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Manual
SF6-Breaker-Analyser
Version 2.0
A Division of WIKA SF6 Center of Excellence
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© WIKA Alexander Wiegand SE & Co. KGOtto-Hahn-Straße 1544227 Dortmund, Germany
Phone: +49 231 / 97 42 - 65 66Fax: +49 231 / 97 42 - 65 55
E-Mail: [email protected]: www.gas-dortmund.de
18.8.2010
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1 General Information 5
1.1 Information about the Manual 5
1.2 Explanation of Symbols 5
1.3 Scope of Supply 6
1.4 Liability and Guarantee 7
1.5 Copyright 8
1.6 Return and Disposal 8
1.7 Customer Service 8
2 Transport, Packing and Storage 9
2.1 Inspection after Transport 92.2 Transport 9
2.3 Packing 9
2.4 Storage 9
3 Cleaning and Maintenance 10
3.1 Cleaning 10
3.2 Maintenance 10
3.3 Calibration 10
4 Security 11
4.1 Intended Use 11
4.2 Responsibility of the Operator 11
4.3 Requirements of the Personnel 12
4.4 Dangers 13
5 Introduction 14
5.1 Operation mode of the SO2- and HF-sensor 15
5.2 Operation mode of the percentage sensor 16
5.3 Operation mode of the moisture sensor 17
5.4 Gas flow diagram 18
5.4.1 SF6-Breaker-Analyser 18
5.4.2 SO2- and SO2 /HF-module 19
5.5 SF6 application and environmental aspects 19
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6 System Operation 20
6.1 Loading of Battery 20
6.2 Description of the measuring process 21
6.3 Insertion of the SO2 or SO2 /HF-module 24
6.4 Measurement 26
6.5 Purging of the SO2 or SO2 /HF-module 29
6.6 Data 30
6.7 Settings 31
6.8 Shut down 35
7 Exchange of modules 36
8 Fault correction 38
9 SF6-recovery bags / recovery systems 38
10 Technical Data 40
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1 General Information
1.1 Information about the Manual
This manual describes a safe and adequate handling of the SF6-Breaker-Analyser. Following
the instructions of the indicated safety aspects and instructions as well as the national and/or
local rules and general safety regulations concerning the prevention of accidents are
absolutely imperative.
Before starting the work with the device read the manual completely and thoroughly
particularly the chapter security and respective safety references. Assure that you/the
operator comprehend the terms described.The manual is part of the device. It has to be stored together with and next to the device at
any time.
1.2 Explanation of Symbols
Important and safety-relevant references in this manual are characterized by symbols. These
indications which are in-line with industrial safety must be respected and followed at any
time.
Information!
This symbol calls information, which are to be considered for efficient and
perfect handling of the equipment.
NOTE! Danger for real values!
This symbol indicates references, which can lead to damages,
malfunctioning and/or loss of the device.
WARNING! Danger by electric current!
This symbol marks references, which can lead to health impairments,
injuries, lasting body damages or to death due to electric current.
VERY DANGEROUS! Injury or mortal danger!
This symbol marks references, which can lead to health impairments,
injuries, lasting body damage or to death.
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1.3 Scope of Supply
Assure that you have received the full scope of supply. If there is any part missing, please
contact the WIKA-hotline immediately.
The scope of supply consists of:
• SF6-Breaker-Analyser
• Transport case
• Battery charger
• Instrument’s quality test report
•
4 m long PTFE connecting hose with wire coating, self-closing stainless steelcouplings on both ends
• Hose connection M20x1.5 (for Coupling DN8)
• Hose connection M45x2 (for Coupling DN20)
• Coupling DN 20
• Coupling DN 8
• 2 m long interface cable RS 232
• USB adapter / serial 9 poles with CD-ROM (software driver)
• CD-ROM with SF6-Reviewer software and user manual
• Operating instructions of the SF6-Breaker-Analyser with CD-ROM• Battery-module (inserted)
• SF6-%-module (inserted)
• Moisture-module (inserted)
• SO2-module separately (inserted, not connected)
Accessories available as an option
•
SF6 –Recovery –Kit (short-term storage of the measuring gas)• SF6-MV-Pressure-Regulator (Device for using the SF6-Breaker-Analyser at SF6-
filled compartments with less than 0.5 bar overpressure)
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1.4 Liability and Guarantee
All data and reference within this manual are compiled under the valid regulations, the state-
of-the-art as well as WIKA experiences of several years.
The manual has to be stored together with and close to the device at any time and
accessible to all persons, who work with it.
This manual must be read carefully before starting to work with the equipment! WIKA does
not overtake any liability for damage and disturbances, resulting from neglect or ignorance of
the manual’s instruction.
