GE Hydran 201i User manual

GE Grid Solutions (UK) Ltd
Lissue Industrial Estate East, Unit 1, 7 Lissue Walk,
Lisburn, United Kingdom BT28 2LU
Tel: [phone],
Email: GA.supp[email protected]
Web: www.gegridsolutions.com/MD.htm
MA-033 Rev. 14.0, 12-Nov-18
Hydran* 201i System
Transformer Gas Monitoring System
Instruction Manual

MA-033 Rev. 14.0, 12-Nov-18
Hydran* 201iInstruction Manual
Page 2
Copyright Notice and Proprietary Rights
© 2003-2018, General Electric Company. All rights reserved.
The contents of this manual and the information contained herein are the exclusive
property of General Electric Company, except as otherwise indicated.
You may not disclose, reproduce, publish, license, post, transmit or distribute this
manual, in whole or in part, without the prior written permission of General Electric or
except as permitted by written license agreement with General Electric.
General Electric has made every reasonable attempt to ensure the completeness and
accuracy of this manual. However, the information contained in this manual is subject to
change without notice, and does not represent a commitment on the part of General
Electric.
Any included or attached hardware schematics and technical descriptions, or software
listings that disclose source code, are for information purposes only. Reproduction, in
whole or in part, to create working hardware or software for other than General Electric
products is strictly prohibited, except as permitted by written license agreement with
General Electric.
Trademark Notices
GE, Hydran and are trademarks and service marks of General Electric Company.
Access, Microsoft and Windows are trademarks or registered trademarks of Microsoft
Corporation in the United States and/or other countries.
Other company or product names mentioned in this document may be trademarks or
registered trademarks of their respective companies.
Customer Service
For information on Grid Solutions products, please contact:
GE Grid Solutions (UK) Ltd
Lissue Industrial Estate East
Unit 1, 7 Lissue Walk, Lisburn, United Kingdom BT28 2LU
Tel: [phone]
Fax: [phone]
Web: www.gegridsolutions.com/MD.htm
For help and support for your Hydran* 201iSystem, please contact the the GE Customer
Service Center. Open 24 hours a day, 365 days a year.
Tel: [phone] (United States and Canada)
Tel: [phone] (worldwide)
Email: [email protected]

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Contents
Copyright Notice and Proprietary Rights ..................................................................................................2
Trademark Notices ...........................................................................................................................................2
Customer Service ..............................................................................................................................................2
1PRELIMINARY INFORMATION.................................................................................................. 13
1.1Safety Warnings in Six Languages .................................................................................................13
1.1.1 [EN] (In English) WARNINGS: ................................................................................................ 13
1.1.2 [FR] (In French) ATTENTION: ................................................................................................. 13
1.1.3 [ES] (In Spanish) ADVERTENCIA:.......................................................................................... 13
1.1.4 [DE] (In German) WARNUNG:............................................................................................... 14
1.1.5 [IT] (in Italian) ATTENZIONE:.................................................................................................. 14
1.1.6 [SV] (In Swedish) VARNING: .................................................................................................. 14
1.2 Safety Symbols Description............................................................................................................... 15
1.3 Preface...................................................................................................................................................... 15
1.4 Standard General Electric Warranty..............................................................................................17
2INTRODUCTION......................................................................................................................... 19
2.1 The Hydran 201i System ....................................................................................................................19
2.2 Components of the Hydran 201i System ..................................................................................... 20
2.2.1 Hydran 201Ti Intelligent Transmitter ............................................................................... 20
2.2.2 Hydran 201Ci Communications Controller.................................................................... 21
2.2.3 Hydran 201Ci-1 One Channel Controller........................................................................ 22
2.2.4 Hydran Host Software........................................................................................................... 22
2.3 Networking and Communications Capabilities.......................................................................... 23
2.4 Description of the Hydran 201i systems....................................................................................... 24
2.5 Accessories.............................................................................................................................................. 25
2.5.1 Hydran 201TW Tube Wrench ............................................................................................. 25
2.5.2 Vibration Absorbing Pads..................................................................................................... 26
3HYDRAN 201TI INTELLIGENT TRANSMITTER ........................................................................ 27
3.1 Features.................................................................................................................................................... 27
3.2 Enclosure.................................................................................................................................................. 28
3.3 External Components.......................................................................................................................... 28
3.4 Internal Components........................................................................................................................... 29
3.4.1 Brass Adapter........................................................................................................................... 30
3.4.2 Heating Plate ............................................................................................................................ 31

