Functions of Aluminum-Plastic Hook for Detachable Zinc Oxide Arrester

1. Quick detachable installation and live-line operation

   The hook forms a pluggable and reversible mechanical connection with the bracket or insulator. Operators can install, remove, overhaul, and replace the arrester with an insulating operating rod without power outage, ensuring continuous power supply.
2. Mechanical support and positioning

   The aluminum part provides sufficient strength to bear the arrester’s weight, wind load, vibration, and short-circuit electromotive force. The assembly accurately positions the arrester to ensure reliable contact between high-voltage terminals and the line.
3. Automatic disconnection in case of failure

   When the arrester breaks down (puncture, aging, overheating), the thermal disconnector actuates to unlock the hook, making the faulty arrester drop automatically. This isolates the fault and prevents accidents such as line burnout. The dropped state is visible for quick fault location.
4. Electrical connection and current conduction

   It ensures reliable electrical connection between the arrester’s grounding terminal and the grounding circuit, allowing lightning current and fault current to discharge safely to the ground.
5. Insulation protection and corrosion resistance

   The plastic part provides electrical insulation, prevents phase-to-phase or ground short circuits, reduces weight, and improves anti-corrosion and anti-pollution performance. The aluminum structure conducts electricity and dissipates heat effectively.