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
16
Q
59
A
Over voltage Relay
17
Q
62
A
Time- Delay Stopping or Opening Relay (Another Timer)
18
Q
63
A
Pressure Switch
19
Q
67
A
AC Directional Over Current Relay
20
Q
69
A
Permissive Control Device
21
Q
74
A
Alarm Relay
22
Q
79
A
AC-Reclosing Relay
23
Q
81
A
Frequency Relay
24
Q
83
A
Automatic Selective Control or Transfer Relay
25
85
Pilot Communications, Carrier or Pilot Wire Relay
26
86
Lockout Relay
27
87
Differential Protective Relay
28
94
Tripping or Trip-Free Relay