The text and graphics do not correspond necessarily to the scope of supply. The figures
and/or diagrams do not correspond to the yardstick 1:1.The actual scope of supply might deviate from special (customized) equipments, the
recourse of additional order options or due to newest technical changes concerning the data
and references described herein as well as the graphic representations. For questions
please contact the WIKA -hotline.
WIKA reserves the right to realize technical changes of the product due to improvements
without explicitly mentioning them.
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1.5 Copyright
The manual is confidential. It is beyond doubt exclusively made and also meant for the
personnel directly dealing with the equipment. All data, texts, designs, pictures and other
representations within this manual are protected in the sense of the copyright law and are
subject to further commercial patent rights. Each abuse is liable to prosecution.
Passing it on to third persons as well as duplications in any kind and form - also in part - as
well as the use and/or report of contents are not permitted without written agreement of the
manufacturer. Offences lead to payment of damages. We reserve ourselves the right for
further legal actions as well as all further rights according to the practice of commercial
patent rights.
1.6 Return and Disposal
For a professional redemption, the device or/and its equipment must be returned to the
manufacturer or to a third party authorized by the manufacturer!
1.7 Customer Service
For questions concerning the equipment a customer service is available:
- Phone: ++49 231 / 97 42 - 65 66
- Fax: ++49 231 / 97 42 - 65 55
- E-Mail: [email protected]
The telephone hotline is attainable from Monday to Friday from 8:00 to 17:00 hours. In urgent
cases and if you use fax or email, please indicate your telephone number.
WIKA
Alexander Wiegand SE & Co. KG
Otto-Hahn-Straße 15
44227 Dortmund
http://www.gas-dortmund.de
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2 Transport, Packing and Storage
2.1 Inspection after Transport
Check the supply immediately after delivery concerning its completeness and/or transport
damages. If you detect outwardly recognizable transport damage, do not receive the supply,
or only under reservation. State the extent of the damage on the provided delivery note
and/or the transportation documents of the feeder. Generate a complaint. Lodge a complaint
of covered defect immediately after recognizing, as claims due to transport damages can
only be made valid within the complaint periods (usually 7 days).
2.2 Transport
The equipment should be moved only within the provided carrying case. By this means,
transport damages can be avoided.
2.3 Packing
If no redemption agreement concerning the packing was agreed upon, separate the different
materials according to kind and size and supply it to further use or recycling.
Information!
Dispose the packing material always environmentally friendly and according to
the valid local regulations. If necessary, ask a recycling company.
2.4 Storage
Store the device only under the following conditions:
• Until the use of the equipment keep the
provided suit-case locked
• Do not store unsecured
• Do not store outside
• Store only dry and dust free
• Avoid mechanical vibrations
• Do not expose the device to aggressive
media
• Protect the device against sun exposure
• Storage temperature: -10 to 60 °C
• If you do not use the device, check the
storage condition, regularly
• Protect against unauthorized access
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3 Cleaning and Maintenance
Natural aging and the wear of certain components of the equipment require a regular
cleaning and maintenance.
3.1 Cleaning
Clean the device only with a dry or easily damp cloth.
NOTE! Danger for real values!
Do not use cleaning agents, which contain solvents, acids or bases.
3.2 Maintenance
Maintenance of the device should only be carried out at WIKA or through specially trained
and by WIKA authorized personnel.
3.3 Calibration
The SF6-Breaker-Analyser has to be calibrated and inspected concerning its functions every
two years. To calibrate the device or single modules it has to be sent back to the WIKA or
realized through specially trained WIKA authorized personnel.
In case of a sensor breakdown or defect as well as for the calibration or when reaching the
end of lifetime (2 years for SO2- and SO2 /HF-module), each module can be removed
independently from the others. When turning on the SF6-Breaker-Analyser, the system check
will recognize the missing module(s).
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4 Security
This section gives an overview of all important safety aspects for an optimal protection of the
personnel as well as for the safe and trouble free use of the device. Additionally, the
individual chapters contain concrete safety references with respect to the prevention of direct
dangers which are indicated by symbols.
4.1 Intended Use
The device may not be operated by introducing aggressive gases or liquids! The working
reliability is only ensured when the equipment is applied for its purpose:
To measure the moisture, the SF6-concentration and the SO2 / HF - concentration in
SF6 or other non aggressive gases within the specified ranges!
NOTE! Danger for real values!
Each use of the device, that differs from the intended use is forbidden and will
be regarded as “out of purpose”.
All claims or requirements of any kind against the manufacturer and/or its authorized persons
that arise due to damages from a not intended use of the device will be rejected. All
damages that arise from a not intended use are of the operator’s responsibility.
