MR TRAFOGUARD ISM User manual

Monitoring System
TRAFOGUARD® ISM®
Operating Instructions
5163667/00 EN

© All rights reserved by Maschinenfabrik Reinhausen
Dissemination and reproduction of this document and use and disclosure of its content are strictly prohibited
unless expressly permitted.
Infringements will result in liability for compensation. All rights reserved in the event of the granting of patents,
utility models or designs.
The product may have been altered since this document was published.
We reserve the right to change the technical data, design and scope of supply.
Generally the information provided and agreements made when processing the individual quotations and orders
are binding.
The original operating instructions were written in German.

Table of contents
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Table of contents
1Introduction......................................................................................................................... 9
1.1 Manufacturer....................................................................................................................................... 9
1.2 Completeness...................................................................................................................................... 9
1.3 Safekeeping......................................................................................................................................... 9
1.4 Notation conventions........................................................................................................................... 9
1.4.1 Hazard communication system............................................................................................................................. 9
1.4.2 Information system.............................................................................................................................................. 11
1.4.3 Instruction system............................................................................................................................................... 11
1.4.4 Typographic conventions.................................................................................................................................... 12
2Safety................................................................................................................................. 13
2.1 Appropriate use................................................................................................................................. 13
2.2 Fundamental Safety Instructions....................................................................................................... 13
2.3 Personnel qualification...................................................................................................................... 15
2.4 Personal protective equipment.......................................................................................................... 16
3Product description.......................................................................................................... 18
3.1 Scope of delivery............................................................................................................................... 18
3.2 Function description.......................................................................................................................... 18
3.3 Performance features........................................................................................................................ 19
3.4 Design............................................................................................................................................... 20
3.4.1 Power supply....................................................................................................................................................... 21
3.4.2 Power supply....................................................................................................................................................... 22
3.4.3 Central processing unit........................................................................................................................................ 22
3.4.4 Voltage measurement and current measurement............................................................................................... 23
3.4.5 Digital inputs and outputs.................................................................................................................................... 23
3.4.6 Analog inputs and outputs................................................................................................................................... 24
3.4.7 Media converter................................................................................................................................................... 25
3.4.8 Media converter with managed switch................................................................................................................ 26
3.5 Operating concept............................................................................................................................. 26
4Mounting............................................................................................................................ 30
4.1 Preparation........................................................................................................................................ 30
4.2 Electromagnetic compatibility............................................................................................................ 30
4.2.1 Wiring requirement of installation site ................................................................................................................ 31

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4.2.2 Wiring requirement of operating site .................................................................................................................. 31
4.2.3 Wiring requirement in control cabinet.................................................................................................................. 32
4.2.4 Information about shielding the CAN bus............................................................................................................ 33
4.3 Minimum distances............................................................................................................................ 34
4.4 Installing the 19-inch plug-in housing................................................................................................ 34
4.5 Installing the individual components on a cap rail............................................................................. 37
4.5.1 Fastening the cap rail.......................................................................................................................................... 37
4.5.2 Installing the bus rail on the cap rail.................................................................................................................... 39
4.5.3 Installing the assembly at a distance on the cap rail........................................................................................... 39
4.6 Connecting device............................................................................................................................. 40
4.6.1 Cable recommendation....................................................................................................................................... 41
4.6.2 Information about connecting serial interfaces RS232 and RS485..................................................................... 42
4.6.3 Information about laying fiber-optic cable............................................................................................................ 45
4.6.4 Mounting terminating resistor of CAN bus........................................................................................................... 45
4.6.5 Connecting cables to the system periphery........................................................................................................ 45
4.6.6 Wiring the CPU I assembly................................................................................................................................. 46
4.6.7 Wiring the UI assembly....................................................................................................................................... 49
4.6.8 Wiring the AIO assembly..................................................................................................................................... 51
4.6.9 Wiring the DIO assembly..................................................................................................................................... 56
4.6.10 Wiring the MC 2-2/SW3-3 assembly................................................................................................................... 58
4.6.11 Wiring the G1 (PULS) assembly......................................................................................................................... 60
4.6.12 Connecting the power supply.............................................................................................................................. 62
5Commissioning................................................................................................................. 64
5.1 Performing tests................................................................................................................................ 64
5.1.1 Ground test.......................................................................................................................................................... 64
5.1.2 Performing a high voltage test............................................................................................................................. 66
5.2 Setting the language.......................................................................................................................... 68
5.3 Setting date and time......................................................................................................................... 69
5.4 Commissioning wizard....................................................................................................................... 70
5.5 Checking measured values and status of digital inputs and outputs................................................. 71
6Functions and settings..................................................................................................... 72
6.1 General.............................................................................................................................................. 72
6.1.1 Activating/deactivating automatic launch of commissioning wizard.................................................................... 73
6.1.2 Setting measured value display.......................................................................................................................... 73
6.1.3 Transformer name............................................................................................................................................... 73

