The Core Components Of A Tubular Surge Arrester: Gas Generating Tube + Inner/outer Gap

A standard 11kv 10ka lightning arrester protects electrical infrastructure from high-voltage overvoltage spikes. This apparatus mitigates the destructive effects of lightning strikes by directing excessive currents into the ground, preventing the destruction of transformers and overhead lines.

How a Tubular Lightning Arrester Works

A tubular lightning arrester consists of a gas-generating tube, an inner spark gap, and an outer spark gap. When a surge occurs, the outer and inner gaps break down simultaneously, generating an electrical arc that triggers gas production to extinguish the fault current.

The Role of the Gas-Generating Tube

The gas-generating tube is the primary arc-extinguishing element. High-temperature arcs volatilize the inner wall of the tube, creating high-pressure gas that blows the arc out through the exhaust vent.

• Material: Vulcanized fiber or specialized organic plastics.

• Function: Generates high-pressure gas under intense arc heat.

• Mechanism: Rapid deionization interrupts the continuous power-frequency current.

Function of Inner and Outer Spark Gaps

Spark gaps prevent system voltage degradation during normal operation and isolate the tube post-extinction.

1. Outer Gap: Separates the line from the arrester, preventing continuous system voltage from stressing the tube.

2. Inner Gap: Positioned inside the tube to subject the arc directly to the gas-generating material.

Technical Specifications and Variations

Selecting an 11kv lighting arrester requires matching grid parameters with environmental conditions. Different configurations alter the 11kv surge arrester response during an overvoltage event.

When assessing 11kv lighting arrester price or 11kv lightning arreaster price options, mechanical durability of the gaps and gas tube composition determine the operational lifespan of the unit in utility substations.