Device numbers Flashcards
1
Q
3
A
Checking or interlocking relay
2
Q
4
A
Master contactor
3
Q
12
A
Overspeed device
4
Q
13
A
Synchronous-speed device
5
Q
14
A
Under-speed device
6
Q
20
A
Electrically operated valve
7
Q
21
A
Distance relay
8
Q
26
A
Apparatus thermal device
9
Q
27
A
Undervoltage relay
10
Q
33
A
Position switch
11
Q
38
A
Bearing protective device
12
Q
40
A
Field relay
13
Q
41
A
Field circuit breaker
14
Q
43
A
Manual transfer/selector switch
15
Q
46
A
Reverse phase or phase balance current relay
