ZW7-40.5/1250A Outdoor Pole-Mounted Switch 35KV Smart HV Vacuum Breaker

Overview

Operating Conditions

1. Ambient Temperature: -40 ~ +40°C;

2. Altitude: ≤2000m;

3. Wind Speed: ≤34m/s

4. Pollution Level: Class III / IV;

5. Earthquake Intensity: ≤8 Degree;

6. Ice Thickness: ≤10mm (Select models).

Features

The ZW7-40.5/1250A is specially developed for wind power applications, combining intelligent control, reliable protection, and strong environmental adaptability. Its optimized design addresses the requirements of remote wind farms, renewable energy grid connections, and outdoor medium-voltage power distribution systems.

Intelligent Control and Communication Capability

Equipped with an advanced microprocessor-based control system and communication module, the ZW7-40.5/1250A supports intelligent monitoring, remote operation, parameter configuration, and fault analysis. It can be integrated with wind farm SCADA systems and dispatch platforms, enabling operators to manage equipment status and perform control operations remotely.

Key functions include:

• Remote monitoring and control
• Parameter setting and adjustment
• Fault detection and diagnosis
• SCADA system integration
• Communication with smart grid platforms

This intelligent design reduces manual inspection requirements and improves the operational efficiency of wind power facilities.

Fast Automatic Reclosing for Wind Power Applications

Wind power distribution lines are often exposed to temporary disturbances such as lightning strikes and environmental interference. The ZW7-40.5/1250A features a fast automatic reclosing function that can quickly restore power after transient faults, reducing unnecessary downtime and improving wind farm energy output reliability.

Outdoor Pole-Mounted Design with Flexible Installation

The pole-mounted structure eliminates the need for complex installation facilities and simplifies deployment in remote wind power locations. Its compact design reduces construction requirements while providing convenient transportation and installation.

Main advantages include:

• Space-saving outdoor installation
• Reduced infrastructure investment
• Faster project deployment
• Suitable for remote wind farm environments

Vacuum Interruption Technology and Long Service Life

The ZW7-40.5/1250A adopts reliable vacuum arc extinguishing technology to achieve safe and efficient interruption of fault currents. The vacuum interrupter minimizes contact wear and improves electrical endurance, making it suitable for frequent switching and automatic reclosing applications.

• Fast and reliable fault current interruption
• Low contact wear
• Mechanical life up to 10,000 operations
• Reduced maintenance requirements

Excellent Environmental Resistance

Designed for harsh outdoor conditions, the ZW7-40.5/1250A provides reliable operation in demanding wind farm environments. The breaker is engineered to withstand temperature variations, strong winds, dust, moisture, and heavy pollution conditions.

Environmental protection features include:

• Operating temperature: -40°C to +40°C
• Pollution Class IV resistance
• Anti-condensation design
• Moisture-proof structure
• Corrosion-resistant protection

These features ensure stable performance in coastal, high-altitude, and remote wind power installations.

Integrated Current Transformer and Protection Functions

Selected configurations can be equipped with high-precision built-in current transformers for accurate line current measurement and protection coordination. Combined with overload and short-circuit protection functions, the ZW7-40.5/1250A provides comprehensive protection for wind turbines and power transmission lines.

• High-accuracy current measurement
• Overload protection
• Short-circuit protection
• Enhanced grid safety and reliability

Technical Data

Overall and mounting dimensions(mm)

Typical Application Scenarios

The ZW7-40.5/1250A Outdoor Pole-Mounted Smart Vacuum Circuit Breaker is designed for wind power grid connection and outdoor medium-voltage distribution applications. With intelligent protection, remote communication, and strong environmental adaptability, it provides reliable switching and fault management solutions for wind farms in different regions and climates.

Onshore Wind Farms in Remote Areas

Wind farms located in remote areas such as deserts, plateaus, and mountainous regions often face challenges including extreme weather, difficult maintenance access, and unstable grid conditions.

The ZW7-40.5/1250A provides reliable operation in these environments through its outdoor pole-mounted structure, fast reclosing capability, and remote monitoring functions. Integration with SCADA systems allows operators to monitor equipment status and manage faults without frequent on-site inspections.

Main benefits include:

• Reliable operation under harsh outdoor conditions
• Remote monitoring and control capability
• Fast recovery from transient faults
• Reduced maintenance workload

Distributed Wind Power Projects in Humid and High-Pollution Areas

For wind power installations in coastal areas, tropical regions, and environments with high humidity or salt exposure, outdoor electrical equipment requires strong sealing and corrosion resistance.

The ZW7-40.5/1250A features a robust enclosure design and high environmental adaptability, helping maintain stable insulation performance and reliable switching operation in challenging climates.

Suitable environments include:

• Coastal wind farms
• High-humidity regions
• Areas with heavy pollution levels
• Storm-prone renewable energy sites

Wind Power Grid Connection and Transmission Applications

Wind power interconnection points require reliable protection and switching equipment to ensure stable energy transmission. The ZW7-40.5/1250A combines high breaking capability, intelligent control, and flexible installation to support reliable operation at wind farm feeder points and grid connection systems.

Its advantages include:

• High reliability for grid connection applications
• Intelligent protection and fault isolation
• Long mechanical service life
• Flexible outdoor installation

Installation, Maintenance, and Safety Advantages

Fast Installation for Remote Wind Power Projects

The ZW7-40.5/1250A adopts a compact pole-mounted structure that simplifies transportation and installation. Compared with conventional substation-based equipment, it reduces construction requirements and allows faster deployment in remote wind farm locations.

Key advantages include:

• Integrated outdoor pole-mounted design
• Reduced installation complexity
• Lower construction requirements
• Suitable for remote project deployment

Intelligent Operation and Maintenance

With built-in intelligent control and communication capabilities, the breaker supports remote status monitoring, fault alarms, and operational data collection. Through integration with wind farm SCADA systems, maintenance teams can analyze equipment conditions and perform initial fault diagnosis remotely.

This helps:

• Reduce unnecessary site visits
• Improve maintenance efficiency
• Lower operational risks in remote areas
• Increase wind farm availability

Reliable Protection for Wind Turbines and Power Networks

The ZW7-40.5/1250A integrates multiple protection functions to quickly respond to abnormal operating conditions. Its vacuum interruption technology and intelligent controller work together to achieve fast fault interruption, isolation, and power restoration.

Protection functions include:

• Overload protection
• Short-circuit protection
• Fast fault isolation
• Automatic reclosing support

These capabilities help protect wind turbine equipment, improve grid stability, and ensure continuous renewable energy transmission.