Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Phase 1B > Device Numbers > Flashcards

Device Numbers Flashcards

0
Q

2

A

TIME-DELAY STARTING OR CLOSING RELAY - one which gives a desired amount of time delay between operations in an automatic sequence

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
1
Q

1

A

MASTER ELEMENT - initiating device to place an equipment in or out of operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

3

A

Reserved for future applications

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

4

A

MASTER CONTACTOR OR RELAY - device, generally controlled by device no. 1 to place an equipment into operation under the desired conditions and to take it out of operation under other or abnormal conditions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

5

A

STOPPING DEVICE - one whose primary function is to place and hold an equipment out of operation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

6

A

STARTING CIRCUIT BREAKER, CONTACTOR OR SWITCH - device whose principle function is to connect a machine to its source of starting voltage

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

7

A

ANODE CIRCUIT BREAKER - used in the anode circuits of a power rectifier, primarily to interrupt the rectifier circuits on arc back

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

8

A

CONTROL POWER SWITCH - manually operated switch or circuit breaker used for the express purpose of connecting and disconnecting the source of control power to and from the control bus or equipment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

9

A

REVERSING DEVICE - used to reverse the shunt-field connections of a synchronous converter during the starting sequence or for other special reversing functions

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

10

A

UNIT SEQUENCE SWITCH - used to change the sequence of placing units in and out of service in multiple-unit equipments

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

11

A

CONTROL POWER TRANSFORMER - serves as the source of a-c control power for operating a-c devices

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

12

A

OVERSPEED DEVICE - is a direct connected speed switch which functions on machine overspeed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

13

A

SYNCHRONOUS-SPEED DEVICE - is one which operates at approximately normal synchronous speed of a machine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

14

A

UNDERSPEED DEVICE - functions on machine speed below a desired value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

15

A

SPEED REGULATING DEVICE - functions to hold the speed or frequency of a machine or system at a certain value or between certain limits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

16

A

BATTERY-CHARGING CONTROL DEVICE - is the battery charger

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

17

A

SERIES FIELD SHUNTING CIRCUIT BREAKER OR CONTACTOR - serves to open and close a shunt circuit around a machine series field

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

18

A

ACCELERATING OR DECELERATING CIRCUIT BREAKER, CONTACTOR, OR RELAY - one which is used to close or cause the closing of circuits for bringing a machine up to speed or shutting it down

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

19

A

STARTING TO RUNNING TRANSITION CONTRACTOR OR RELAY - operates to cause the transfer of a machine from the starting to the running power connections

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

20

A

ELECTRICALLY OPERATED VALVE - solenoid or motor operated valve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

21

A

IMPEDANCE RELAY - functions when the circuit impedance increases or decreases to a predetermined value

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

22

A

EQUALIZER CIRCUIT BREAKER OR CONTACTOR - serves to make and break the equalizer or current-balancing connections for machine field, or voltage regulators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

23

A

TEMPERATURE REGULATING DEVICE - functions to hold the temperature of a machine or other apparatus between certain limits

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

24

A

BUS TIE CIRCUIT BREAKER, CONTACTOR, OR SWITCH - serves to connect buses or bus sections together

