GE SecoGear Application Guide

DET-882 SecoGear Medium-voltage Switchgear Application and Technical Guide
System and Equipment Protection
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Device
Function
27s
DC undervoltage relay
28
Flame detector
29
Isolating contactor or switch
30
Annunciator relay
31
Separate excitation
32
Directional power relay or reverse power relay
33
Position switch
34
Master sequence device
35 Brush-operating or slip-ring short-circuiting
device
36
Polarity or polarizing voltage devices
37
Undercurrent or underpower relay
38
Bearing protective device
39
Mechanical condition monitor
40
Field (over-/underexcitation) relay
41
Field circuit breaker
42
Running circuit breaker
43
Manual transfer or selector device
44
Unit sequence starting relay
45
DC overvoltage relay
46
Reverse-phase or phase-balance current relay
47 Phase-sequence or phase-balance voltage
relay
48
Incomplete sequence relay
49
Machine or transformer, thermal relay-OLR
50
Instantaneous overcurrent relay
50G
Instantaneous earth over current relay
(neutral CT method)
50N
Instantaneous earth over current relay
(residual method)
50BF
Breaker failure
51
AC inverse time overcurrent relay
51LR
AC invers time overcurrent (locked rotor)
protection Relay
51G
AC inverse time earth overcurrent relay
(neutral CT method)
51N
AC inverse time earth overcurrent relay
(residual method)
52
AC circuit breaker
52a
AC circuit breaker position (contact open when
breaker open)
52b
AC circuit breaker position (contact closed
when breaker open)
53
Exciter or DC generator relay
54
Turning gear engaging device
55
Power FACTOR RELAY
56
Field application relay
57
Short-circuiting or grounding device
58
Rectification failure relay
59
Overvoltage relay
60
Voltage or current balance relay
61
Density switch or sensor
62
Time-delay stopping or opening relay
Device
Function
63
Pressure switch
64
Ground detector relay
64REF
Restricted earth fault differential
64R
Rotor earth fault
64S
Stator earth fault
65
Governor
66
Notching or jogging device
67
AC directional overcurrent relay
67N
Directional earth fault relay
68
Blocking relay
69
Permissive control device
70
Rheostat
71
Liquid level switch
72
DC circuit breaker
73
Load-resistor contactor
74
Alarm relay
75
Position changing mechanism
76
DC overcurrent relay
77
Telemetering device
78 Phase-angle measuring relay or “out-of-step”
relay
79
AC reclosing relay (auto-reclosing)
80
Flow switch
81
Frequency relay
82
DC reclosing relay
83
Automatic selective control or transfer relay
84
Operating mechanism
85
Communications, carrier or pilot-wire relay
86
Lockout relay/master trip
87
Differential protective relay
88
Auxiliary motor or motor generator
89
Line switch
90
Regulating device
91
Voltage directional relay
92
Voltage and power directional relay
93
Field changing contactor
94 Tripping or trip-free relay( trip circuit
supervision relay)
95 For specific applications where other numbers
are not suitable
96
Bus bar trip lockout relay
97 For specific applications where other numbers
are not suitable
98
For specific applications where other numbers
are not suitable
99
For specific applications where other numbers
are not suitable
150
Earth fault indicator
AFD
Arc flash detector
CLK
Clock or timing source
DDR
Dynamic disturbance recorder
DFR
Digital fault recorder
DME
Disturbance monitor equipment

GE SecoGear Specifications

General

Brand	GE
Model	SecoGear
Category	Switch
Language	English