GE Kelman DGA900 Manual

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 1 of 92
GE
Grid Solutions
Kelman™ DGA 900
Operator Guide
Transformer Oil
Dissolved Gas and Moisture Monitor

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 2 of 92
Contents
Page
1Introduction............................................................................................... 7
1.1 Product Overview ................................................................................................................................7
1.2 Scope ........................................................................................................................................................9
1.3 Front Panel LEDs ..................................................................................................................................9
2Safety........................................................................................................10
2.1 Symbols................................................................................................................................................. 10
2.2 Warnings .............................................................................................................................................. 10
2.3 Hazardous Substances ................................................................................................................... 11
3Technical Specifications .........................................................................12
4Compliance ..............................................................................................14
5Power........................................................................................................15
6HMI............................................................................................................16
6.1 Introduction......................................................................................................................................... 16
6.2 Connections ........................................................................................................................................ 17
6.3 Start-Up Procedure .......................................................................................................................... 18
6.4 Login....................................................................................................................................................... 18
6.5 Dashboard............................................................................................................................................ 19
6.5.1 Quick Access................................................................................................................................................................. 21
6.6 GAS / Diagnostics.............................................................................................................................. 23
6.6.1 Active Alarms ...............................................................................................................................................................23
6.6.2 Measurements.............................................................................................................................................................23
6.6.3 Duval Triangle ..............................................................................................................................................................24
6.6.4 Gas Ratio ........................................................................................................................................................................25
6.6.5 Scheduler ....................................................................................................................................................................... 26
6.7 Calculations......................................................................................................................................... 26
6.7.1 Gas Ratios......................................................................................................................................................................26
6.7.2 Relative Saturation....................................................................................................................................................27
6.7.3 Gas Rate of Change ................................................................................................................................................... 27
6.7.4 Analog Inputs RoC Configuration .......................................................................................................................28
6.8 Alarms ................................................................................................................................................... 29
6.8.1 Gases................................................................................................................................................................................ 29
6.8.2 Gas Ratios......................................................................................................................................................................30
6.8.3 Gas Rate of Change ................................................................................................................................................... 31
6.8.4 Relative Saturation....................................................................................................................................................32
6.8.5 Analog Inputs ............................................................................................................................................................... 32
6.8.6 Analog Inputs Rate of Change..............................................................................................................................33
6.8.7 Digital Inputs ................................................................................................................................................................33
6.8.8 Digital Inputs Transition Total..............................................................................................................................34
6.9 Peripherals........................................................................................................................................... 35
6.9.1 Peripheral Scheduler ................................................................................................................................................ 35
6.9.2 Analog Inputs ............................................................................................................................................................... 35
6.9.3 Digital Inputs ................................................................................................................................................................36
6.9.4 Input Measurements ................................................................................................................................................ 36
6.10 Settings ................................................................................................................................................. 37
6.10.1 Communications ........................................................................................................................................................37
6.10.2 Date & Time ..................................................................................................................................................................38

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 3 of 92
6.10.3 SMS Alerting.................................................................................................................................................................. 38
6.10.4 Firewall............................................................................................................................................................................39
6.10.5 Communication Services........................................................................................................................................40
6.11 Service ................................................................................................................................................... 41
6.11.1 Measurement...............................................................................................................................................................41
6.11.2 Controller Reprogramming.................................................................................................................................... 42
6.11.3 I/O PCB Reprogramming .........................................................................................................................................43
6.11.4 Oxygen Sensor.............................................................................................................................................................44
6.11.5 Gas Normalization ..................................................................................................................................................... 45
6.11.6 Factory............................................................................................................................................................................. 45
6.11.7 User Administration..................................................................................................................................................48
6.12 TransOpto ............................................................................................................................................ 50
6.12.1 Measurements.............................................................................................................................................................50
6.12.2 Rate of Change ............................................................................................................................................................ 50
6.12.3 Alarms..............................................................................................................................................................................51
6.12.4 Rate of Change Alarms ............................................................................................................................................ 52
6.12.5 Channels.........................................................................................................................................................................53
6.12.6 Settings ........................................................................................................................................................................... 53
6.13 Logout.................................................................................................................................................... 54
6.14 Shutdown Procedure....................................................................................................................... 55
6.15 Error Notifications ............................................................................................................................ 56
6.15.1 Error Codes....................................................................................................................................................................58
6.15.2 Other Notifications.................................................................................................................................................... 59
7Manual Oil Sampling ...............................................................................60
7.1 Sampling Arrangement................................................................................................................... 60
7.2 Local HMI for manual sampling ................................................................................................... 61
7.3 Sampling Process.............................................................................................................................. 65
8Communications .....................................................................................67
8.1 DNP3 ...................................................................................................................................................... 67
8.2 IEC 61850 ............................................................................................................................................. 67
8.3 Modbus Protocol ............................................................................................................................... 67
8.4 HTTP / HTTPS Protocol.................................................................................................................... 67
9Technical Support ...................................................................................67
Appendix A Security Configuration............................................................68
Appendix B Transportation PGA Lock........................................................75
Appendix C Maintenance Activities ...........................................................79
Appendix D Time Sync Implementation.....................................................85
Appendix E Alarm Settings: General Advice .............................................87
Contact & Copyright Details ..........................................................................92

