Gas density monitoring/analysis/handling I Asset protection

Power transmission anddistribution industry

WIKA in brief
A family businesssince 1946

> 11,200 employees
Global service anddistribution

1.2 billion euro turnover
Quality management:
ISO 9001, ISO 13485
Environmental

management: ISO 14001
2„

WIKA’s unique experienceand know-how makesensing technology
smarter, add more value
and prepare it for asustainable future.

CONTENTSSUSTAINABILITY AT WIKA

4

WEgrid Solutions

6

Plant safety8

Gas density monitoring

10

Connecting parts

18

Gas analysis

22

Filling and handling equipment

28

Partial discharge and temperature monitoring

34

WEgrid Asset Protection

36

Wireless gas density measurement40

Training

42

WEgrid Services

44

Facts about SF₆ gas

46

WIKA WORLDWIDE

48

Power transmission and distribution is undergoing

As the market leader in measurement technology, we

and digitalisation pose challenges for the industry.

innovative and high-precision products, IIoT solutions

radical change. The megatrends of decarbonisation
Energy companies have to integrate renewable energy
sources into existing electricity grids, which makes
their operation more complex. Furthermore, it isimportant to implement smart digital technologies anddevelop new business models. Successfully shapingchange requires the experience and expertise of strong
partners.

support your transformation with a broad portfolio ofand services, which we are continuously developingwith more than 100 development engineers. Together
with our global service and distribution network andour own production, we offer smart, efficient, and sustainable top quality for your requirements.

In this way, we can continue to grow together.

That is “Smart in sensing” and you can rely on it now
and in the future.

Alexander Wiegand,

Chairman and CEO, WIKA

3

SUSTAINABILITY AT WIKA
Enabling sustainable progress
Preserve a planet that can be lived on for future generations.
This goal increasingly determines the actions and thinking at
WIKA – and makes sustainability a driver for innovations.
Sustainability, as we understand it, has many facets. It
includes ecological, social and economic aspects. We are
therefore firmly convinced that we can only shape our future
positively with solutions and processes that are conceived
holistically.
The demands we place on our ecological endeavours are
therefore: to use resources as sparingly as possible, tominimise emissions along the entire value chain, to enforce
the highest environmental standards and to think more interms of circular systems.

In addition, we expand global cooperation, provide innovative
impetus for our markets and, thanks to a high level of
in-house manufacturing depth, we can control a large part ofthe conditions and effects of our economic activities.
With climate-friendly production, the ecological footprint of
which is constantly decreasing, WIKA is ever more sustainable. With our solutions we enable others to implement
efficient, and therefore resource-saving, processes.
Because sustainability is teamwork – and we are committed
team players. Accordingly, we want to drive forward thetransformation of the economy together, and thus preserve
the beauty of our planet for future generations.

On a social level, we create a modern and respectful working
environment for our employees and partners, work on a basisof trust with our suppliers and support education anddevelopment projects worldwide.

Sustainability report41.5 °C■ “Aim: Global warming below 1.5 degrees by 2100”.

■ This means reducing the man-made global temperature
increase caused by the greenhouse effect to 1.5
degrees Celsius.

■ At the 21st UN Climate Conference in 2015 (COP 21),
almost all the countries of the world, with the Paris
Agreement, signed a treaty whereby they would makeefforts to achieve the 1.5 degree target.

■ SF₆ gas is the strongest greenhouse gas worldwide andthus has a negative impact on global warming.

■ Responsible use of SF₆ gas.

■ The correct and safe handling and online monitoring of SF₆ gas is very important.

CO2

SF6

=

5,000,000 SF6 gas-ﬁlled compartments> 3,800,000 cars each driving 200,000 km

Leakage rate = 0.1 %/a*Leakage over lifetime ** = 4,000 tons of SF691,200,000 tons of CO2**** Spec. of new GIS** Lifetime = 50 years*** CO2 equivalent of SF₆ = 24,300

5WEGRID SOLUTIONS

Alexander Hein
Vice President
WEgrid Solutions“

We support the digital transformation of thepower transmission network with solutions
to modernise maintenance processes
and radically reduce greenhouse gas
emissions of electrical switchgear.

6

Innovation is our passion – quality
our principle

Who we are
Proper operation of gas-filled equipment requires a large
number of special instruments and specialist know-how.
WEgrid Solutions is an expert team, consisting of WIKA
employees specialised in specific requirements of the powertransmission industry.
WEgrid Solutions is the only supplier on the market thatoffers a complete product portfolio and customised complete
solutions for plants filled with SF₆ gas and alternative gases.

Our daily motivation is to constantly improve the protection ofpeople, machinery and not least the environment. To
accomplish this, we use our passion for technologicalprogress. We are a versatile team of creative people withextensive expertise and innovative capacity.
As all WIKA employees, we attach great importance to thefundamental principles of our family-run company and are
guided by them in our everyday working life. That is why thehighest quality is a matter of course for us at all times.

What we do
WEgrid Solutions stands for intelligent SF₆ and alternative
gas solutions tailored to your needs.
With our three segments, we offer products and services for
all areas of interest in the industry.

grid

Products

Our comprehensive product portfolio covers all areas ofgas-filled equipment:■ Gas density monitoring■ Gas analysis■ Connecting parts■ Gas handling■ Online monitoring

grid

Maximum plant safety through digitalised gas monitoringembedded in intelligent overall solutions – everything fromone source. This is WEgrid Asset Protection. Our high-quality
products are combined with adapted data transfer technology
and intelligent software. We plan and implement the entire
project. Thus, we design your SF₆ gas monitoring as simple
and safe as possible.

grid

We see ourselves not only as a product supplier, but also as along-term partner of our customers. That is why we support
you for a long time after commissioning of our products.

Asset Protection

Services■ Repair and maintenance■ Commissioning■ Rental service■ On-site gas analysis■ Seminars and consulting

7

PLANT SAFETY
WEgrid Products –Gas density instrumentation ensures plant safety
For safety reasons, the filling volume of SF₆ gas, oralternative gases, is defined for each gas compartment
and monitored using a density measuring instrument.
WIKA's gas density determination is made with pressure
measurement that has been specifically adapted to the 'realgas' behaviour by compensating for the effects of temperaturechanges. Measurement uncertainties, resulting from thefluctuating ambient pressure, are also eliminated by thehermetically sealed case.
Should the gas density decrease due to leakage, definedalarm contacts in the gas density monitor provide a warningor, if the lower limit is reached, shut the plant down.
Modern plant monitoring in the era of the “Smart Grid”
requires the use of gas density transmitters with analogue ordigital signal output.

SCADA: Supervisory control and data acquisition

8

The transmitters allow a more precise, continuous andcentral signal monitoring.
The signals or data packets sent are permanently monitored
by SCADA systems with integrated data storage and dataprocessing.
In addition to the gas density measurement, the GDHT-20
multi-sensor can provide pressure, temperature and humidity
signals in Modbus® protocol.
Alongside the instrumentation, WIKA offers analytics andhandling products and connecting parts.

