Ansi Numbers Flashcards
1
Q
51
A
Time over-current relay
2
Q
43
A
selector switch (or local remote switch)
3
Q
2
A
Time delay starting or closing relay
4
Q
12
A
Overspeed device
5
Q
13
A
Synchronous-speed device
6
Q
14
A
Underspeed device
7
Q
21
A
distance relay
8
Q
101
A
breaker control
9
Q
86
A
lockout relay
10
Q
50
A
Instantaneous over-current
11
Q
87
A
differential protective relay
12
Q
74
A
alarm relay
13
Q
59
A
over voltage relay
14
Q
94
A
tripping relay
15
Q
25
A
sync check device
16
Q
62
A
timer
17
Q
79
A
AC re-closing relay
18
Q
63
A
pressure switch
19
Q
81
A
under frequency relay
20
Q
52
A
ac circuit breaker
21
Q
27
A
under voltage relay
