Medium Voltage Surge Arresters

Medium voltage surge arresters are vital protective components for 10-35kV power distribution systems, specially designed to shield electrical facilities from hazardous transient overvoltages triggered by lightning strikes and switching actions. As the first line of defense for medium-voltage power grids, they prevent equipment failure, minimize power outages and ensure stable operation of urban and rural distribution networks.

Key Deployment Scenarios

Overhead Distribution Line Protection

Installed on trunk lines, branch lines and line corners of 10-35kV overhead distribution networks, medium voltage surge arresters effectively suppress lightning-induced instantaneous overvoltages. They avoid line insulation breakdown and equipment damage, ensuring continuous power delivery along major transmission routes.

Critical Equipment Inlet/Outlet Protection

Fitted at the inlet and outlet ends of core facilities including medium-voltage distribution transformers, switchgears and cable terminations, these arresters absorb energy from both switching and lightning overvoltages, forming a firm protective shield for key power equipment.

Substation Internal Protection

Used on busbar sections, secondary circuits of instrument transformers and reactive power compensation devices in 10-35kV substations, they run steadily under rated operating voltage and avert permanent damage to precision measuring and control devices inside substations.

Outdoor and Hybrid Network Protection

They are ideal for safeguarding outdoor pole-mounted equipment and connection points between cables and overhead lines in urban and rural distribution networks. With excellent weather resistance, they perform reliably in severe outdoor conditions and deliver full-range overvoltage protection for scattered power distribution sites.

Distinctive Performance Advantages

Medium voltage surge arresters boast four core superior properties, making them an ideal solution for overvoltage protection:

Superior Protective Performance

Built with advanced gapless zinc oxide cores, they feature outstanding non-linear volt-ampere properties. They keep ultra-low leakage current within microampere to milliampere ranges under normal operating voltage. When overvoltage arises, their resistance declines instantly to discharge surplus energy quickly and achieve rapid protection.

Excellent Adaptability and Operational Stability

Supplied with silicone rubber composite or porcelain housings, they have excellent sealing capacity to resist harsh environments like high humidity and heavy pollution. Their rated voltages are perfectly compatible with medium-voltage power systems, enabling easy and flexible installation.

Low Maintenance and High Cost Efficiency

Owing to their simple and lightweight structure, medium voltage surge arresters need no complex daily maintenance, only routine visual inspections. Faulty products can be replaced quickly, which largely reduces maintenance workload and operating costs during the whole service life.

High Safety and Operational Reliability

Different from traditional surge arresters, the gapless structure rules out common faults such as gap aging and insulation failure, greatly enhancing protective stability and prolonging service life. They match well with other distribution network devices and effectively raise the overall insulation level of the whole power grid.