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SPD vs Thunder Arrestor: Key Electrical Safety Differences

SPD vs Thunder Arrestor: Understanding the Difference & Similarities

Breezent Electric | Igniting Skills, Wiring Dreams ⚡

Introduction

When it comes to protecting your electrical system, two terms often surface: SPD (Surge Protective Device) and Thunder Arrestor (Lightning Arrester). Though they share similar goals — protection from high voltages — they operate in different ways. Let's break it down.

What is an SPD?

A Surge Protective Device protects appliances and electrical systems from transient voltage spikes, usually caused by lightning, switching, or grid faults. It redirects excess voltage safely to the ground before it can damage equipment.

What is a Thunder Arrestor?

A Thunder or Lightning Arrestor is designed to protect structures and equipment from direct lightning strikes. It conducts the lightning current directly into the earth before it can enter the system.

Key Differences Between SPD and Thunder Arrestor

  • Function: SPD handles internal & external surges; Thunder Arrestor handles direct lightning.
  • Location: SPD is installed at the distribution board; Thunder Arrestor is mounted externally (roof, poles).
  • Response Time: SPD reacts to spikes; Arrestor reacts instantly to lightning.

Similarities

  • Both reduce voltage risk.
  • Both protect equipment and infrastructure.
  • Both are vital for complete lightning protection strategies.

Conclusion

For full protection, combine both SPD and Thunder Arrestor. The Thunder Arrestor tackles direct lightning, while the SPD guards your electronics from internal surges. Breezent Electric ensures both are installed safely and professionally for peace of mind. ⚡

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