Proactive plant monitoring and service forhigh-voltage switchgear
The online monitoring with trend analysis of the SF₆ gas, or alternative gases,
reduces the risk of failure and the operating costs.
The continuous visibility of the plant status enables operators to move away fromthe previously used preventive or reactive maintenance strategies. In the future, theelectricity grid operators will be able to implement a condition-based service andmaintenance strategy. Unnecessary work within defined maintenance cycles iseliminated. Thus, the number of service calls for fault rectification and the associated plant downtime is reduced significantly. If a leak is detected with the gas
density measuring instrument, its exact location can be determined with theportable SF₆ detection instruments from WIKA and repairs undertaken.

AnalysisWith the help of WIKA gas analytic instruments, the condition of insulating gases
like SF6 or alternatives in the plant can be determined directly in the field. Within
5 to 10 minutes, directly on-site, the user is able to decide whether the equipment
needs repair. Depending on the instrument version, the quality parameters ofpurity, humidity and concentration of decomposition products are measured.
Operation is very simple, since after the connection of the gas compartment, themeasurement must simply be started manually. The automatic flow control
provides for precise and reproducible results. Following the measurement, theresult is compared to the applicable benchmarks in accordance with IEC orCIGRE, and, depending on the instrument version, can be saved.

Connecting parts
For the filling or evacuation procedure for SF₆ tanks, reliable connection technology
is required in order to prevent gas leakage and to enable efficient operation. WIKA
connecting parts fulfil the highest customer requirements, and include valves,
couplings, hoses and other components.

Handling
Filling and handling equipment can be used for the filling and treatment of SF₆ gas.
Depending on the application, equipment is used in manufacture, installation andmaintenance. The size of the plant depends on the volume of the gas compartment
being worked upon. Depending on the customer requirements, the operation,
performance and form of the equipment varies.

9

GAS DENSITY MONITORING
Plants filled with SF₆ gas, or alternative gases, are often exposed to harshconditions, including, for example, extreme temperature fluctuations, strong winds,
high air humidity and ambient pressure changes.
In the face of this, to ensure optimal operational safety of the plants, the correctinterpretation of the gas density measurement is of central importance.
The SF₆ gas and alternative gas density measuring instruments from WIKA areespecially durable.

10Temperature compensation of pressure
measuring instruments
The principle reason for pressure changes in plants filled with SF₆ gas oralternative gases are changes in the ambient temperature. With known gas
pressure and temperature, the gas density can be calculated exactly.

ppDisplay

PressureDensity

Temperaturecompensation

20 °C

Temperature

20 °C

Temperature

In the diagram on the left, the black horizontal line represents the current gas
density. The light-blue line shows the rising pressure due to rising temperature
measured with a standard pressure gauge. So that the correct gas density may be
determined using a pressure measuring instrument, the pressure increase
resulting from the rise in temperature must be compensated in the indication.
In the diagram on the right, the temperature-compensated pressure indication,corresponding to the gas density of the gas tank, is shown.

Long-term advantages

Technology

WIKA productConstant indication withtemperature changes

Temperature compensation■ Density monitor■ Density indicator■ Density switch■ Density transmitterNo condensation problems on thewindow

Hermetically sealed case orcompensating diaphragm■ Density monitor

No influence due to altitude oratmospheric pressure

Hermetically sealed case orabsolute pressure measurement
by means of metal bellows■ Density monitor■ Density indicator■ Density indicator■ Density switch■ Density transmitter

Measuring system will not leakor corrode■ Welded measuring system from■ Density monitor■ Helium leakage rate

■ Density switch

316L stainless steel< 1 x 10 −8 mbar x l/s■ Density indicator

Reliable switch point setting

Fixed setting■ Density monitor

Sealed, tamper-resistant case

Case secured with weld spot

■ Density monitor■ Density switch■ Density indicator11Temperature compensation principles
Bimetal: Density monitor and density indicator
A bimetal between the
movement and themeasuring tube converts
temperature changes intochanges in length.
The indication on the dial isconstant, despite thetemperature-inducedpressure variations. Only
declining pressure due toloss of gas is displayed.

pActual pressure profile

0 °C

<2

Bimetal

p

Tank

20 °C

0 °C

>2

60 °C
TemperaturepBimetal

Display

20 °C

20 °C

60 °C
Temperature
Compensation of the indication

60 °C
Temperature
Temperature-compensated display andswitching

Reference chamber: Density monitor and density switch
A chamber filled with SF₆ gas or an alternative gas serves asa reference. With environmental influences, the referencechamber behaves the same as the tank and thus does notcause any change in the switching or display status.
High voltage

Medium voltage

Referencechamber

p

p

Tank

20 °C
Actual pressure profile

12

60 °C
Temperaturep

Metal bellows

20 °C
Reference chamber

60 °C
Temperature

Display

60 °C
Temperature
Temperature-compensated display andswitching
20 °C

Electronic sensor: Density transmitter
A pressure transmitter specifically developed for SF₆ density measurement delivers a temperature-compensated output signal.

Ustab
+
–

Compensationof p through T

Wheatstone bridge with temperature compensation for SF₆ gas or alternative gas

13

PRODUCT OVERVIEWGAS DENSITY MONITORING
The components and processes for manufacturing WIKA's
SF₆ measuring instrument family have proven themselves in
the widest variety of industries and applications. With thehelp of WIKA's extensive modular system for measurement
technology, the instruments have been specifically designed
and optimised for SF₆ gas and alternative gas applications.
This results in synergies that benefit the customer in the longrun.

With the wide range of instrument variants, different customer requirements are served, in terms of equipment,
measurands, measuring ranges, accuracy and alarmfunctionality.

Gas density instrumentation

Model

GDI-63, GDI-100

GDM-RC-100

GDM-RC-100-T

GDM-63, GDM-100

Model designation

Gas density indicator
NS 63 and 100

Gas density monitor
NS 100Hybrid gas density monitor
with Modbus® or analogue
signalGas density monitor
NS 63 and 100

Output–Max. 4 switch contacts

Max. 4 switch contacts■ NS 63:

max. 2 switch contacts■ NS 100:

max. 3 switch contacts

Special features■ Bimetal compensation■ Dial layout to customer

requirements■ Reference chamber■ Reference chamber■ Bimetal compensation■ Complete local display■ On-site display withof the density andvacuum range on a
100-mm dial

■ Microswitch■ Online monitoring

compensationof the density andvacuum range on a
100-mm dial

■ Increased plant safety

through self-diagnostics■ Excellent shock

resistance■ Optional recalibration

valve

compensation

switch contacts anddigital or analogue
outputwith the highest
measurement accuracy■ Live availability of■ Complete local display■ Dial layout to customer

requirements■ Optional recalibration

valve

pressure, temperatureand gas density
measured values(Modbus® RTU) or
compensated pressureor density (4 ... 20 mA)■ Suitable for alternative

gases

Data sheets

14

SP 60.21, SP 60.03

SP 60.27

SP 60.80

SP 60.70, SP 60.02

Mechanical and mechatronicgas density measurement

Electronic gas density
and gas condition measurement

While gas density indicators only show the temperaturecompensated filling status on a colour-coded dial, gas
density monitors offer additional alarm signals at predefinedswitching thresholds for equipment monitoring. Offering only
the switching function, gas density switches complete theportfolio for this sector.

