IEEE Std Device Numbers Flashcards
1
Q
21
A
distance relay
2
Q
25
A
synchronizing relay
3
Q
27
A
undervoltage relay
4
Q
32
A
directional power relay
5
Q
30
A
field relay
6
Q
50
A
instantaneous overcurrent relay
7
Q
51
A
AC time overcurrent relay
8
Q
59
A
overvoltage relay
9
Q
67
A
AC directional overcurrent relay
10
Q
74
A
alarm relay
11
Q
81
A
frequency relay
12
Q
83
A
transfer relay
13
Q
86
A
lockout relay
14
Q
87
A
differential protective relay
15
Q
distance relay
A
21
16
Q
synchronizing
A
25
17
Q
undervoltage relay
A
27
18
Q
field relay
A
30
19
Q
directional power relay
A
32
20
Q
instantaneous overcurrent relay
A
50
21
Q
AC time overcurrent relay
A
51
22
Q
overvoltage relay
A
59
23
Q
AC directional overcurrent relay
A
67
24
Q
alarm relay
A
74
25
frequency relay
81
26
transfer relay
83
27
lockout relay
86
28
differential protective relay
87