The intended use of the equipment and its correct handling according are described in the
operating instructions of this manual. Other parts than the parts belonging to the scope of
supply, may only be used after G.A.S.’ approval.
4.2 Responsibility of the Operator
This manual must be kept in direct access and together with the device and accessible to the
operating staff at any time. The hints, information and instructions are to be followed without
any restrictions or reservation!
Besides the indicated safety references and instructions in this manual, the local rules for the
prevention of accidents and the general safety regulations - valid for the area of application
of the device - as well as the valid environmental-protection regulations are to be considered
and respected.
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The technical responsible as well as the operator should take care of a trouble free use of
the device as well as of clear definitions of the competences during operation, maintenance
and cleaning.
4.3 Requirements of Personnel
Only authorized and trained technical personnel may work with the instruments. The operator
must have received an instruction over existing and all possible dangers and should be
regularly instructed in safety procedures and environmental protection and that this
personnel is fully aware of the complete operating instructions and particularly the safetynotes. This personnel should Personnel that might be under the influence of drugs or alcohol
are to be kept off the device at any time.
Technical personnel in this context are defined as skilled employees who are knowledgeable
due to their educational background. In case the foreseen personnel do not have the
necessary qualifications to operate the instrument, it must be trained. Further to that non-
authorized personnel should not operate the device.
The competencies for the work on and with the device must be specified and kept
undoubtedly at any time so that with respect to security issues no unclear situation might
come up.Any changes of the equipment, which impair security of the personnel must immediately be
reported to the operator and every person dealing with it.
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4.4 Dangers
The equipment was subject to an endangerment analysis. The construction and execution of
the device corresponds to the today's state-of-the-art. The device is reliable in service when
operated according to its intended use.
VERY DANGEROUS! Injury or mortal danger!
The equipment is not certified for the employment in areas with explosive gas
air mixtures (zone 0).
The maximum inlet pressure of the device must not exceed 14 bar absolute. Introducing a
higher pressure into the device leads to damages of it. For safety reasons the SF6-Breaker-
Analyser automatically monitors the outlet pressure and in case of an overpressure (due to a
full recycling system or sampling bag) closes the gas inlet and the measurement is aborted
NOTE! Danger for real values!
The internal inlet valve only opens when executing a measurement. In case of
an overpressure at the gas outlet the measurement is aborted and the gas
inlet valve automatically closed to prevent further damages..
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5 Introduction
The SF6-Breaker-Analyser is a modular device to check moisture, decomposition (SO2 solely
or both SO2 and HF) and purity of SF6. The base unit contains a computer board for data
acquisition and storage, and all necessary hardware to make a physical connection to gas
insulated equipment. Users can purchase test cards for specific contaminants. The device
will function with one, two or all three cards.
Features:
• Compact, lightweight
• Highly sensitive• Low maintenance
• Automatically validates readings
• Cost-effective
• Fast test results, typically 7 minutes total
• Integrated data acquisition and storage
• Modular upgrades
• No consumables
• Battery power (8 hours)
With all three cards installed, the
operator simply makes a connection to
equipment being tested, and with the
push of a button, will receive test values
for moisture, decomposition and purity.
The test values are internally compared
to the CIGRE B3.02.01 or IEC standard
for SF6 contamination or reuse (or
customer defined value), and a pass/fail
indicator will illuminate on the analyzer.
All tests values will be stored on internal
flash memory – which can later be
downloaded to a PC. Because of the
modular approach, the user may opt to
initially purchase only one card, and as
funding becomes available, purchase the
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additional two cards later. When a card needs calibration, the entire device does not need to
be returned – simply exchange the card and avoid any downtime.
5.1 Operation mode of the SO2 and HF sensor
SO2 sensor
The applied electro-chemical sensor incorporates a gold based, three electrodes and acid
electrolyte system.
The introduced SF6 diffuses into the SO2 -sensor. Here it reacts at the sensing electrode
through an oxidative process, according to the following equation:
Equation 1: Sensing process:
Sulphur Dioxide (SO2): SO2 + 2H2O = H2SO4 + 2H+ + 2e-
The Counter electrode acts to balance the reaction at the sensing electrode, by means of an
oxygen reduction forming water as a consequence.
Equation 2: Counter reaction:
Oxygen Reduction: 1/2O2 + 2H+ + 2e- = H2O
Information!
The SO2 and HF sensor have a lifetime of two years. Using the sensors for
more than two years is not recommended as it might cause imprecise readings
due to
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The two equations represent the overall cell reaction as follows:
SO2 + ½ O2 + H2O = H2SO4
In case of a SO2 presence within the SF6 under inspection, equation 1 changes its electro-
chemical potential and electrons are released consecutively. Thus a change of currency is
detected and converted to ppmv-values via a micro processor.