The analogue and digital transmitters provide continuous
signals or data packets for evaluation in the SCADA control
rooms of modern transformer and distribution stations.
Through the combination of transmitter and gas density
monitor, in addition to the signal redundancy, it is possible toread the status of the SF₆ gas or alternative gas − on-site andin the control room.

GDM-100-T

GD-20

GD-20-W

GDHT-20

GDI-100-D

Hybrid gas density
monitor with Modbus® oranalogue signal

Transmitterfor gas density,
temperature andpressure with Modbus®
or analogue output forcompensated pressure or
density

Battery-powered wirelesstransmitter for gas
density, temperatureand pressure with
LoRaWAN® output

Transmitter for gas
density, temperature,pressure and humidity with
Modbus® output

Digital gas density indicator NS 100

Max. 3 switch contacts

Modbus® RTU via RS485
or 4 ... 20 mA

LoRaWAN®

Modbus® RTU via RS485

Bluetooth®

■ On-site display with■ Calculation of the gas■ Calculation of the gas■ Calculation of the gas■ Calculation and on-■ Up to 247 trans­■ Up to 12 years battery

switch contacts anddigital or analogue
output■ Online monitoring withhigh measurement
accuracy■ Live availability ofpressure, temperatureand gas density
measured values(Modbus® RTU) or
compensated pressureor density (4 ... 20 mA)

density values

mitters on one master(Modbus® RTU)

■ Compact design■ Suitable for alternative

gases

density values
life■ Compact design■ Low installation effort

 ideal for retrofit
applications■ Suitable for alternative

gases

density or gas humidity
values■ Online monitoringsite display of gas
density, pressure andtemperature

with the highest
measurement accuracy■ Integrated data logger

on one master■ Data export by means

with adapter ormeasuring chamber■ Battery-powered■ Up to 247 trans­mitters■ Optionally available

for up to 20,000
measured valuesof Bluetooth®

■ Suitable for alternative

gases■ Suitable for alternative

gases■ Variants with integrated

or mounted sensor

SP 60.79

SP 60.77

SP 60.78

SP 60.14

SP 60.07

15

PERIODIC CHECKING OFLEAKAGE DETECTIONSYSTEMSGas density monitors and gas density transmittersreliably warn the plant operator in case of leaks andloss of the insulation gas.
As a result of the significant contribution to operational safety
offered by gas-insulated instruments and within the meaningof the sustainable climate protection, many plant operators
already check their gas density monitors on a regular basis.
With the entry into force of the regulation (EU) no. 2024/573
on fluorinated greenhouse gases, under specific conditions

16

these regular checks have become mandatory. For this,
WIKA offers solutions that allow you to check your leakage
detection system even when it is installed. In addition to thegas density monitor with an integrated test port, retrofit valves
are available. They can be installed between the gas tank andthe existing leakage detection system.
This enables simple retrofitting to a system which can becalibrated in the future when installed. The entire check canalso be carried out in form of a service supplied by us whether in laboratory or on-site.

ACS-10The model ACS-10 calibration system is used for fully
automated checking of mechanical leakage detection
systems such as gas density monitors, gas density indicatorsand gas density switches in accordance with regulation(EU) no. 2024/573 on fluorinated greenhouse gases.
Article 5 of this EU regulation provides for the mandatory
checking of the leakage detection system at least every
6 years if it contains more than 20,5 kg [45 lbs] SF₆ gas (foralternative gases 500 t CO2 equivalent or more) in the tankand the plant was installed after 01 January 2017.
In addition to the highly accurate reference sensor systemand the powerful compressor, all the necessary components
required for fully automatic recalibration are integrated in thiscalibration case.

The large touch display enables easy configuration of the test
parameters, explains the test process step by step andenables clear management and viewing of historical test
results.
In conjunction with gas density monitors with a premounted
or retrofitted recalibration valve, the easiest of recalibrationsin the field is possible without
dismounting and decommissioning
the electrical system.

Model BCS-10

Connecting parts

The robust modular calibration systemmodel BCS-10 serves for theinspection of SF₆ gas density measuring instruments. Both mechanical andelectronic measuring instruments canbe checked quickly and easily.

WIKA developed special connecting parts in order tocombine a secure checking of gas density monitors andtransmitters with an efficient handling. The self-sealing DN 20
connection ensures a high gas flow during filling andevacuation of the plant and prevents the gas from escaping
unintentionally. With the help of a blocking mechanism, thegas density monitor can be safely disconnected from the gas
compartment. The self-sealing connection for the gas density
monitor prevents any loss of the insulating gas when themeasuring instrument is dismounted.
If the gas density monitors are used in combination with atest connection, the checking can also be carried out when
the instrument is installed.

The combination of the temperature-compensated precision digital gas density indicatormodel GDI-100-D and the test pump allows precise setting of
the measuring point and representation of measured values
in different units. External temperature and pressure fluctuations do not affect the measurement. The calibration systemmodel BCS-10 is delivered in a robust service case made ofplastic.

Service
With the WIKA calibration vans,accredited to DIN EN ISO/IEC 17025,
we can check your instruments directly
on-site. Alternatively, you can also send
your instruments to our calibration &service centre. All operations will be
carried out by certified service technicians.

If no test connection is available on the gas density monitor
or transmitter, this connection can be retrofitted using an
adapter. It will be positioned between the measuring
instrument and the gas compartment. Depending on therequirement, the connection threads can also be changed or
adapted. Due to the integrated shut-off mechanism, theconnection to the gas compartment is automatically interrupted after connecting a recalibration instrument to the test
port and a check can be carried out without dismounting theleakage detection system. After disconnecting the recalibration instrument, the connection to the gas compartment is
automatically reestablished. The checking of the instrument
can be carried out through the connection without dismounting.

17

CONNECTING PARTS
A suitable connection technology is essential for conducting the SF₆ gas or alternative gas from one gas compartment to another without losses and in an efficient manner.
WIKA's connecting parts enable the secure storage andhandling of environmentally hazardous greenhouse gas,among others, in the equipment provided for this. The
connections have been precisely and specifically optimised
for this application.

By using WIKA’s connecting parts, the maintenance-free andreliable separation of gas compartments from the environment is made possible. In this way, not only is the escapeof the insulating gas prevented, but also the ingress ofmoisture.