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3.4.3 Hydran 201 Sensor................................................................................................................. 31
3.4.4 CPU Module............................................................................................................................... 32
3.4.5 USB Type B Connector for Communication................................................................... 32
3.4.6 I/O Module ................................................................................................................................. 32
3.5 Analog Inputs and Output ................................................................................................................. 37
3.5.1 Analog Inputs............................................................................................................................ 37
3.5.2 Analog Output .......................................................................................................................... 37
3.6 Heating System .....................................................................................................................................38
3.7 Battery ...................................................................................................................................................... 38
3.7.1 Estimated Life........................................................................................................................... 38
3.7.2 Battery Specifications............................................................................................................ 39
3.7.3 Removing the Battery............................................................................................................ 39
3.7.4 Replacing the Battery ............................................................................................................ 40
3.7.5 Resetting the Clock................................................................................................................. 40
3.7.6 Discarding the Battery .......................................................................................................... 41
3.8 Internal Clock.......................................................................................................................................... 41
3.9 Nonvolatile Memory............................................................................................................................. 42
3.10 Additional Information ........................................................................................................................42
4HYDRAN 201CI CONTROLLERS ............................................................................................... 43
4.1 Hydran 201Ci-C Communications Controller ............................................................................. 43
4.1.1 Features...................................................................................................................................... 43
4.1.2 Description of Major Components .................................................................................... 44
4.1.3 Description of Circuit Board ................................................................................................ 45
4.1.4 Additional Information .......................................................................................................... 48
4.2 Hydran 201Ci-1 One Channel Controller...................................................................................... 48
4.2.1 Features...................................................................................................................................... 48
4.2.2 Description of Major Components .................................................................................... 50
4.2.3 Description of Circuit Board ................................................................................................ 52
4.2.4 Additional Information .......................................................................................................... 55
5HYDRAN 201TI DISPLAYS & MENUS ....................................................................................... 56
5.1 User Interface.........................................................................................................................................56
5.2 User Interface Operating Modes ..................................................................................................... 57
5.2.1 Unacknowledged Alarms Mode......................................................................................... 58
5.2.2 Main Display Mode ................................................................................................................. 58

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5.2.3 Menu Navigation Mode......................................................................................................... 59
5.2.4 Parameter Modification Mode............................................................................................ 59
5.2.5 Power Up Mode........................................................................................................................ 60
5.3 Using the Keypad’s Keys According to Each Mode................................................................... 62
5.4 Passwords ............................................................................................................................................... 63
5.5 Main and Extended Menus ................................................................................................................ 63
5.5.1 History Submenu..................................................................................................................... 65
5.5.2 Gas Submenu ........................................................................................................................... 69
5.5.3 Temperature Submenu......................................................................................................... 70
5.5.4 Service Submenu .................................................................................................................... 71
5.5.5 Date & Time Submenu (Extended Menu Only) .............................................................. 73
5.5.6 Communication Submenu (Extended Menu Only)....................................................... 73
5.5.7 Relays/Analog Submenu (Extended Menu Only).......................................................... 75
5.5.8 New Sensor Submenu (Extended Menu Only)............................................................... 77
5.5.9 Calibration Submenu (Extended Menu Only)................................................................. 77
6BEFORE INSTALLATION............................................................................................................ 79
6.1 General Warnings................................................................................................................................. 79
6.2 Installation Overview ...........................................................................................................................85
6.2.1 Tools and Material Required ............................................................................................... 87
6.2.2 Mounting Location of the Hydran 201Ti ......................................................................... 87
6.2.3 Mounting Location of Hydran 201Ci Controllers ......................................................... 90
6.2.4 Cabling and Network Configuration................................................................................. 91
6.3 Installation............................................................................................................................................... 93
7HYDRAN 201TI INSTALLATION................................................................................................ 94
7.1 Incoming Inspection and Verification............................................................................................ 94
7.1.1 Receiving and Unpacking..................................................................................................... 94
7.1.2 Shipping List.............................................................................................................................. 94
7.1.3 Inspecting .................................................................................................................................. 95
7.1.4 Storage and Battery Care .................................................................................................... 98
7.2 Verification of Operation Prior to Installation ............................................................................. 98
7.2.1 Preparation................................................................................................................................ 98
7.2.2 Initial Observations................................................................................................................. 99
7.2.3 Adjusting the Data and Time ............................................................................................100

