What is a common characteristic of an arc gap in arresters?

A common characteristic of an arc gap in arresters is that it helps dissipate energy. When a surge of electrical energy occurs, such as during a lightning strike or other transient overvoltage, the arrester's design utilizes an arc gap to safely redirect and absorb the excess energy. This helps to prevent damage to equipment and maintain the stability of the electrical system.

The arc gap operates by creating a low-resistance path for the current to flow through when the voltage exceeds a certain threshold. As the high current passes through the gap, it generates an arc, which converts the surge energy into heat and light. This process effectively dissipates the energy that could otherwise flow into sensitive equipment.

Understanding the function of the arc gap is crucial, as it enables linemen and electrical technicians to ensure the integrity of the electrical system and protect against damage from voltage transients. Without this mechanism, equipment could be vulnerable to surges that could cause significant failures or outages.