The Go-To Breaker for 10kV Distribution
For 10kV distribution lines — the backbone of medium-voltage power delivery in most countries — the ZW32-12 outdoor pole-mounted vacuum circuit breaker is the industry-standard recommendation. With a rated voltage of 12kV and designed for three-phase AC 50Hz outdoor service, the ZW32-12 provides reliable protection and control for substations, industrial facilities, and urban/rural distribution networks.
What the ZW32-12 Can Do
The ZW32-12 is designed to interrupt, close, and carry load current, overload current, and short-circuit current in power distribution systems. It serves as both a protection device (tripping automatically on faults) and a control device (allowing manual or remote switching of feeders).
The breaker is particularly well-suited for substations, industrial power distribution, urban and rural grid construction/renovation projects, and locations requiring frequent switching operations — such as tie switches in ring network configurations or sectionalizing points on long feeders.
Three Operating Modes
The ZW32-12 uses a spring-stored-energy operating mechanism that supports three modes of operation:
Manual operation: The operator charges the closing spring by hand and triggers close/open commands with a local lever. Suitable for remote locations without power supply.
Electric motor operation: A motor charges the closing spring, and close/open commands are issued via local pushbuttons or switches. Suitable for attended substations and industrial applications.
Remote operation: Close and open commands are sent from a SCADA system, distribution automation controller, or remote terminal unit (RTU). This mode enables fully automated feeder management, fault isolation, and service restoration.
Integrated Isolation Switch Option
An optional isolation (disconnector) switch can be added to the side of the ZW32-12, creating a combined breaker-disconnector unit. This is a significant advantage for pole-mounted installations where space is limited and installing a separate disconnector would require an additional pole or cross-arm. The integrated design reduces material costs, installation labor, and visual impact.
NAIJI Electric ZW32-12
NAIJI Electric manufactures the ZW32-12 with over 25 years of medium-voltage switchgear experience. Every unit is fully tested per IEC 62271-100 and GB 1984 standards. Our ZW32-12 is available in standard and enhanced configurations, including models with built-in current transformers (CTs) for metering and protection, and models pre-wired for FTU (feeder terminal unit) integration in distribution automation systems.