The applied sensor carries a transmitter board that includes temperature compensation and
a calibration in the specified range.
HF sensorIn an HF sensor, HF reacts with the electrolyte in the form of an electro-catalytic reduction
that produces a pH change in the electrolyte. This change results in a potential change at the
sensor's electrodes, which is converted into a concentration value (ppmv values) by means of
an electronic evaluation mechanism.
5.2 Operation mode of the percentage sensor
The measuring principle is based on the evaluation of different velocities of sound of gases.
The velocity of sound in the air is about 330 m/s, while it is only about 130 m/s in pure SF 6
atmosphere. The velocity of sound measured in the measuring cell is temperature-
compensated and converted into SF6-volume content by using a microprocessor.
The measuring results are transmitted to the central processor.
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5.3 Operation mode of the moisture sensor
The moisture sensor is based on the absorption of water molecules in a special ceramic
material. Only vapour penetrates the covering electrode by diffusion and agglomerate
reversibly to the polymer. Therefore, the capacity of the sensor changes, which is registered
by the evaluation electronics and is converted into a standard signal. This signal is
transmitted to the central processor.
Schematic Diagram of the moisture sensor
Deckelelektrode (dampfdurchlässig)
Polymer
Kontaktstelle(Deckelelektrode – Anschlussfläche – Draht)
Grundelektrode+ Kontaktfläche
(Grundelektrode – Anschlussfläche – Draht)
Trägermaterial
C = f (%r.F.)
Cges = C0 + C%r.F.
Ca acitive ol mere
Base
Ground electrode+ Contact area(Ground electrode – connection area – wire
Contact spot(Cover electrode – connection area – wire)
Polymere
Cover electrode(vapour permeable
C = f(%RH)Ctotal = C0 + C%RH
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5.4 Gas flow diagram
5.4.1 SF6-Breaker-Analyser
Pos. Designation
1 Coupling NW 53 Solenoid valve4 Pressure sensor 200 psi abs.5 Pressure regulator
6Coupling piece 1/8“ inside threadOrifice plate
7 Coupling 1/8“ inside thread
8Coupling piece 1/8“ inside threadOrifice plate
9 Coupling 1/8“ inside thread
10Coupling piece 1/8“ inside threadOrifice plate
11 Coupling 1/8“ inside thread12 Pressure sensor 100 psi abs.13 Pressure sensor 15 psi14 Coupling15 Rinsing switch
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5.4.2 SO2 - and SO2/HF - module
5.5 SF6 application and environmental aspects
Since 1900, when SF6 was synthesized for the first time by Moissan and Lebeau, its
industrial applications have gradually increased. The remarkable gas inertness and thechemical and dielectric properties caused the General Electric Company in 1937 to suggest
its use in electrical equipment. The large-scale employment of SF6 in electrical
manufacturing started around 1960 in the U.S.A. and Europe. In that year the first use of SF6
in circuit breakers and switches for high and very high voltages was reported. So far there is
currently no suitable substitute for SF6 as an arc suppressant in high and medium voltage
electrical switchgear.
To protect the environment it is important to reduce the SF6 emissions, because SF6 is a
gas with a global warming potential 22,200 times greater than CO2 and an atmospheric life
time of 3,200 years. Thus SF6 is a potent greenhouse gas.
Further SF6 is one of the 6 named gases in the Kyoto Protocol giving reduction targets for
2008 –2012 and beyond that.
Using the SF6-Breaker-Analyser the use of appropriate recovery bags and systems are
recommended to ensure a closed loop and to avoid any SF6-Emissions.
Information!
Never close the gas outlet while the device is being operated. Otherwise the
measuring process is aborted.
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6 System Operation
6.1 Loading of Battery
The SF6-Breaker-Analyser is equipped with a 5,2 Ah Lithium-Ion battery which allows to
operate the device for approximately 8 hours. Internal monitoring of the battery voltage gives
a battery warning message if the battery it is low. If not recharged, the system consecutively
executes an automatic shutdown to avoid any damages.
To recharge the battery:1. Turn off the SF6-Breaker-Analyser.
2. Connect the power plug connector of the delivered battery
charger to the power socket.
3. Plug the instrument’s connector into the socket on the back
plane (see picture).
4. Wait until the red charge lamp of the battery charger is
extinguished. The battery is charged with a charge current of 2,2A and a voltage of 16,8V. The maximum charge time of an
empty battery is approx. 2,5 hours.