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7.2.4 Verifying the Alarm Relays.................................................................................................100
7.2.5 Verifying the Backup Battery ............................................................................................102
7.2.6 Sensor Serial Number Verification and Sensor Test.................................................103
7.2.7 Adjusting the Temperature Set Point.............................................................................103
7.2.8 Verifying the Analog Output (Optional)..........................................................................104
7.2.9 Verifying the USB Communication (Optional)..............................................................104
7.2.10 Completing the Verification...............................................................................................105
7.3 Installation.............................................................................................................................................106
7.3.1 Verifying the AC Power Supply Voltage and the Serial Numbers ........................107
7.3.2 Preparing the Hydran 201Ti ..............................................................................................107
7.3.3 Preparing the Valve..............................................................................................................108
7.3.4 Installing the Brass Adapter onto the Valve ................................................................109
7.3.5 Installing the Hydran 201 Sensor ....................................................................................110
7.3.6 Opening the Valve.................................................................................................................110
7.3.7 Fastening the Hydran 201Ti to the Brass Adapter....................................................111
7.3.8 Installing the Cable Conduits ............................................................................................112
7.3.9 Installing the Supervisory Link and Analog Output Cable ......................................113
7.3.10 Installing the Alarms Cable (Optional)............................................................................114
7.3.11 Installing the AC Power Supply Cable ............................................................................114
7.3.12 Installing the CPU Module ..................................................................................................115
7.3.13 Verifying the Hydran 201Ti Operation...........................................................................116
7.4 Configuring the Hydran 201Ti ........................................................................................................116
7.4.1 Setting the Comms Parameters for Hydran Host or Perception Software.......117
7.4.2 Verifying and Setting Historical Data File Parameters.............................................117
7.4.3 Verifying and Setting Gas and Trend Alarm Parameters........................................117
7.4.4 Resetting the Hourly Trend, Daily Trend and Period B.............................................118
7.4.5 Verifying and Setting the Temperature Parameters of the Hydran 201
Sensor........................................................................................................................................118
7.4.6 Verifying the Hydran 201 Sensor and its Parameters..............................................118
7.4.7 Verifying and Setting the Battery Alarm Parameters...............................................119
7.4.8 Logging the Values of the Service Data........................................................................119
7.4.9 Verifying and Setting the Date and Time......................................................................119
7.4.10 Verifying and Setting the Communications Parameters ........................................119
7.4.11 Verifying and Setting the Operation Mode of the Alarm Relays...........................120

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7.4.12 Verifying and Setting the Fail Alarm Conditions.........................................................120
7.4.13 Verifying and Setting the Operation Mode of the Analog Output and TDM
Signal.........................................................................................................................................120
7.4.14 Conclusion ...............................................................................................................................120
7.5 Fastening the Hydran 201Ti’s Cover ............................................................................................121
7.6 Commissioning ....................................................................................................................................121
7.7 Other Installations ..............................................................................................................................121
8HYDRAN 201CI-C INSTALLATION .........................................................................................122
8.1 Incoming Inspection and Verification..........................................................................................122
8.1.1 Receiving and Unpacking...................................................................................................122
8.1.2 Inspecting ................................................................................................................................122
8.1.3 Storage......................................................................................................................................123
8.2 Verification of Operation Prior to Installation ...........................................................................123
8.2.1 Preparation..............................................................................................................................123
8.2.2 Initial Observations...............................................................................................................124
8.2.3 Verification of RS-232 or USB and RS-485 Communications................................124
8.2.4 Completing the Verification...............................................................................................125
8.3 Installation.............................................................................................................................................126
8.3.1 Verifying the AC Power Supply Voltage and the Serial Numbers ........................126
8.3.2 Installing the Enclosure.......................................................................................................126
8.3.3 Installing the Cable Conduits ............................................................................................126
8.3.4 Installing the Supervisory Link Cables ...........................................................................127
8.3.5 Installing the AC Power Supply.........................................................................................128
8.3.6 Verifying the Operation.......................................................................................................128
8.3.7 Verifying the Supervisory Link Communications .......................................................128
8.3.8 Conclusion ...............................................................................................................................128
8.4 Other Installations ..............................................................................................................................129
9HYDRAN 201CI-1 INSTALLATION.......................................................................................... 130
9.1 Incoming Inspection and Verification..........................................................................................130
9.1.1 Receiving and Unpacking...................................................................................................130
9.1.2 Inspecting ................................................................................................................................130
9.1.3 Storage......................................................................................................................................131
9.2 Verification of Operation Prior to Installation ...........................................................................131

