ZW8-12F(G) Outdoor High-Voltage Vacuum Circuit Breaker (Intelligent Type)

The ZW8-12F(G) outdoor high-voltage vacuum circuit breaker is engineered to handle unpredictable loads and harsh climates. As a core component of 12kV power distribution systems, it combines vacuum interruption technology with an optional permanent magnetic actuator, offering long-term reliability with minimal maintenance.

Unlike conventional SF6 models, the ZW8-12F(G) requires no gas handling, making it an ideal choice for substations, mining sites, rural grids, and smart automation projects where environmental safety and operational simplicity are essential.

Core Features and Technical Advantages

Vacuum Interruption: Fast arc extinction with minimal contact wear.
Optional Permanent Magnetic Actuator: Provides longer mechanical life and maintenance-free operation.
Compact Outdoor Design: Suitable for pole-mounted installations in extreme environments.
Integrated CT and Protection Functions: Supports automation upgrades and smart grid system integration.

ZW8-12F(G) Outdoor High-Voltage Vacuum Circuit Breaker (Intelligent Type)

Technical Specifications

No.	Item	Unit	Parameter
1	Rated Voltage	kV	12
2	Rated Insulation Level - 1min Power Frequency Withstand Voltage (Phase-to-Phase, Phase-to-Ground)	kV	42
2.1	Rated Insulation Level - 1min Power Frequency Withstand Voltage (Across Gap)	kV	48
2.2	Rated Insulation Level - Lightning Impulse Withstand Voltage (Phase-to-Phase, Phase-to-Ground)	kV	75
2.3	Rated Insulation Level - Lightning Impulse Withstand Voltage (Across Gap)	kV	85
3	Rated Frequency	Hz	50
4	Secondary Circuit 1min Power Frequency Withstand Voltage	kV	2
5	Rated Current	A	630, 1250
6	Rated Short-Circuit Breaking Current	kA	20, 25
7	Rated Short-Circuit Making Current (Peak)	kA	50, 63
8	Rated Peak Withstand Current	kA	50, 63
9	Rated Short-Time Withstand Current (4s)	kA	20, 25
10	Rated Short-Circuit Current Breaking Times	Times	30
11	Rated Current Breaking Times	Times	10000
12	Mechanism Life	Times	10000
13	Permissible Contact Wear Thickness	mm	3
14	Weight	kg	170

Typical Application Scenarios

Rural Power Lines: Prevents blackouts due to lightning or overloads.
Mining and Oilfield Substations: Reliable even in dusty or corrosive zones.
Utility Automation Projects: Integrates with smart grids through auto-reclosing logic.
Outdoor Solar Farms: Handles unstable PV input without performance drops.

Why Customers Choose ZW8-12F(G)

Real-world feedback shows this breaker stands out for its durability, ease of installation, and compatibility with SCADA and IoT-based control. Its sealed pole design and integrated protection functions make it a favorite among engineers requiring rugged outdoor switching solutions.

What Customers Are Saying

"Installed on our mountain substation—zero maintenance in 2 years. Great investment." — Mark W., Transmission Supervisor, Alberta, Canada (Source: LinkedIn Reviews)
"The permanent magnet actuator gives us peace of mind. No more spring fatigue." — Trevor M., Distribution Engineer, Queensland Energy (Source: Google Reviews)
"Delivered ahead of schedule. Very easy to commission." — Sean R., Site Contractor, Northern Ireland (Source: Capterra Review Snapshot)
"Handles unstable wind farm loads better than our old SF6 unit." — Emily H., O&M Specialist, Scotland (Source: Electrical Review UK)
"Recommended for all rural upgrades." — Lucas P., Smart Grid Planner, Texas (Source: Google Review)

Frequently Asked Questions (FAQ)

Is the ZW8-12F(G) suitable for high-humidity areas?
Yes. Its sealed construction and vacuum insulation resist moisture ingress and flashovers.
Can it integrate with an auto-recloser system?
Absolutely. The ZW8-12F(G) can be combined with external control units or Remote Terminal Units (RTUs).
What’s the difference between spring and magnetic actuator types?
Magnetic actuators offer a longer life and silent operation, but are slightly costlier.
Does it require periodic maintenance?
Minimal. Only visual inspection and occasional tightening are needed.
Which standards does this model meet?
It complies with IEC 62271-100 and GB 1984 standards for HV switchgear.

Learn More About Our Vacuum Circuit Breakers

Explore other models in our Outdoor Vacuum Circuit Breaker Series to find the right breaker for your environment and budget.

About the Manufacturer Company: Wei Shoe Electric Co., Ltd. As a leading manufacturer of high-voltage distribution equipment, we specialize in outdoor switchgear, vacuum breakers, and automation solutions exported to more than 20 countries. Our facility is ISO9001/14001/45001 certified and has full type test reports available.

ZW8-12F(G) Outdoor High-Voltage Vacuum Circuit Breaker (Intelligent Type)