What are Dielectric Gaes ?

What are Dielectric Gaes ?

Dielectric Gas Definition

A dielectric gas is defined as an insulating gas that prevents electrical discharge and can be polarized by an electric field.

Breakdown in Gases

Breakdown in gases occurs when the applied voltage exceeds the breakdown voltage, causing the gas to conduct electricity.

Paschen’s Law

This law states that the breakdown voltage depends on the product of the gas pressure and the gap length between electrodes.

Breakdown Mechanism

The breakdown mechanism varies based on the type of dielectric gas and the polarity of the electrodes; corona discharge is one such mechanism.

Properties of Dielectric Gases

• Utmost dielectric strength

• Fine heat transfer

• Incombustible

• Chemical idleness against the construction material used

• Inertness

• Environmentally non poisonous

• Small temperature of condensation

• High thermal constancy

• Acquirable at low cost

Applications of Dielectric Gases

Dielectric gases are used in high voltage applications such as transformers, radar waveguides, and circuit breakers due to their insulating properties.