Manifolds (GMA)
The WIKA manifolds help to significantly increase the efficiency of gas handlingwith service trolleys in GIS plant production or at energy suppliers.
The WIKA manifolds are equipped with three DN 20 connections and one DN 20 or
DN 40 connection on the service trolley as standard.
This makes it possible to fill, evacuate or empty three or more gas compartments atthe same time.
Manifolds

Valves (GCV) and couplings (GCC)
Self-sealing valves and couplings reliably prevent accidental emissions.
The two-stage sealing principle with O-ring and metal contour seal enables safe
connection and disconnection under pressure. The connecting parts are manu­
factured in nominal widths from DN 6 to DN 20. They are manufactured fromhigh-quality aluminium, brass and stainless steel. A material certificate can beprovided on request.
Valves and couplings

18Adapters (GCA), fittings (GCF) and protective
caps (GCP)
In addition to valves and couplings, the standard delivery
program also includes adapters, fittings and protective caps.
WIKA also manufactures customer-specific designs orassemblies according to individual requirements.
Robust design, high-quality materials and full leak testing of
all connecting parts are ensured to provide for long-term andreliable quality.

Adapters and protective caps

Hoses (GCH)
These hoses ensure the safe handling of the insulating gas.
Each hose is fitted with self-sealing couplings and is 100%leak tested. It is thus ensured that no gas can escape into theatmosphere. A distinction is made between rubber hoses andstainless steel hoses.
The rubber hoses are lighter and handier than the stainlesssteel hoses which are more stable and more robust due tothe additional steel mesh.

Product image gas handling hoses

Adapter sets
In addition, there are adapter sets which enable connection
to switches of different manufacturers. The adapters are
made of brass and stainless steel to ensure a long service
life in the field.
Our entire equipment is supplied in robust transport cases
and is thus a perfect companion for service personnel.

Adapter sets for SF6 handling

19

PRODUCT OVERVIEW FORGAS CONNECTING PARTS
Quality through robust design, ideal materials and leak testing
A suitable connection technology is essential for conducting the SF6 gas from one
gas compartment to another without losses and in an efficient manner. Self-sealing
valves prevent the gas from escaping unintentionally. In addition to valves, thestandard delivery program also includes adapters and protective caps. Robust
design, high-quality materials and full leak testing of all connecting parts ensure
long-term and reliable quality.

Model

GQC

GCY

GTP

GMC

Model designation

Gas quick couplingGas cylinder connection

Gas T-pieceGas measuring chamber

Special feature■ Vacuum-resistant■ Vacuum-resistant■ Vacuum-resistant■ Vacuum-resistant■ Tested helium tight-■ Tested helium tight-■ Tested helium tight-■ Tested helium tight-■ Operating■ Operating■ Operating■ Operating■ Leakage rate:■ Leakage rate:■ Leakage rate:■ Leakage rate:

For a fast and reliable
connection, the quick
coupling is particularly suitable for use with
SF6 gas applications.
A selection of different
configurations, including
the common Hansen
HK8, Hansen HK2 andMalmquist/ASEA connections, complete therange

For a reliable connection
to gas cylinders. Available in various sizes andin accordance with thefollowing standards■ DIN 477, No.6
(Europe),■ DIN 477, No.
8 (Europe),■ CGA 590, (USA),■ DIN 477, No. 7 (China)

For a gas-tightconnection with morethan two connections.
Can be customised
to meet the highrequirements for SF6
gas applications.

Mostly used in
combination withtransmitters. Due to theadditional volume in theinterior, the measuring
chamber is particularly
suitable for SF6 gas
measuring methods.

and pressure-tight(-1 … +35 bar)ness of 100 %temperature-40 … +80 °C (EPDM)≤ 1 · 10-5 mbar · l/s

Description

20

and pressure-tight(-1 … +64 bar)ness of 100 %temperature-40 … +80 °C≤ 1 · 10-5 mbar · l/s

and pressure-tight(-1 … +50 bar)ness of 100 %temperature-40 … +80 °C≤ 1 · 10-5 mbar · l/s

and pressure-tight(-1 … +64 bar)ness of 100 %temperature-40 … +80 °C≤ 1 · 10-8 mbar · l/sModelGCV, GCC

GCH

GSH

Model designation

Gas coupling and valve

Gas coupling hose

Gas storage hoseSpecial feature■ The valves can be■ Robust materials■ The valves can be

disconnected or coupled underpressure and vacuum■ Vacuum-resistant and pres-sure-tight (-1 …+64 bar)

■ Vacuum-resistant andpressure-tight■ Tested helium tightness■ Vacuum-resistant andpressure-tight (-1 …+64 bar)

■ Tested helium tightness of■ Tested helium tightness of■ Operating temperature■ Operating temperature■ Leakage rate: ≤ 1 · 10-8 mbar · l/s■ Leakage rate: ≤ 1 · 10-8 mbar · l/s

100 %

100 %

-40 … +80 °C

Description

disconnected or coupled underpressure and vacuum

Self-sealing sping-loaded valve
mechanism / Male thread andfemale thread (union nut) / Also
available as flange connection-40 … +80 °C

Connection between switchgear
and handling equipment or
analytic instrument

–

GMA

GTR

GFA

GCP

Gas manifold

Gas transition pieceGas filling adapter

Gas protective cap■ Vacuum-resistant and■ Vacuum-resistant and■ Vacuum-resistant and■ Tested helium tightness of■ Tested helium tightness of■ Tested helium tightness of

Operating temperature-40 … +80 °C■ Operating temperature■ Operating temperature■ Operating temperature■ Leakage rate:■ Leakage rate:■ Leakage rate:

Manifolds are used to distributeone joint to multiple joints forconnecting multiple chambers
simultaneously.

The transition valve group is
used to connect two joints thatcannot be directly connected.

The correct handling of SF₆
gas is important and requires
the correct components andtools to be used. The filling
adapter enables the safe filling
and refilling of SF₆ gas-filledequipment and systems. Allconnecting parts are a perfect
fit and specially designed forthis application.

pressure-tight (-1 … +64 bar)
100 %-40 … +80 °C≤ 1 · 10-5 mbar · l/spressure-tight (-1 … +64 bar)
100 %-40 … +80 °C≤ 1 · 10-5 mbar · l/spressure-tight (-1 … +64 bar)
100 %-40 … +80 °C≤ 1 · 10-5 mbar · l/s

The protective cap serves toprotect against dirt and damage.

21

GAS ANALYSIS
Discharges during switching operations in plants filled with SF₆ gas or analternative gas lead, over time, to increased concentrations of toxic andhighly corrosive decomposition products.
The formation of decomposition products is dependent on the amount of air andhumidity reactants in the SF₆ or alternative gas during the discharge. These
contaminants (air, humidity and decomposition products) prevent the continued
safe operation of the switchgear.
In particular, the decomposition products strongly attack and corrode the surfaces
within the tank. This progressively reduces the dielectric strength of the insulationmaterials in the switchgear.
The use of gas analysis instruments is absolutely necessary to monitor theconcentration of harmful decomposition products, thus ensuring long-term plantsafety.

