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For modern medium-voltage distribution networks, the ZW32-40.5 Outdoor Recloser Circuit Breaker stands as a robust solution designed to enhance grid reliability and reduce outage durations. This pole-mounted vacuum recloser integrates a high-performance vacuum interrupter with an intelligent control system, allowing for automatic fault detection, interruption, and multiple reclosing attempts. Its seamless compatibility with related products such as the 33KV Vacuum Circuit Breaker and the broader family of Outdoor Recloser Circuit Breaker units makes it a versatile choice for utilities upgrading their infrastructure. Engineers will appreciate how this model extends the functionality found in an Automatic Reclosing Circuit Breaker while delivering the specific voltage-level performance expected from a 33KV Outdoor Recloser Circuit Breaker. Solid dielectric insulation and an IP-rated enclosure ensure years of maintenance-free service even under harsh weather, coastal humidity, or heavy pollution.
The ZW32-40.5 Outdoor Recloser Circuit Breaker is engineered to meet the rigorous demands of 40.5kV networks with a symmetrical interrupting capacity of 25kA and a mechanical endurance exceeding 10,000 operations. Its operating mechanism utilizes a permanent magnetic actuator, eliminating traditional spring-charging motors and significantly reducing the number of moving parts. Detailed product parameters are outlined below to provide a clear technical overview.
| Parameter | Value |
|---|---|
| Rated Voltage | 40.5 kV |
| Rated Continuous Current | 630 A / 1250 A |
| Rated Short-Circuit Breaking Current | 25 kA (rms) |
| Rated Short-Circuit Making Current | 63 kA (peak) |
| Rated Insulation Level (1 min Power Frequency) | 95 kV (dry) / 80 kV (wet) |
| Rated Lightning Impulse Withstand Voltage | 185 kV |
| Mechanical Endurance | 10,000 operations |
| Interrupting Medium | Vacuum |
| Reclosing Sequence | Up to 4 shots programmable |
| Control Power Supply | 220V DC / 110V DC or AC self-powered via CT |
| Operating Temperature Range | -40 °C to +55 °C |
| Enclosure Protection Class | IP65 |
| Weight (excluding controller) | Approx. 155 kg |
Standard features include phase-to-phase and phase-to-ground overcurrent protection, sensitive earth fault detection, and cold load pickup logic. The integrated programmable logic controller supports IEC 61850 communication protocols, enabling seamless SCADA integration via fiber optic or cellular modem. All current and voltage transformers are epoxy-cast and housed inside the weatherproof enclosure, ensuring high measurement accuracy without external wiring interfaces. The permanent magnetic actuator operates with a bi-stable latch, meaning the breaker consumes energy only during the switching transition—ideal for remote locations where auxiliary power availability is limited. The ZW32-40.5 Outdoor Recloser Circuit Breaker is factory tested per IEC 62271-100 and IEC 62271-111, and an optional automatic voltage regulator can be included for networks experiencing excessive voltage fluctuations. Routine maintenance consists primarily of visual inspections and occasional contact resistance checks, making the total cost of ownership exceptionally low over its 25-year service life.
