Protective relays for monitoring distribution control systems

Monitoring the state of distribution lines is a requirement for stable electric power supply

Protective relays are used as a reply relay in the mobile unit of the monitoring control system for long-distance power distribution lines that provide detecting function of ground faults and short circuit faults. The mobile unit is mounted on the electric pole and operates the switch via long-distance controls from the branch office so faults can be detected early. Relays incorporating Bestact reeds are often used for this application.