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6.1.4 Visualization........................................................................................................................................................ 73
6.2 Control (optional)............................................................................................................................... 77
6.2.1 Setting the desired value..................................................................................................................................... 77
6.2.2 Bandwidth............................................................................................................................................................ 90
6.2.3 Delay time T1...................................................................................................................................................... 91
6.2.4 Delay time T2...................................................................................................................................................... 93
6.3 Transformer data............................................................................................................................... 96
6.3.1 Setting the primary transformer voltage.............................................................................................................. 96
6.3.2 Setting the secondary transformer voltage.......................................................................................................... 96
6.3.3 Setting primary transformer current..................................................................................................................... 96
6.3.4 Setting the secondary transformer current.......................................................................................................... 97
6.3.5 Setting circuit for current transformer/voltage transformer and phase angle correction...................................... 97
6.4 Measurement................................................................................................................................... 104
6.4.1 Setting UI measuring channels......................................................................................................................... 104
6.4.2 Control variable................................................................................................................................................. 105
6.4.3 Regulation mode............................................................................................................................................... 105
6.5 Control of the motor-drive unit (optional)......................................................................................... 105
6.5.1 Setting the switching pulse for controlling the motor-drive unit......................................................................... 106
6.5.2 Setting motor runtime monitoring...................................................................................................................... 107
6.5.3 Setting the switching direction........................................................................................................................... 107
6.6 Parallel operation (optional)............................................................................................................. 108
6.6.1 Activating parallel operation.............................................................................................................................. 109
6.6.2 Selecting parallel operation method.................................................................................................................. 109
6.6.3 Assigning a CAN bus address........................................................................................................................... 112
6.6.4 Setting behavior if no communication present.................................................................................................. 113
6.6.5 Setting delay time for parallel operation error messages.................................................................................. 113
6.6.6 TAPCON® 2xx retrofit....................................................................................................................................... 113
6.7 Limit values...................................................................................................................................... 114
6.7.1 Voltage monitoring............................................................................................................................................ 117
6.7.2 Current monitoring............................................................................................................................................. 118
6.7.3 Power monitoring.............................................................................................................................................. 119
6.7.4 Bandwidth monitoring........................................................................................................................................ 119
6.7.5 Temperature monitoring.................................................................................................................................... 121
6.7.6 Tx statistics monitoring...................................................................................................................................... 122
6.7.7 DGA monitoring................................................................................................................................................. 123
6.7.8 Tap position monitoring..................................................................................................................................... 124

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6.8 Hot-spot calculation (optional)......................................................................................................... 124
6.9 Setting calculation of transformer's loss of life (optional)................................................................. 125
6.10 Cooling system control (optional).................................................................................................... 126
6.10.1 Configuring cooling stages................................................................................................................................ 127
6.10.2 Configuring load-dependent mode.................................................................................................................... 130
6.10.3 Configuring periodic mode................................................................................................................................ 131
6.10.4 Configuring alternating mode............................................................................................................................ 132
6.10.5 Displaying status of cooling stages................................................................................................................... 133
6.11 Displaying protective device status (optional)................................................................................. 134
6.12 Displaying tap-change operation statistics (optional)...................................................................... 135
6.13 DGA measured value trend............................................................................................................. 136
6.14 Displaying temperature curve (optional).......................................................................................... 137
6.15 Changing tap position designation (optional).................................................................................. 138
6.16 Displaying information about contact wear (only OILTAP®)........................................................... 139
6.17 Configuring analog inputs and outputs (optional)............................................................................ 139
6.18 Name plate (optional)...................................................................................................................... 141
6.18.1 Enter the name plate data................................................................................................................................. 142
6.18.2 Displaying the name plate................................................................................................................................. 142
6.19 Maintenance (optional).................................................................................................................... 143
6.19.1 Setting operator interval for OLTC maintenance............................................................................................... 144
6.19.2 Setting operator interval for transformer maintenance...................................................................................... 145
6.19.3 Undertaking and confirming maintenance......................................................................................................... 146
6.19.4 Displaying maintenance overview..................................................................................................................... 147
6.20 Event management......................................................................................................................... 148
6.20.1 Displaying and acknowledging events.............................................................................................................. 148
6.20.2 Configuring events............................................................................................................................................ 148
6.20.3 Displaying event memory.................................................................................................................................. 150
6.21 Measured values............................................................................................................................. 151
6.21.1 Displaying current measured values................................................................................................................. 152
6.21.2 Displaying measured value recorder (optional)................................................................................................. 152
6.22 SCADA............................................................................................................................................ 156
6.22.1 Configuring IEC 61850 (optional)...................................................................................................................... 156
6.22.2 Configuring IEC 60870-5-101 (optional)............................................................................................................ 159
6.22.3 Configuring IEC 60870-5-103 (optional)............................................................................................................ 162
6.22.4 Configuring IEC 60870-5-104 (optional)............................................................................................................ 164
6.22.5 Configuring Modbus (optional).......................................................................................................................... 166

