Product Description

This outdoor manual vacuum circuit breaker is specifically designed for pole-mounted installation on overhead distribution networks.

The outdoor manual vacuum circuit breaker utilizes a high-performance vacuum interrupter sealed within a protective housing; the arc-extinguishing process occurs entirely within the vacuum chamber, eliminating the risk of external arcing and ensuring maintenance-free operation and long-term stability across various environmental conditions. The unit is equipped with a manual spring-energy storage operating mechanism.

Manual operations - such as energy storage, opening, and closing - can be performed without an external control power supply. This ensures full functionality during grid outages, facilitating line maintenance, isolation, and troubleshooting.

In the event of a short circuit or overcurrent, the device instantly interrupts the faulty circuit to protect grounding transformers, cables, and associated equipment, while preventing the fault from spreading. It effectively handles the making, breaking, and carrying of load currents, overload currents, and short-circuit currents within the distribution system.

The housing offers excellent resistance to aging, rain, dust, and corrosion, making it highly suitable for harsh outdoor environments and pole-mounted applications. Its insulation materials perform reliably under demanding conditions - such as high temperatures, polluted environments, or extreme diurnal temperature fluctuations - making it an ideal choice for projects in regions like the Middle East and Africa.

The outdoor manual vacuum circuit breaker boasts a mechanical lifespan of up to 10,000 operating cycles and supports 30 operations at the rated short-circuit breaking current. The contact design incorporates a generous safety margin, and the clear insulation distance exceeds 200 mm, ensuring operator safety during maintenance.

Product Specification

Parameter	Technical data
Rated Voltage	24KV
Rated Current	630A
Frequency	50HZ
Short circuit break current	20KA
Short-time Withstand Current	20KA
Peak Withstand Current	50KA
Mechanical Life	10000 Times
Power Frequency Withstand Voltage	65KV
lightning impulse withstand voltage	145KV

Our Product Advantage

01/

Utilizes a high-vacuum system that is SF6-free, meeting environmental protection standards. It offers excellent arc-extinguishing performance, characterized by rapid arc quenching, low switching overvoltage, minimal contact wear, and low maintenance requirements during long-term operation.

02/

Features silicone rubber insulators with superior aging and corrosion resistance. The corrosion-resistant metal enclosure is rainproof, dustproof, and waterproof, making it suitable for various harsh environments.

03/

Employs a spring-operated mechanism for opening and closing operations; manual operation is standard, with an optional electric operating unit available for remote control.

04/

Designed for pole-mounted installation, facilitating quick setup and commissioning. An optional external disconnect switch can be added to provide a visible break during maintenance, ensuring operational safety.

05/

Equipped with secondary signal interfaces, allowing integration with an FTU (Feeder Terminal Unit) and connection to a SCADA system. This enables remote measurement, remote signaling, and remote control functions, meeting the requirements of distribution network automation.

Operating Environment Conditions

Ambient temperature: -40℃ ~ +40℃
Altitude: ≤2000 m above sea level
Maximum wind speed: ≤35 m/s
Seismic intensity: ≤ Grade 8
Pollution degree: Class III. Longer creepage insulators available upon request for heavy pollution area.
No explosive gas, corrosive media or heavy conductive dust in the surrounding atmosphere.
Relative humidity: daily average ≤95%, monthly average ≤90%.

FAQ

1. Q: What is the difference between 24kV and 12kV poles (or circuit breaker poles)?

A: This product is designed for 24kV distribution systems; it withstands high voltages and is compatible with 24kV overhead lines. Its vacuum insulation system is engineered for the 24kV class, ensuring reliable insulation performance even at high voltages.

2. Q: Is this product suitable for frequent operation?

A: Yes. It has a service life of approximately 10,000 operations. The mechanical spring mechanism is carefully designed and installed to meet the demands of long-term use.

3. Q: What protection functions does the system provide?

A: It provides lightning protection. When used with an FTU (Feeder Terminal Unit) controller, it enables fault diagnosis, fault isolation, and power restoration, functioning as part of a distributed distribution network.

4. Q: What materials is the equipment made of, and how weather-resistant is it?

A: The top section is made of stainless steel with a thick coating, providing effective rain and water resistance. Metal components undergo anti-corrosion treatment to ensure durability.

5. Q: Can this product be installed directly onto existing flooring?

A: Yes. The design is well-suited for installation on hardwood flooring, and the necessary adhesive is included. Installation drawings can be provided in advance to facilitate site preparation.

6. Q: What factory tests are performed?

A: Factory Acceptance Tests (FAT) include withstand voltage tests, temperature rise tests, circuit board tests, and mechanical performance tests; a complete test report is supplied with the product.

7. Q: Does the product require regular maintenance?

A: Generally, the vacuum interrupter requires no maintenance. Routine maintenance involves only periodic checks of connections and cables, thereby reducing the operational and maintenance workload.

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