MR MSENSE DGA 2 User manual

Online Oil Analysis
MSENSE® DGA 2/3
Operating Instructions
BA4001150/10 EN

© All rights reserved by Messko GmbH
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
Messko GmbH 2020 3BA4001150/10 EN MSENSE® DGA 2/3
Table of contents
1 Introduction......................................................................................................................... 6
1.1 Manufacturer....................................................................................................................................... 6
1.2 Subject to change without notice ........................................................................................................ 6
1.3 Completeness..................................................................................................................................... 6
1.4 Safekeeping........................................................................................................................................ 6
1.5 Notation conventions .......................................................................................................................... 7
1.5.1 Hazard communication system .............................................................................................................................7
1.5.2 Information system................................................................................................................................................8
1.5.3 Instruction system .................................................................................................................................................8
1.5.4 Typographic conventions ......................................................................................................................................9
2 Safety................................................................................................................................. 10
2.1 Appropriate use ................................................................................................................................ 10
2.2 Fundamental safety instructions ....................................................................................................... 11
2.3 Personnel qualification...................................................................................................................... 12
2.4 Personal protective equipment ......................................................................................................... 13
3 IT security.......................................................................................................................... 15
4 Product description.......................................................................................................... 16
4.1 Scope of delivery .............................................................................................................................. 17
4.2 Function description.......................................................................................................................... 18
4.3 Design............................................................................................................................................... 19
4.4 Safety markings and nameplate ....................................................................................................... 20
5 Packaging, transport and storage .................................................................................. 21
5.1 Purpose ............................................................................................................................................ 21
5.2 Suitability, structure and production.................................................................................................. 21
5.3 Markings ........................................................................................................................................... 21
5.4 Transportation, receipt and handling of shipments........................................................................... 21
5.5 Storage of shipments........................................................................................................................ 23
5.6 Further transport ............................................................................................................................... 23
6 Installation......................................................................................................................... 24
6.1 Installation recommendation............................................................................................................. 24

Table of contents
Messko GmbH 20204BA4001150/10 ENMSENSE® DGA 2/3
6.2 Mounting the device.......................................................................................................................... 25
6.2.1 Preparing the transformer and ball valve ............................................................................................................25
6.2.2 Mounting the MSENSE® DGA 2/3......................................................................................................................30
6.3 Electrical connection......................................................................................................................... 39
6.3.1 Electromagnetic compatibility..............................................................................................................................40
6.3.2 Cable recommendation .......................................................................................................................................40
6.3.3 Routing and preparing the cables .......................................................................................................................40
6.3.4 Supply voltage and protective conductor ............................................................................................................41
6.3.5 Device grounding ................................................................................................................................................42
6.3.6 Analog outputs ....................................................................................................................................................42
6.3.7 Main switching contacts ......................................................................................................................................44
6.3.8 SCADA connection .............................................................................................................................................45
6.4 Ensuring offshore capability.............................................................................................................. 48
7 Commissioning................................................................................................................. 51
7.1 Service interface ............................................................................................................................... 51
7.2 Installing the MESSKO® MSET parameterization software ............................................................. 52
7.3 Commissioning in existing systems .................................................................................................. 53
7.4 Parameterization............................................................................................................................... 53
7.4.1 Settings for carbon monoxide (DGA 3 only), hydrogen and H2O concentrations in the oil ................................54
7.4.2 General settings ..................................................................................................................................................55
7.4.3 Modbus settings ..................................................................................................................................................56
8 Operation........................................................................................................................... 58
8.1 Operating the device with display ..................................................................................................... 59
8.1.1 General operation ...............................................................................................................................................60
8.1.2 Main screen / Operating display..........................................................................................................................61
8.1.3 Events .................................................................................................................................................................63
8.2 Operating the device without display ................................................................................................ 64
9 Fault elimination ............................................................................................................... 65
9.1 Messages regarding the safety switching contact ............................................................................ 65
9.2 Other faults ....................................................................................................................................... 66
9.3 Replace safety fuse .......................................................................................................................... 66
10 Maintenance...................................................................................................................... 68
10.1 Inspection ......................................................................................................................................... 68
10.2 Maintenance ..................................................................................................................................... 69

