Product Description

The ZW7-40.5 outdoor vacuum circuit breaker is widely used in conventional power plants, industrial facilities, photovoltaic and wind farms, mining power supply systems, and overhead transmission lines. It is specifically designed for 40.5 kV, 50/60 Hz three-phase AC power distribution systems.

The ZW7-40.5 Outdoor Vacuum Circuit Breaker features a compact structural design with standard mounting dimensions, facilitating easy on-site installation. Its enclosure is made of durable stainless steel - offering waterproof, dustproof, and anti-condensation capabilities - while all metal components undergo hot-dip galvanizing for superior corrosion resistance, further extending the product's service life.

Functioning as a core control switch in medium- and high-voltage power transmission and distribution projects, the unit handles current making and breaking operations, thereby protecting lines and equipment from short-circuit and overload damage.

Designed with environmental sustainability in mind, the product utilizes vacuum arc-extinguishing technology and is free from SF6 gas. It offers rapid arc extinction, low overvoltage levels, and stable, reliable operation. Equipped with high-strength composite insulators featuring ample creepage distance, it demonstrates excellent resistance to pollution flashover and aging, making it suitable for harsh outdoor environments characterized by coastal salt spray, industrial dust, and wind-blown sand.

The ZW7-40.5 employs a spring operating mechanism, ensuring superior operational performance and low vibration. It supports remote opening/closing and manual emergency operation, and integrates intelligent systems for remote signal feedback and status monitoring, enabling unmanned operation and reducing labor costs.

Each The ZW7-40.5 Outdoor Vacuum Circuit Breaker undergoes rigorous factory testing to ensure precise performance parameters and excellent compatibility, fully complying with industry and international standards. Backed by comprehensive technical support for projects and tenders, it is the ideal choice for your outdoor power distribution needs.

Product Specifications

Operating Environment Conditions

Ambient temperature: -40℃ ～ +50℃
Altitude: ≤3000 m
Maximum wind speed: ≤35 m/s
Seismic intensity: ≤ Grade 8
Pollution degree: Class III. Higher creepage insulators can be supplied upon request.
No explosive gas, corrosive media or heavy conductive dust in the atmosphere.
Relative humidity: daily average ≤95%, monthly average ≤90%.

Our Product Advantage

1. Vacuum-sealed, eco-friendly, and low-maintenance

Features an optimized vacuum interrupter (VI) design. The equipment eliminates the use of SF6 gas, achieving faster arc extinction, higher dielectric strength, and lower switching overvoltage, while reducing contact wear and minimizing routine maintenance requirements.

2. ISO-compliant hot-dip galvanizing process

Steel components undergo an ISO-compliant hot-dip galvanizing process, offering excellent resistance to salt spray, dust, extreme temperature fluctuations, and high humidity. Suitable for areas with Pollution Level III and high-altitude locations.

3. Reliable spring operating mechanism and remote control capabilities

Equipped with a proven, high-performance spring operating mechanism that supports electric remote control and emergency manual operation. Features interfaces for SCADA system integration, making it ideal for unmanned substation applications. The enclosure is constructed from high-quality stainless steel, providing water, dust, and moisture resistance.

4. Standardized design for rapid installation

Compact overall design and standardized mounting base dimensions allow for installation without complex technical procedures. Streamlined lifting, wiring, and installation processes help shorten project timelines.

5. Rigorous factory testing and comprehensive technical documentation

The equipment undergoes a series of Factory Acceptance Tests (FAT) to ensure operational reliability. Products strictly adhere to IEC standards and come with necessary documentation - including test reports, certificates of conformity, and manufacturer certifications - to meet the requirements of international EPC tenders and project acceptance.

Shipment

FAQ

Q: Which standards does the product meet?

A: It complies with the international standard IEC 62271-100 and the acceptance requirements for overseas projects.

Q: What are the applicable operating conditions?

A: Ambient temperature: -40°C to +50°C; altitude: ≤3000 m; maximum wind speed: 35 m/s; seismic rating: Intensity 8 (MSK-64 scale); pollution level: Class III. Suitable for coastal, windy/sandy, and high-humidity regions; creepage distance specifications can be customized.

Q: What type of operating mechanism is used?

A: Spring operating mechanism; supports remote electric opening/closing and manual emergency operation; control system power supply: AC/DC 220 V.

Q: What anti-corrosion measures are applied to the enclosure?

A: The enclosure is made of stainless steel; exposed steel components undergo hot-dip galvanizing in accordance with ISO 1461 standards, ensuring excellent salt-spray and rust resistance.

Q: What factory tests are performed? Is relevant documentation provided for tenders?

A: Each unit undergoes a full suite of Factory Acceptance Tests (FAT), including power-frequency withstand voltage, lightning impulse withstand voltage, circuit resistance, and mechanical characteristic tests. For international tenders, test reports, certificates of conformity, and Letters of Authorization (LOA) from the manufacturer can be provided.

Q: Is installation complex? Are installation drawings provided?

A: Standardized installation dimensions simplify foundation construction; outline dimension drawings and embedded part installation drawings are available.

Q: Regarding export packaging: is neutral packaging or custom branding supported?

A: Export-grade fumigated wooden crates are used; neutral packaging is supported; customer logos can be printed on nameplates and outer cartons upon request.

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