IEEE Relaying Numbering Flashcards by Jeff Gilpin

Q

A

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Q

1

A

Master Element

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Q

2

A

Time Delay Starting or Closing Relay

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Q

3

A

Checking or Interlocking Relay

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Q

4

A

Master Contactor

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Q

5

A

Stopping Device

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Q

6

A

Starting Circuit Breaker

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Q

7

A

Rate of Change Relay

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Q

8

A

Control Power Disconnecting Device

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Q

9

A

Reversing Device

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Q

10

A

Unit Sequence Switch

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Q

11

A

Multifunction Device

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Q

12

A

Overspeed Device

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Q

13

A

Synchronous speed Device

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Q

14

A

Underspeed Device

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Q

15

A

Speed or Frequency Matching Device

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Q

16

A

Data Communications Device

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Q

20

A

Elect. operated valve (solenoid valve)

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Q

21

A

Distance Relay

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Q

23

A

Temperature Control Device

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Q

24

A

Volts per Hertz Relay

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Q

25

A

Synchronizing or Synchronism Check

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Q

26

A

Apparatus Thermal Device

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Q

27

A

Undervoltage Relay

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Q

30

A

Annunciator Relay

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Q

32

A

Directional Power Relay

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Q

36

A

Polarity or Polarizing Voltage Devices

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Q

37

A

Undercurrent or Underpower Relay

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Q

38

A

Bearing Protective Device

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Q

39

A

Mechanical Conduction Monitor

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Q

40

A

Field (over/under excitation) Relay

Q

41

A

Field Circuit Breaker

Q

42

A

Running Circuit Breaker

Q

43

A

Manual Transfer or Selector Device

Q

46

A

Rev. phase or Phase Bal. Current Relay

Q

47

A

Phase Seq. or Phase Bal. Voltage Relay

Q

48

A

Incomplete Sequence Relay

Q

49

A

Machine or Transformer Thermal Relay

Q

50

A

Instantaneous Overcurrent

Q

51

A

AC Time Overcurrent Relay

Q

52

A

AC Circuit Breaker

Q

53

A

Field Excitation Relay

Q

55

A

Power Factor Relay

Q

56

A

Field Application Relay

Q

59

A

Overvoltage Relay

Q

60

A

Voltage or Current Balance Relay

Q

62

A

Time Delay Stopping or Opening Relay

Q

63

A

Pressure Switch

Q

64

A

Ground Detector Relay

Q

65

A

Governor

Q

66

A

Notching or jogging device

Q

67

A

AC Directional Overcurrent Relay

Q

68

A

Blocking or ?out of step? Relay

Q

69

A

Permissive Control Device

Q

74

A

Alarm Relay

Q

75

A

Position Changing Mechanism

Q

76

A

DC Overcurrent Relay

Q

78

A

Phase Angle Measuring Relay

Q

79

A

AC Reclosing Relay

Q

81

A

Frequency Relay

Q

83

A

Automatic Selective Control or Transfer

Q

84

A

Operating Mechanism

Q

85

A

Pliot Communications, Carrier or Pilot

Q

86

A

Lockout Relay

Q

87

A

Differential Protective Relay

Q

89

A

Line Switch

Q

90

A

Regulating Device

Q

91

A

Voltage Directional Relay

Q

92

A

Voltage and Power Directional Relay

Q

94

A

Tripping or Trip Free Relay

Q

B

A

Bus

Q

F

A

Field

Q

G

A

Ground or generator

Q

N

A

Neutral

Q

T

A

Transformer