Product Overview
Pole-Mounted Outdoor Vacuum Circuit Breaker from a Professional Power Equipment Manufacturer
The outdoor vacuum circuit breaker ZW8-12 gives surety for overpower and short circuit protection with 12 kV distribution lines. It has a rating of 630A, insulation with vacuum arc extinction features that make it suitable for pole-mounted stations, substation feeders, and rural network projects.
Applications & circuit protection
The outdoor breakers have been designed for the de-energizing of outdoor switchgear, such as those used in 12kV feeders.
- The outdoor breakers have been divided into several categories:
- Pole station: modern compact protection on overhead lines.
- Rural distribution: reliable outdoor switching in remote areas.
- Substation feeder: outgoing circuit protection.
- Industrial supply: reliable circuit protection for factories.
Construction & operating reliability
The ZW8-12 merges the concepts of vacuum interruption technology and outdoor insulation with a highly effective mechanism, permitting not only clean interruption, but also a prolonged life span.
- Vacuum interrupter technology ensures arc-free interruption.
- Rated for up to 630A and capable of breaking current up to 20 kA.
- Insulated outdoors: withstand voltage of 42 kV under power frequency.
- Construction using pole-mounted design.
- Mechanical life of 10, 000 operations.
Technical Parameter
| Parameter | Value |
| Rated voltage | 12 kV |
| Rated frequency | 50 Hz |
| Rated current | 630 A |
| Rated short-circuit breaking current | 12.5 / 16 / 20 kA |
| Rated peak withstand current | 50 kA |
| Power-frequency withstand (1 min) | 42 kV |
| Lightning impulse withstand | 75 kV |
| Mechanical life | 10,000 operations |
| Standard | IEC 62271 / GB 1984 |
Breaker Cost & Quotation
We invite you to present a quote for the Outdoor Vacuum Circuit Breaker indicating the rated percentage current, breaking capacity, and quantity. Factory prices along with volume discounts apply to orders by distributor and project.
- Quick estimation for standard ratings
- OEM style branding at no extra cost
- Export packaging included
Breaker Wiring & Control Connection
An input and power terminal connect the circuit breaker into the circuit and control terminals accept the close/open commands and auxiliary contacts. The Outdoor Vacuum Circuit Breaker comes supplied with the wiring diagrams and marking of terminals.
- The primary terminals are marked as per the drawing.
- The control circuit is properly laced and verified.
- The auxiliary contacts are supplied for indication.
Compare Breaker Options
Select the right breaker for your duty:
| Feature | This Breaker | Alternative |
| Voltage | As specified | Other classes available |
| Breaking | Per model | Higher breaking on request |
| Mechanism | Spring / magnetic per model | Manual or motor operation |
| Mounting | Indoor / outdoor per model | Pole or panel mounting |
Export Markets & Country Compatibility
Utilities and distributors throughout Southeast Asia, the Middle East, Africa, Latin America, and South Asia receive the Outdoor Vacuum Circuit Breaker. The ratings, type of operating mechanism used, and certification process for the breaker are specified accordingly based on the destination region.
Breaker Dimensions, Weight & Packing
The dimensions and weight of the circuit breakers are determined by the voltage level and mechanism used for operation. Breakers that are installed on poles and placed outside require smaller sizes and less weight for their installations. The indoor circuit breakers are provided fully assembled for their installation on the panels. The dimensions and weight are included in the orders.
- Dimensions according to model drawings
- Locked mechanisms not exposed to poles during transport
- Include installation accessories
Standards & certifications
Produced in adherence to IEC 62271 and GB 1984, ZW8-12 can provide type-testing documents for the utility’s approval.
- Standard of design is established by IEC 62271 / GB 1984 and all tests are carried out according to vacuum interrupter technology.
- Existing outdoor insulation level has been confirmed.
- Superb operation was tested at specified ratings.
OEM & B2B supply support
Being a proficient manufacturer of power equipment and supplier of products, Subian Electric provides the manufacturers of HVAC equipment (HVAC stands for heating, ventilation, and air conditioning systems) with outdoor vacuum circuit breakers along with relevant samples and technical advice.
If you need any other current ratings, please specify your requirements and we’ll get back to you.
- We have samples available to try.
- We offer adaptable amounts depending on the needs of the utility and project.
- We also provide OEM/ODM solutions.
- We can guarantee custom branding and packaging.
- We offer technical documents and certifications.
Frequently Asked Questions
What is the ZW8-12 used for?
This should ensure the protection of 12kV outdoor distribution lines from overloads and short circuits usually used in substations/ on poles.
What breaking capacities are available?
For a 630A variant, the breaking capacity is available in options – 12.5kA, 16kA and 20kA.
Is it suitable for remote installations?
Yes, since it is compactly designed and has low maintenance vacuum interrupters it can be installed in remote areas and rural distribution networks.
Do you support project supply?
Yes, we offer flexible systems and help utilities, EPC contractors and distributors.
