Product Overview
40.5kV Indoor Vacuum Circuit Breaker from a Professional Power Equipment Manufacturer
The indoor vacuum circuit breaker ZN85-40.5 is designed to provide effective protection of medium-voltage systems of 40.5kV and consists of compact built-in construction and high breaking performance. The absence of maintenance and pollution on the part of the device makes it an fascinating solution for electrical utilities, industrial enterprises and producers of switchgear.
Applications & circuit protection
The indoor circuit breaker is used in 40.5kV electrical distribution and industrial systems that require reliable fault interruption and low service demands.
- Distribution substation: Protection of 40.5kV feeders
- Industries: Protection of large circuits
- Switchgear: Installed in indoor medium voltage panels
- Power plants: Auxiliary protection and medium voltage distribution protection
Construction & operating reliability
The upper-lower integrated design has the interrupter at the top and the mechanism at the bottom, which results in a design that is simple and rational with strong intapositioning.
- The compact and integrated upper-lower design.
- Vacuum interrupter ensures clean extinction of the arc.
- Rated breaking capacities from 20 kA to 31.5 kA.
- Withstand voltage level of 95 kV (power frequency).
- Mechanical life of 10,000 operations and more.
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 |
| Lightning impulse withstand | 185 kV |
| Mechanical life | 10,000 operations |
| Standard | IEC 62271 / GB 1984 |
Breaker Cost & Quotation
Please contact us for an Indoor Vacuum Circuit Breaker quotation with your rated current, breaking capacity and amount. Factory pricing and bulk discounts apply for distributors and project orders.
- Quick and easy quotation for standard ratings
- Zero cost on OEM branding
- Export packing included
Breaker Wiring & Control Connection
The power terminals attach the circuit breaker to the electrical circuit while the control terminals follow the commands given for opening or closing the electric circuit and auxiliary terminals. The circuit breaker has terminal markings and circuit diagrams.
- Output terminals colored correctly
- Controller circuit wired and tested
- Indicator terminals included
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
In Southeast Asia, Middle East, Africa, Latin America and South Asia, the Indoor Vacuum Circuit Breaker is provided to utility companies and distributors. Specifications, mode of operation and certifications are aligned for each market.
Breaker Dimensions, Weight & Packing
The size and weight of the breaker differ according to the operating principle used and voltage level. For instance, outdoor types of circuit breakers are compact and light making their installation easy; while indoor models are provided as ready-made panel mounted units. The size and weight information is given in the order drawings and specifications.
- Size depends on the model drawing
- Mechanism locked and poles protected for transport
- Mounting accessories supplied
Standards & certifications
The ZN85-40.5 product was created in accordance with the specifications of IEC 62271 and GB 1984, and it is possible to obtain technical documentation for the ZN85-40.5 regarding its type tests required for project and company approval.
- The design standard of ZN85-40.5 is IEC 62271/GB 1984.
- It employs vacuum interruption technology.
- Takes insulation up to 40.5kV.
- The breaking capacity is confirmed at particular levels.
OEM & B2B supply support
Subian Electric is an established supplier for power equipment manufacturers and factories. Our experience and expertise makes us a partner of choice among utilities providers, switchgear manufacturers, and industrial customers in VCB supply and technical support.
Please contact us to inquire about our specific continuous or breaking current ratings and quantities.
- Sample versions can be received.
- Flexible volume for projects and B2B purchasing is available.
- OEM service is provided.
- Custom packaging and labelling can be arranged.
- Technical documents and certification can be provided.
Frequently Asked Questions
What is the ZN85-40.5 used for?
It is used for safeguarding 40.5 kV indoor distribution and industrial circuits against short-circuit and overload, with a maximum rating of 2000A and 31.5 kA.
Why vacuum arc extinction?
The vacuum circuit breaker is preferred because of its ability to quench the arc effectively and with less maintenance.
What are the available ratings?
ZN86-200 can offer the current ratings of 1250A, 1600A, and 2000A with a breaking capacity of 20kA, 25kA or 31.5kA.
Can it be used in switchgear panels?
Yes, it has an integrated compact design, making it suitable for switchgear panels.
