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Modern electrical distribution networks demand resilient switching equipment that can handle transient faults without unnecessary outages. The 33KV Outdoor Recloser Circuit Breaker stands at the core of this requirement, combining vacuum interruption with automatic reclosing functionality in a weatherproof package. Its interrupter module leverages the same proven technology found in our 33KV Vacuum Circuit Breaker, delivering reliable arc quenching without oil or SF6 gas. As an Automatic Reclosing Circuit Breaker, it executes pre-programmed reclosing sequences, restoring power after momentary faults while locking out for permanent ones. This outdoor solution fills a critical role in the 33KV Automatic Reclosing Circuit Breaker product family, offering a lightweight pole-mounted or substation-deployable form factor ideally suited for rural, industrial, and utility feeder applications.
The Outdoor Recloser Circuit Breaker is engineered to simplify field installation and long-term operation. Its integrated voltage and current sensors eliminate the need for external instrument transformers, while a durable cycloaliphatic epoxy insulation system resists UV, pollution, and tracking. Inside the sealed stainless-steel enclosure, a magnetic actuator drives fast opening and closing operations, supported by a maintenance-free capacitor bank for trip-and-close energy. Electronic control units provide programmable protection curves, event logging, and seamless integration with SCADA and distribution management systems.
| Parameter | Specification |
|---|---|
| Rated voltage | 33 kV (also available in 15 kV, 27 kV variants) |
| Rated continuous current | 630 A (800 A optional) |
| Rated short-time withstand current | 20 kA for 3 seconds |
| Rated peak withstand current | 50 kA |
| Rated short-circuit breaking capacity | 20 kA |
| Rated cable charging breaking current | 25 A |
| Reclosing sequences | Standard 4 attempts; configurable dead times 0.3–60 s |
| Control supply voltage | 24–220 V DC / 110–240 V AC (wide-range supply) |
| Mechanical endurance | 10,000 CO cycles (maintenance-free) |
| Protection degree | IP67 for interrupter enclosure, IP55 for control cubicle |
| Bushings and creepage distance | ≥ 900 mm creepage, suitable for heavy pollution level (IV) |
| Mounting | Direct pole/steel structure mounting with standard bracket |
Field-proven actuator technology ensures opening times under 40 ms and closing times below 60 ms, enabling fast arc clearance and improved power quality. The electronic recloser control stores up to 500 event records and 10,000 load profile entries, supporting predictive maintenance decisions. Current versions support IEC 61850 communication in addition to DNP3 and Modbus protocols, making the recloser ready for digital substation architectures. Every unit undergoes a full type-test program including dielectric, temperature rise, short-circuit, and mechanical endurance tests, with a certified 30-year service life under normal operating conditions.