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6.22.6 Configuring DNP3 (optional)............................................................................................................................. 169
6.23 Time synchronization....................................................................................................................... 173
6.23.1 Activating time synchronization using SNTP..................................................................................................... 173
6.23.2 Entering the time server address...................................................................................................................... 174
6.23.3 Setting the time zone......................................................................................................................................... 175
6.23.4 Setting synchronization interval......................................................................................................................... 175
6.23.5 Reference time.................................................................................................................................................. 175
6.24 User administration.......................................................................................................................... 176
6.24.1 User roles.......................................................................................................................................................... 176
6.24.2 Changing password........................................................................................................................................... 177
6.24.3 Creating, editing and deleting users.................................................................................................................. 178
6.24.4 Setting access rights to parameters and events............................................................................................... 180
6.25 Information about device................................................................................................................. 181
6.25.1 Hardware........................................................................................................................................................... 181
6.25.2 Software............................................................................................................................................................ 182
6.25.3 Parallel operation.............................................................................................................................................. 182
6.26 Import/export manager.................................................................................................................... 183
6.26.1 Exporting data................................................................................................................................................... 183
6.26.2 Importing data................................................................................................................................................... 184
6.27 Linking signals and events.............................................................................................................. 185
6.27.1 Linking functions................................................................................................................................................ 186
6.27.2 Linking digital outputs and control system messages....................................................................................... 187
7Fault elimination.............................................................................................................. 190
7.1 General faults.................................................................................................................................. 190
7.2 Human-machine interface............................................................................................................... 190
7.3 Other faults...................................................................................................................................... 190
8Uninstallation.................................................................................................................. 192
8.1 Uninstalling the CPU I assembly..................................................................................................... 193
8.2 Uninstalling the UI 1/UI 3 assembly................................................................................................. 196
8.3 Uninstalling the AIO 2/AIO 4 assembly........................................................................................... 197
8.4 Uninstalling the DIO 28-15/DIO 42-20 assembly............................................................................. 199
8.5 Uninstalling the MC 2-2/SW 3-3 assembly...................................................................................... 201
8.6 Uninstalling the QS3.241 assembly................................................................................................. 203
8.7 Uninstalling the bus rail................................................................................................................... 204

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9Disposal........................................................................................................................... 205
10 Technical data................................................................................................................. 206
10.1 Voltage supply (G1 PULS QS3.241)............................................................................................... 206
10.2 Voltage supply................................................................................................................................. 206
10.3 Voltage measurement and current measurement........................................................................... 207
10.4 Digital inputs and outputs................................................................................................................ 208
10.5 Analog inputs and outputs............................................................................................................... 210
10.6 Central processing unit.................................................................................................................... 211
10.7 System networking.......................................................................................................................... 213
10.8 Ambient conditions.......................................................................................................................... 214
10.9 Standards and directives................................................................................................................. 215
11 Appendix.......................................................................................................................... 217
11.1 Check list for commissioning........................................................................................................... 217
Glossary........................................................................................................................... 218
List of key words............................................................................................................. 219