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9.2.1 Preparation..............................................................................................................................131
9.2.2 Initial Observations...............................................................................................................132
9.2.3 Verifying the Analog Output..............................................................................................132
9.2.4 Verifying the Alarm Indicators and Relays...................................................................133
9.2.5 Verifying the RS 232 or USB Communications ...........................................................136
9.2.6 Conclusion ...............................................................................................................................136
9.3 Installation.............................................................................................................................................138
9.3.1 Verifying the AC Power Supply Voltage and the Serial Numbers ........................138
9.3.2 Installing the Enclosure.......................................................................................................138
9.3.3 Installing the Cable Conduits ............................................................................................138
9.3.4 Installing the Supervisory Link Cable .............................................................................139
9.3.5 Installing the Analog Output Cable (Optional).............................................................139
9.3.6 Installing the Alarms Cable (Optional)............................................................................140
9.3.7 Installing the AC Power Supply Cable ............................................................................140
9.3.8 Verifying the Operation.......................................................................................................141
9.3.9 Verifying the Analog Outputs............................................................................................141
9.3.10 Verifying the Alarm Indicators and Alarm Relays......................................................141
9.3.11 Verifying the Supervisory Link Communications .......................................................141
9.3.12 Conclusion ...............................................................................................................................141
9.4 Other Installations ..............................................................................................................................142
10 COMMUNICATIONS & NETWORKING................................................................................... 143
10.1 Communications for Hydran 201R Model i or Hydran 201i System, Using a
Supervisory Link............................................................................................................................................143
10.1.1 TDM Pulse.................................................................................................................................144
10.2 Communications in a Network, using an RS-485 Local Network Link and Hydran
201Ci controllers...........................................................................................................................................145
10.3 Communications with a Host Computer....................................................................................146
10.3.1 Local Communications using USB communication link..........................................147
10.3.2 Local Communications using RS-485 serial communication link........................147
10.3.3 Remote Communications (via Modem) .........................................................................148
10.4 Communication Protocol .................................................................................................................151
10.5 Local Network Installation...............................................................................................................152
10.5.1 Installing an RS-485 Local Network Link between Hydran 201 Tis or
between 201 Ci Controllers ...............................................................................................152

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10.5.2 Connecting a Host Computer to a Hydran 201Ci Controller in a Local
Network, using an RS-485 Cable.....................................................................................153
10.5.3 Verifying RS-232 or USB and RS-485 Communications..........................................153
10.6 Optional Modem Installation...........................................................................................................154
10.6.1 Connecting a Telephone Line ...........................................................................................154
10.6.2 Verifying Communications between the Two Modems ..........................................154
10.6.3 Configuring the Call OnAlarm Mode...............................................................................155
11 ALARMS.....................................................................................................................................156
11.1 Alarm Levels..........................................................................................................................................157
11.1.1 Alarm Conditions...................................................................................................................157
11.1.2 Purpose of Hourly and Daily Trends...............................................................................158
11.2 Alarm Relays.........................................................................................................................................158
11.2.1 Alarm Contacts ......................................................................................................................159
11.2.2 Status of Alarm Relays ........................................................................................................159
11.2.3 Operation Modes of Alarm Relays...................................................................................160
11.3 Alarm Interface....................................................................................................................................161
11.4 Gas High and High-High Alarms ...................................................................................................162
11.4.1 Alarm Parameters Setting..................................................................................................162
11.4.2 Guidelines for Setting Trend Alarms...............................................................................164
11.4.3 Hourly and Daily Trend Computations ..........................................................................165
11.4.4 High and High-High Alarms Triggering.........................................................................166
11.4.5 High and High-High Alarms Cancellation ....................................................................167
11.5 Fail Alarm ...............................................................................................................................................167
11.5.1 Fail Alarm Triggering............................................................................................................167
11.5.2 Fault Triggers..........................................................................................................................168
11.5.3 Fail Alarm Cancellation .......................................................................................................171
12 OPERATING THE HYDRAN 201I SYSTEM ..............................................................................172
12.1 Operating Methods.............................................................................................................................172
12.1.1 Periodic, Visual Monitoring ................................................................................................172
12.1.2 Alarm Monitoring...................................................................................................................173
12.1.3 Analog Output Monitoring .................................................................................................173
12.1.4 Combined Alarm and Analog Output Monitoring......................................................174
12.1.5 Local Monitoring With Host Computer..........................................................................175

