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ANSI Device Numbers > General Overview > Flashcards

General Overview Flashcards

1
Q

1

A

Master element

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2
Q

2

A

Time-delay starting or closing relay

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3
Q

3

A

Checking or interlocking relay, complete sequence

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4
Q

4

A

Master protective

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5
Q

5

A

Stopping device, emergency stop switch

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6
Q

6

A

Starting circuit breaker

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7
Q

7

A

Rate of change relay

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8
Q

8

A

Control power disconnecting device

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9
Q

9

A

Reversing device

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10
Q

10

A

Unit sequence switch

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11
Q

11

A

Multifunction device

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12
Q

12

A

Overspeed Device

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13
Q

13

A

Synchronous-speed device

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14
Q

14

A

Underspeed device

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15
Q

15

A

Speed or frequency matching device

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16
Q

16

A

Data communication device

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17
Q

17

A

Shunting or discharge switch

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18
Q

18

A

Accelerating or decelerating device

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19
Q

19

A

Starting to running transition contactor

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20
Q

20

A

Electrically operated valve (solenoid valve)

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21
Q

21

A

Distance relay

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22
Q

22

A

Equalizer circuit breaker

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23
Q

23

A

Temperature control device, heater

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24
Q

24

A

Volts per hertz relay

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25
Q

25

A

Synchronizing or synchronism-check device

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26
Q

26

A

Apparatus thermal device, temperature switch

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27
Q

27

A

Undervoltage relay

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28
Q

28

A

Flame detector

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29
Q

29

A

Isolating contactor

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30
Q

30

A

Annunciator relay

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31
Q

31

A

Separate excitation device

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32
Q

32

A

Directional power relay

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33
Q

33

A

Position switch

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34
Q

34

A

Master sequence device

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35
Q

35

A

Brush-operating or slip-ring short circuiting device

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36
Q

36

A

Polarity or polarizing voltage device

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37
Q

37

A

Undercurrent or underpower relay

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38
Q

38

A

Bearing protective device / bearing RTD

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39
Q

39

A

Mechanical condition monitor (vibration)

40
Q

40

A

Field relay / loss of excitation

41
Q

41

A

Field circuit breaker

42
Q

42

A

Running circuit breaker

43
Q

43

A

Manual transfer or selector device

44
Q

44

A

Unit sequence or starter relay

45
Q

45

A

Fire detector

46
Q

46

A

Reverse-phase or phase balance current relay or stator current unbalance

47
Q

47

A

Phase-sequence or phase balance voltage relay

48
Q

48

A

Incomplete sequence relay / blocked rotor

49
Q

49

A

Machine or transformer thermal relay / thermal overload

50
Q

50

A

Instantaneous overcurrent relay

51
Q

51

A

AC time overcurrent relay

52
Q

52

A

AC circuit breaker

53
Q

53

A

Exciter or Dc generator relay

54
Q

54

A

Turning gear engaging device

55
Q

55

A

Power factor relay

56
Q

56

A

Field application relay

57
Q

57

A

Short-circuiting or grounding device

58
Q

58

A

Rectification failure relay

59
Q

59

A

Overvoltage relay

60
Q

60

A

Voltage or current balance relay

61
Q

61

A

Density switch or sensor

62
Q

62

A

Time-delay stopping or opening relay

63
Q

63

A

Pressure switch detector

64
Q

64

A

Ground protective relay

65
Q

65

A

Govenor

66
Q

66

A

Notching or jogging device / maximum starting rate / starts per hour / time between starts

67
Q

67

A

AC directional overcurrent relay

68
Q

68

A

Blocking relay / power swing blocking

69
Q

69

A

Permissive control device

70
Q

70

A

Rheostat

71
Q

71

A

Liquid switch

72
Q

72

A

DC circuit breaker

73
Q

73

A

Load-resistor contactor

74
Q

74

A

Alarm relay

75
Q

75

A

Position changing mechanism

76
Q

76

A

DC overcurrent relay

77
Q

77

A

Telemetering device, speed sensor

78
Q

78

A

Phase angle measuring or out-of-step protective relay

79
Q

79

A

AC reclosing relay / auto reclose

80
Q

80

A

Liquid or gas flow relay

81
Q

81

A

Frequency relay

82
Q

82

A

DC reclosing relay

83
Q

83

A

Automatic selective control or transfer relay

84
Q

84

A

Operative mechanism

85
Q

85

A

Pilot communications, carrier or pilot-wire relay

86
Q

86

A

Lock-out relay, master trip relay

87
Q

87

A

Differential protective relay

88
Q

88

A

Auxiliary motor or motor generator

89
Q

89

A

Line switch

90
Q

90

A

Regulating device

91
Q

91

A

Voltage directional relay

92
Q

92

A

Voltage and power directional relay

93
Q

93

A

Field-changing contactor

94
Q

94

A

Tripping or trip-free relay

95
Q

96

A

Transmitter

96
Q

95, 97-99

A

For specific applications where other numbers are not suitable

ANSI Device Numbers (2 decks)

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