1 Introduction
Maschinenfabrik Reinhausen GmbH 2016 95163667/00 EN TRAFOGUARD® ISM®
Introduction
This technical file contains detailed descriptions on the safe and proper in-
stallation, connection, commissioning and monitoring of the product.
It also includes safety instructions and general information about the prod-
uct.
This technical file is intended solely for specially trained and authorized per-
sonnel.
Manufacturer
The product is manufactured by:
Maschinenfabrik Reinhausen GmbH
Falkensteinstraße 8
93059 Regensburg, Germany
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
Further information on the product and copies of this technical file are avail-
able from this address if required.
Completeness
This technical file is incomplete without the further applicable documentation.
The following documents apply to this product:
▪ Operating instructions
▪ Connection diagrams
Safekeeping
Keep this technical file and all supporting documents ready at hand and ac-
cessible for future use at all times.
Notation conventions
This section contains an overview of the symbols and textual emphasis
used.
Hazard communication system
Warnings in this technical file are displayed as follows.
1
1.1
1.2
1.3
1.4
1.4.1

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Warning relating to section
Warnings relating to sections refer to entire chapters or sections, sub-sec-
tions or several paragraphs within this technical file. Warnings relating to
sections use the following format:
WARNING Type and source of danger
Consequences
► Action
► Action
Embedded warning information
Embedded warnings refer to a particular part within a section. These warn-
ings apply to smaller units of information than the warnings relating to sec-
tions. Embedded warnings use the following format:
DANGER! Instruction for avoiding a dangerous situation.
Signal words and pictograms
The following signal words are used:
Signal
word
Meaning
DANGER Indicates a hazardous situation which, if not avoided, will
result in death or serious injury.
WARNING Indicates a hazardous situation which, if not avoided, could
result in death or serious injury.
CAUTION Indicates a hazardous situation which, if not avoided, could
result in injury.
NOTICE Indicates measures to be taken to prevent damage to
property.
Table 1: Signal words in warning notices
Pictograms warn of dangers:
Pictogram Meaning
Warning of a danger point
Warning of dangerous electrical voltage
1.4.1.1
1.4.1.2
1.4.1.3

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Pictogram Meaning
Warning of combustible substances
Warning of danger of tipping
Table 2: Pictograms used in warning notices
Information system
Information is designed to simplify and improve understanding of particular
procedures. In this technical file it is laid out as follows:
Important information.
Instruction system
This technical file contains single-step and multi-step instructions.
Single-step instructions
Instructions which consist of only a single process step are structured as fol-
lows:
Aim of action
üRequirements (optional).
► Step 1 of 1.
ðResult of step (optional).
ðResult of action (optional).
Multi-step instructions
Instructions which consist of several process steps are structured as follows:
Aim of action
üRequirements (optional).
1. Step 1.
ðResult of step (optional).
1.4.2
1.4.3

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2. Step 2.
ðResult of step (optional).
ðResult of action (optional).
Typographic conventions
The following typographic conventions are used in this technical file:
Typographic convention Purpose Example
UPPERCASE Operating controls, switches ON/OFF
[Brackets] PC keyboard [Ctrl] + [Alt]
Bold Software operating controls Press Continue button
…>…>… Menu paths Parameter > Control parameter
Italics System messages, error mes-
sages, signals
Function monitoring alarm trig-
gered
[► Number of pages]. Cross reference [► 41].
Table 3: Typographic conventions
1.4.4

2 Safety
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Safety
This technical file contains detailed descriptions on the safe and proper in-
stallation, connection, commissioning, operation, and monitoring of the prod-
uct.
▪ Read this technical file through carefully to familiarize yourself with the
product.
▪ This technical file is part of the product.
▪ Read and observe the safety instructions provided in this chapter in par-
ticular.
▪ Observe the warnings in this technical file in order to avoid function-re-
lated dangers.
▪ The product is manufactured according to the state of the art. Risks to
life and limb of the user or impairment of the product and other material
assets may occur during use due to function-related dangers despite
this.
Appropriate use
The TRAFOGUARD® ISM® is used to record and monitor a transformer's
different measured values. The product is designed solely for use in electri-
cal energy systems and facilities.
If used as intended and in compliance with the requirements and conditions
specified in this technical file as well as with the warnings in this technical file
and attached to the product, then the product does not present any danger
to people, property or the environment. This applies throughout the product's
entire life, from delivery to installation and operation through to disassembly
and disposal.
The following is considered appropriate use:
▪ Operate the product in accordance with this technical file, the agreed
delivery conditions and technical data.
▪ Ensure that all necessary work is performed only by qualified personnel.
▪ Use the equipment and special tools supplied only for the intended pur-
pose and in accordance with the specifications of this technical file.
▪ Operate the product only in industrial areas. Observe the notes in this
technical file regarding electromagnetic compatibility and the technical
data.
Fundamental Safety Instructions
To prevent accidents, disruptions, and damage, as well as unacceptable ad-
verse effects on the environment, those responsible for transport, installa-
tion, operation, maintenance, and disposal of the product or parts of the
product must ensure the following:
2
2.1
2.2