5. Disconnect the plug-ins.
6. The SF6-Breaker-Analyser is again ready for measuring.
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6.2 Description of the measuring process
Fig 6.01
Before starting measuring the transport protection of the SO2-Module (or SO2 /HF-Module)
has to be removed and the module has to be inserted (See chapter 6.3). As soon as the
device is switched on, the start screen appears (ill. 6.02). After a short initialization time the
component check follows. The correct function of each component is confirmed or indicated
by the “ “-mark. (fig. 6.03). If a SO2 module or a SO2 /HF-Module has been inserted is
indicated by a frame (fig. 6.03, a SO2 /HF-Module is inserted). In case a component is not
ready for operation or not inserted (correctly) it is indicated by a cross on the display. At the
end of the successful initialization process, the base menu (fig. 6.04) turns up. All functions
of the SF6-Breaker-Analyser are accessible through this menu.
Fig. 6.02 Fig. 6.03
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The menu items described under illustration 6.04 can be selected as follows:
Fig. 6.04
• Measurement:
In this menu item the measuring process can be started. (see chapter 6.4)
• Flushing:
In this menu item the flushing of the SO2-module (or SO2 /HF-Module) with ambient air
after measuring a concentration of SO2 and/or HF (SO2 /HF-Module) can be carried
out. (see chapter 6.5).
•
Data:This menu item indicates the stored data, which can be deleted and transmitted to a
connected computer. See chapter 6.6 and the manual of the SF6-Reviewer software.
• Settings:
This menu item allows to change the settings of the device and parameters of the
measurement (see chapter 6.7 “Settings“)
According to the hardware configuration of the device it is possible that not all sensor values
are available, which is indicated by the “---“ mark for the missing sensor(s). The status bar,
which shows the date, the lifetime counter for the SO2 sensor (and for the HF–sensor too in
case of the SO2 /HF-module) called “SO2-life” and the temperature as well as messages on
the status bar of the different processes, is permanently visible on the bottom line of the
screen.
Information!
As the SO2 sensor (and the HF-Sensor in the SO2 /HF-module) has a
recommended lifetime of two years the ”SO2-life” counts up the lifetime of the
installed SO2 module / sensor (or SO2 /HF-module) in daily steps. Approaching
the 2 years lifetime (or 730 days) the device gives a message 60 days before.
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6.3 Insertion of the SO2-module or SO2/HF-module
The SO2-module (or SO2 /HF-module) is delivered inside the SF6-Breaker-Analyser, but
electronically and with respect to the gas not connected. It is delivered with a transport
protection. Before turning on the SF6-Breaker-Analyser remove the two stickers and the
rubber foam of the transport protection (blue arrows in figure 6.05). Insert the module and fix
the 4 screws of the module (red rings in figure 6.05).
Fig. 6.05
Open the front panel by loosening the screws marked in picture 6.06 and realize the gas
connection of the module by plugging the green marked quick connectors onto the SO2-
module’s (or SO2 /HF-Module’s) adaptors (see picture 6.07).
Fig. 6.06 Fig. 6.07
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Shut the front panel again and fix the 2 screws. After switching-on the SF6-Breaker-Analyser,
the device recognizes a newly calibrated SO2-module or SO2 /HF-module and the lifetime
counter of the module is automatically initialised and reset. Its activation is confirmed in the
status bar (see figure 6.08).
Fig. 6.08 Activation of lifetime counter
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6.4 Measurement
Connect the SF6-Breaker-Analyser to the gas compartment to be tested using the 4 m long
hose and the corresponding couplings. Assure that the gas outlet on the back plane is not
covered or closed or that it is properly connected to a recycling system (see chapter 10) or
recovery bag (available at G.A.S., SF6-Recycling-Kit, TEDDLAR, LINDE, etc.).
Procedure:
Fig. 6.09 Fig. 6.10
1. To carry out a measurement, click on “Measurement“ in the corresponding
“Measurement” submenu (see fig. 6.04). The test time of the SF6 gas can be defined
by the operator or turned off under the menu point “Settings” (see chapter 6.7).
Recommended test time of the SF6-Breaker-Analyser is typically 7 minutes. Turning
off a defined test time allows the operator to save the displayed sensor values at any
time.
After starting “Measurement” and assuring a gas flow, it is recommended to
rinse the 4 m long hose immediately by pressing the rinsing knob (purge) at the
front panel of the device in order to shorten the subsequent measurement time.Pressing the purge knob for approximately 2 to 3 seconds is sufficient to flush
out the gas inside the hose.
2. Firstly the “Measurement preliminary” dialog with important pre-requisites for a
measurement (fig. 6.09) turns up. All 3 points have to be fulfilled/ carried out before
starting a measurement. This implies that a leakage free hose connection between
the gas filled compartment and the device has been realized. The maximum inlet
pressure of the SF6-Breaker-Analyser is 14 bar absolute (ambient plus compartment).