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 4 of 92
List of Tables and Figures
Page
Figure 1-1: Inside the DGA 900 ................................................................................................................................................7
Table 1-1: Hub front panel LED lights ...................................................................................................................................9
Table 3-1: Measurements........................................................................................................................................................ 12
Table 4-1: Type tests .................................................................................................................................................................. 14
Figure 5-1: Fuse holder ............................................................................................................................................................. 15
Table 5-1: External LED status indicators ........................................................................................................................ 15
Figure 6-1: Inside the Hub –LCD top left.......................................................................................................................... 16
Figure 6-2: Ethernet / USB HMI connection .................................................................................................................... 17
Figure 6-3: Log-in page............................................................................................................................................................. 18
Table 6-1: User access rights................................................................................................................................................. 18
Figure 6-4: Local HMI: Quick Access page....................................................................................................................... 19
Figure 6-5: Dashboard .............................................................................................................................................................. 20
Figure 6-6: Quick Access.......................................................................................................................................................... 21
Figure 6-7: Quick Access –Rapid Mode............................................................................................................................ 22
Figure 6-8: Active Alarms......................................................................................................................................................... 23
Figure 6-9: Measurements...................................................................................................................................................... 24
Figure 6-10: Duval Diagnostic ............................................................................................................................................... 25
Figure 6-11: Gas Ratio............................................................................................................................................................... 25
Figure 6-12: DGA Scheduler ................................................................................................................................................... 26
Figure 6-13: Gas Ratio Settings............................................................................................................................................. 26
Figure 6-14: Gas Ratio Settings –Ratio 1 definition.................................................................................................... 26
Figure 6-15: Relative Saturation Settings ........................................................................................................................ 27
Figure 6-16: Gas RoC Configuration................................................................................................................................... 27
Figure 6-17: Analog Inputs Rate of Change Configuration..................................................................................... 28
Figure 6-18: Gas Alarms Configuration............................................................................................................................. 29
Figure 6-19: Hydrogen alerts................................................................................................................................................. 30
Figure 6-20: Gas Ratio Alarms Configuration ................................................................................................................ 30
Figure 6-21: Gas Ratio Alarms Configuration –Ratio 1 High-High Gas Rate of Change.......................... 30
Figure 6-22: Gas RoC Configuration................................................................................................................................... 31
Figure 6-23: Relative Saturation Alarms Configuration ............................................................................................ 32
Figure 6-24: Relative Saturation Alarms Configuration –High-High.................................................................. 32
Figure 6-25: Analog Inputs Alarms Configuration ....................................................................................................... 32
Figure 6-26: Analog Inputs RoC Alarms Configuration.............................................................................................. 33
Figure 6-27: Digital Inputs Alarms Configuration......................................................................................................... 33
Figure 6-28: Digital Inputs Transition Total Alarms Configuration ...................................................................... 34
Figure 6-29: Peripheral Scheduler....................................................................................................................................... 35
Figure 6-30: Analog Inputs Configuration ....................................................................................................................... 35
Figure 6-31: Analog Input 4 (4-20 mA Temperature Sensor).................................................................................. 36
Figure 6-32: Digital Input Configuration........................................................................................................................... 36
Figure 6-33: Input Measurements....................................................................................................................................... 36
Figure 6-34: Communications Settings............................................................................................................................. 37
Figure 6-35: Date & Time ......................................................................................................................................................... 38
Figure 6-36: SMS Alerting......................................................................................................................................................... 38
Figure 6-37: Firewall configuration..................................................................................................................................... 39
Figure 6-38: Communication Services .............................................................................................................................. 40
Figure 6-39: Measurement Settings ................................................................................................................................... 41
Figure 6-40: Controller Reprogramming.......................................................................................................................... 42
Figure 6-41: Upgrade in progress........................................................................................................................................ 42
Figure 6-42: I/O Board Reprogramming........................................................................................................................... 43
Figure 6-43: Upgrade in progress........................................................................................................................................ 43
Figure 6-44: Oxygen Sensor ................................................................................................................................................... 44

