Where is a dead-front elbow arrestor typically used?

A dead-front elbow arrestor is specifically designed for use in underground distribution systems. This type of arrestor provides protection for underground cable systems from voltage surges that may arise from lightning strikes or switching operations. The "dead-front" design means that the arrestor can be made safe for maintenance without the risk of exposing energized parts, making it ideal for use in locations where personnel may be working close to the equipment.

This is crucial in underground installations where access is limited and safety is a primary concern. Furthermore, the protection it offers contributes to the overall reliability of underground systems, which are often more vulnerable to faults due to their enclosed nature.

In contrast, overhead distribution systems and power lines do not typically require the same type of protective equipment, as lightning arrestors in those contexts are designed differently to accommodate aerial positioning. Transmission towers also utilize different types of surge protection suitable for their operational environments and the different voltages involved. Therefore, underground distribution systems are where dead-front elbow arrestors are most appropriately utilized, ensuring both safety and equipment longevity.