22

Formation of decomposition products
With energy input during plant operation, the otherwise stable SF₆ gas decomposes into reactive and corrosive products such
as SF4 and other compounds (see illustration “Formation of decomposition products”).
From the reactants of air and humidity in the gas, further decomposition products are formed.

Without reactant

SF6
SF4 + 2F

Further decomposition
products are built withreactants

O2

H2O
H2O

SOF4

SOF2 + HF

H2O(M = variable for electrode material)

ChemicalMFN

Stability in air

SiF4 + 2H2O

H2O

O2

SO2F2 + HF

End products

SiO2

SO2 + 2HF

Common limit values

Odour[ppmv]
S2F10 disulphur decafluoride

stableSF4, SF6

0.01

acrid

SF4 sulphur tetrafluoride

fast decay

HF, SO2

0.3

acrid, sour

SO2F2 sulphuryl fluoride

stable0.3odourless

SOF4 Thionyl tetrafluoride

stable

SO2F2

0.5

sour

SiF4 Silicon tetrafluoride

fast decay

SiO2, HF

0.5

pungent

SO2 sulphur dioxidestable1.0

acrid

SOF2 Thionyl fluoride

slow decay

1.5

acrid, pungent

HF Hydrogen fluoride

stable2.0sour

SF₆ sulphur hexafluoride

stable1,000

odourless

HF, SO2

Quality directives
The IEC and CIGRE organisations develop criteria
and limit values for SF₆ gas. These specify the limits at whicha contamination exists, and how the correct handling of theSF₆ gas used in switchgear should be made.

The permissible guideline values are stated in IEC 60480, the“Guidelines for the checking and treatment of sulphur
hexafluoride (SF₆)”.

Maximum concentration of contaminants in SF₆ gas
for reuse (in accordance with IEC 60480):■ Air and/or CF4: 3 %■ Gaseous decomposition products: 50 ppmv

■ Humidity: Dew point:-23 °C (filling pressure < 200 kPa abs.) or-36 °C (filling pressure > 200 kPa abs.)

Colour changes in cast resin samples as a result of decomposition products in
SF₆ gas23

DETECTION INSTRUMENTS
Leakage in switchgear can cause high maintenancecosts and, depending on the size, can quickly become asafety risk. Thus, gas leaks must be pinpointed
promptly and reliably and then eliminated.

Leak location
GIR-10 2,000 ppmv
The GIR-10, with a measuring range of 2,000 ppmv isthe ideal measuring instrument for locating the leakon-site and to make a quantitative measurement of it.
Thus specific repair measures can be taken. The leaklocation using infrared spectroscopy is neither distorted byhumidity or common volatile organic compounds, nor bywind.

Emission monitoring
GA35 SF6 monitor
Stationary measuring instrument for the monitoring of
the concentration of SF₆ gas in the ambient air toguarantee occupational safety in enclosed spaces.
The instrument continually checks the room air with anon-dispersive infrared sensor. Via a high-volume alarm,
there is an immediate warning of any hazardous gas
concentrations in the air. Usually, samples are taken
continuously, close to gas tanks or gas-insulated switchgear,from which large quantities of SF₆ gas could escape within ashort period of time.

24

Infrared technology measurement principle
Non-dispersive infrared technology

Infrared source

Sample gas chamber

Wavelength filter

Infrared detector

2,500 cm−1

The Lambert–Beer law
Α = −lg Φ = ε ∙ c ∙ lΦ0Infrared ray
Φ0

A: Absorption

Φ: 	Light intensity after absorption ofSF₆ gasΦ0: Light intensity without absorption

Infrared rayΦ947 cm−1ε:c:Extinction coefficient
Concentration

l: 	Length of the irradiated chamber(sample gas chamber)

25

PRODUCT OVERVIEW FORGAS ANALYSIS
Quality measurement

Model

GA11 SF₆ in N2 /CF4

GA11 C4-FN gas mixture in CO2

GA11 N2 in SF₆/He

Model
designation

Analytic instrument for SF₆ gas

Analytic instrument for C4-FN gas
mixturesAnalyser for nitrogen

Parameters

Frost point/Dew point
SF₆ percentage
SO2, HF, H2S

Frost point/Dew point
C4-FN gas mixtures in CO2
Percentage O2

Frost point/Dew point
N2 percentage, O2
Helium in nitrogen
SF₆ in nitrogenSpecial features■ SF₆ quality measurement with

■ C4-FN gas mixtures quality■ Nitrogen quality measurement

pump-back function■ Battery/mains operated

Data sheet

SP 62.11

Accessories

Model

GA45

Model
designation

SF₆-Recovery-Bag
Gas recovery bag

Parameters–

Special features■ Space-saving as foldable■ 110 l capacity■ Overpressure safety

Data sheet

26

SP 62.08

measurement with pump-backfunction■ Battery/mains operated

SP 62.11

with pump-back function■ Battery/mains operated

SP 62.11

Leak location/leak test

Model

GIR-10

GPD-1000Model
designation

SF₆-IR-LeakSF₆ detection instrument

Parameters

0 … 50 ppmv
0 … 2,000 ppmv–

Special features■ Non-dispersive infrared sensor■ Based on the negative corona■ Portable battery-operated in-strument■ Switchable to leakage rate

principle■ Portable battery-operated in-strument■ Adjustable sensitivity■ Acoustic signal

Data sheet

SP 62.02

SP 62.18

Emission monitoring

Model

GA35

Model
designation

SF₆-IR-Monitor

Parameters

0 … 2,000 ppmv

Special features

Non-dispersive infrared sensor

Data sheet

SP 62.06

27

FILLING AND HANDLINGEQUIPMENT
Filling and handling equipment for SF₆ gas are the central tools for the maintenance of gas-insulated equipment. Both for the installation as well as for the
maintenance of gas-insulated equipment in power transmission and distribution,
WIKA delivers the complete product range of efficient filling and handlingequipment.
The core processes are the evacuation, initial filling, extraction, gas preparation
and refilling of SF₆ equipment. Furthermore, the instruments support the plant
operator with the recording of the SF₆ gas volumes and emissions, as is prescribedin the F-gas regulation (EU), no. 2024/573, for specified equipment.
WIKA is a specialist for safe SF₆ gas handling and simple user guidance which isespecially reflected in the products of the fully automatic series GPU-x-x000.
The motto: Simple and intuitive for more safety!

Criteria for plant definition
1. How much SF₆ gas should be transferred and in whattime?