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Messko GmbH 2020 5BA4001150/10 EN MSENSE® DGA 2/3
10.3 Oil extraction..................................................................................................................................... 70
10.4 Device field calibration...................................................................................................................... 71
10.4.1 Taking a sample for field calibration....................................................................................................................71
10.4.2 Field calibration ...................................................................................................................................................73
10.4.3 Reading out the service database.......................................................................................................................78
10.5 Cleaning............................................................................................................................................ 79
11 Removal............................................................................................................................. 80
11.1 Removing the MSENSE® DGA 2/3.................................................................................................. 80
12 Disposal............................................................................................................................. 89
13 Technical data................................................................................................................... 90
14 Appendix ........................................................................................................................... 93
14.1 Device dimensions with 285 mm measuring pipe length.................................................................. 93
14.2 Device dimensions with 507 mm measuring pipe length.................................................................. 94
14.3 Connecting flange dimensions.......................................................................................................... 95
14.4 Electrical connection......................................................................................................................... 97
14.5 Data point table for Modbus RTU ..................................................................................................... 98
14.6 Spare parts list................................................................................................................................ 100

1 Introduction
Messko GmbH 20206BA4001150/10 ENMSENSE® DGA 2/3
1 Introduction
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
This technical document is intended solely for specially trained and autho-
rized personnel.
1.1 Manufacturer
The product is manufactured by:
Messko GmbH
Gewerbegebiet An den Drei Hasen
Messko-Platz 1
61440 Oberursel
Germany
Phone: [phone]
E-mail: [email protected]
Internet: www.reinhausen.com/messko
Further information on the product and copies of this technical document are
available from this address if required.
1.2 Subject to change without notice
The information contained in this technical file comprises the technical speci-
fications approved at the time of printing. Significant modifications will be in-
cluded in a new edition of the technical file.
The document number and version number of this technical file are shown in
the footer.
1.3 Completeness
This technical document is incomplete without the supporting documents.
The following documents apply to this product:
▪ MSENSE®DGA 2/3 operating instructions
▪ MESSKO®MSET parameterization software operating instructions
▪ Works certification
1.4 Safekeeping
Keep this technical file and all supporting documents ready at hand and ac-
cessible for future use at all times.

1 Introduction
Messko GmbH 2020 7BA4001150/10 EN MSENSE® DGA 2/3
1.5 Notation conventions
This section contains an overview of the symbols and textual emphasis
used.
1.5.1 Hazard communication system
Warnings in this technical file are displayed as follows.
1.5.1.1 Warning relating to section
Warnings relating to sections refer to entire chapters or sections, sub-sec-
tions or several paragraphs within this technical document. Warnings relat-
ing to sections have the following format:
WARNING Type of danger!
Source of the danger and its consequences.
► Action
► Action
1.5.1.2 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.
1.5.1.3 Signal words and pictograms
The following signal words are used:
Signal word Definition
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 minor or moderate injury.
NOTICE Indicates measures to be taken to prevent damage to property.
Table1: Signal words in warning notices

1 Introduction
Messko GmbH 20208BA4001150/10 ENMSENSE® DGA 2/3
Pictograms warn of dangers:
Pictogram Definition
Warning of a danger point
Warning of dangerous electrical voltage
Warning of combustible substances
Warning of a tipping hazard
Warning of a hot surface
Table2: Pictograms used in warning notices
1.5.2 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.
1.5.3 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:

1 Introduction
Messko GmbH 2020 9BA4001150/10 EN MSENSE® DGA 2/3
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).
2. Step 2.
ðResult of step (optional).
ðResult of action (optional).
1.5.4 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 messages,
signals
Function monitoring alarm triggered
[► Number of pages]. Cross reference [► 41].
Table3: Typographic conventions

