GE Kelman DGA900 Operator's Manual page 6

Transformer oil dissolved gas and moisture monitor
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Figure B-9: PGA lock – pin to enclosure hole .................................................................................................................. 78
Figure B-10: PGA lock – pins and locking bracket secured with cable ties ..................................................... 78
Figure C-1: Controller PCB coin cell battery .................................................................................................................... 79
Figure C-2: Marshalling PCB coin cell battery ................................................................................................................ 79
Figure C-3: Hub fan air inlet .................................................................................................................................................... 80
Figure C-4: Detached inlet cover with filter – facedown .......................................................................................... 80
Figure C-5: Detached inlet cover with filter removed ................................................................................................ 80
Figure C-6: Filter mesh cartridge – face up ..................................................................................................................... 80
Figure C-7: Louvre catchment tray – attached ............................................................................................................. 81
Figure C-8: Louvre gasket – tray removed ...................................................................................................................... 81
Figure C-9: Louvre catchment tray – detached & filter removed ........................................................................ 81
Figure C-10: Louvre air filter ................................................................................................................................................... 81
Figure C-11: Oil connections .................................................................................................................................................. 82
Figure C-12: Oil filter ................................................................................................................................................................... 82
Figure C-13: Internal push-fit cover removal ................................................................................................................. 82
Figure C-14: Peltier cooler ....................................................................................................................................................... 84
Figure C-15: Fan group electrical connection ............................................................................................................... 84
Figure C-16: Peltier cooling fins ............................................................................................................................................ 84
Figure C-17: Fan group detached from cooler .............................................................................................................. 84
Table D-1: Timing ......................................................................................................................................................................... 85
Table D-2: UNIX time registers .............................................................................................................................................. 85
Table D-3: Access flags ............................................................................................................................................................. 86
Table D-4: Modifier flags .......................................................................................................................................................... 86
Table E-1: Main Tank: Gas Level Alarms ........................................................................................................................... 88
Table E-2: ROC alarms (key gas values) ............................................................................................................................ 88
Table E-3: ROC alarms (for ROC in ml/day) ...................................................................................................................... 90
Table E-4: Measurement intervals ....................................................................................................................................... 90
Related Documents
Ref#
Title
MA-024
DGA 900 Installation Manual
Abbreviations & Definitions
Abbreviation
Meaning
HMI
Human Machine Interface
Controller PCB
Controller Printed Circuit Board
I/O PCB
Input / Output Printed Circuit Board
Marshalling PCB
Marshalling Printed Circuit Board
PPE
Personal Protective Equipment
PCC
Power, Communications and Control (cable)
RoC
Rate of Change
MA-025 – DGA 900 Operator Guide – Rev 2.0
12-Apr-19
Page 6 of 92

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