The ZW20A-12 Intelligent Distribution Pole Mounted Circuit Breaker, manufactured by China's Jinhand Electrical, is designed for 12kV/50Hz systems. As a leading factory and supplier, we provide this integrated solution with high-precision sensors for distribution automation, line loss management, and fault handling.
1.Integrated Design: The circuit breaker features a fully integrated design along with high-precision voltage and current sensors, enhancing overall functionality and reducing installation complexity.
2.Support for Smart Distribution: Meets the requirements for smart distribution systems, enabling efficient management of line loss, feeder automation, and handling of small-current single-phase grounding faults.
3.Flexible Installation: Suitable for installation at various points such as section points, tie points, branch lines, and user outlet heads on 10kV overhead lines, providing versatility in application.
| Project | Unit | Parameter | ||
| Rated Voltage | kV | 12 | ||
| Rated Current | A | 630 | ||
| Rated Frequency | Hz | 50 | ||
| RatedInsulation Level | Main Circuit 1min PowerFrequency Withstand Voltage | Phase-to-phase,phase-to-ground | kV | 42 |
| Contact gap | 48 | |||
| Lightning Impulse Withstand Voltage(Peak) | Phase-to-phase,phase-to-ground | 75 | ||
| Contact gap | 85 | |||
| Secondary Circuit 1min Power Frequency Withstand Voltage | 2 | |||
| Rated Short-Circuit Breaking Current(RMS) | kV | 20、25 | ||
| DC Component of Rated Short-Circuit Breaking Current | % | 51 | ||
| DC Time Constant of Rated Short-Circuit Breaking Current | ms | 45 | ||
| Rated Short-Circuit Making Current(Peak) | kA | 50、63 | ||
| Rated Short-Time Withstand Current(RMS) | kA | 20、25 | ||
| Rated Peak Withstand Current | kA | 50、63 | ||
| Number of Rated Short-Circuit Breaking Operations | Times | 30 | ||
| Rated Short-Circuit Duration | S | 4 | ||
| Mechanical Life | Times | ≥10000 | ||
| SF6 Gas Rated Gauge Pressure | MPa | 0 | ||
1.Advanced Measurement and Control: Features line fault recording (SOE) capability, which captures the timing and nature of faults (grounding or short-circuit), aiding in effective troubleshooting and maintenance.
2.Reliable Sealing Performance: Equipped with mature sealing shell technology boasting an IP67 protection rating, ensuring robust sealing, high airtightness, and mechanical strength through one-step mold-stretching forming technology.
3.Maintenance-Free Operation: Components are sealed in SF6 gas at zero gauge pressure, protecting them from environmental influences and guaranteeing stable, reliable, and maintenance-free operation.
4.Excellent Insulation Performance: Supports cable connections for incoming and outgoing lines, employing patented fluid silicone rubber corner bushings to achieve a phase spacing of 280mm, ensuring superior external insulation capabilities.
1.Intelligent Integrated Design: Integrated high-precision voltage and current sensors support distribution automation, line loss management, and fault handling.
2.High Reliability and Breaking Performance: Rated short-circuit breaking current up to 20/25 kA, mechanical life exceeding 10,000 operations, suitable for frequent switching scenarios.
3.Flexible Installation Configuration: Suitable for various locations on 10kV overhead lines, such as section points, tie points, branch lines, and user outlets, supporting multiple networking modes.
4.Maintenance-Free SF₆ Insulation: Zero-gauge SF₆ gas insulation, fully sealed structure with high protection rating, adaptable to harsh outdoor environments.
5.Capable of Small-Current Ground Fault Handling: Able to detect and isolate single-phase ground faults, improving power supply reliability in distribution networks.
1.Maintenance-Free Throughout Lifecycle: Sealed SF₆ insulation design eliminates the need for regular gas replenishment or insulation replacement, significantly reducing maintenance effort.
2.Remote Monitoring and Diagnostics: Integrated communication interfaces support remote data upload and fault alerts, enabling condition-based maintenance and reducing on-site inspection frequency.
3.Modular and Interchangeable Design: Functional modules support quick on-site replacement, minimizing downtime and improving maintenance efficiency.
1.Standardized Pole-Mounted Installation: Complete set of mounting brackets, fittings, and accessories provided for easy installation on various pole structures.
2.Lightweight and Compact Design: Compact overall structure with optimized weight for ease of transport and installation during aerial work.
3.Global Logistics Experience: Exported to over 30 countries, familiar with international shipping standards, providing professional packaging and customs clearance support.
1.High Environmental Adaptability: Stable operation in temperatures from -40°C to +70°C and altitudes up to 4000m, with protection rating up to IP67.
2.Strong Electrical Insulation Performance: Lightning impulse withstand voltage 85kV, power frequency withstand voltage 48kV, suitable for harsh environments such as thunderstorm-prone and humid areas.
3.Robust Mechanical Structure: Housing made of high-strength aluminum alloy with anti-corrosion treatment, resistant to vibration and wind, suitable for long-term outdoor operation.
1.Fully Automated Assembly Line: Key components assembled using robotic welding, automatic gas filling, and testing processes to ensure product consistency.
2.Stringent Sealing Process: SF₆ filling and sealing performed in a cleanroom environment, with helium mass spectrometry leak detection to ensure lifelong sealing.
3.Integrated Sensor Technology: Voltage and current sensors are encapsulated with the breaker body, avoiding installation errors associated with external transformers.
1.Deep Primary-Secondary Integration: Built-in high-precision sensors output digital signals directly, improving measurement accuracy and system integration. 2.Intelligent Fault Handling Logic: Includes ground fault detection, automatic reclosing, and fault isolation functions, supporting communication-free local automation. 3.Seamless Dual-Source Switching: Suitable for tie-point applications, enabling automatic supply transfer upon voltage loss to improve power continuity.
1.SF₆ Leak-Free Design: Zero-gauge sealing technology prevents greenhouse gas emissions, ensuring environmental compliance.
2.Low-Energy Operating Mechanism: Utilizes permanent magnet or spring operating mechanisms with low energy consumption and long service life.
3.Recyclable Materials: Main structural components made from recyclable aluminum alloy, aligning with green manufacturing principles.
1.Specialized in Pole-Mounted Equipment: Over a decade of experience in distribution pole-mounted switches, with products extensively field-validated and optimized.
2.Complete Automation Solutions: Provides not only the circuit breaker but also matching FTU, communication terminals, and master station systems for integrated solutions.
3.Rigorous Quality Control System: Full-process control from component selection to final testing ensures high product reliability.
4.Global Service Network: Technical support points in multiple countries provide localized commissioning, training, and after-sales support.
Through over ten years of consistent development, Jinhand ranks among China’s top manufacturers and suppliers of electrical equipment. Our factory has adopted various cutting-edge technologies and facilities, and we invite you to procure our high-quality, cost-effective products manufactured in China.
Address
No. 188, Wei 15th Road, Yueqing City, Wenzhou City, Zhejiang Province, China
