Overview
The single-phase automatic recloser is a specialized protective device installed on overhead power lines to minimize outage durations. It operates by automatically disconnecting the circuit during a fault (e.g., lightning strikes or tree contact), then attempting to restore power after a preset delay if the fault clears. Unlike fuses, reclosers prevent prolonged outages for transient issues, significantly improving grid reliability. Modern versions integrate microprocessor controls for customizable trip sequences (e.g., 1–4 reclosures before lockout) and communicate with SCADA systems. They are widely adopted in rural and urban distribution networks due to their ability to differentiate between temporary and permanent faults.
Structure and Working Principle
A recloser consists of a vacuum interrupter or SF6 chamber for arc quenching, a control unit with fault-detection algorithms, and sensors to monitor current/voltage. When a fault occurs, the device opens within milliseconds, de-energizing the line. After a programmable delay (typically 0.5–30 seconds), it recloses to test if the fault persists. The mechanism leverages spring-operated or hydraulic mechanisms for rapid switching. Advanced models include GPS synchronization for coordinated operations across multiple reclosers. Key components like current transformers and voltage sensors ensure accurate fault detection while minimizing nuisance tripping.
Key Features
Compact single-phase reclosers are designed for easy pole-mounting, with weights typically under 100 kg. Their enclosures meet IP65 standards for dust/water resistance, crucial for outdoor installations. Programmable logic allows utilities to set trip curves matching feeder characteristics (e.g., inverse-time or definite-time). Many support IEC 61850 communication protocols for remote configuration and real-time diagnostics. Some include battery backup for 48+ hours of operation during grid outages. High interrupting ratings (e.g., 12.5 kA) handle most distribution-level faults, while modular designs simplify maintenance.
Application Areas
Primary applications include radial distribution feeders, especially in areas prone to transient faults like forests (animal contacts) or coastal regions (salt spray). They protect transformers and downstream equipment by isolating faults before damage occurs. Utilities deploy them at feeder branches to sectionalize grids, limiting outage scopes. Renewable energy integrations often use reclosers for anti-islanding protection. Industrial parks favor them for critical circuit protection where manual resetting is impractical.
Maintenance and Precautions
Annual maintenance includes contact resistance tests, insulation checks, and lubrication of mechanical parts. Moisture indicators should be monitored; silica gel breathers may require replacement. Manufacturers recommend verifying calibration every 3–5 years using primary injection test sets. Avoid installing near corrosive environments without protective coatings. During procurement, ensure compatibility with existing feeder reclosing schemes to prevent miscoordination. Always de-energize before servicing, and follow lockout/tagout procedures.
B2B Procurement Guide
When sourcing reclosers, specify voltage ratings (e.g., 15 kV or 27 kV), interrupting capacity, and control options (e.g., hydraulic vs. electronic). Request type-test reports for IEC 60265-1 or ANSI C37.60 compliance. Bulk buyers (10+ units) may negotiate 10–15% discounts. Leading manufacturers include NOJA Power, G&W Electric, and Schneider Electric. Consider total cost of ownership—features like self-diagnostics reduce lifecycle costs. For projects in humid climates, opt for stainless steel hardware and hydrophobic coatings.
Related Manufacturers
- 主营：zw7柱上、看门狗、zw32-35gg、柱上室外重合器、熔断器、双电源、控制器、保护器、接触器、电动机、监控器、断路器、10kv柱上、35kv真空、柱上35kv、zw32-40.5gg、分界真空、户内手车、户内高压、马达过载、高压开关、微机监控、电机故障、过载欠压、侧装开关、高压真空接触器
- 主营：保护器、高压开关、真空开关、高压单杆重合器、负荷开关、电动机监控器、真空接触开关、真空断路器、负荷开关熔断器组合开关、三工位断路器、接触器组合电气、熔断器组合电气、柱上真空断路器、35KV断路器、40.5KV断路器、电动机保护器、马达保护器、户外高压开关、马达监控器、微机保护器、户内真空断路器、永磁真空断路器、分界真空断路器、智能真空断路器、看门狗断路器
- 主营：10kv调压器、36kv调压器、调压器、重合器、6kv调压器
- 主营：断路器、万能式断路器、框架断路器、真空断路器、交流接触器、直流接触器、正泰电器、德力西电器
- 主营：高压真空断路器、高压充气柜、高压熔断器、10KV重合器、高压成套、高压隔离开关、负荷开关、环网柜、一二次融合断路器、非标充气柜、低压断路器、六氟化硫断路器
- 主营：捣固机、中继器、基地台、电磁阀、信号灯、传感器、接线盒、打磨机、输送机、显模块、凿岩机、切轨机、调节器、摄像仪、标识卡、变压器、控制器、保护器、调整机、手持机、控制箱、捣固镐、风速表、拨道机、破碎机
- 主营：光伏并网柜、光伏并网箱、光伏断路器
- 主营：隔离开关、真空断路器、避雷器、计量箱互感器、高低压开关柜
- 主营：漆包线
- 主营：电机保护器、相序继电器、马达保护器、缺相保护器、相序保护、交流接触器、水泵保护器、过欠压继电器、电动机保护器、浪涌保护器、电涌保护器、防雷器、避雷器、马达控制器
- 主营：拾音器、窗口对讲机、温湿度显示屏、IP网络对讲、防雷器、自动重合闸
- 主营：开关保护器、电源断路装置、三合一防雷器、电流保护断路器
- 主营：安防监控箱、电源重合闸、电源防雷器、信号防雷器、二合一防雷器
- 主营：cbn砂轮、etc系统、喷涂机、真空重合器、压缩机、过滤机、cpp薄膜、处理器、din导轨、led点胶、ac-600-ec、hay合并、cpu风扇、gige相机、adme毒物、ncov测定、dj控制器、pvd涂层机、端铣刀座、api连接器、led加热器、led楼梯灯、hsc起重机、电源模块、ccd摄像机、led固化灯
- 主营：小阀串、网络终端