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12.1.6 Remote Monitoring With Host Computer.....................................................................175
12.2 Data Reading........................................................................................................................................176
12.2.1 Direct Data Reading.............................................................................................................176
12.2.2 Historic Data Reading..........................................................................................................177
12.3 Data Analysis........................................................................................................................................177
13 TROUBLESHOOTING ...............................................................................................................178
13.1 Alarm Messages on the Hydran 201Ti’s Display......................................................................178
13.1.1 Battery L ...................................................................................................................................179
13.1.2 Battery LL.................................................................................................................................179
13.1.3 CableOpen ...............................................................................................................................179
13.1.4 CableShort ...............................................................................................................................180
13.1.5 DayTrend H..............................................................................................................................181
13.1.6 DayTrend HH ..........................................................................................................................181
13.1.7 DayTrend L...............................................................................................................................182
13.1.8 DayTrend LL ............................................................................................................................182
13.1.9 Gas H .........................................................................................................................................183
13.1.10 Gas HH ...................................................................................................................................183
13.1.11 Gas L .......................................................................................................................................183
13.1.12 Gas LL .....................................................................................................................................184
13.1.13 HourTrend H.........................................................................................................................184
13.1.14 HourTrend HH......................................................................................................................184
13.1.15 HourTrend L..........................................................................................................................185
13.1.16 HourTrend LL .......................................................................................................................185
13.1.17 Replace SensNOW .............................................................................................................185
13.1.18 Sensor Not Inst....................................................................................................................186
13.1.19 SensTemp H .........................................................................................................................186
13.1.20 SensTemp HH ......................................................................................................................187
13.1.21 SensTemp L ..........................................................................................................................187
13.1.22 SensTemp LL ........................................................................................................................188
13.1.23 Setup Lost .............................................................................................................................188
13.2 RS-232, USB and/or RS-485 Communications.........................................................................189
13.2.1 No Communication when the Host Computer is connected directly or by
Modem to the Hydran 201Ti’s USB Connector...........................................................189

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13.2.2 No Communication when the Host Computer is connected directly or by
Modem to the Hydran 201Ci Controller’s DB-9 or USB Connector .....................189
13.2.3 No Communication between the Host Computer and the Network of
Hydran 201i Systems...........................................................................................................190
13.3 Hydran 201Ci Controller’s Display is Blank................................................................................190
13.4 Hydran 201Ti and Hydran 201Ci Controller’s Analog Outputs at Zero............................190
13.5 Alarms .....................................................................................................................................................191
13.5.1 Fail Alarm is Triggered.........................................................................................................191
13.5.2 Fail Alarm Message Displayed in the Hydran Host Software................................191
13.5.3 Intermittent Gas Alarms are Occurring.........................................................................191
13.5.4 An Alarm Relay does not Reset, even if the Alarm Condition has
Disappeared............................................................................................................................191
13.5.5 Irregular Gas Readings........................................................................................................191
13.5.6 Inaccurate Gas Readings...................................................................................................192
13.5.7 Gas Level Reading is Abnormally High..........................................................................192
13.5.8 Gas Level is Slowly Decreasing towards Zero.............................................................192
14 MAINTENANCE ........................................................................................................................193
14.1 Cleaning the Enclosure Exterior.....................................................................................................193
14.2 Replacing the Fuse .............................................................................................................................194
14.3 Replacing the Battery........................................................................................................................194
14.4 Periodic Maintenance........................................................................................................................194
14.5 Historic Data Verification .................................................................................................................196
14.6 Dissolved Gas Analysis (DGA)..........................................................................................................196
14.7 Hydran 201Ti Verification.................................................................................................................197
14.8 Hydran 201Ci Controller Verification ...........................................................................................199
14.9 Fuse..........................................................................................................................................................199
15 DECOMMISSIONING THE HYDRAN 201TI ............................................................................200
15.1 Powering Off .........................................................................................................................................200
15.2 Cable Disconnection..........................................................................................................................200
15.3 Removing the Hydran 201Ti............................................................................................................201
APPENDIX A : TECHNICAL SPECIFICATIONS FOR THE HYDRAN 201I SYSTEM ......................202
A.1 Hydran 201Ti Intelligent Transmitter ...........................................................................................202
A.2 Hydran 201Ci-C Communications Controller ...........................................................................205
A.3 Hydran 201Ci-1 One-Channel Controller ...................................................................................207
APPENDIX B : MECHANICAL DRAWINGS.....................................................................................211
B.1 Hydran 201Ti Intelligent Transmitter ...........................................................................................211

