Product Overview

ZW32-40.5 Single Pole Outdoor Vacuum Circuit Breaker is a 40.5kV pole-mounted vacuum switching device designed for medium-voltage overhead distribution systems. Featuring a modular single-pole construction and permanent magnetic operating mechanism, it delivers reliable load switching, overload protection, short-circuit interruption, and automatic reclosing for modern distribution networks.

Three independent poles can be assembled into a complete three-phase automatic recloser system, making the breaker suitable for utility substations, rural electrification, renewable energy projects, industrial distribution networks, and smart grid applications.

The breaker incorporates a sealed vacuum interrupter, integral silicone rubber insulation, stainless steel enclosure, and copper main contacts to ensure maintenance-free operation, excellent weather resistance, and long service life under harsh outdoor environments.

Key Features

Permanent Magnetic Operating Mechanism

• Maintenance-free design

• Stable opening and closing performance

• Mechanical life up to 20,000 operations

• Low operating energy consumption

• Three-phase synchronization ≤3 ms

One-Piece Silicone Rubber Insulation

• Integral molded construction

• Superior moisture resistance

• UV resistant

• Salt fog resistant

• Pollution Class IV

• Operating temperature:

• -30°C to +60°C

• Storage: -40°C to +85°C

Vacuum Interruption Technology

• Excellent arc extinguishing capability

• No SF₆ gas

• Environmentally friendly

• High dielectric recovery strength

• Long electrical endurance

Stainless Steel Sealed Tank

• Corrosion-resistant stainless steel enclosure

• Fully sealed against rain, dust, snow and humidity

• Suitable for coastal, mining and desert environments

• Lightweight construction for pole mounting

High Conductivity Copper Contacts

• Forged high-purity copper contacts

• Contact resistance below 120 μΩ

• Low temperature rise

• Excellent conductivity

• Long electrical life

Available Configurations

Technical Specifications

Operating Conditions

Intelligent Protection Functions

When equipped with an intelligent controller, the breaker supports:

• Overcurrent Protection

• Earth Fault Protection

• Three-stage Protection

• Automatic Reclosing (0–3 shots)

• Voltage Monitoring

• Current Monitoring

• Remote Opening/Closing

• Fault Recording

• SCADA Communication

• Distribution Automation Integration

Applications

The ZW32-40.5 is widely used in:

• Utility distribution networks

• Rural electrification

• Pole-mounted substations

• Renewable energy plants

• Solar power stations

• Wind farms

• Hydropower stations

• Mining power distribution

• Industrial facilities

• Smart Grid projects

Three single poles can also be configured into a complete 27kV or 35kV automatic recloser system for overseas utility projects.

Standard Configuration

• Vacuum Interrupter

• Silicone Rubber Insulators

• Stainless Steel Tank

• Copper Main Contacts

• Permanent Magnetic Operating Mechanism

Optional Accessories

• Automatic Reclosing Controller

• 20Ah Backup Battery

• Voltage Transformer (PT)

• Current Transformer (CT)

• 32-pin Communication Connector

• Anti-corrosion Coating

• Three-phase Mounting Frame

• SCADA Communication Module

• Wireless Remote Monitoring

Compliance Standards

The breaker can be manufactured to comply with:

• IEC 62271-100

• IEC 62271-1

• IEC 60044 (CT/PT Option)

• IEC 60529 (IP Protection)

• IEEE / ANSI Standards (Optional)

• 50Hz or 60Hz Systems

Why Choose Weisho Electric?

• Professional Medium Voltage Equipment Manufacturer

• 12+ Years Export Experience

• ISO9001 Certified Factory

• OEM & ODM Service

• Fast Technical Support

• Flexible Customization

• Competitive Factory Price

• Global Project Experience

• Complete Type Testing

• Reliable After-sales Service