The inlet pressure is indicated in absolute pressure as default.
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3. After initializing the measurement process by confirming the dialog (see 6.09), the
test runs automatically and lasts (according to the instrument’s settings, see chapter
6.7) some minutes (7 minutes default). During the measurement all sensor values
and their changes are displayed permanently (fig. 6.10). If the values of the three are
better than the set criteria with respect to a possible contamination the operator can
terminate the measurement by executing the “skip” button and display the current
values of the measurement. The final result is displayed at the end of the
measurement (fig. 6.11). The indicated values are: SF6-percentage, moisture, SO2-
concentration and in case of a SO2 /HF-module, HF too. Further to that the inlet
pressure, the date and time of acquisition as well as the result are shown on the left
side of the screen.
Fig. 6.11
Visual data interpretation through the installed LEDs on the front panel:
• “Ok“: The values of the SO2-concentration, the moisture and the SF6-
percentage are within the set tolerance (see settings, green LED lights
up and all sensor values on the screen are marked with a confirmation
“ “).
• “Contaminated“: The SO2-concentration and / or one of the values for
the moisture and the SF6-percentage exceed the set tolerance (see
settings, red LED lights up, the sensor(s) is / are marked with a twinkling
cross).
Information!
All implemented sensors are temperature compensated. All sensors work at
atmospheric pressure (1bar). This should particularly be taken into account
concerning the dew point, which displays dew point values over ice.
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• “Undefined“: The quality of the measuring data is very bad so that a
corresponding evaluation is not possible (red LED lights up).
1. In case “Close” is confirmed the acquired data can be stored in the device.
2. If the user stores the data by clicking “Close”, the dialog “Set measurement name”
appears. The user is requested to generate a name for the measurement (fig. 6.12). The
length of the name is limited to 16 digits (letters or symbols). There is no guideline for the
name. Alternatively and to shorten this process, one of the last five names can be used
and modified by selecting them by the use of “ ”-symbol.
Fig. 6.12
Information!
The value of the HF is not related to the visual data interpretation (for the
SO2 /HF-module), only SO2 value. Until today no limit for HF is given by any
authorisation body.
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6.5 Purging of the SO2-module or SO2/HF-module
Fig. 6.13
After measuring a SF6 sample with a SO2 concentration above zero and/or a HF
concentration above zero in case of the SO2 /HF-module inserted the SO2-sensor and the HF
(in case of the SO2 /HF-module) have to be purged with ambient air to clean and reset the
value(s) to 0. Therefore leave the SF6-Breaker-Analyser turned on and execute “Flushing” in
the main menu (fig. 6.04). The pump inside the SO2-module / SO2 /HF-module starts rinsing
ambient air through the SO2-sensor or through the SO2-sensor and HF-sensor. This process
should not be stopped until the value(s) have reached 0 ppmv again in order to secure a
precise reading for the next measurement. The pumping process can be stopped or aborted
by pressing “Close” by the operator. The SF6-Breaker-Analyser is again ready for operation.
Information!
To secure a longer lifetime and a correct reading the SO2-sensor and
the HF-sensor (in case of the SO2/HF-Module) has to
be purged each time a SO2-concentration of > 0 ppmv and a HF-
concentration of > 0 ppmv is measured.
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6.6 Data
The submenu “Data“ (fig 6.14), which is reached from the main menu allows to look at stored
data (fig. 6.11 and 6.15). Under “Show measurement” the stored data of each measurement
can be chosen (fig 6.15). The selected measurement is displayed with all its details (fig.6.11).
Measurements can be deleted from the memory by selecting “Delete Measurements“.
The last menu item “Export measurements” starts the “SF6-Reviewer“-mode (fig 6.16), which
allows the download of stored data from the compact flash card of SF6-Breaker-Analyser to a
connected PC (for this purpose see the user manual of the SF6-Reviewer).
Fig. 6.14 Fig. 6.15
Fig. 6.16
Information!
Please note that only all measurements can be deleted from the internal
memory, not single or selected ones.
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6.7 Settings
Some specific settings are selectable in the “Settings“ menu (fig. 6.17). The adjustable
values are categorized in “Acquisition“, “Date / Time”, “Sensors” and “Device”.
Fig. 6.17
Fig. 6.18 Fig. 6.19
Acquisition (Settings/Acquisition) (fig.6.17)
Concerning the determination of SF6 test values and to operate the SF6-Breaker-Analyser in
a correct way, the following points are very important:
• Duration: The test time can be adjusted or turned off. When operating the SF6-
Breaker-Analyser with all sensors, the recommended test time is 7 minutes, as the
typical T90 duration for the moisture sensor to measure a dry sample (-45 °C to -55°C)
takes this time. Turning off the test time (by using the steering knob) allows to save
the acquired and displayed values at any time.
