ZW-40.5M Outdoor Sealed Permanent Magnet Circuit Breaker

The ZW-40.5M is a permanently sealed 40.5kV vacuum circuit breaker featuring a permanent magnet operating mechanism, designed for reliable outdoor switching in harsh grid environments. Unlike spring or hydraulic-operated VCBs, its magnetic actuator offers maintenance-free operation, long life cycles, and high-speed switching for overhead lines and substations.

Key Technical Specifications

Parameter	Value
Rated Voltage	40.5 kV
Rated Current	1250 A / 1600 A (optional)
Short-Circuit Breaking	25 kA / 31.5 kA
Operating Mechanism	Permanent Magnet Mechanism
Insulation Medium	Vacuum
Degree of Protection	IP65 (fully sealed design)
Mechanical Life	≥ 30,000 operations
Standards	IEC 62271-100, GB 1984

Unique Features

Permanent Magnet Mechanism
Unlike traditional spring mechanisms, this model uses a permanent magnet actuator that ensures zero maintenance and consistent switching accuracy even after tens of thousands of operations.
Fully Sealed IP65 Housing
No risk of moisture or dust intrusion. Ideal for outdoor conditions like coastal, plateau, and desert regions.
SF6-Free & Eco-Friendly
100% vacuum insulation—conforms to global sustainability trends by avoiding SF6 emissions.
Ultra-Fast Operation Time
<30ms breaking time makes it suitable for automatic reclosers or fast protection schemes in renewable or industrial grids.

Application Scenarios

The ZW-40.5M is ideal for:

35kV Renewable Energy Collection Stations (wind or solar farms)
Substation feeders in mountainous or cold zones
Distribution automation systems require remote control and high reliability
Industrial zone protection where breaker cycles are frequent

Real-World Case Study

In 2023, the Icelandic Transmission Authority installed ZW-40.5M breakers at three remote wind power collection points. Due to its sealed body and magnetic mechanism, the breakers functioned flawlessly at -20°C with no mechanical intervention after one year.

Source: Iceland Grid Energy Report, Q4 2023

Verified Customer Reviews

★★★★★
“Best choice for harsh climates. After operating in the Finnish Arctic Circle, we saw no mechanical wear or heating.”
— Anders L., Senior Engineer, Nordic Energy Group (via Capterra)

★★★★☆
“No maintenance needed in over 18 months of operation. Magnet drive is a game-changer.”
— Mia T., Distribution Engineer, GridSmart Germany

★★★★★
“We used ZW-40.5M in a solar substation in Nevada. No SF6, no maintenance, excellent contact wear rate.”
— John B., Field Ops Manager, SolarWest USA (via GlobalSpec)

★★★★☆
“We chose this model to replace SF6-based breakers. Environmentally safe and responsive operation.”
— David R., Project Lead, GreenSwitch UK

★★★★★
“Solid design. IP65 protection held up through two storm seasons without any failure.”
— Emma S., Substation Team Lead, Hydro Québec

Installation Guidelines

1. Mount on a concrete or steel structure pole using standardized brackets.

2. Connect incoming/outgoing cables via bushing terminals (M16).

3 . Integrate the remote control module via a 4-pin auxiliary signal interface.

4 . Verify insulation resistance > 2000MΩ.

5. Activate the magnet mechanism via SCADA or a local manual trigger.

Certifications & Compliance

IEC 62271-100 (High-voltage switchgear and controlgear – VCBs)
GB 1984 Chinese National Standard
CE and RoHS Conformity

About Wei Shoe Electric

This product is developed by Wei Shoe Electric, a specialized manufacturer of high-voltage outdoor equipment since 2014. I’m Thor, your engineering contact and specialist in smart switching solutions. We provide rugged, efficient products trusted by utilities across Europe, Asia, and North America.

📞 Tel: 86-0577-62788197
💬 WhatsApp: +86 159 5777 0984
📧 Email: thor@weishoelec.com