1. Air flow or mass flow

2. Which storage vessel should be installed?

2. External storage vessel

3. What are the accessibility and connection possibilities at thegas compartment?

3. Hose lengths and connecting parts

4. Which operating concept?

4. Automatically programmed control or manual control

5. Into which region will the plant be delivered?

5. Applicable standards

6. Where will the plant be used?

6. Indoor or outdoor switchgear

In accordance with the above definition, WIKA can offer standard plants or – with special processes and further definition –engineer special plants.
28

SF6 service equipment

GPU-x-2000, GPU-x-3000

GPU-B-2000

GPU-S-2000

GPU-B-3000

GPU-S-3000









Intuitive operation by means of a10" IntelliTouch touchscreen









Fast SF₆ gas
recovery for largegas compartments

















Fully automatic operation

SIL2 | PLd
Additional SIL 2safety control with
SF₆ gas warning device
IEC 61508 / IEC 61511

SIL2 | PLd
Safety at WIKA
Safety for people and the environment is the highest priority
of WIKA. Preventing or detecting emission of the SF₆ gas
during handling and ensuring safe operation is of the utmost
importance not only for reasons of climate protection, butalso because of personnel safety.
The aim is to provide a safe system that limits emissions to aminimum and at the same time almost excludes any faults inapplication.

IEC 61508 / IEC 61511

WIKA is the only provider of SF₆ handling equipmentwith a safety control in accordance with SIL 2 / PL d.
This unique safety concept is an integral part of the
GPU-S-x000 series. Therefore, errors during handling andthe resulting emission of SF₆ to the atmosphere aretechnically impossible.

29

GFK-10 are portable filling kits which allow filling and refilling of the SF₆ gas plants directly from a gas cylinder.
The GFU08 series of modular gas cylinder transport carts are used for the filling and refilling of SF6 gas in the required gas
compartment. The modular design enables worldwide application through the various mechanical and electrical connections.
The model GPU-10 SF₆ service equipment has been developed specifically for the mobile operation of SF₆ gas-filled plants.
Through the handy dimensions and the rubberised tyres, the SF₆ service equipment can be moved easily to different locations.
The GPU-10 can be used for the filling, cleaning, recovery, evacuation and venting of SF₆ gas-filled switchgear and other SF₆
gas-filled equipment. The individual components, such as the SF₆ transfer unit can easily be removed from the equipment andbe operated individually. This modular design ensures easy and flexible transport.

Gas handling equipment

Model

GFK

GFU08

GPU-10GPU-x-x000

Model
designation

Gas filling kit

SF₆ filling cart

SF₆ handling and filling
equipment

SF₆ handling and filling
equipment

Process

Gas fillingGas filling and evacuation

Gas handling

Automatic gas handling

Description

High quality for safe
handling. The correct
handling of SF₆ gas isimportant and requires thatthe right components andtools are used. The GFK-10
filling kit enables the safe
filling and refilling of SF₆
gas-filled equipment andsystems.
All connecting parts
are precision-fit andspecially designed for thisapplication.

The filling cart model
GFU08 enables simple andcomfortable transport of
the gas cylinders to the siteof operation. The desired
target pressure can be set
using a pressure reducer.
An optionally available
balance allows the user tocheck the transferred SF₆
gas volume.
A wide range of optionallyavailable vacuum pumps
allows you to evacuate airfrom the gas compartment
before filling it with SF₆.

The GPU-10 can be used
for the filling, cleaning,recovery and venting of
SF₆ gas-filled equipment.

The WIKA-GPU-x-x000
platform offers the highest
level of comfort due toease of operation and low
maintenance effort.

Easy handling

The individual components
can easily be removed
from the equipment and be
operated individually. This
modular design ensureseasy and flexible transport.

For filling or refilling, therequired filling pressure
is set on the pressure
reducer. The filling hose
is connected to theequipment via the selfclosing valves.
The pressures can bechecked via the twopressure gauges andregulated via the pressure
reducer.

Data sheet

30

SP 61.20

In fully automatedprocesses, the mainfunctions include filling,
extraction and cleaning of
SF₆ gas, evacuation andfilling of switchgear, linear
accelerators and other SF₆
gas-filled equipment. This
plant can also be easily
consolidated with SF₆ gas
cylinders and tanks.
Optional and unique in themarket is the additional SIL
2 safety control which, in
addition to the redundantpressure and weightmeasurement system,
also includes a SIL 2 SF₆
gas sensor, thus making
it impossible for larger
amounts of SF₆ to be
emitted unnoticed.

SP 63.08

SP 60.25

SP 63.16

Gas handling equipment

Accessories

GAD-2000

Model

GPF-10

GWS-10Automatic SF₆ dehydration during
operation of the switchgear

Modeldesignation

Portable SF₆ filter unit

Portable SF₆ gas cylinder
scale

Drying/Filtering

Process

Filtration

Determining the transferred
SF₆ gas mass

The gas dehydration system,
model GAD-2000, can reduce thehumidity content of SF₆ gas-filledequipment.

Description

Filtering out ofparticles, humidity anddecomposition products

Measuring the gas cylinder
weight before and after thefilling/extraction

Data sheet

SP 63.11

SP 63.09

It takes the gas out, dries it
independently and fills it back to
the gas compartment. The double
safety system consisting of an
implemented SIL 2 safety control
and a status query of the gas
density monitor enables a risk-free
and trouble-free execution during
the operation of the switchgear.

SP 63.14

31

Product characteristics GAD-2000■ Ensuring system safety through a double safety system. Continuous checkingof monitoring instrumentation from the gas compartment, plus an additionallyimplemented SIL 2 safety control■ Efficient reduction of maintenance costs and plant downtime on SF₆ gas-filledequipment through gas dehydration during plant operation■ Use of two parallel filters (model GPF-10) for high water absorption capacities■ Oil-less compressor■ Oil-less vacuum compressor■ Low maintenance effort■ Easy and intuitive operation via 7" touchscreen

Automatic gas dehydration with the GAD-2000

GAD-2000

Instrumentation
Gas compartment monitoring

Particle filter
Vacuum compressor
SF6 filter
Compressor

Safety module(automatic gas
compartment isolation in
the event of error)

Gas-insulated
switchgear
LegendSF6 removal

Storage tankSF6 filtering

SF₆ recirculation

Information flow

Image source: ©mathisa - Fotolia.com

32

SF6 filter

Moisture in SF6 gas-filled equipment – theroot of all evil

Everything at a glance, thanks to GSM datatransfer

In medium and high-voltage switchgear of the electricity grid
operators, the gas acts as an extremely efficient insulation
medium and operates as the arc quenching during theswitching process. Pure SF₆ gas provides the ideal solution
due to its high dielectric strength and its ability for recombination.

The GAD-2000 can be equipped, optionally, with a GSM
module for data transfer to the mobile device of the operator.
For example, information regarding the estimated remaining
time of the process or the current humidity values in the gas
compartment, as well as information on necessary service
operations, such as a filter replacement, are transmitted.
Thus, after commissioning, the user can leave the instrument
to operate independently and look after other tasks, even at
different locations.