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B.2 Hydran 201Ci-C Communications Controller ...........................................................................214
B.3 Hydran 201Ci-1 One-Channel Controller ...................................................................................215
APPENDIX C : FUNCTIONAL BLOCK DIAGRAMS......................................................................... 216
C.1 Hydran 201Ti Intelligent Transmitter ...........................................................................................216
C.2 Hydran 201Ci-C Communications Controller ...........................................................................217
C.3 Hydran 201Ci-1 One-Channel Controller ...................................................................................218
APPENDIX D : TERMINAL BLOCKS AND CONNECTORS ............................................................219
D.1 Hydran 201Ti Intelligent Transmitter ...........................................................................................219
D.2 Hydran 201Ci-C Communications Controller ...........................................................................223
D.3 Hydran 201Ci-1 One-Channel Controller ...................................................................................227
APPENDIX E : HYDRAN 201TI’S HISTORY FILE MESSAGES ........................................................ 231
APPENDIX F : DEFAULT VALUES OF PARAMETERS ....................................................................235
APPENDIX G : UNIT CONVERSIONS.............................................................................................. 238
G.1 Converting Current to Voltage .......................................................................................................238
G.2 Analog Outputs –Converting ppm to mA (or Vice Versa).....................................................238
APPENDIX H : USB PORT DRIVER INSTALLATION ...................................................................... 239
APPENDIX I : EXTRACTING AN OIL SAMPLE ................................................................................ 240
APPENDIX J : MODBUS PROTOCOL DOCUMENTATION............................................................242
J.1 Introduction to the Modbus for the Hydran 201Ti ..................................................................242
J.2 Modbus RTU Protocol ........................................................................................................................242
J.3 Modbus PDU Description .................................................................................................................246
J.4 Hydran 201Ti Data Model ................................................................................................................252
J.5 Addresses Mapping............................................................................................................................256
APPENDIX K : GLOSSARY ...............................................................................................................261

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1PRELIMINARY INFORMATION
1.1 Safety Warnings in Six Languages
1.1.1 [EN] (In English) WARNINGS:
All procedures in this manual must be strictly adhered to.
Any deviation from these could cause irreversible damage to the transformer being
monitored and/or the Hydran 201i, and could lead to property damage, personal injury
and/or death.
Installation and maintenance of the Hydran 201imust be carried out by qualified
personnel only.
For a maximum distance of 15 m (50 ft) from the power source, use a 2.08 mm2 (14-
AWG) cable and a 15A overcurrent protection.
1.1.2 [FR] (In French) ATTENTION:
Toutes les procédures dans ce manuel doivent être observées rigoureusement.
Tout écart par rapport à celles-ci pourrait causer des dommages irréversibles au
transformateur surveillé et/ou au Hydran 201i, et pourrait entraîner des dommages à la
propriété, des blessures corporelles et/ou la mort.
L'installation et l'entretien du Hydran 201idoivent être effectués par du personnel
qualifié seulement.
Pour une distance maximale de 15 m (50 pi) de la source d'alimentation, utiliser un
câble de 2,08 mm2 (14-AWG) et une protection maximale de 15A contre les surintensités.
1.1.3 [ES] (In Spanish) ADVERTENCIA:
Se debe cumplir estrictamente con todos los procedimientos señalados en este
manual.
Cualquier desviación al respecto puede causar daños irreparables al transformador
que está bajo monitoreo y/o al Hydran 201i, asimismo puede ser causa de daños
materiales, lesiones corporales y/o muerte.
La instalación y mantenimiento del equipo Hydran 201ise reserva únicamente al
personal perfectamente cualificado.
Para una distancia máxima de 15 m (50 pies) de la fuente de alimentación, utilice un
cable de 2,08 mm2 (14-AWG) y una protección máxima 15A contra las sobrecargas de
corriente.

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1.1.4 [DE] (In German) WARNUNG:
Alle Abläufe in diesem Handbuch müssen strengstens befolgt werden.
Jede Abweichung davon könnte dem zu überwachenden Transformator und/oder
dem Hydran 201iunwiderrufliche Schäden zufügen, und könnte zu Sachschaden,
Personenverletzung und/oder Tod führen.
Installation und Wartung des Hydran 201idürfen daher nur von qualifiziertem
Personal durchgeführt werden.
Für eine maximale Entfernung von 15 m von der Spannungsquelle, verwenden Sie
ein 2,08 mm2 Kabel (14 AWG) und einen 15A Maximalüberstromschutz.
1.1.5 [IT] (in Italian) ATTENZIONE:
•Tutte le procedure del presente manuale dovranno essere eseguite in totale
conformità.
•Qualsiasi deviazione dallo stesso manuale potrebbe causare danni irreversibili al
trasformatore sotto monitoraggio e/o all’ Hydran 201i, e potrebbe causare danni alla
proprietà, lesioni personali e/o alla morte.
•L’installazione e la manutenzione del Hydran 201idevono essere eseguite solo ed
esclusivamente da personale qualificato.
•A una distanza massima di 15 m dalla fonte di energia usare un cavo 2.08 mm2
(14-AWG) e una protezione massima 15A di sovracorrente.
1.1.6 [SV] (In Swedish) VARNING:
Alla procedurer i manualen måste följas noggrant.
Varje avvikelse från dessa procedurer kan orsaka oåterkalleliga skador på den
övervakade transformatorn och/eller på Hydran 201isamt leda till egendomsförlust,
personskada och/eller livsfara.
Installation och underhåll av Hydran 201imåste utföras av behörig personal.
För ett maximalt avstånd på 15 m från kraftuttaget, använd 2,08 mm2kabel (14-
AWG) och ett överströmsskydd på maximalt 15 A.