2 Safety
Messko GmbH 202010 BA4001150/10 ENMSENSE® DGA 2/3
2 Safety
This technical document contains detailed descriptions on the safe and
proper installation, connection, commissioning and monitoring of the prod-
uct.
▪ Read this technical file through carefully to familiarize yourself with the
product.
▪ This technical file is a part of the product.
▪ Read and observe the safety instructions provided in this chapter in partic-
ular.
▪ Observe the warnings in this technical file in order to avoid function-re-
lated dangers.
▪ The product is manufactured on the basis of state-of-the-art technology.
Nevertheless, risks to life and limb for the user or impairment of the prod-
uct and other material assets may arise in the event of improper use.
2.1 Appropriate use
The device is designed solely for use in electrical energy systems and facili-
ties. It is designed to detect and report emerging, potentially harmful trends
in the monitored equipment (e.g. transformer) in good time by measuring the
concentration of gases and moisture in the equipment's insulating oil.
The device is not designed and is not suitable for detecting rapidly develop-
ing faults and therefore is not intended to protect the equipment from such
faults (e.g. through shutdown). For this, please use safety devices that have
been designed for this purpose.
If used as intended and in compliance with the requirements and conditions
specified in this technical document as well as the warning notices contained
in this technical document and attached to the product, the product does not
pose risk of personal injury or damage to property or the environment. This
applies throughout the entire service life of the product, from delivery, instal-
lation and operation to removal and disposal.
Intended use refers to the following:
▪ Operate the product in accordance with this technical document, the
agreed-upon delivery conditions and the technical data.
▪ Ensure that any necessary work is only performed by qualified personnel.
▪ Only use the equipment included in the delivery for the intended purpose
and in accordance with the specifications of this technical document.
▪ Observe the notices in this technical document regarding electromagnetic
compatibility and the technical data.

2 Safety
Messko GmbH 2020 11BA4001150/10 EN MSENSE® DGA 2/3
2.2 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 prod-
uct must ensure the following:
Personal protective equipment
Loosely worn or unsuitable clothing increases the danger of becoming
trapped or caught up in rotating parts and the danger of getting caught on
protruding parts. This results in 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. Ob-
serve the "Personal protective equipment" [►Section 2.4, Page 13] sec-
tion.
▪ 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 coun-
try.
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. Safety mark-
ings are depicted and described in the chapter "Product description".
▪ 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
Messko GmbH 202012 BA4001150/10 ENMSENSE® DGA 2/3
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 the product after consultation with Messko GmbH.
Spare parts
Spare parts not approved by Messko GmbH may cause physical injury and
damage the product.
▪ Only use spare parts approved by the manufacturer.
▪ Contact Messko GmbH.
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.
▪ Perform the inspection tasks described in this technical document regu-
larly.
2.3 Personnel qualification
The person responsible for assembly, commissioning, operation, mainte-
nance and inspection must ensure that personnel are sufficiently qualified.
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.

2 Safety
Messko GmbH 2020 13BA4001150/10 EN MSENSE® DGA 2/3
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.
Operator
The operator uses and operates the product in line with this technical docu-
ment. The operating company provides the operator with instruction and
training on the specific tasks and the associated potential dangers arising
from improper handling.
Technical Service
We strongly recommend having maintenance, repairs and retrofitting carried
out by our Technical Service department. This ensures that all work is per-
formed correctly. If maintenance is not carried out by our Technical Service
department, please ensure that the personnel who carry out the mainte-
nance are trained and authorized to do so by Maschinenfabrik Reinhausen
GmbH.
MR Service & Complaint
Maschinenfabrik Reinhausen GmbH
Falkensteinstrasse 8
93059 Regensburg
Germany
[email protected]
[email protected]
2.4 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.

2 Safety
Messko GmbH 202014 BA4001150/10 ENMSENSE® DGA 2/3
Personal protective equipment to be worn at all times
Protective clothing
Close-fitting work clothing with a low tearing
strength, with tight sleeves and with no protrud-
ing parts. It mainly serves to protect the wearer
against being caught by moving machine parts.
Safety shoes
To protect against falling heavy objects and slip-
ping on slippery surfaces.
Special personal protective equipment for particular environments
Safety glasses
To protect the eyes from flying parts and splash-
ing liquids.
Visor
To protect the face from flying parts and splash-
ing liquids or other dangerous substances.
Hard hat
To protect from falling and flying parts and mate-
rials.
Hearing protection
To protect from hearing damage.
Protective gloves
To protect from mechanical, thermal, and electri-
cal hazards.

