Product Overview
Outdoor 40.5kV Outdoor Vacuum Circuit Breaker from a Reliable Manufacturer and Factory Supplier
The ZW7-40.5 vacuum outdoor circuit breaker is designed to safeguard against faults in 40.5kV outdoor power distribution installations. The outdoor-rated insulation, use of the vacuum interrupter and durable mechanism provide clean operation and minimal maintenance in utility, industrial and renewable energy applications.
Applications & circuit protection
This outdoor circuit breaker is perfect for use in substation yards, pole-mounted installations, and places that require protection from weather effects.
- Substation yards: Protection for 40.5kV lines and transformers.
- Outdoor electric distribution: Protection for lines in exposed locations.
- Industrial plants: Reliable outdoor circuit protection.
- Utility networks: Extension and reconstruction of electrical networks.
Construction & operating reliability
The usage of outdoor insulation, corrosion resistant construction and a vacuum interrupter ensures reliability in harsh conditions.
- Vacuum interrupters are used for clean extinguishing of arc.
- Outdoor insulation withstand of 95 kV in dry and 80 kV in wet conditions.
- Ratings range between 1250A and 2000A.
- Rated breaking capacity from 20 kA to 31.5kA.
- Durable mechanism for outdoor use.
Technical Parameter
| Parameter | Value |
| Rated voltage | 40.5 kV |
| Rated frequency | 50 Hz |
| Rated current | 1250 / 1600 / 2000 A |
| Rated short-circuit breaking current | 20 / 25 / 31.5 kA |
| Rated peak making current | 50 / 63 / 80 kA |
| Power-frequency withstand (1 min) | 95 kV dry / 80 kV wet |
| Lightning impulse withstand | 185 kV |
| Mechanical life | 10,000 operations or more |
| Standard | IEC 62271 / GB 1984 |
Circuit Breaker Price & Factory Quote
The prices of electrical breakers are dependent on their rated voltage, capacity and operation. Being a manufacturer, we provide outdoor vacuum circuit breakers at factory prices and in terms for wholesaler buyers and projects.
- Standard models quoted directly from factory price list
- Custom mechanisms or CT options can be added in price list separately
- Pricing for shipments is based on order volume
Breaker Wiring & Control Connection
Power terminals connect the breaker to the electrical circuit, while control terminals allow commands to be submitted for the closing/opening of the circuit as well as for the operation of auxiliary contacts. The Outdoor Vacuum Circuit Breaker is delivered with the wiring diagrams and the terminal identification marks.
- Main terminals indicated on diagram
- Control circuit installed and tested
- Auxiliary contacts installed and tested
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
Electric utility providers and wholesalers in Southeast Asia, Middle Eastern nations, African countries, Latin American states and South Asia receive the form of the Outdoor Vacuum Circuit Breaker based on the requirements of the end users.
Breaker Dimensions, Weight & Packing
Capacity and weight of circuit breakers depend on the voltage class and type of operation. Outdoor pole-mounted circuit breakers are both small in size and lightweight for easy installation. Indoor units come fully assembled for installation in a panel board. The dimensions and weight are to be verified based on the confirmed design drawings.
- Dimensions based on design drawing
- Mechanism locked and poles secured for transportation
- Accessories for installation included
Standards & certifications
ZW7-40.5 is produced as per IEC 62271 and GB 1984, and the type-testing documents can be provided for approval by utilities and projects.
- Standard specifications: IEC 62271/GB 1984.
- Vacuum interrupter technology is used.
- Outdoor insulation level has been validated.
- Breaking performance has been tested at rated voltages.
OEM & B2B supply support
Subian Electric is recognized as an accomplished manufacturer and supplier of outdoor vacuum circuit breakers for different types of services.
If you would like to have devices with particular specifications, please let us know.
- We offer you samples of the products for inspection.
- You can take advantage of any quantities whenever you want to purchase the equipment.
- We may provide you with customized markings and packages.
- We are ready to provide you with technical documentation.
Frequently Asked Questions
What is the ZW7-40.5 used for?
The ZW7-40.5 device has a purpose of safeguarding the distribution circuits of voltage 40.5kV, protecting them from short-circuit and overload with the maximum current of 2000A and short-circuit to ground of 31.5kA.
Is it suitable for outdoor installation?
This type of equipment is made to be used outdoors and can withstand the weather, as it is made to have insulation classes appropriate for open air applications.
What breaking capacities are available?
The device is available with breaking capacities of 20kA, 25kA and 31.5kA according to short-circuit levels.
Do you supply to utilities?
Yes, we offer our goods to various utilities, organizations working in construction of EPC contracts, different trading companies and original equipment manufacturers from all around the world.
