Substation Class Disconnect Switches
Operational reliability and long life is paramount
Long term reliability of the device is paramount when choosing disconnect switches. It is a safety device. If the disconnect switch does not operate, the utility has to take a much wider outage to service the equipment, causing substantial outages and loss of revenue. History of the switch design and its performance reliability should be key factors in evaluating the switch selected.
The key design characteristics to evaluate include current transfer junctions, overload capability and ruggedness.
Disconnect Switches come in many configurations. The most rugged of these designs are the vertical break and double side break configurations. These two configurations also require the least amount of space in a station.