ZW32 Outdoor Vacuum Circuit Breaker | 12kV Pole-Mounted

Overview

The ZW32 series outdoor pole-mounted vacuum circuit breaker is a three-phase AC outdoor primary switching device rated for 12kV (available in 24kV and 40.5kV variants upon request), for 50Hz/60Hz power systems. Designed with advanced vacuum arc interruption and solid insulation technology, it is engineered to safely break and close load currents, overload currents and short-circuit currents in power distribution networks.

With a compact three-phase pillar structure, the ZW32 offers reliable performance in harsh outdoor environments, making it suitable for substations, industrial and mining distribution systems, rural electrification projects, and frequent-operation scenarios.

Key Features

• Vacuum arc interruption technology — safe, reliable operation with no fire or explosion risk.
• Maintenance-free design — reduced operational costs over the lifetime of the equipment.
• Compact and lightweight — easy pole-mounting with a minimal footprint.
• All-weather durability — operates reliably in wet, cold, heat, and high-pollution environments.
• Smart controller compatible — enables distribution automation and remote monitoring.
• Flexible mechanism options — spring or permanent magnet mechanisms to suit different operational needs.
• Optional isolation switch — provides a visible break point for enhanced safety.
• Solid insulation — silicone rubber or epoxy resin insulation materials are used.
• Distribution automation ready — when paired with an intelligent controller (FTU), the ZW32 supports distribution automation as an automated recloser for fault detection, isolation and service restoration.

Technical Specifications

Applications

• 10–12kV overhead distribution networks.
• Substations — protection and control of feeder lines.
• Industrial facilities — power distribution and equipment protection.
• Mining operations — reliable switching in demanding environments.
• Rural electrification — frequent operation scenarios and remote locations.
• Urban power grids — as line sectionalizers and boundary switches.
• Distribution automation — as an automated recloser when configured with an intelligent controller for fault detection, isolation and service restoration.

Installation Conditions

• The breaker is a pole-mounted outdoor unit — confirm the pole mounting arrangements and accessories before installation.
• Confirm the control voltage available at the site: DC24V, DC110V, DC220V or AC220V.
• The opening operating voltage range is 65%–120% and the closing operating voltage range is 85%–110% of rated control voltage — verify the auxiliary supply meets these limits.
• If distribution automation is required, allow for the intelligent FTU controller and its communication arrangements.
• Where a visible break point is required for safety, specify the optional isolation switch.

How to Select

• The model required — ZW32-12, ZW32-24 or ZW32-40.5.
• The rated current required — 630A or 1250A.
• The breaking capacity required — 20kA or 25kA.
• The operating mechanism type — spring type or permanent magnet type.
• The control voltage available — DC24V, DC110V, DC220V or AC220V.
• Whether an isolation switch is required for a visible break point.
• Whether a standard controller or an intelligent FTU is needed.
• The mounting accessories required for the project.

FAQ

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