GE SecoGear Application Manual

Also see for SecoGear: Installation, operation and maintenance manual User manual

Contents

DET-882 SecoGear Medium-voltage Switchgear Application and Technical GuideSystem and Equipment Protection©2017 General Electric All Rights Reserved 35Device Function27s DC undervoltage relay28 Flame detector29 Isolating contactor or switch30 Annunciator relay31 Separate excitation32 Directional power relay or reverse power relay33 Position switch34 Master sequence device35 Brush-operating or slip-ring short-circuitingdevice36 Polarity or polarizing voltage devices37 Undercurrent or underpower relay38 Bearing protective device39 Mechanical condition monitor40 Field (over-/underexcitation) relay41 Field circuit breaker42 Running circuit breaker43 Manual transfer or selector device44 Unit sequence starting relay45 DC overvoltage relay46 Reverse-phase or phase-balance current relay47 Phase-sequence or phase-balance voltagerelay48 Incomplete sequence relay49 Machine or transformer, thermal relay-OLR50 Instantaneous overcurrent relay50G Instantaneous earth over current relay(neutral CT method)50N Instantaneous earth over current relay(residual method)50BF Breaker failure51 AC inverse time overcurrent relay51LR AC invers time overcurrent (locked rotor)protection Relay51G AC inverse time earth overcurrent relay(neutral CT method)51N AC inverse time earth overcurrent relay(residual method)52 AC circuit breaker52a AC circuit breaker position (contact open whenbreaker open)52b AC circuit breaker position (contact closedwhen breaker open)53 Exciter or DC generator relay54 Turning gear engaging device55 Power FACTOR RELAY56 Field application relay57 Short-circuiting or grounding device58 Rectification failure relay59 Overvoltage relay60 Voltage or current balance relay61 Density switch or sensor62 Time-delay stopping or opening relayDevice Function63 Pressure switch64 Ground detector relay64REF Restricted earth fault differential64R Rotor earth fault64S Stator earth fault65 Governor66 Notching or jogging device67 AC directional overcurrent relay67N Directional earth fault relay68 Blocking relay69 Permissive control device70 Rheostat71 Liquid level switch72 DC circuit breaker73 Load-resistor contactor74 Alarm relay75 Position changing mechanism76 DC overcurrent relay77 Telemetering device78 Phase-angle measuring relay or “out-of-step”relay79 AC reclosing relay (auto-reclosing)80 Flow switch81 Frequency relay82 DC reclosing relay83 Automatic selective control or transfer relay84 Operating mechanism85 Communications, carrier or pilot-wire relay86 Lockout relay/master trip87 Differential protective relay88 Auxiliary motor or motor generator89 Line switch90 Regulating device91 Voltage directional relay92 Voltage and power directional relay93 Field changing contactor94 Tripping or trip-free relay( trip circuitsupervision relay)95 For specific applications where other numbersare not suitable96 Bus bar trip lockout relay97 For specific applications where other numbersare not suitable98 For specific applications where other numbersare not suitable99 For specific applications where other numbersare not suitable150 Earth fault indicatorAFD Arc flash detectorCLK Clock or timing sourceDDR Dynamic disturbance recorderDFR Digital fault recorderDME Disturbance monitor equipment