ZW-40.5 Vacuum Circuit Breaker | 40.5kV Compact Outdoor Breaker

The ZW-40.5 outdoor vacuum circuit breaker is a fully sealed, compact design tailored for 33kV–40.5kV medium-voltage outdoor distribution networks. Using vacuum arc extinguishing technology and SF6/N2 hybrid insulation, this breaker ensures maintenance-free operation in harsh environments.

Ideal for pole-mounted or platform-mounted installation, it supports remote control and fault detection for modern smart grid systems.

⚙️ Key Features

Rated Voltage: 40.5kV (for 33kV systems)
Rated Current: 1250A / 1600A
Arc Extinguishing: Vacuum Interruption
Insulation Type: Solid-sealed + SF6/N2 sealed chamber
Structure: Compact three-phase enclosure
Control Options: Manual / Motorized / Remote via FTU
Installation: Pole-mounted or box-type platform-mounted

📐 Technical Specifications

Item	Value
Rated Voltage	40.5kV
Rated Current	1250A / 1600A
Short-Circuit Breaking	25kA / 31.5kA (1s)
Peak Withstand Current	63kA / 80kA
Mechanical Life	≥ 10,000 operations
Electrical Life	≥ 30 operations @ full fault
Closing Time	≤ 60ms
Power Frequency Withstand	95kV / 185kV BIL
Control Voltage	DC 110V / 220V (optional)
Standards	GB1984, IEC 62271-100

✅ Standards & Certifications

GB1984 – AC high-voltage circuit breakers
IEC 62271-100 – HV switchgear & breakers
ISO 9001 / ISO 14001 / ISO 45001
CE certified with complete type test reports

🌍 Application Scenarios

Rural 33kV/35kV outdoor distribution networks
Pole-mounted fault breaking and isolating
Remote sectionalizing in smart grids
Outdoor substations and renewable energy outputs
High-humidity / dusty/coastal installation zones

📊 Case Study: Algeria Rural Distribution Project (2023)

In 2023, Algeria's SONELGAZ utility deployed over 120 ZW-40.5 compact vacuum breakers to upgrade rural feeders. These units replaced aging air circuit breakers, significantly reducing failure rates.

✅ Key Outcomes:
Remote operation enabled through FTU/GPRS
Reduced outage response time by 42%
Maintained SF6 integrity for 18+ months

❓ Frequently Asked Questions

1. What’s the difference between ZW-40.5 and ZW32 series?
ZW-40.5 offers a higher voltage rating (up to 40.5kV) and sealed insulation, while ZW32 is typically 12kV–24kV rated with open-type support insulators.

2. Can it be used in coastal or dusty zones?
Yes. The sealed compact structure offers excellent protection in polluted environments.

3. Is the remote control supported?
Yes. Equipped with FTU/CT/PT interface for SCADA and smart grid integration.

4. What's the maintenance cycle?
ZW-40.5 is maintenance-free for over 10 years under standard operation.

5. What’s the typical delivery time?
10–20 working days, depending on order volume and accessories.