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
25
SYNCHRONIZING OR PARALLEL DEVICE - operates when two a-c circuits are within the desire limits of voltage, frequency, and/or phase angle, to permit the paralleling of these two circuits
25
26
APPARATUS THERMAL DEVICE - one which functions at desired operating-temperature values or limits
26
27
A-C UNDERVOLTAGE RELAY - functions on a given value of single-phase a-c under-voltage
27
28
RESISTOR THERMAL DEVICE - functions upon excessive load indicating, limiting, or shifting resistor temperature
28
29
ISOLATING CIRCUIT BREAKER, CONTACTOR, OR SWTICH - is used for the purpose of disconnecting one circuit from another
29
30
ANNUNCIATOR RELAY - is a nonautomatic reset device with visual indications upon the functioning of protective devices
30
31
SEPARATE EXCITATION DEVICE - connects a circuit such as a synchronous converter shunt field to a source of separate excitation during the starting sequence, or for energizing the excitation and ignition circuits of a power rectifier
31
32
D-C REVERSE POWER RELAY OR DEVICE - one which functions on a given value of d-c reverse power
32
33
POSITION SWITCH - one which makes or breaks contact when the main device or piece of apparatus, which has no device-function number, reaches a given position
33
34
MOTOR-OPERATED SEQUENCE SWITCH - one which fixes the operating sequence of the major devices during starting and stopping, or during other sequential-switching operations
34
35
BRUSH-OPERATING OR SLIP-RING SHORT-CIRCUITING DEVICE - one for raising, lowering, or shifting the brushes of a machine, or for short-circuiting the slip rings.
35
36
POLARITY DEVICE - one which operates or permits the operation of another device on a given polarity only
36
37
UNDERCURRENT OR UNDERPOWER RELAY - one which functions on a given minimum of current or power flow
37
38
BEARING THERMAL DEVICE - one which functions on excessive bearing temperatures
38
39
FIELD REDUCING CONTACTOR - one which inserts resistance in the field circuit of a machine or otherwise reduces its field excitation
39
40
FIELD RELAY - one which functions on a given value of machine field current
40
41
FIELD CIRCUIT BREAKER, CONTACTOR, OR SWITCH - is a device which functions to apply, and/or remove, the machine field excitation
41
42
RUNNING CIRCUIT BREAKER, CONTACTOR, OR SWITCH - is a device whose principal function is to connect a machine to its source of running voltage
42
43
TRANSFER DEVICE - manually operated device which transfers the control circuits to modify the plan of operation of the switching equipment
43
44
UNIT SEQUENCE STARTING CONTACTOR OR RELAY - functions to start the next available unit in a multiple-unit equipment on failure or nonavailabilty of normally preceding units
44
45
D-C OVERVOLTAGE RELAY - functions on a given value of d-c circuit over-voltage
45
46
REVERSE-PHASE, PHASE-BALANCE CURRENT, OR POWER RECTIFIER MISFIRE RELAY - functions on polyphase current of reverse-phase sequence, or on polyphase current unbalance, or on failure of one or more of the power rectifier anodes to fire
46
47
SINGLE- OR REVERSE-PHASE VOLTAGE RELAY - functions upon a given value of polyphase voltage of the desired phase sequence
47
48
INCOMPLETE SEQUENCE RELAY - returns the equipment to the normal, or off, position and locks it out if the normal starting, or operating, or stopping sequence is not properly completed within a predetermined time
48
49
A-C THERMAL RELAY OR DEVICE - functions when the temperature of the a-c machine or apparatus exceeds a given value
49
50
SHORT-CIRCUIT SELECTIVE RELAY OR DEVICE - functions instantaneously on an excessive value of current, or on an excessive rate of current rise, indicating a fault in the circuit being protected
50
51
AC OVERCURRENT RELAY - functions when the current in an ac circuit exceeds a given value
51
52
AC CIRCUIT BREAKER OR CONTACTOR - principle function is usually to interrupt short-circuit or fault currents.
52
53
EXCITER OR GENERATOR RELAY - forces the building up of the dc machine field during starting and/or functions when the machine voltage has built up to a given value
53
54
HIGH-SPEED CIRCUIT BREAKER - circuit breaker which starts to reduce the current in the main circuit in 0.01 second or less, after the occurrence of the dc overcurrent or the excessive rate of current rise
54
55
POWER-FACTOR RELAY - operates on a given power factor in an ac circuit
55
56
FIELD APPLICATION RELAY OR DEVICE - used to control automatically the application of ac motor field excitation at some predetermined point in the slip cycle
56
57
Reserved for future application
57
58
Reserved for future application
58
59
AC OVERVOLTAGE RELAY - functions on a given value of ac overvoltage
59
60
VOLTAGE BALANCE RELAY - operates on a difference in voltage between two circuits
60
61
CURRENT BALANCE RELAY - Operates on difference in current input or output of two circuits
61
62
TIME DELAY STOPPING OR OPENING RELAY - serves in conjunction with the device which initiates the shutdown, or stopping, or opening in an automatic sequence
62
63
FLUID PRESSURE, LEVEL, OR FLOW RELAY - operates on a given value of fluid or gas pressure, or flow, or fluid level
