Protective Relaying Flashcards
1
Master element
2
Time delay starting or closing
3
Checking or interlocking relay
4
Master contactor
5
Stopping device
6
Starting circuit breaker
7
Anode circuit breaker
8
Control power disconnect device
9
Reversing device
10
Unit sequence switch
11
Not used
12
Overspeed device
13
Synchronous speed device
14
Under speed device
15
Speed or frequency matching device
16
Not used
17
Shunting or discharge switch
18
Accelerating or decelerating device
19
Starting to running transition contactor
20
Electrically operated valve
21
Distance relay
22
Equalizer circuit breaker
23
Temperature control device
24
Not used
25
Synchronizing check device
26
Amortessure thermal device
27
Under voltage relay
28
Flame detector
29
Isolating contactor
31
Separate excitation device
30
Annunciator relay
32
Directional power relay
33
Position switch
34
Master sequence device
35
Brush operating device
36
Polarity voltage device
37
Undercurrent relay
38
Bearing protective device
39
Mechanical condition monitor
40
Field relay
41
Field circuit breaker
42
Running circuit breaker
43
Manuel transfer device
44
Unit sequence starting relay
45
Atmospheric condition monitor
46
Reverse phase or negative phase
47
Phase sequence voltage relay
48
Incomplete sequence relay
49
Machine or transformer thermal relay
50
Instantaneous over current
51
Ac time over current relay
52
Ac circuit breaker
53
Exciter or D.C. Generator relay
54
Not used
55
Power factor relay
56
Field application relay
59
Over voltage relay
70
Rheostat device
71
Level switch
72
D.C. Circuit breaker
86
Lock out relay
87
Differential protective relay
