open air in a sealed package in an air circuit breaker. Thus, the arc is quenched by air every time the circuit breaker opens. Air circuit breakers are easily ionized because it contains less air, and air acts as the dielectric medium.
However, vacuum acts as the arc quenching medium in a VCB. The ability of a vacuum circuit breaker to break short circuits is pretty impressive since free electrons cannot exist in the presence of a vacuum.
Medium Pressure
Open-air pressure is sufficient to quench the arc in air circuit breakers. On the other hand, VCBs must maintain a vacuum pressure ranging from 10-2 to 10-6 torr.
Refilling
Because outside air is free of charge, ACB does not require manual refilling. On the other hand, there is no way to replenish the vacuum in a VCB automatically. You must replace the vacuum container if it stops functioning.
Application
Air circuit breakers are frequently utilized in the LT MCC, the secondary feeder circuit of the power transformer, and the LT PCC. They are ideal for indoor use; you cannot use them outside.
On the other hand, Vacuum circuit breakers are used to start motors with higher horsepower.
Arc Chute and Arc Development
In air circuit breakers, arc chutes are used to prevent arc formation. It divides the arc into smaller sections. Without an arc chute, ACB cannot function. Arc development is high in ACBs.
Conversely, arc chutes are not required by VCB. Additionally, vacuum circuit breakers have less arc development because there is nothing to ionize other than contact substance.
Customization Options
Material: Customizable
Logo: Customizable.
Structure: Customizable
MOQ: Customizable
Voltage Rating
Make sure the breaker matches or exceeds the system’s maximum voltage.
Current Interrupting Capacity
It should handle potential fault currents safely without damage.
Environmental Conditions
Will it be exposed to extreme weather, dust, or coastal humidity? GOTO’s models account for harsh environments.
Size & Installation
Check available space, and consider whether a compact, lightweight unit would simplify installation.
Maintenance & Cost
Evaluate long-term costs including servicing, downtime, and lifespan.
Ordering Process
Send Us Inquiry → Receive Our Quotation → Negotiate Details → Confirm the Sample → Sign Contract/Deposit → Mass Production →cargo Ready → Balance/Delivery → Further Cooperation
Payment Terms
T.T with 30% downpayment, 70%before shipment.
Paypal or West Union also accept.
Our Service Highlights
Pre-Sales Consultation & Design Support
Early technical engagement to define requirements and deliver optimized solutions.
During Sales & Project Execution
Transparent project management with controlled production, quality tracking, and on-time delivery.
Warranty Advantage
Minimum 2-year warranty on all products, ensuring reliable and risk-free operation.
After-Sales Support
24/7 technical support with fast response, spare parts availability, and training services.
Long-Term Partnership
Lifelong technical support and upgrade guidance for sustained performance.
Packaging & Shipping
Packaging details:
Shockproof foam/moisture-proof film, professional export cartons/wooden crates/pallets.
Final assembly ensures mechanical integrity and readiness for transportation and installation.
Certificates
We're well-known as one of the leading outdoor vacuum circuit breaker manufacturers and suppliers in China, also support customized service. Please feel free to buy high quality outdoor vacuum circuit breaker made in China here from our factory. Contact us for more details.
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