The reality is usually different, since absolutely pure SF₆ isfound in very little SF₆ gas-filled equipment. Depending on
the amount of reactants present, with humidity occurring themost frequently, following energy input, highly toxic decomposition products are formed. These decomposition products
attack the surfaces of tanks and cause them to corrode.
Furthermore, they increasingly reduce the dielectric strengthof the insulation materials in the switchgear.

Act in time, without downtimes - gas
dehydration of assets during operation
The gas dehydration system, model GAD-2000, enables you
to reduce the humidity content in your SF₆ gas-filledequipment. The unit takes the gas out of the compartment,
dries it independently within the machine and fills it back to
the gas compartment. Due to the double safety system,
consisting of implemented SIL 2 safety control as well as theprocessing of the signals from the gas compartment monitoring instrumentation, it is possible to carry this out without
risk and trouble-free during continuous operation.

33

PARTIAL DISCHARGE AND
TEMPERATURE MONITORING
FOR MV SWITCHGEAR
Dealing with unexpected switchgear failures and costly
maintenance can be a major challenge. Field experience
shows that approximately 75 % of breakdowns can beprevented through early fault detection, significantly reducing
maintenance costs and intervals. Our solution enhances thesafety, efficiency, and longevity of medium-voltage switchgears. SENSeOR addresses these issues using the latest

surface acoustic wave and ultra high frequency sensor
technologies, integrated into an advanced IIoT platform. The
solution monitors temperature and partial discharges withwireless, batteryless sensors, protecting your equipmentfrom overheating and failure. Designed for installation within
metallic AIS & GIS switchgear cabinets and compliant withIEC 62271

Operating principle of partial discharge and temperature monitoring+
Signal from a PD event andtemperature sensors

PD event

The UHF signal generated by the PD event and from the temperature sensor (surface acoustic wave – piezoelectric substrate)
are captured by the antennas and then analysed by the IIoT platform.

34

AMS01 - Reader

The AMS01 reader is dedicated to monitoring electricalequipment like switchgear. The temperature of live conductors is measured by SAW wireless, batteryless sensors toprevent overheating and overload.
Partial discharges are measured by antenna pairs to prevent
equipment failure. Ambient temperature and humidity canalso be measured through an environmenta sensor wired to
the reader.
The reader is intended to be installed in low-voltage compartments of switchgear or in similar type of assets. It can also be
installed in a weatherproof environmental enclosure.

AN-F1 - Antenna

AN-F1 antennas with various cable lengths are dedicated toswitchgear monitoring by measurement using TSAEV11
temperature sensors and partial discharge detection and areconnected to the AMS01 reader.

TSA-EV11 – Temperature sensor

TSA-EV11 sensors are passive SAW temperature sensors
dedicated to switchgear monitoring. They measure thetemperature of live conductors and prevent overheating andoverload.

EXT-ENV-SENS – Environmental sensor

Dedicated to switchgear monitoring, the EXT-ENV-SENS
sensor for ambient temperature, relative humidity and dew
point is wired to the reader (AMS1) to complement the partial
discharge data.

35

WEGRID ASSETPROTECTION – EVERYTHINGFROM ONE SOURCE“Everything that can be digitalised will be digitalised.”— Carly Fiorina, former CEO HP.
In the realm of SF₆ gas-filled systems, this adage holds
true.
WEgrid Solutions is dedicated to safeguarding people,
machinery, and the environment in the power transmission
industry. A pivotal step in achieving this mission is thedigitalisation of gas monitoring.
WEgrid Asset Protection: the solution
Our comprehensive approach provides intelligent solutions to
our customers. With over 40 years of experience in the SF₆
gas industry and an innovation-driven expert team, WEgrid
Asset Protection offers a turnkey concept.

36

Online monitoring for SF₆ gas
At the heart of WEgrid Asset Protection lies online monitoringof the insulating gas in your SF₆ gas-filled plant. Our cutting-edge sensors continuously communicate with a data
centre. This centre analyses transmitted values and promptly
alerts you in case of leaks or increased humidity in theinsulating gas. You can also access these values directly
whenever needed.
Looking ahead with intelligent algorithms
But that’s not all. Our intelligent system acquaints itself withyour plant. Specially developed algorithms adapt to each gas
compartment and calculate reliable trends from themeasured data, allowing you to proactively address issues.
The motto here is clear: Act rather than react. This transition
from time-based maintenance to condition-based maintenance ensures optimal performance.

37

System architecture

Solution 1

Solution 2

Cloud
dashboard
IIoT platform with analytics

ServerDashboardIntelligent algorithms(data analysis)

Gateway with LTE

SCADA

On-premise serverwith analytics anddashboard

Gateway with Ethernet IEC 61850

ororModbus®

Modbus®
Sensors and mech.
connections

38

Customer specific electrical asset

Sensors and mech.
connections

On-prem or cloud-based
Whether you choose an on-premise solution integrated into your existing IT infrastructure and SCADA system or opt for directconnection to our WEgrid cloud via a web application, WEgrid Asset Protection ensures the shortest project lead time andmaximum flexibility. Regular updates of new features are also part of the subscription package.

Products
Our digital sensors are the foundation of WEgrid Asset
Protection. They measure, reliably and continuously, allimportant gas parameters.
Thanks to WIKA's extensive portfolios of adapters, thesetransmitters can be used almost anywhere and are also
suitable for retrofitting.

Data information

Intelligence

Measured values can, with the aid of common industrial
protocols (e.g. IEC61850 or DNP3), be fed directly into yourSCADA system for further processing.

Our algorithms constantly analyse the measured values for
unusual deviations and detect anomalies. With the help of theinformation obtained, forecasts are made for the future
development of the gas parameters. This enables efficientcondition-based maintenance planning.

Data management
Our online sensors measure the condition of your SF₆ gas atshort intervals. The transmitted values are managed andstored in our system. In addition, the measured values can,with the aid of common industrial protocols (e.g. IEC61850,
DNP3 or OPC UA), be fed directly into your SCADA or ERP
system for further processing.

Visualisation
All historical and live readings and forecasts are graphicallypresented on a digital dashboard. Thus, you always have theperfect overview of the condition of your facilities. In addition,
reports can be created.

Predictive maintenanceIf gas density decreases or humidity content increases, rapid
action is important. Our system informs you in the event ofexceeding limit values and anomalies, even on your mobile
device.

Engineering and installation
We are a reliable long-term partner for you. We will take careof planning and implementation of your digitalisation project
and assist with our advice. Our expert team commissions our
products and the entire system on-site at your premises.

We appreciate individuality of our customers and their wishes. That is why we offer flexible models of ourconcept and we will be glad to advise you about possible module combinations.