• Limits: (Data acquisition / Limits) (fig. 6.19)
The set values determine how the SF6 –Breaker-Analyser interprets the measuring
result. In case the SF6 gas under inspection does not fulfil to the following criteria, the
SF6-Breaker-Analyser shows the result of a contaminated gas:
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o Min. SF6-%-value: The content of SF6 –purity is below the set limit.
o
Maximum dew point: The humidity content (dew point) exceeds the set value.o Max. decomp. prod.: The SO2-concentration within the SF6 is exceeded.
The max. tolerable values, recommended in the SF6 Recycling Guide (Revision
2003) of CIGRE (B3. 02 Task Force 01), used as factory defaults, are as follows:
o Min. SF6-%-value: 97 % (or max. 3% for air and CF4)
o Max. dew point: -5 °C dew point
o Max. SO2-concentration.: 500 ppmv (2,000 ppmv total max. in equipment)
12 ppmv (50 ppmv concerning the re-use)
Fig. 6.20 Fig. 6.21
Date / Time (Settings / Date/Time) (fig. 6.19)
The internal system time is very important for the operation of the SF6-BreakerAnalyser.
Synchronisation processes, shutdown and expiration times as well as time indication of
measurements are determined by the internal clock. The setting of the system time can be
carried out by the following four menu items:
• Set: Setting of the clock and date. Prior to the setting of time and date the time zone
and the time modification should be determined under “Time zone“ and “DST
automatic“. (fig. 6.21)
Information!
Please note that for HF no maximum tolerable impurity value is given by any
authorisation body until today.
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• 12 hour clock: In case of a displayed cross, the time output has a 12 hours format, if
not, a 24 hours format.
• DST automatic: Automatic time modification. Many countries shift their time in
summer. The installed automatic system realizes the time shift of 1 hour as valid for
Central Europe (CEST). In Central Europe the summer time usually starts in the last
weekend of March and ends at the last weekend of October, Saturdays at 2:00 a.m.
or 3:00 a.m. A displayed cross indicates the activated automatic time modification.
Settings of Sensors (Settings/Sensors) (fig. 6.22)
Following settings of the sensors can be adjusted:
• Dew point: Dependent on the indicated mode, the moisture is displayed either in °C
dew point over ice, ppmv , ppmw or °C dew point over ice at compartment pressure
(pressurized dew point). The unit for the pressurized dew point is displayed as [°C Pr]
(Fig. 6.23). The selected mode is valid for the output in the base menu.
• Pressure: The operator can select between readings in kilo Pascal “kPa“, bar “bar“ or
pound per square inch “psi”.
Fig. 6.22
Fig. 6.23
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• Temperature: The operator can select between readings in Celcius “°C“ or Fahrenheit
“°F“.
• Inlet pressure: The inlet pressure can selectively displayed as a absolute “abs.” or
relative “rel.” pressure.
The factory defaults are in dew point, bar, Celsius and inlet pressure absolute.
Fig. 6.24 Fig. 6.25
Settings of the Device (Settings/Device) (fig. 6.24)
The following settings of the device can be adjusted:
• Contrast: The contrast of the LCD.
• Overheat alarm: The temperature of the SF6-Breaker-Analyser is controlled. In case
the internal temperature exceeds the set limit, a warning message is displayed and
the instrument additionally gives an audible alarm. For its protection the SF6-Breaker-
Analyser is automatically switched-off after some seconds.
• Info about …: This menu item reveals the serial number of the device and the board
as well as the version and revision number of the firmware.
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6.8 Shut down
Assure that the hose has been disconnected. Turn off the SF6-Breaker-Analyser by pressing
the “Power”-switch on the front panel. For a longer lifetime the SO2 sensor and the HF-
sensor (in case of a SO2 /HF-module installed) needs some residual humidity when being
stored. In order to achieve this, ambient air is automatically pumped through the system for
15 seconds, displayed through a count down. The system will subsequently turn off.
Fig. 6.26
Information!
The automatic flushing function is disabled if the device is turned off through
the operator within the first 15 seconds after turning on.
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7. Exchange of modules
Firstly open the front panel by loosening the 2 screws on the top of the front panel like shown
in figure 6.06 and let it swing down.
Remove the connecting hoses of the gas input and output (two hoses per module) so that
the module to be exchanged can be taken out.
Open the gas connecting couplings (quick release couplings) by pulling back the locking ring.
