Under Frequency | Negative Sequence Relay
Under Frequency Relay Frequency based relays can either be under frequency relay or over frequency…
Static relays
Advantages of static relays • Due to the amplification of energizing signals obtainable,…
Directional Over Current Relays
1. When fault current can flow in both the directions through the relay,…
Impedance Relay
The torque equation T, for such a relay the current actuates the…
Electromagnetic Relay
Electromagnetic relays are those relays which are operated by electromagnetic action. Modern…
Zones and types of Protection system
Zones of Protection system · An electric power system is divided into several…
NATURE &EFFECT OF TRANSFRMER FAULTS
A faults on transformer winding is controlled in magnitude by a) Source &…
TRANSFORMER PROTECTION
• The power transformer is one of the most important links in a…


