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The 33kV Single Pole Outdoor Circuit Breaker is designed for reliable switching and protection in medium-voltage overhead distribution systems. It is widely used to interrupt load current, fault current, and short-circuit conditions in modern power networks. With a robust outdoor structure and optimized arc-extinguishing performance, this equipment ensures stable operation even under harsh environmental conditions.
Built with a permanent magnet operating mechanism and high-strength insulation components, the 33kV Single Pole Outdoor Circuit Breaker delivers fast response, long service life, and minimal maintenance requirements, making it suitable for utility grids, substations, and industrial power distribution systems.
|
Project |
Numerical Value |
|
Rated Voltage |
35 kV |
|
Rated Current |
630/1250A |
|
Rated Frequency |
50/60Hz |
|
1-Minute Power-Frequency Withstand Voltage |
80/95 kV |
|
Lightning Impulse Withstand Voltage (Peak) |
185 kV |
|
Rated Short-Circuit Breaking Current |
20/25/31.5 kA |
|
Rated Short-Circuit Making Current (Peak) |
80 kA |
|
Rated Peak Withstand Current |
80 kA |
|
4S Short-Duration Withstand Current |
31.5 kA |
|
Rated Operating Cycle |
Open–0.3s–Close/Open–180s–Close/Open–180s–Close/Open–60s–Restore |
|
Rated Short-Circuit Breaking Operations |
30 times |
|
Mechanical Life |
20,000 times |
|
Permanent Magnet Mechanism Control Voltage |
DC220V |
|
Secondary Circuit 1-Minute Power-Frequency Withstand Voltage Test |
2 kV |
|
Parameter Name |
Data |
|
Contact Gap |
18±1 mm |
|
Contact Overtravel |
4±0.5 mm |
|
Opening Speed |
1.4-1.8m/s |
|
Closing Speed |
0.8-1.2m/s |
|
Contact Closing Bounce Time |
<=5 ms |
|
Phase-to-Phase Center Distance |
560±2 mm |
|
Three-Phase Switching Asynchrony |
<=3 ms |
|
Phase-to-Phase Conducting Loop Resistance |
µΩ |
|
Closing Time |
25-45 ms |
|
Opening Time |
20-45 ms |
|
Weight |
100 Kg |
Proper installation of the 33kV Single Pole Outdoor Circuit Breaker is essential to ensure long-term reliability and safe operation. The unit should be installed on a stable pole structure or steel frame with correct grounding connection.
After installation, a no-load switching test should be performed to ensure smooth operation and correct timing of the mechanism.
1. Ambient air temperature: -30°C to +60°C;
2. Altitude: Not exceeding 2000 meters;
3. Wind speed: Not exceeding 34 m/s;
4. Vibration or seismic activity originating from outside the switchgear and control equipment is negligible;
5. Pollution degree: Level IV;
6. Storage temperature: -40°C to +85°C.
Q1: What is the main function of a 33kV Single Pole Outdoor Circuit Breaker?
A: It is used to interrupt and isolate fault currents in medium-voltage overhead distribution systems, ensuring safe grid operation and protection of downstream equipment.
Q2: Can this circuit breaker operate in harsh outdoor environments?
A: Yes, it is designed for high pollution, strong wind, and wide temperature variations, making it suitable for long-term outdoor use.
Q3: Does the 33kV Single Pole Outdoor Circuit Breaker require regular maintenance?
A: The design is maintenance-free under normal operating conditions, thanks to its sealed mechanism and durable components.
Q4: What type of installation method is recommended?
A: Pole-mounted installation with secure grounding is recommended for optimal safety and performance.
Q5: What protection level does it support?
A: It is designed for high insulation and pollution resistance, suitable for Level IV pollution environments.
Address
Jinlu Industrial Zone, Beibaixiang Town, Yueqing City, Wenzhou City, Zhejiang Province, China
