ZW43R-24 Series auto recloser with intelligent controller is a 24kV three-phase AC 50Hz outdoor high-voltage vacuum circuit breaker, which integrates vacuum arc-extinguishing technology and intelligent control technology. As core switching and protection equipment for outdoor overhead distribution networks, it undertakes the key tasks of line switching, overload protection and short-circuit protection. It forms a full-scenario, high-reliability distribution protection system with three supporting protective devices: High Voltage Polymer Surge Arrester, Expulsion Outdoor Fuse Cutout and H3 Phases High Voltage Temporary Short Circuit Earthing Sets. It is widely used in substations, industrial and mining enterprise power distribution and rural power grids with frequent operation demands, providing stable and efficient protection for medium-voltage distribution networks in complex outdoor environments.

Core Parameters & Service Environment

Basic Technical Parameters

• Rated voltage: 24kV, three-phase AC 50Hz outdoor distribution equipment.
• Core function: Realize reliable breaking and closing of load current, overload current and short-circuit current.
• Application scope: Substation distribution, industrial and mining power supply, rural power grid frequent operation occasions.

Adaptable Environmental Conditions

ZW43R-24 series is designed for extreme outdoor environments, with strict environmental adaptability to ensure long-term stable operation:

• Ambient air temperature: -45ºC ~ +45ºC, stable performance under ultra-large temperature difference.
• Humidity: Monthly average humidity 95%, daily average humidity 90%, good sealing to resist moisture intrusion.
• Installation altitude: Max. 2500 meters, suitable for plateau area distribution.
• Ambient air: Free from obvious corrosive and flammable gas/vapor pollution.
• Wind resistance: Wind speed ≤35m/s, mechanical structure is firm and wind-resistant.
• Anti-contamination: Grade IV anti-pollution level, adapting to industrial and coastal polluted areas.
• Seismic performance: Adapt to seismic intensity ≤8 degrees, safe in earthquake-prone areas.

Supporting Key Protective Devices

High Voltage Polymer Surge Arrester

High Voltage Polymer Surge Arrester is the core overvoltage protection component matched with ZW43R-24 auto recloser. It takes zinc oxide varistor with strong nonlinear resistance as the core, and adopts polymer composite housing with excellent weather resistance. Under normal working voltage, it is in a high-resistance insulation state without affecting line operation; when lightning surge, switching overvoltage and other transient overvoltages invade, its resistance drops rapidly in nanoseconds, discharging surge current to the ground and clamping voltage to a safe range. It effectively prevents the vacuum interrupter and control components of the auto recloser from insulation breakdown, and provides all-round overvoltage protection for 24kV distribution lines in outdoor harsh environments.

Expulsion Outdoor Fuse Cutout

Expulsion Outdoor Fuse Cutout acts as backup overcurrent protection for ZW43R-24 auto recloser, forming a dual-level protection system. Installed on the overhead line side, it uses fuse element to sense fault current: when overload or short-circuit current exceeds the limit, the fuse melts rapidly, and generates deionizing gas to extinguish arc quickly, realizing fault isolation. After operation, the fuse tube drops obviously, which is convenient for O&M personnel to locate faults quickly. It is responsible for cutting off permanent faults that cannot be eliminated by reclosing, avoiding fault expansion and protecting transformers and branch lines, which is an indispensable backup protection for distribution networks.

H3 Phases High Voltage Temporary Short Circuit Earthing Sets

H3 Phases High Voltage Temporary Short Circuit Earthing Sets is a special safety device for maintenance of ZW43R-24 auto recloser and lines. When the line is powered off for overhaul, it connects three-phase conductors to the grounding grid simultaneously, forming three-phase short circuit and equipotential connection with the earth. It can eliminate residual charge and induced voltage completely, and prevent personal injury caused by accidental power transmission. The product adopts high-conductivity soft copper cable and reliable grounding clamp, with strong short-circuit tolerance and stable contact, providing a mandatory safety guarantee for on-site maintenance operations in strict accordance with power safety specifications.

Core Value of Intelligent Controller

The intelligent controller is the control core of ZW43R-24 series auto recloser, realizing intelligent judgment and automatic operation of distribution network faults. It collects current and voltage data in real time, and quickly identifies fault types through built-in algorithms: for transient faults such as lightning and bird damage, it automatically completes tripping and reclosing to restore power supply quickly; for permanent faults, it locks reclosing to avoid repeated closing and aggravating equipment damage. The controller supports remote signaling, telemetry and remote control, and can connect with distribution automation system to realize remote monitoring, fault location and predictive maintenance. This greatly reduces manual inspection workload and outage time, and improves the intelligence and reliability of rural and industrial distribution networks.

Everyday Impact

ZW43R-24 Series auto recloser with intelligent controller and its supporting High Voltage Polymer Surge Arrester, Expulsion Outdoor Fuse Cutout and H3 Phases High Voltage Temporary Short Circuit Earthing Sets build a full-cycle protection system for 24kV outdoor distribution networks. It reduces line outage frequency and duration, avoids equipment damage and large-scale power outages caused by overvoltage, overcurrent and misoperation, and provides stable power supply for industrial production, rural life and urban distribution. The equipment's strong environmental adaptability and intelligent operation reduce grid O&M costs, and provide reliable support for the stable operation of medium-voltage distribution networks in complex environments.

Media Contact
Company Name: Ningbo Jusmmile Outdoor Gear Co., Ltd.
Email: Send Email
Phone: +8613065600656
Address:No. 70, TianJian Lane, ShouNan Street, Yinzhou District
City: Ningbo
Country: China
Website: https://www.jusmmile.com/