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The 12KV Pole Mounted Circuit Breaker is specifically designed for overhead medium-voltage distribution systems where space efficiency, fast fault isolation, and long-term outdoor reliability are essential. Installed directly on utility poles, this breaker provides a practical solution for feeder protection, sectionalizing, transformer protection, and distribution automation applications without requiring additional switchgear buildings or large ground installations.
Unlike conventional ground-mounted switching equipment, the 12KV Pole Mounted Circuit Breaker combines compact mechanical structure with advanced vacuum interruption technology, allowing utilities to achieve reliable protection with reduced installation complexity. The sealed vacuum interrupter delivers rapid arc extinction, excellent dielectric recovery, and long electrical endurance while eliminating the maintenance requirements associated with oil-insulated breakers.
Designed for modern smart grid applications, this pole-mounted solution supports intelligent controllers, remote communication, automatic reclosing, and real-time operating data monitoring. It enables utilities to improve feeder reliability, shorten outage duration, and optimize maintenance efficiency in rural, urban, and industrial distribution networks.
Overhead distribution networks require switching equipment that can withstand continuous exposure to weather conditions while maintaining stable electrical performance. The 12KV Pole Mounted Circuit Breaker adopts a lightweight yet durable structure that simplifies transportation, lifting, and installation on standard utility poles.
| Installation Requirement | Design Feature | Customer Benefit |
|---|---|---|
| Limited installation space | Compact pole-mounted structure | Reduces construction requirements and installation cost |
| Outdoor exposure | IP65 weatherproof enclosure and sealed components | Reliable operation under rain, dust, and pollution |
| Remote network management | Integrated intelligent controller interface | Supports smart grid automation |
| Difficult maintenance access | Maintenance-free vacuum interrupter | Reduces field inspection frequency |
| Temporary feeder faults | Automatic reclosing capability | Restores power without manual operation |
The 12KV Pole Mounted Circuit Breaker uses a high-performance vacuum interrupter as the primary switching element. The vacuum chamber provides a clean and stable interruption environment, allowing the breaker to interrupt fault currents quickly while minimizing contact erosion.
The vacuum interrupter uses copper-chromium alloy contacts and ceramic insulation technology to achieve excellent electrical endurance. Since there is no insulating oil or SF6 gas involved, the breaker offers environmentally friendly operation, simplified maintenance procedures, and improved safety for installation personnel.
The integrated control system transforms the 12KV Pole Mounted Circuit Breaker from a simple switching device into an intelligent distribution automation terminal. The protection controller continuously monitors electrical conditions and executes predefined protection strategies according to grid requirements.
| Protection Function | Description |
|---|---|
| Overcurrent Protection (50/51) | Detects phase faults and disconnects abnormal current conditions. |
| Earth Fault Protection (50N/51N) | Provides sensitive protection against grounding failures. |
| Automatic Reclosing | Automatically restores power after temporary line faults. |
| Event Recording | Stores operation history and fault information for analysis. |
| Remote Communication | Supports DNP3, Modbus, and IEC communication protocols. |
| Load Monitoring | Enables current and voltage measurement for grid management. |
| Parameter | Specification |
|---|---|
| Rated voltage | 12 kV |
| Rated frequency | 50 / 60 Hz |
| Rated continuous current | 630 A / 1250 A |
| Rated short-circuit breaking current | 20 kA / 25 kA |
| Rated short-circuit making current | 50 kA / 63 kA peak |
| Power frequency withstand voltage | 42 kV (1 minute) |
| Lightning impulse withstand voltage | 75 kV BIL |
| Mechanical endurance | 10,000 operations (M2 class) |
| Automatic reclosing cycles | Up to 4 programmable shots |
| Opening time | ≤45 ms |
| Closing time | ≤80 ms |
| Operating sequence | O-0.3s-CO-15s-CO |
| Control voltage | 24V DC / 48V DC / 110V DC / 220V AC-DC |
| Ambient temperature | -40°C to +55°C |
| Protection degree | IP65 |
| Installation type | Pole mounted overhead installation |
Every component of the 12KV Pole Mounted Circuit Breaker is selected for outdoor durability and electrical stability. The combination of solid insulation, corrosion-resistant enclosure, and high-performance switching components ensures reliable operation throughout years of field service.
| Component | Material / Technical Feature |
|---|---|
| Vacuum Interrupter | CuCr contact material, ceramic envelope, high vacuum sealed chamber |
| Insulation System | Cycloaliphatic epoxy resin with excellent hydrophobic performance |
| External Enclosure | 316L stainless steel, corrosion resistant, IP65 protection |
| Current Transformer | 5P20 / 0.5FS5 dual ratio CT options |
| Voltage Sensor | Capacitive voltage divider for voltage detection and synchronization |
| Operating Mechanism | Magnetic actuator or motor-charged spring mechanism |
The 12KV Pole Mounted Circuit Breaker is widely used in distribution networks requiring reliable overhead switching and intelligent protection. Its compact design and automation capability make it suitable for a wide range of applications.
Each 12KV Pole Mounted Circuit Breaker undergoes strict factory testing to ensure electrical safety, mechanical reliability, and communication performance before delivery. Testing procedures are carried out according to international medium-voltage equipment standards.
As a professional medium-voltage electrical equipment manufacturer, we provide reliable 12KV Pole Mounted Circuit Breaker solutions for utilities, EPC contractors, industrial users, and renewable energy developers worldwide. Our products combine vacuum switching technology, intelligent automation functions, rugged outdoor construction, and flexible customization options.
We support OEM/ODM manufacturing, technical documentation, project engineering assistance, factory acceptance testing, and global delivery services. Contact us today for detailed specifications, drawings, quotation, and professional support for your overhead distribution protection projects.