3 IT security
Messko GmbH 2020 15BA4001150/10 EN MSENSE® DGA 2/3
3 IT security
Observe the following recommendations for the secure operation of the
product.
▪ Ensure that only authorized personnel have access to the device.
▪ Only use the device within an ESP (electronic security perimeter).
▪ Ensure that the device is only operated by trained personnel who are fa-
miliar with IT security.
▪ All protocol interfaces (ModbusRTU, ModbusTCP, DNP3TCP and
IEC61850-8-1MMS) only have read-access to the MSENSE®DGA 2/3.
Changing parameters or data through them is not possible.
▪ Access to the parameterization via the MESSKO®MSET parameteriza-
tion software can be protected through the use of passwords. Change the
passwords regularly.
Observe the information of access rights, user levels and password settings
in the MESSKO®MSET parameterization software operating instructions.

4 Product description
Messko GmbH 202016 BA4001150/10 ENMSENSE® DGA 2/3
4 Product description
The detection of dissolved gases in transformer oil is generally considered to
be the first indication of emerging faults in transformers. Several interna-
tional standards highlight the relevance of this examination method, includ-
ing the IEEE Std C57.104™-2008, IEC 60422, IEC 60567 and IEC 60599
standards.
The Dissolved Gas Analysis (DGA) method is fast, low-cost and possible
without disconnecting the transformer. The composition of the gases pro-
vides initial key information on fault events such as partial discharges, over-
heating, arcs and overload. This knowledge enables sound risk assessment
and the early initiation of measures for corrective action.
The standards listed above recommend that oil samples be taken at regular
intervals and that these be analyzed by a laboratory. In addition to a DGA,
further examinations are usually performed, such as the determination of the
moisture in oil, the dielectric strength and the turbidity.
Two gases in particular are to be considered during a DGA: hydrogen (H2)
and carbon monoxide (CO), since these are generated in virtually all occur-
ring faults. The occurrence of hydrogen is an indication of electrical faults in
the transformer, and carbon monoxide is generated during the decomposi-
tion of the paper insulation, which is caused by overheating.
Increased moisture in the oil significantly reduces the dielectric strength of
the insulating oil and also promotes paper decomposition; thus, monitoring
the water content (H2O) in the oil provides essential additional information
for the assessment of risks.
Continuous online monitoring of these two gases and the moisture enables
early detection of emerging, potentially harmful trends. As soon as defined
warning thresholds are exceeded, further analyses can be carried out and
countermeasures can be taken at an early stage. The costs for quickly im-
plemented measures are generally much lower than those implemented at a
later date, and especially after a failure of the transformer with the resulting
consequential costs.
Messko has developed the MSENSE® DGA 2/3 online DGA device for pre-
cisely this purpose. It continuously monitors the gas concentrations of hydro-
gen and carbon monoxide (MSENSE® DGA 3) as well as the moisture in oil,
and issues warning or alarm messages if defined gas or moisture concentra-
tions are exceeded or if the rates of increase are too high.
This chapter contains an overview of the design and function of the product.