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1.2 Safety Symbols Description
Description of safety symbols used on the Hydran 201idevice:
Refer to the Instruction Manual to prevent injury or damage to
equipment.
Hazardous voltages may be present.
Protective earth connection.
Hot surfaces may be present.
Description of safety messages used in this Instruction Manual:
A procedure, practice, or condition that could cause equipment
damage or permanent loss of data, if not adhered to.
A procedure, practice, or condition that could cause bodily
injury or death, if not adhered to.
1.3 Preface
This manual provides a complete reference for the Hydran 201iSystem, which is a
unique, continuous, on-line monitor of combustible gases and moisture in dielectric oils.
The information in this manual may be used by:
oPurchase or Specifications personnel
oInstallation planner
oOperator
oCommissioning manager
oPerson responsible for collecting the readings
CAUTION
WARNING

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oMaintenance technician
oTroubleshooting technician
oField Service and/or Customer Service personnel
•If the equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment
may be impaired.
•All procedures in this manual must be strictly adhered to.
Any deviation from these may cause irreversible damage to
the transformer being monitored and/or the Hydran 201i
System and may lead to property damage, personal injury
and/or death.
•Installation and maintenance of the Hydran 201i System
must be carried out by qualified personnel only.
This manual is not a tutorial on combustible gases or water in dielectric oil. It is
assumed that the reader is already familiar with these subjects
This manual applies to the Hydran 201Ti, Hydran 201i System and to the Hydran
201R Model i. In this manual, the designation “Hydran 201i System” also applies to the
Hydran 201R Model i and to any other combination of Hydran 201i components. The
components of the Hydran 201i System are described in Section 2.2.
This Hydran 201i System Instruction Manual is included in PDF format in the folder
English/Manuals of the Hydran 201i System installation CD, along with the Hydran 201i
System Installation Guide and the Hydran Host Software Manual. A hard copy of all those
manuals can be purchased from General Electric.
WARNING

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1.4 Standard General Electric Warranty
The products covered by this manual and manufactured by General Electric
(“Products”) are warranted to be free from defects in material, workmanship and title at
the time of delivery. Any components of a Product or other products manufactured by
persons other than General Electric carry only the warranty provided by the
manufacturers thereof and General Electric gives no warranty on behalf of the
manufacturers of such products.
General Electric warrants the Products until one (1) year from first use or eighteen
months (18) months from delivery, whichever occurs first, except that software is
warranted for ninety (90) days from delivery.
General Electric represents and warrants that any software and firmware covered by
this manual is free from functional deficiencies. If any functional deficiencies are
discovered and are reported to General Electric within the Warranty Period, General
Electric agrees to use due diligence to correct such deficiencies within 30 days after
receipt of such notification. Upon receiving such notice, General Electric may lend
telephone support or patches. If the reported deficiencies cannot be eliminated within
30 days, the Buyer may request, and General Electric shall then furnish, monthly status
reports to the Buyer regarding the progress of General Electric’s efforts to correct such
functional deficiencies.
If Products covered by this manual do not meet the above warranties during the
applicable Warranty Period, the Buyer shall promptly notify General Electric in writing
but not later than 30 days and make the Products available promptly for correction.
General Electric shall thereupon correct any defect by, at its option, repairing the
defective Products or making available necessary replacement parts.
Any failure which is the basis for a warranty claim shall not be cause for extension of
the duration of the applicable Warranty Period. General Electric shall not be responsible
for removal or replacement of systems, structures or other parts of the Buyer’s facility. If
a defect in Products or part thereof cannot be corrected by General Electric’s reasonable
efforts, the parties shall negotiate an equitable adjustment in price with respect to such
Products or part thereof. All decontamination work necessary for the correction of
defects shall be performed by the Buyer at the Buyer’s expense. The condition of any
tests shall be mutually agreed upon and General Electric shall be notified of and may be
represented at all tests that may be made.
General Electric does not warrant Products or any repaired or replacement parts
against normal wear and tear, including that due to environment or operation, including
excessive operation at peak capability, frequent starting, type of fuel, detrimental air
inlet conditions, or erosion, corrosion or material deposits from fluids, or which have
been involved in an accident. The warranties and remedies set forth herein are further
conditioned upon:
•Proper storage, installation, operation and maintenance of the Buyer’s equipment
and conformance with the instruction manuals (including revisions thereto) provided by
General Electric and/or its subcontractors, as applicable.
•Repair or modification pursuant to General Electric’s instructions or approval.