2 Safety
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Personal protective equipment
Loosely worn or unsuitable clothing increases the danger of becoming trap-
ped or caught up in rotating parts and the danger of getting caught on pro-
truding parts. This increases the danger to life and limb.
▪ All necessary devices and personal protective equipment required for
the specific task, such as a hard hat, safety footwear, etc. must be worn.
Observe the section "Personal protective equipment" [► 16].
▪ Never wear damaged personal protective equipment.
▪ Never wear rings, necklaces or other jewelry.
▪ If you have long hair, wear a hairnet.
Work area
Untidy and poorly lit work areas can lead to accidents.
▪ Keep the work area clean and tidy.
▪ Make sure that the work area is well lit.
▪ Observe the applicable laws for accident prevention in the relevant
country.
Working during operation
You must only operate the product when it is in a sound operational condi-
tion. Otherwise it poses a danger to life and limb.
▪ Regularly check the operational reliability of safety equipment.
▪ Comply with the maintenance work and maintenance intervals descri-
bed in this technical file.
Explosion protection
Highly flammable or explosive gases, vapors and dusts can cause serious
explosions and fire.
▪ Do not install or operate the product in areas where a risk of explosion is
present.
Safety markings
Warning signs and safety information plates are safety markings on the
product. They are an important aspect of the safety concept.
▪ Observe all safety markings on the product.
▪ Make sure all safety markings on the product remain intact and legible.
▪ Replace safety markings that are damaged or missing.

2 Safety
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Ambient conditions
To ensure reliable and safe operation, the product must only be operated
under the ambient conditions specified in the technical data.
▪ Observe the specified operating conditions and requirements for the in-
stallation location.
Modifications and conversions
Unauthorized or inappropriate changes to the product may lead to personal
injury, material damage and operational faults.
▪ Only modify product following consultation with Maschinenfabrik Rein-
hausen GmbH.
Spare parts
Spare parts not approved by Maschinenfabrik Reinhausen GmbH may
cause physical injury and damage the product.
▪ Only use spare parts approved by the manufacturer.
▪ Contact Maschinenfabrik Reinhausen GmbH.
Personnel qualification
The person responsible for assembly, commissioning, operation, mainte-
nance and inspection must ensure that the personnel are sufficiently quali-
fied.
Electrically skilled person
The electrically skilled person has a technical qualification and therefore has
the required knowledge and experience, and is also conversant with the ap-
plicable standards and regulations. The electrically skilled person is also pro-
ficient in the following:
▪ Can identify potential dangers independently and is able to avoid them.
▪ Is able to perform work on electrical systems.
▪ Is specially trained for the working environment in which (s)he works.
▪ Must satisfy the requirements of the applicable statutory regulations for
accident prevention.
Electrically trained persons
An electrically trained person receives instruction and guidance from an
electrically skilled person in relation to the tasks undertaken and the poten-
tial dangers in the event of inappropriate handling as well as the protective
devices and safety measures. The electrically trained person works exclu-
sively under the guidance and supervision of an electrically skilled person.
2.3

2 Safety
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Operator
The operator uses and operates the product in line with this technical file.
The operating company provides the operator with instruction and training
on the specific tasks and the associated potential dangers arising from im-
proper handling.
Technical Service
We strongly recommend having maintenance, repairs and retrofitting carried
out by our Technical Service department. This ensures that all work will be
performed correctly. If maintenance is not carried out by our Technical Serv-
ice department, please ensure that the personnel who carry out the mainte-
nance are trained and authorized by Maschinenfabrik Reinhausen GmbH to
carry out the work.
Authorized personnel
Authorized personnel are trained by Maschinenfabrik Reinhausen GmbH to
carry out special maintenance.
Personal protective equipment
Personal protective equipment must be worn during work to minimize risks to
health.
▪ Always wear the personal protective equipment required for the job at
hand.
▪ Never wear damaged personal protective equipment.
▪ Observe information about personal protective equipment provided in
the work area.
Personal protective equipment to be worn at all times
Protective clothing
Close-fitting work clothing with a low tear-
ing strength, with tight sleeves and with no
protruding parts. It mainly serves to pro-
tect the wearer against being caught by
moving machine parts.
Safety shoes
To protect against falling heavy objects
and slipping on slippery surfaces.
2.4

