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As power grids evolve toward automation and self-healing operation, utilities require switching equipment that can do far more than interrupt fault currents. The 33KV Automatic Reclosing Circuit Breaker is designed as an intelligent field device capable of detecting temporary faults, isolating permanent failures, and automatically restoring healthy sections of the network without operator intervention. By minimizing outage duration and reducing unnecessary dispatches, it helps utilities improve SAIDI, SAIFI, and overall grid reliability.
Built around advanced vacuum interruption technology and an intelligent electronic controller, this breaker integrates protection, monitoring, metering, communication, and automatic reclosing into a single outdoor solution. Unlike conventional circuit breakers that simply trip during a fault, the 33KV Automatic Reclosing Circuit Breaker analyzes fault characteristics, executes programmable multi-shot reclosing sequences, and communicates operating status directly to SCADA and Distribution Management Systems (DMS), making it an essential component for modern smart grids.
The equipment is widely deployed on overhead distribution feeders, rural electrification projects, renewable energy collection systems, industrial distribution networks, utility substations, and railway power systems where uninterrupted power supply is critical. Its sealed vacuum interrupters, corrosion-resistant construction, and maintenance-friendly design ensure dependable performance even under severe weather, high humidity, coastal pollution, and desert environments.
| Parameter | Specification |
|---|---|
| Rated Voltage | 33kV |
| Maximum System Voltage | 36kV |
| Rated Frequency | 50Hz / 60Hz |
| Rated Continuous Current | 630A / 1250A |
| Rated Short Circuit Breaking Current | 20kA / 25kA / 31.5kA |
| Rated Making Current | 50kA / 63kA / 80kA Peak |
| Rated Short-Time Withstand Current | 25kA / 31.5kA (3 Seconds) |
| Lightning Impulse Withstand Voltage (BIL) | 170kV |
| Power Frequency Withstand Voltage | 70kV (1 Minute) |
| Mechanical Life | ≥10,000 Operations |
| Electrical Life | E2 Class |
| Opening Time | ≤40ms |
| Closing Time | ≤70ms |
| Automatic Reclosing Sequence | 1~4 Shots Programmable |
| Dead Time Setting | User Programmable |
| Protection Relay | Digital Microprocessor Controller |
| Control Voltage | 24VDC / 48VDC / 110VDC / 220VDC |
| Communication Protocol | IEC61850, IEC60870-5-101/104, Modbus, DNP3 |
| Ingress Protection | IP65 Control Cabinet |
| Operating Temperature | -40℃ to +60℃ |
| Relative Humidity | Up to 100% |
| Installation Altitude | ≤2000m (Customized Available) |
| Applicable Standards | IEC 62271-100, IEC 62271-111, IEEE C37.60, GB/T 1984 |
| Feature | Our Automatic Reclosing Circuit Breaker | Traditional Circuit Breaker |
|---|---|---|
| Automatic Fault Recovery | Yes | No |
| Temporary Fault Restoration | Automatic | Manual Operation Required |
| SCADA Integration | Standard | Usually Optional |
| Remote Monitoring | Real-Time | Limited |
| Protection Functions | Multi-function Digital Relay | Basic Protection Only |
| Maintenance Requirement | Very Low | Higher |
| Grid Automation Compatibility | Excellent | Limited |
| Power Supply Reliability | Improves Network Availability | Only Interrupts Faults |
| Life Cycle Cost | Lower | Higher |
A standard vacuum circuit breaker interrupts fault current and remains open until manually or remotely closed. A 33KV Automatic Reclosing Circuit Breaker automatically attempts to restore power after temporary faults using programmable reclosing sequences, significantly improving system reliability.
The controller typically supports one to four programmable reclosing attempts with adjustable dead times, lockout logic, and customized protection settings according to utility requirements.
Yes. The intelligent controller supports IEC61850, IEC60870-5-101/104, Modbus, DNP3, Ethernet, fiber optic communication, and optional 4G/5G wireless communication for smart grid applications.
Absolutely. It is widely used in solar farms, wind power stations, battery energy storage systems (BESS), and renewable energy collection networks where automatic fault recovery is essential for maximizing system availability.
The sealed vacuum interrupter requires virtually no maintenance. Periodic inspection is generally limited to the operating mechanism, communication module, auxiliary batteries (if equipped), and routine functional testing.
Yes. Protection parameters, reclosing logic, communication protocols, event recording, and control functions can all be configured according to project specifications or utility standards.
We are a professional China manufacturer specializing in intelligent medium-voltage automatic reclosing circuit breakers for global utilities and EPC contractors. We provide complete OEM and ODM services including customized protection logic, communication protocols, enclosure design, CT/PT configuration, mounting structures, branding, multilingual documentation, and factory acceptance testing (FAT). Every breaker undergoes comprehensive routine testing before shipment to ensure long-term operational reliability in demanding outdoor environments.
