What Are the Main Types of Protection Relays?
by Starlight Generator dieselgeneratortechThe relays are used to
protect the electrical equipment from damage in case of the fault. The
protection relays are used to protect electrical equipment. The following types
of relays are used for electrical equipment.
Feeder protection
Relays:
Overcurrent(IDMT,
definite and Instantaneous current/time characteristics)
Earth Fault Relay
Under voltage relay
Fuse Failure Relay
Transformer Protection
Relays:
Gas operated Relay for
main tank and tap changer
Overcurrent(O/C) Relay
Earth Fault Relay
Restricted Earth fault
(REF) Relay
Oil temperature/winding
temperature relay
Pressure operated relay
Over fluxing Relay
Differential Relay
Motor Protection Relays:
Motor Protection Relay:
The relay has the Overload, negative(I2) phase seq., Earth fault, unbalance and
undervoltage protections.
Differential relay for a
large rating motors
Generator Protection
Relays:
Overvoltage
Short circuit
Thermal overload
Negative phase
sequence(NPS)relay
Differential protection
Under/Over frequency
detection relay
Earth Fault Relay
Under voltage
Rotor earth fault relay
Under excitation relay
Synchronization system
Relay:
Under/Over Voltage
Reverse power relay
Low Forward power Relay
Check Syncronizing Relay
Directional Overcurrent
relay
df/dt Relay
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Created on Sep 4th 2019 02:24. Viewed 282 times.