2 Safety
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Special personal protective equipment for particular environments
Safety glasses
To protect the eyes from flying parts and
splashing liquids.
Visor
To protect the face from flying parts and
splashing liquids or other dangerous sub-
stances.
Hard hat
To protect from falling and flying parts and
materials.
Hearing protection
To protect from hearing damage.
Protective gloves
To protect from mechanical, thermal, and
electrical hazards.

3 Product description
Maschinenfabrik Reinhausen GmbH 201618 5163667/00 ENTRAFOGUARD® ISM®
Product description
This chapter contains an overview of the design and function of the product.
Scope of delivery
The following items are included in the delivery:
▪ TRAFOGUARD® ISM®
▪ Terminating resistor for CAN bus (optional)
▪ Technical files
▪ Additional nameplate
Please note the following:
▪ Check the shipment for completeness on the basis of the shipping docu-
ments.
▪ Store the parts in a dry place until installation.
Function description
The device is used to record the measured values and status data of a pow-
er transformer and an on-load tap-changer and to make them available us-
ing a web-based visualization. In addition to this, the parameters can be
changed via the visualization. You can set the required parameters for a reg-
ulation function depending on device configuration. The device can be incor-
porated into a control system (SCADA).
ISM®
Signals
SCADA
Visualization
via web browser
Figure 1: Function description
3
3.1
3.2

3 Product description
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Performance features
Depending on your order, the device is equipped with the following optional
function packages:
▪ Basic monitoring
– Voltage, current, frequency
– Active power, reactive power, apparent power, power factor
– Temperature monitoring (ambient temperature, temperature of top-
oil, temperature of bottom oil (optional), calculation of hot-spot tem-
perature in accordance with IEC 60076-7 or IEEE C57.91)
– Optional: Transformer oil level
– Loss-of-life and relative aging rate
– Status of the motor-drive unit (motor protective switch, motor is run-
ning)
– Tap position display
– Optional: Status of protective devices (Buchholz relay, protective re-
lay, pressure relief device)
▪ On-load tap-changer monitoring
– Contact wear calculation (only for OILTAP® V, M, R, RM, MS, G)
– Maintenance interval calculation
– Oil carbonization (only for OILTAP® V, M, R)
– Monitoring of OLTC temperature (optional)
– Tap-change statistics of on-load tap-changer
– Optional: on-load tap-changer oil level
– Optional: oil filter unit
– Status of the motor-drive unit (motor protective switch, motor is run-
ning)
▪ Automatic voltage regulation AVR basic
– Measurement of voltage and current
– 1 desired value
– Voltage regulation with linear delay time T1
– Status of the motor-drive unit (motor protective switch, motor is run-
ning)
▪ Automatic voltage regulation AVR pro
– Measurement of voltage and current
– Desired value in accordance with order (1, 3 or 5 desired values,
TDSC, analog desired value specification, gradual desired value
specification, desired value using BCD)
– Automatic voltage regulation with linear or integral delay time T1
and with delay time T2
– Parallel operation
– Line drop compensation
3.3

3 Product description
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– Status of the motor-drive unit (motor protective switch, motor is run-
ning)
– Bandwidth monitoring
– Function monitoring
– Limit value monitoring (voltage, current, power, phase angle)
▪ Cooling system control
– 2, 4 or 6 cooling stages, can be individually parameterized
– Load-dependent mode (for early activation of cooling stages)
– Periodic mode (for regular activation of cooling stages)
– Alternating mode (for equal loading of similar cooling stages)
▪ Cooling stage monitoring (2, 4 or 6 cooling stages)
▪ DGA
– Up to 10 gases via analog input
– Relative moisture in oil via analog input
Design
Depending on the order, the device is either designed as a 19-inch plug-in
housing or as individual components for assembly on a cap rail. The device's
individual assemblies are described in the following section.
Figure 2: 19-inch plug-in housing
3.4