63
64
GROUND PROTECTIVE RELAY - functions on failure of the insulation of a machine, transformer, or other apparatus to ground, or on flashover of a dc machines to ground. This function is however, not applied for the residual or secondary neutral circuit of current transformers
64
65
GOVERNOR - is the equipment which controls the gate or valve opening of a prime mover
65
66
NOTCHING RELAY - Functions to allow only a specified number of operations of a given device or equipment, or a specified number of successive operations within a given time of each other
66
67
AC POWER DIRECTIONAL OR AC POWER DIRECTIONAL OVERCURRENT RELAY - Functions on a desired value of power flow or on a desired value of overcurrent with ac power flow, in a given direction
67
68
DC THERMAL RELAY OR DEVICE - functions when the temperature of the dc machine exceeds a given value
68
69
PERMISSIVE CONTROL DEVICE - is generally a two position, manually operated switch which permits the closing of a circuit breaker, or the placing of an equipment into operation in one position and in the other position prevents operating the circuit breaker or the equipment
69
70
ELECTRICALLY OPERATED RHEOSTAT - used to vary the resistance of a circuit in response to some means of electrical control
70
71
D-C LINE EMERGENCY CIRCUIT BREAKER OR CONTACTOR - used to interrupt a d-c power circuit under emergency conditions, such as overspeed
71
72
D-C LINE CIRCUIT BREAKER OR CONTACTOR - used to close and interrupt a d-c power circuit under normal conditions and/or to interrupt this circuit under emergency conditions
72
73
LOAD RESISTOR CIRCUIT BREAKER OR CONTACTOR - used to shunt or insert a step of load limiting, shifting, or indicating resistance in a power circuit, or to switch a space heater in circuit
73
74
ALARM RELAY - is one other than an annunciator which is used to operate, or to operate in connection with, a visual or audible alarm
74
75
POSITION CHANGING MECHANISM - used for moving a removable circuit breaker unit to and from the connected, disconnected, and test positions
75
76
D-C OVERCURRENT RELAY - functions when the current in a d-c circuit exceeds a given value
76
77
IMPULSE TRANSMITTER - generates and transmits impulses over a telemetering or pilot-wire circuit to the remote indicating or receiving device
77
78
PHASE-ANGLE MEASURING RELAY - functions at a predetermined phase angle between voltages or currents
78
79
A-C RECLOSING RELAY - controls the reclosing and locking out of a a-c circuit interrupter
79
80
D-C UNDERVOLTAGE RELAY OR DEVICE - functions on a given value of d-c undervoltage
80
81
FREQUENCY DEVICE - functions on a given value of frequency either under, over, or normal
81
82
DC RECLOSING RELAY - controls the closing and reclosing of a dc circuit interrupter, generally in response to load circuit conditions
82
83
SELECTIVE CONTROL, OR TRANSFER, CONTACTOR OR RELAY - operates to select automatically between sources or conditions in an equipment, or performs automatically a transfer operation
83
84
OPERATING MECHANISM - the complete electrical mechanism, including the operating motor, position switches, etc, for a tap changer, induction regulator or similar apparatus
84
85
CARRIER or PILOT-WIRE RECEIVER RELAY - operated or restrained by a blocking signal used in connection with carrier current or d-c pilot-wire fault directional relaying
85
86
LOCKING-OUT RELAY OR DEVICE - an electrically operated hand or electrically reset relay or device which functions to shut down and hold an equipment out of service on the occurrence of abnormal conditions
86
87
DIFFERENTIAL CURRENT RELAY - a fault-detecting relay which functions on a differential current of a given percentage or amount
87
88
AUXILIARY MOTOR OR MOTOR GENERATOR - used for operating auxiliary equipment such as pumps, blowers, exciters, etc.
88
89
LINE SWITCH - used as a disconnecting or isolating switch in an ac or dc power circuit
89
90
REGULATING DEVICE - functions to regulate a quantity such as voltage, current, power, etc, at a certain value or between certain limits
90
91
DC VOLTAGE DIRECTIONAL RELAY - operates when the dc voltage across an open circuit breaker or contactor exceeds a given value in a given direction
91
92
DC VOLTAGE AND CURRENT DIRECTIONAL RELAY - operates in one manner when the dc voltage across an open circuit breaker or contactor exceeds a given value in a given direction, and operates in the opposite manner when the current in the circuit, after the circuit breaker or contactor is closed, exceeds a given value in the opposite direction
92
93
FIELD CHANGING CONTACTOR OR RELAY - functions to change the value of excitation on a machine
93
94
TRIPPING OR TRIP-FREE RELAY OR CONTACTOR - functions to trip a circuit breaker, contractor, or equipment, or to prevent immediate reclosure of a circuit interrupter, in case it opens on overload, even though the original closing circuit is maintained
94
95
RESERVED FOR SPECIAL APPLICATION
95
96
RESERVED FOR SPECIAL APPLICATION
96
97
RESERVED FOR SPECIAL APPLICATION
97
98
RESERVED FOR SPECIAL APPLICATION
98
99
RESERVED FOR SPECIAL APPLICATION

Phase 1B (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions