1 Over current Relay
2 Earth Fault Relay
3 Instantaneous Earth Fault Relay
4 Instantaneous Differential
5 Sensitive Earth Fault Relay
6 Neutral displacement Relay
7 Under Voltage Relay
8 Over Voltage Relay
9 Instantaneous Under Voltage Relay
10 Instantaneous Over Voltage Relay
11 Trip Circuit Supervision Relay
12 Tripping Relay
13 Master Tripping Relay
14 High Speed Tripping Relay
15 Auxiliary Relay
16 Fuse Failure Relay
17 DC Failure Relay
18 Check Synchronizing Relay
19 Transformer Differential Relay
20 Buchholz Relay
21 Over Current Relay & Earth Fault Relay
22 Motor Protection
23 Feeder Protection
24 Thermal Over Load Relay
25 Transformer/Line Differential
26 Generator Protection
27 Reverse Reactive Relay
28 Differential/Directional Relay
29 Voltage Protection Relay
30 Distance Protection Relay
31 Maximum Demand Controller Relay
32 Trip Circuit Supervision Relay
33 Definite Time Relay
34 HV No Voltage Relay
35 Vector Surge Relay
36 Protection Fuse Supervision Relay
37 Automatic Voltage Regulating Relay