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The Buyer shall keep proper records of operation and maintenance during the
applicable Warranty Period. These records shall be kept in the form of log sheets and
copies shall be submitted to General Electric upon its request in connection with a
warranty claim by the Buyer. General Electric does not warrant any products or services
of others designated by the Buyer where such products or services are not normally
supplied by General Electric.
The preceding paragraphs set forth the exclusive remedies for all claims based on
failure of or defect in Products covered by this manual, whether the failure or defect
arises before or during the applicable Warranty Period and whether a claim, however
instituted, is based on contract, indemnity, warranty, tort (including negligence) or civil
liability, strict liability or otherwise. The foregoing warranties are exclusive and are in lieu
of all other warranties and guarantees whether written, oral, implied or statutory. NO
IMPLIED STATUTORY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE SHALL APPLY.

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2INTRODUCTION
This Chapter is an introduction to the Hydran 201iSystem. A description of the various
components of the system is also provided.
2.1 The Hydran 201i System
The Hydran 201iSystem is a continuous, on-line, intelligent dissolved gas monitoring
system. Its uncompromising accuracy and reliability, and its features are key to its
worldwide acceptance as a true transformer fault prevention device:
•A direct and continuous combustible gas-in-oil digital reading (0–2,000 ppm H2).
•An isolated, analog 4–20 mA output.
•Two adjustable gas alarm set points.
•A System Fail alarm.
•A sensor test feature.
•A very wide temperature range for all-weather outdoor operation.
•An extremely high immunity to electrical surge, radio-frequency interference and
electrostatic discharge.
Besides these essential characteristics, the Hydran 201Tiintelligent dissolved-gas
monitor enjoys the benefits of full digital processing and is equipped with the following
additional high-value features:
•Adjustable hourly and daily gas trend computation (ppm change during the target
period) with alarming.
•History logging of data and events with date and time stamping.
•Serial communications with a host computer (USB or RS-485).
•Networking capabilities (up to 128 units) and modem control.
•Self-test on power-up.
•All-software calibration.
•Remote or local configuration and program upgrading.
•Hydran Host computer software available from General Electric.
•Full stand-alone capabilities when the host computer is not needed.
•Sensor self-test and sensor status.
The Hydran 201iSystem consists of an Intelligent Transmitter, named the Hydran
201Ti, and a family of Controllers, collectively named the Hydran 201CiControllers.
•When the Hydran 201Ti(Intelligent Transmitter) is combined with the Hydran
201Ci-1 (One-Channel Controller), it is called a Hydran 201R Model i(Incipient
Fault Monitor).
•A Hydran 201Tibeing used alone or with other Hydran 201CiControllers is named
a Hydran 201iSystem Incipient Fault Monitor.
Both the Hydran 201R Model iand the Hydran 201iSystem Incipient Fault Monitors
can be networked. The network can be tied to a Supervisory Control and Data

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Acquisition (SCADA) computer with a single RS-232 line or USB link, either locally at the
substation or remotely through a telephone line and modem.
2.2 Components of the Hydran 201i System
2.2.1 Hydran 201Ti Intelligent Transmitter
The Hydran 201TiIntelligent Transmitter (Figure 2-1 below) is the foundation upon
which the Hydran 201iSystem is built. It consists of a small cylindrical enclosure which
attaches directly to a transformer valve using a brass adaptor. This enclosure contains a
standard Hydran sensor, a thermal conditioning system and a microprocessor-based
intelligent electronic transmitter.
Figure 2-1: Hydran 201Ti Intelligent Transmitter
Terminal blocks are provided for easy connection of: AC power; alarm contacts (Gas
High, Gas High- High and System Fail); supervisory link; and one isolated, analog 4–20
mA output. A USB type B connector is provided for local computer interface.