DEVICE #'S Flashcards
3
CHECKING OR INTERLOCKING RELAY
13
SYNCHRONOUS SPEED DEVICE
14
UNDER-SPEED DEVICE
20
ELECTRICALLY OPERATED VALVE
21
DISTANCE RELAY
26
APPARATUS THERMAL DEVICE
27
UNDER VOLTAGE RELAY
33
POSITION SWITCH
38
BEARING PROTECTIVE RELAY
40
FIELD RELAY
41
FIELD CIRCUIT BREAKER
43
MANUAL TRANSFER \ SELECTOR DEVICE
46
REVERSE PHASE/PHASE BALANCE CURRENT RELAY
48
INCOMPLETE SEQUENCE
49
MACHINE/TRANSFORMER THERMAL RELAY
50
INSTANTANEOUS OVERCURRENT
51
AC TIME DELAY OVERCURRENT
51V
AC TIME DELAY OVERCURRENT WITH A VOLTAGE RESTRAINT
52
AC CIRCUIT BREAKER
55
POWER FACTOR RELAY
56
FIELD APPLICATION RELAY
59
OVER VOLTAGE RELAY
62
TIME DELAY STOPPING OR OPENING RELAY
63
PRESSURE SWITCH
64
GROUND PROTECTIVE RELAY
70
RHEOSTAT
71
LEVEL SWITCH
72
DC CIRCUIT BREAKER
80
FLOW SWITCH
81
FREQUENCY RELAY
86
LOCK OUT RELAY
87
DIFFERENTIAL PROTECTIVE RELAY
89
LINE SWITCH
90
REGULATING DEVICE
94
TRIP FREE RELAY
LIST 5 DEVICES THAT OPERATE RELAYS?
CT’S,PT’S,RTD’S,PRESSURE AND FLOAT SWITCHES.
PROS AND CONS OF ELECTRICAL/MECHANICAL RELAYS
PROS-RELIABLE AND NOT TO SENSITIVE
CONS-ONLY GOOD FOR 1 DEVICE AND OBSOLETE
PROS AND CONS FOR SEL’S
PROS-SPEED AND MANY DEVICES
CONS-SPEED AND EXPENSIVE
WHAT 2 DEVICES OPERATE ELECTROMAGNET RELAYS?
CT’S AND PT’S
ON AN OPEN ENERGIZED CIRCUIT WHAT SHOULDN’T YOU DO?
A CONTINUITY TEST.
WHAT IS DWR’S PROTECTIVE RELAYING MAINTENANCE MANAGEMENT POLICY?
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