What type of arrestor is characterized by a metal oxide varistor?

The type of arrestor that is characterized by a metal oxide varistor (MOV) is commonly referred to as an 8.4kV MOV arrestor. Metal oxide varistors are used for their ability to clamp voltage surges, effectively protecting equipment from transient overvoltages. These devices work by becoming conductive when the voltage exceeds a certain threshold, thereby diverting excess energy away from sensitive components.

In the context of the options provided, the 8.4kV MOV arrestor specifically utilizes this technology to manage voltage spikes within the specified range, making it a reliable choice for protecting electrical systems, particularly in distribution networks. The MOV's rapid response to voltage changes allows it to effectively mitigate the risk of equipment damage during surges, which is a critical functionality in maintaining the integrity of the electrical infrastructure.

Understanding the characteristics and applications of different types of arrestors is crucial for ensuring proper protection strategies in power systems, and the use of MOV technology is a common practice in many modern installations.