The couplings are tight on both sides so that no air can pour into the system. Consecutively
secure the hose end so that it cannot buckle, e.g. by using a wire tie or scotch tape.
Connections topercentage sensor
Connections tomoisture sensor
Connections toSO2- or SO2 /HF- module
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For dismounting the cartridge loosen the fixing screws of the requested module on the back
side of the device and carefully pull out the module using the handle.
The calibration and final control in accordance with the company’s quality
assurance is indicated on each sensor cartridge with month and year on the
test badge.
The calibration services for the device is listed below.
Calibration and verification of the complete device
Calibration of the SO2-module (through exchange of SO2-sensor)
Calibration of the SO2 /HF-module (through exchange of SO2-and HF-sensor)
Calibration of the percentage sensor module
Calibration of the moisture sensor module
Information!
When returning the modules to the manufacturer use appropriate packing to
avoid any transport damage.
Percentage sensormoduleMoisture sensor
moduleSO2- or SO2 /HF -module
Battery unit Gas outlet
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8. Fault correction
It is not recommended to carry out repair works of the SF6-Breaker-Analyser by yourself.
(except for the disassembling of single modules). Do not carry out any repair or other works
on the modules. In case of malfunction return them to the manufacturer.
Messages on the display of the SF6-Breaker-Analyser
During the operation, different messages can appear on the display. The messages are self-
explanatory or mentioned in the above description of the measuring process.
In case unknown error messages appear, particularly in connection with malfunctions contact
the manufacturer.
9. SF6-recovery bags / recovery systems
Legal directives becoming more and more strict and the voluntary self-commitment of the
SF6-users also require the collection of used gas even of smallest amounts of SF6, as being
discharged during measurements. For this purpose, recovery bags as well as recovery
systems have been developed.
The SF6-Breaker-Analyser is equipped with a gas outlet at the back plane that can be easily
connected to a recovery system like SF6-Recovery-Kit. The internal pressure monitoring of
the SF6-Breaker-Analyser executes an automatic abortion of a measurement in case of an
overpressure caused by a filled up recovery system in order to avoid any damages to the
device and incorrect readings.
This technical design allows the SF6-Breaker-Analyser to be operated with or without
recovery bags or a recovery system. Still G.A.S. highly recommends to use such systems for
environmental reasons.
According to the standard configuration the
outlet is open, which means that the gas is
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released to the atmosphere. If a recovery bag or system is connected the inspected
SF6 is collected in a depressurized condition via the connecting hose. After having
reached the maximum consumption capacity of the discharge recovery system, the
installed compressor switches on and the collected measuring gas is forwarded into
a connected gas cylinder. G.A.S. recommends to use its SF6-Recovery-Kit for
collecting and handling the inspected gas properly.
For further details please contact WIKA-Dortmund/G.A.S..
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10 Technical Data
SYSTEM Sensor 1 Sensor 2
Connection SO2- and SO2 /HFMeasuring range Moisture-Measuring range
Self-sealing quick connector SO2:0 - 10 / 20 / 100 / 500 ppmv (selectable)SO2 /HF: 0-10/0-10 ppmv or0-20/0-10 ppmv (selectable)
+ 20 to -60 °C dewpoint
Pressure Indication Indication0,5-14 bar (gaseous)with automatic flow rateregulation
Resolution: 0.1 ppmv (0-10,20)and 1 ppmv (0-100, 500)Temperature compensated
Related to ambient pressureandtemperature compensatedin °C td, ppmv and ppmw and dew point at compartmentpressure (pressurized dewpoint) °C td Pr
Flow rate Tolerance ToleranceDepending on installed modules ± 1 ppmv (0-10,20)
+/-2% of valueDewpoint +20...-40 °C: ±2°C
dewpoint < -40 °C: ±4°C
Operation Humidity range Flow rate-Purge function for tube cleaning-Cleaning function with ambientair if necessary (for SO2 andSO2 /HF-module)
up to 90 % no condensations 20 L/h
Display Lifetime CalibrationEvery 2 yearsGraphic Display (240x128 Pixel) 24 months from installationSensor 3
Supply Calibration SF6-Percentage
Lithium-Ion battery with min. 8 hCapacityRechargeable 100-265 AC V50/60Hz
not required 0 – 100 Vol. % SF6
Temperature Maximum zero shift ToleranceStorage: -10 to 60 °C
Operation: 0 to 50 °C
0,1 ppmv ± 0.5 % based on SF6-N2-
MixturesDimensions Long-term stability Flow rateEnclosure: 380 x 185 x 440 mm(BxHxL)
< 1 % signal degradation permonth (linear)< 0.5% (0-500 ppmv)
3 L/h
Weight Flow rateapprox. 12 kg 10 L/h
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