4 Product description
Messko GmbH 2020 17BA4001150/10 EN MSENSE® DGA 2/3
The device is available in two device versions:
Measured variables
Hydrogen (H2) Carbon
monoxide
(CO)
Moisture
(H2O)
Oil tempera-
ture
MSENSE®
DGA 2
Yes No Yes Yes
MSENSE®
DGA 3
Yes Yes Yes Yes
MSENSE® DGA 2 for measuring and analyzing the fault gas hydrogen (H2)
present in the transformer oil, for detecting the oil moisture content and for
measuring the oil temperature.
MSENSE® DGA 3 for measuring and analyzing the fault gases hydrogen
(H2) and carbon monoxide (CO) present in the transformer oil, for detecting
the oil moisture content and for measuring the oil temperature.
The following options are available for both device versions:
▪ 2-line display and 3 operating keys
▪ Housing color RAL 7033 or 7038
▪ Various mounting flanges DN50 / DN80
▪ Two measuring pipe lengths for optimal mounting position
▪ Communication protocols DNP3TCP, 61850-8-1MMS or ModbusTCP
(all via MESSKO® protocol converter, available separately)
▪ Offshore version
4.1 Scope of delivery
Upon receipt, check the delivery for completeness.
▪ MSENSE® DGA 2 or 3
▪ Operating instructions and works certification
▪ Ball valve with mounting flange, safety chain and dummy plug
▪ Chain connector for safety chain
▪ USB storage medium with MESSKO®MSET parameterization software
▪ USB connection cable for connecting a computer to the device
▪ 5-pole plug for assembling an RS485 connection cable (Modbus RTU)
▪ Oil extraction adapter
▪ Two sets for extracting and shipping oil samples
▪ With the offshore model: One tube of grease

4 Product description
Messko GmbH 202018 BA4001150/10 ENMSENSE® DGA 2/3
4.2 Function description
The MSENSE® DGA 2/3 measuring head is positioned in the transformer in-
sulating oil. There is often a large distance between the measuring head and
the origin of the gases. It is therefore important for the early detection of
gases that the oil at the installation position is in motion, either due to natural
convection or due to artificially generated oil circulation. Observe the addi-
tional information regarding this in the chapter "Installation recommenda-
tions" [►Section 6.1, Page 24].
The gases dissolved in the oil are dissolved out via a capillary membrane in
the device measuring head. Sensors for hydrogen and carbon monoxide
(depending on the version) convert the concentrations of gas present into
electrical signals. A gold coating prevents unwanted chemical reactions that
could distort the measured results.
The device controller converts the electrical signals into gas concentration
values in the unit ppm (parts per million). To improve the measurement re-
sults under different operating conditions, factors such as the oil temperature
and ambient temperature as well as the flow velocity of the oil at the sensor
head are taken into account.
In addition, the device is equipped with a sensor for measuring the level of
moisture in the oil. This measurement is also taken at the measuring head
directly in the oil.
The measured values determined are stored in the internal device database
and, if the device is equipped with a display, they are also displayed on it.
The current and historical measured data can be called up and analyzed fur-
ther with the MESSKO® MSET parameterization software.
The measured values, along with warning and alarm information, can be
transmitted remotely via the analog interfaces and relay outputs on the de-
vice. Furthermore, communication via various in-part optional protocol inter-
faces for connection with SCADA systems is also possible.

4 Product description
Messko GmbH 2020 19BA4001150/10 EN MSENSE® DGA 2/3
4.3 Design
Figure1: MSENSE® DGA 2/3
1 Ventilation 2 Housing cover screw connection
3 Ball valve locking lever 4 Display
5 ENTER key 6 DOWN key
7 UP key 8 Supply voltage cable screw con-
nection
9 Signaling relay cable screw con-
nection
10 Analog outputs cable screw con-
nection
11 Interface (5-pole) for service PC
and Modbus RTU communication
12 Measuring pipe
13 Ball valve clamp connection 14 Mounting flange
15 Measuring head 16 Ball valve
17 Grounding screw 18 Safety chain
19 Fixing screw for safety chain 20 Connection for venting and taking
samples
21 Housing cover

4 Product description
Messko GmbH 202020 BA4001150/10 ENMSENSE® DGA 2/3
4.4 Safety markings and nameplate
The following safety markings are used on the product:
Figure2: Safety markings and nameplate
Description
1 Warning sign "Do not close!" on the slide valve
2 Nameplate
3 Observe the documentation
4 Observe the documentation: See the note about the oil extraction
adapter in the chapter "Installing MSENSE® DGA 2/3" [►Section
6.2.2, Page 30]
5 Ground connection on the ball valve
Table4: Safety markings and nameplate