ANSI Device Numbers Flashcards
1
Q
21
A
Distance Relay
2
Q
27
A
Undervoltage Relay
3
Q
32
A
Directional Relay
4
Q
50
A
Instantaneous Overcurrent
5
Q
51
A
AC Inverse Time Overcurrent Relay
6
Q
52
A
AC Circuit Breaker
7
Q
59
A
Overvoltage Relay
8
Q
87
A
Differential Protective Relay
9
Q
47
A
Phase sequence
10
Q
86
A
Lockout Relay
11
Q
37
A
Undercurrent