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 5 of 92
Figure 6-45: Gas Normalization Settings ......................................................................................................................... 45
Figure 6-46: Factory Settings................................................................................................................................................. 45
Table 6-2: Factory Settings: Data and configuration cleardown ......................................................................... 47
Figure 6-47: Simulation mode ............................................................................................................................................... 48
Figure 6-48: Restart the device............................................................................................................................................. 48
Figure 6-49: User Administration......................................................................................................................................... 48
Figure 6-50: Change Password............................................................................................................................................. 49
Table 6-3: Password Strength ............................................................................................................................................... 49
Figure 6-51: TransOpto Measurements............................................................................................................................ 50
Figure 6-52: TransOpto RoC Configuration..................................................................................................................... 50
Figure 6-53: TransOpto Alarms Configuration .............................................................................................................. 51
Figure 6-54: Channel 1 High alerts...................................................................................................................................... 51
Figure 6-55: TransOpto RoC Alarms Configuration..................................................................................................... 52
Figure 6-56: Channel 2 High-High alerts.......................................................................................................................... 52
Figure 6-57: TransOpto Channels Settings...................................................................................................................... 53
Figure 6-58: TransOpto Settings........................................................................................................................................... 53
Figure 6-59: Logout .................................................................................................................................................................... 54
Figure 6-60: Log-in page.......................................................................................................................................................... 54
Figure 6-61: System Info –Standby.................................................................................................................................... 55
Figure 6-62: Measurement started..................................................................................................................................... 55
Figure 6-63: PGA and Oxygen Sensor Error States ..................................................................................................... 56
Figure 6-64: PGA Errors............................................................................................................................................................. 57
Table 6-4: PGA Errors ................................................................................................................................................................. 58
Table 6-5: Oxygen sensor error codes .............................................................................................................................. 59
Figure 65: MicroSD card memory usage.......................................................................................................................... 59
Figure 7-1: Oil filter and oil ports (front view of Analysis module)........................................................................ 60
Figure 7-2: Valve orientation.................................................................................................................................................. 61
Figure 7-3: Sampling assembly............................................................................................................................................. 61
Figure 7-4: Luer fitting on assembly................................................................................................................................... 61
Figure 7-5: Local HMI: Quick Access................................................................................................................................... 61
Figure 7-6: Manual Sampling................................................................................................................................................. 62
Figure 7-7: Purging Oil............................................................................................................................................................... 62
Figure 7-8: Take manual oil sample ................................................................................................................................... 63
Figure 7-9: Manual Sampling cannot be started ......................................................................................................... 63
Figure 7-10: Dashboard: Stop Measurement................................................................................................................. 64
Figure 7-11: Manual oil sampling flowchart................................................................................................................... 65
Table A-1: External Interfaces................................................................................................................................................ 69
Table A-2: Protocols.................................................................................................................................................................... 69
Figure A-1: Settings > Communication Services........................................................................................................... 70
Figure A-2: Communication Services................................................................................................................................. 70
Figure A-3: Firewall Settings................................................................................................................................................... 72
Figure A-4: Default policy options........................................................................................................................................ 73
Figure A-5: Specific policy options....................................................................................................................................... 73
Figure A-6: LAN interface......................................................................................................................................................... 73
Figure A-7: LAN interface......................................................................................................................................................... 73
Figure A-8: Accept HTTPS ........................................................................................................................................................ 74
Figure B-1: PGA lock –engaged ........................................................................................................................................... 75
Figure B-2: PGA lock –pins and locking bracket secured with cable ties........................................................ 75
Figure B-3: PGA lock –remove pins.................................................................................................................................... 76
Figure B-4: PGA lock –remove plastic nuts .................................................................................................................... 76
Figure B-5: PGA lock –remove metal bracket............................................................................................................... 76
Figure B-6: PGA lock –insert metal bracket ................................................................................................................... 77
Figure B-7: PGA lock –attach plastic nuts....................................................................................................................... 77
Figure B-8: PGA lock –insert pins ........................................................................................................................................ 77

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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 7 of 92
1INTRODUCTION
1.1 Product Overview
The Kelman™ DGA 900 (the product) is a multigas online DGA (Dissolved Gas Analysis) and
moisture monitoring system for implementing Asset Performance Management (APM)
across electrical generation, transmission, distribution and industrial applications.
The product as shown in Figure 1-1 can detect and diagnose incipient faults and trend
asset health via the monitoring of critical gases including moisture in the transformer oil.
This includes any mineral oil or ester-based fluid (natural or synthetic). The product
measures nine certified fault gases: hydrogen, methane, ethane, ethylene, carbon
monoxide, carbon dioxide, acetylene, oxygen, nitrogen as well as water content and the
transformer load current. Such data provides insight on transformer condition criteria,
such as developing faults, paper degradation and electrical arcing.
Once installed, operation is intuitive and programmable. The product can be managed
remotely over a network via a web-based interface or locally via a touchscreen interface.
All results are stored within the product, but online management is recommended. Results
and the full product database can also be downloaded to a PC for analysis, aggregation and
trending with the Perception software suite.
Figure 1-1: Inside the DGA 900
The product features:
▪An innovative two-enclosure design connecting the two modules by a Power,
Communications and Control (PCC) cable for a more flexible installation configuration.
The Analysis module contains the PGA measurement technology, whereas the Hub
module contains the communications technology and HMI screen. The modules have
IP56-rated aluminium enclosures (compliant in the installed upright position) and are
powder coated to the RAL 9002 colour.
▪Automated headspace gas extraction manifold to extract target gases from the oil
sample.

