A tool for calculation of relay settings for power transmission and sub-transmission substations.

This tool covers all the relays of the substations beginning with outgoing medium voltage feeders of sub-transmission substations to all the relays of transmission substations and power plant substations, including the relay types:

Line feeders protection

• Distance protection
• Over-current protection
• Line Differential protection
• Voltage and frequency protection
• Reclosers
• Breaker protection
• Teleprotection

Transformer feeders protection

• Over-current protection
• Transformer Differential protection
• Restricted earth fault protection (REF)
• Voltage and frequency protection
• Over-flux protection

Busbar protection

Reactor protection

Capacitor bank protection