The 24kV polymer arrester is the core equipment of lightning protection for transmission lines (22-24kV system), which adopts silicone rubber composite jacket and metal oxide resistor (MOV) technology to achieve rapid discharge of lightning current (≤25μs) and operational overvoltage suppression. Key benefits include:
All-condition protection: lightning impulse current (10/350μs) withstand ≥25kA, operating overvoltage (250/2500μs) protection level ≤65kV.
Environmental adaptability: Silicone rubber jacket is UV-resistant (UV-C grade), salt spray resistant (C5 grade), suitable for -50°C to +80°C environment.
Maintenance-free design: Sealed construction (IP68) with a ≥ life of 25 years and no risk of leakage.
Typical Applications:
Direct lightning protection of transmission line towers
Cable termination splice overvoltage protection
Suppression of lightning intrusion waves in and out of substation lines
Wind farm collector line multi-mine area protection
| parameter | Technical Indicators |
| System nominal voltage | 24kV (maximum continuous operating voltage 24/√3=13.9kV) |
| Nominal Discharge Current (In) | 10kA (8/20μs waveform) |
| Residual pressure of lightning impact | ≤85kV (10kA, 8/20μs) |
| Operational impact residual pressure | ≤65kV (2kA, 30/60μs) |
| High current impulse resistance | 65kA (4/10μs, 2 times) |
| Coat material | HTV silicone rubber (tear strength ≥ 8kN/m) |
| Creepage distance | ≥630mm (anti-fouling flashover design, suitable for grade IV dirt area) |
| Pressure release rating | 40kA (short-circuit current, 0.2s) |
| weight | 4.5-5.5kg |