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 8 of 92
▪Advanced high precision Photo-Acoustic Spectroscopy (PAS) sensing technology based
on a robust multi-point individual gas calibration process using certified gases to
calibrate the PGA (Photoacoustic Gas Analyser).
▪Complete multi-gas analysis (nine gases and moisture) with a user-configurable
sampling frequency from once per hour to once every four weeks including remote alert
capabilities. All gas sensing is carried out internally without a need for carrier gases or
recalibration. Minimal maintenance*1 and no requirement for costly consumables.
▪A new ‘Rapid Mode’ allows sampling to be completed in around 30 minutes using five
key gases and is useful in critical situations to give immediate insight on fast-developing
faults.
▪Improved lower detection limits and measurement repeatability for earlier detection of
imminent faults on the transformer being monitored.
▪Transformer load tracking (CT analogue input as standard).
▪Watchdog relay as standard to monitor power usage.
▪Six configurable relay contacts based on absolute gas and moisture values (with one
dedicated service).
▪Five optional 4-20 mA configurable analogue input cards.
▪Three digital inputs (optional configurations available).
▪Compatible with AC or DC power.
▪Four sunlight-visible LED arrays on the exterior of the Hub module —red for alarm,
yellow for caution (both user-configurable) —and green for power, blue for service.
▪A fully embedded microprocessor with 4 GB non-volatile internal memory storage,
highly scalable analogue and digital I/Os, an embedded webserver, 8 GB SD card to hold
measurement data and an integrated 7 in. colour LCD screen with resistive touch for
simplified local user interaction and visualization of data.
▪The infrastructure provides a platform for expansion and future feature enhancements
complemented by an extensive range of secure communications options. These include
Ethernet, RS-485, cellular modem (SMS Text Alerts /GPRS), and fibre optic options
(IEC61850 or DNP3). Internal USB connection is provided for commissioning and service,
or local data download. Other options may be available on request.
▪Compatibility with GE’s Perception transformer fleet management software for data
download, trending and analysis as well as other SCADA systems. The product is a DS-
Agile and Predix-Grid APM ready device with support for industry standard protocols.
*1 Note: The only recommended maintenance is periodic cleaning of the air filters, in-line
oil filter and battery replacement.

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 9 of 92
1.2 Scope
This guide outlines the use of the HMI, manual sampling function and general maintenance
activities.
1.3 Front Panel LEDs
Table 1-1 outlines the LEDs on the front panel of the Hub module.
Table 1-1: Hub front panel LED lights
LED Colour
Symbol
Meaning
Alarm
A measured parameter has exceeded a user-programmed
“alarm” threshold.
Caution
A measured parameter has exceeded a user-programmed
“warning” threshold.
Power
24 V Power OK.
Service
Service required. Triggered by a warning service event if the
product detects internal issues or if equipment settings are
exceeded. If scheduled, the product will still attempt another
measurement and clear any service condition if the issue is no
longer present.

MA-025 –DGA 900 Operator Guide –Rev 2.0 12-Apr-19 Page 10 of 92
2SAFETY
2.1 Symbols
The meaning of symbols used on the Kelman™ DGA 900:
Caution. Refer to the Installation Manual / Operator Guide to prevent death,
bodily injury, equipment damage or loss of data.
Electrical Hazard. Risk of electric shock.
Primary Protective Earth connection.
Hot surfaces may be present.
The meaning of symbols used in this guide:
Warning: A procedure, practice, or condition could cause death or serious
injury and/or significant equipment damage.
[Caution]: A procedure, practice, or condition could cause minor injury,
equipment damage or loss of data.
Electrical Hazard: Risk of electric shock.
Hot surfaces may be present.
2.2 Warnings
The following warnings must be observed:
WARNING: The minimum ambient temperature for installation and service
activities is −10 °C.
WARNING: If the equipment is installed or used in a manner not specified by
the manufacturer, the protection provided by the equipment may be
impaired.
WARNING: If working at height, third parties must have received appropriate
training for working at height prior to work commencing. This includes, but is