IEEE Relaying Numbering Flashcards
1
Q
A
2
Q
1
A
Master Element
3
Q
2
A
Time Delay Starting or Closing Relay
4
Q
3
A
Checking or Interlocking Relay
5
Q
4
A
Master Contactor
6
Q
5
A
Stopping Device
7
Q
6
A
Starting Circuit Breaker
8
Q
7
A
Rate of Change Relay
9
Q
8
A
Control Power Disconnecting Device
10
Q
9
A
Reversing Device
11
Q
10
A
Unit Sequence Switch
12
Q
11
A
Multifunction Device
13
Q
12
A
Overspeed Device
14
Q
13
A
Synchronous speed Device
15
Q
14
A
Underspeed Device
16
Q
15
A
Speed or Frequency Matching Device
17
Q
16
A
Data Communications Device
18
Q
20
A
Elect. operated valve (solenoid valve)
19
Q
21
A
Distance Relay
20
Q
23
A
Temperature Control Device
21
Q
24
A
Volts per Hertz Relay
22
Q
25
A
Synchronizing or Synchronism Check
23
Q
26
A
Apparatus Thermal Device
24
Q
27
A
Undervoltage Relay
25
30
Annunciator Relay
26
32
Directional Power Relay
27
36
Polarity or Polarizing Voltage Devices
28
37
Undercurrent or Underpower Relay
29
38
Bearing Protective Device
30
39
Mechanical Conduction Monitor
31
40
Field (over/under excitation) Relay
32
41
Field Circuit Breaker
33
42
Running Circuit Breaker
34
43
Manual Transfer or Selector Device
35
46
Rev. phase or Phase Bal. Current Relay
36
47
Phase Seq. or Phase Bal. Voltage Relay
37
48
Incomplete Sequence Relay
38
49
Machine or Transformer Thermal Relay
39
50
Instantaneous Overcurrent
40
51
AC Time Overcurrent Relay
41
52
AC Circuit Breaker
42
53
Field Excitation Relay
43
55
Power Factor Relay
44
56
Field Application Relay
45
59
Overvoltage Relay
46
60
Voltage or Current Balance Relay
47
62
Time Delay Stopping or Opening Relay
48
63
Pressure Switch
49
64
Ground Detector Relay
50
65
Governor
51
66
Notching or jogging device
52
67
AC Directional Overcurrent Relay
53
68
Blocking or ?out of step? Relay
54
69
Permissive Control Device
55
74
Alarm Relay
56
75
Position Changing Mechanism
57
76
DC Overcurrent Relay
58
78
Phase Angle Measuring Relay
59
79
AC Reclosing Relay
60
81
Frequency Relay
61
83
Automatic Selective Control or Transfer
62
84
Operating Mechanism
63
85
Pliot Communications, Carrier or Pilot
64
86
Lockout Relay
65
87
Differential Protective Relay
66
89
Line Switch
67
90
Regulating Device
68
91
Voltage Directional Relay
69
92
Voltage and Power Directional Relay
70
94
Tripping or Trip Free Relay
71
B
Bus
72
F
Field
73
G
Ground or generator
74
N
Neutral
75
T
Transformer
