Protective Relaying Flashcards
(62 cards)
1
Q
1
A
Master element
2
Q
2
A
Time delay starting or closing
3
Q
3
A
Checking or interlocking relay
4
Q
4
A
Master contactor
5
Q
5
A
Stopping device
6
Q
6
A
Starting circuit breaker
7
Q
7
A
Anode circuit breaker
8
Q
8
A
Control power disconnect device
9
Q
9
A
Reversing device
10
Q
10
A
Unit sequence switch
11
Q
11
A
Not used
12
Q
12
A
Overspeed device
13
Q
13
A
Synchronous speed device
14
Q
14
A
Under speed device
15
Q
15
A
Speed or frequency matching device
16
Q
16
A
Not used
17
Q
17
A
Shunting or discharge switch
18
Q
18
A
Accelerating or decelerating device
19
Q
19
A
Starting to running transition contactor
20
Q
20
A
Electrically operated valve
21
Q
21
A
Distance relay
22
Q
22
A
Equalizer circuit breaker
23
Q
23
A
Temperature control device
24
Q
24
A
Not used
25
25
Synchronizing check device
26
26
Amortessure thermal device
27
27
Under voltage relay
28
28
Flame detector
29
29
Isolating contactor
30
31
Separate excitation device
31
30
Annunciator relay
32
32
Directional power relay
33
33
Position switch
34
34
Master sequence device
35
35
Brush operating device
36
36
Polarity voltage device
37
37
Undercurrent relay
38
38
Bearing protective device
39
39
Mechanical condition monitor
40
40
Field relay
41
41
Field circuit breaker
42
42
Running circuit breaker
43
43
Manuel transfer device
44
44
Unit sequence starting relay
45
45
Atmospheric condition monitor
46
46
Reverse phase or negative phase
47
47
Phase sequence voltage relay
48
48
Incomplete sequence relay
49
49
Machine or transformer thermal relay
50
50
Instantaneous over current
51
51
Ac time over current relay
52
52
Ac circuit breaker
53
53
Exciter or D.C. Generator relay
54
54
Not used
55
55
Power factor relay
56
56
Field application relay
57
59
Over voltage relay
58
70
Rheostat device
59
71
Level switch
60
72
D.C. Circuit breaker
61
86
Lock out relay
62
87
Differential protective relay
