Relay Device Numbers Flashcards
1
Q
1
A
Master Element
2
Q
2
A
Time Delay Starting or Closing Relay ( Just a Timer )
3
Q
4
A
Master Contactor
4
Q
8
A
Control Power Disconnecting Device
5
Q
21
A
Distance Relay
6
Q
23
A
Temperature Control Device
7
Q
25
A
Synchronizing or Synchronism-Check Device
8
Q
26
A
Apparatus Thermal Device
9
Q
27
A
Under voltage Relay
10
Q
30
A
Annunciator Relay
11
Q
32
A
Directional Power Relay
12
Q
43
A
Manual Transfer or Selector Switch
13
Q
50
A
Instantaneous Overcurrent
14
Q
51
A
AC Inverse Time Overcurrent Relay
15
Q
52
A
AC Circuit Breaker