39

WIRELESS GAS DENSITYMEASUREMENT
SolutionYour applications

Sensors

Connectivity

Cloud

SoftwareAdded value

GAS DENSITY SENSOR GD-20-W
The model GD-20-W gas density sensor utilises highaccuracy sensor technology with a wireless LoRaWAN®
output signal. It offers a long battery life, very good long-term
stability and compact design. The sensor calculates gas
density accurately, compensating for pressure changes dueto thermal effects, making it maintenance-free and reliable forvarious applications in closed tanks and electrical equipment.
Due to the integrated battery-powered design, the sensor
requires minimal installation effort and is ideal for retrofit
applications.

LORA, LTE AND 5G NETWORKS
Secure data transmission guaranteed: With mobile technologies such as LTE/5G and LTE-M or LPWAN, there is always
an optimum solution for your specific requirements.
As a founding member of the mioty alliance, WIKA supports
the innovative LPWAN standard and helps customers set up
a private LoRaWAN® network with LORIOT servers or otherhosts.

40

LoRaWAN® is a trademark used under licence from LoRa-Alliance®.

CUSTOMISED DATA PROCESSING
IIoT cloud solution: The WIKA IIoT cloud enables device
management, data acquisition, data storage, and thecreation of an application-specific digital twin. The genericdevice manager detects and decodes data from wireless
instruments – quickly, securely, and reliably. This instrument
data is recorded and stored in the databases in accordancewith the digital twin of the customer system, where it isavailable to the application-specific forecasting algorithms.
With appropriate authorisation, both internal and external
applications, can access this data via a secure API backend
layer.
On-premise IIoT solution: If you prefer a stand-alone solution,
WIKA will install all the necessary components at yourlocation to implement a self-sufficient system. WIKA’s IIoT
cloud and on-premise solutions are continuously improved
and developed to ensure that your valuable data remains
available and protected at all times.

PERFECTLY SCALABLE FOR YOUR
BUSINESSWIKA’s IIoT application solutions help you optimise
processes, increase efficiency and achieve added value.
The applications adapt seamlessly to your individual
requirements and offer:■ An overview of all devices, assets and their digital twins■ Configurable parameters for each instrument■ Adjustable alarms and events■ Intuitive dashboard for data visualisation■ Special presentations for diagnostic and documentation
purposes
No installation required – simply access WIKA’s IIoT cloud
solution via a web browser.

41

TRAINING
Due to the immense climatic effects, SF₆ gas is an
important topic worldwide, on which there is a need foraction to eliminate emissions.
The consequences are governmental controls with therequirement for verification of the SF₆ filling volumes inplants. In the seminars, WIKA informs about the applicable regulations coupled with practical knowledge forthe selection and operation of the right equipment.

We offer many different topics■ Basic understanding■ Rules and regulations■ Emission monitoring■ Density measurement and humidity measurement■ Connecting parts■ Filling and handling equipment■ Analysis■ Detection

42

Certification
EU regulation no. 2024/573 on fluorinated greenhouse gases
replaced the previous (EC) 517/2014 with effect from
12 March 2024. The new regulation limits the validity of thecertificates to 7 years. Until the new implementing regulation
comes into force, by 12 March 2026 at the latest, training willtake place based on regulation 2015/2066.
After the new enforcement regulation has entered into force,
all certificate holders must have taken part in a refresher
course by 12 March 2029. The regulation stipulates training
measures for personnel who carry out work in connection
with sulphur hexafluoride (SF6 gas) and other fluorinatedgreenhouse gases.

As a testing and certification body recognised by theBavarian state office, WIKA offers competence training withsubsequent examination, so personnel can be certified
across all of Europe. The training and certification is carriedout in accordance with the European regulations (EU)2015/2066 as well as the chemicals climate protection
regulation.
Certified WIKA instructors pass on their extensive know-how
for daily, practical application. Among those we train are
installers, service technicians and maintenance personnel.

In particular, this work includes:■ Installation, service, maintenance, repair or shutdown of
gas-insulated electrical switchgear■ Performing leak testing on plants that fall under theF-gas regulation■ Recovery of SF6 gas and other fluorinated greenhouse
gases

43

WEGRID SERVICESWorldwide service network with systemcalibration
To keep your machine and instrument availability at a highlevel, simply have your instrument calibrated in a WIKA
service hub.

Repair service
No matter which continent you are located on, there's always
a local contact person available for repairs.

Spare parts service
Order any spare parts for machines and instruments in aquick and reliable manner, thus increasing your availability ofmachines.

Laboratory analysis of SF6 and alternativegases
Get certainty about the composition of the gases in your gas
compartments and task us with a gas sample analysis.

Consulting
New territory? No problem - we have many years of experience in the area of SF₆/alternative gases and we would bevery happy to handle your concerns.

Digitalisation
Regardless of whether it is a new project or an existing plant.
Enjoy the advantage of solutions from a single source.

Rental and hire service for equipment
We offer you the necessary flexibility – plan when, where andhow long you need equipment to prevent short-term bottlenecks.

Returned goods
If needed, your local contact person will quickly assist you
and support you in organising and expediting the returntransport of the equipment.

44

Laboratory analysis of SF₆ and alternative gases
On-site analysis does not always provide sufficient insight
into the complete composition of the gas in question. To
broaden the perspective and generate additional, empirical
data, we'll go into detail for you.
For the analytics, we have the latest measuring equipment at
our disposal, such as infrared spectrometers, gas chromato-graphs and a scanning electron microscope with elemental
analysis.
The various analyses are performed in accordance with therelevant standards such as IEC 60376 and IEC 60480.
Various laboratory areas are certified in accordance withIEC 17025.

Our extensive range of services includes:■ Analysis of SF₆ for decomposition products and impurities■ SF₆ gas composition■ Analysis of C4-FN gas mixtures in matrix N2 and CO2 for decomposition products and impurities■ Gas composition of C4-FN gas mixtures in matrix N2 and CO2■ Analysis of C5-FK gas mixtures in matrix N2 and CO2 for decomposition products and impurities■ Gas composition of C5-FK gas mixtures in matrix N2 and CO2■ Analysis of dry and synthetic air for decomposition products and impurities■ Gas composition of dry and synthetic air■ Determination of the gas moisture by means of different technical procedures which correspond to the usual standards
and are based on P2O5 phosphorus pentoxide, chilled mirror as well as capacitive and optical measurement
procedures.
The use of this service requires a gas sample shipment to
All services described above include the delivery of an
the nearest gas laboratory. Depending on duration of
official test report stating the declared measurement
accuracies (and detection limits). If we detect the generation/ customs and transport handling, a reaction of the morereactive decomposition products may occur.
formation of solids in your gases, we can also extend therange of services offered to include solids analysis using ascanning electron microscope (SEM).

45

FACTS ABOUT SF₆ GAS
SF₆ gas: the strongest known
greenhouse gas
In the atmosphere, SF₆ gas is undesirable due to its
high global warming potential and it was listed, alongwith five other gases, in the Kyoto Protocol.
Its climatic impact is 24,300 times greater than that of carbon
dioxide, and its residence time in the atmosphere is approximately 3,200 years. Worldwide there are strict regulations
that demand emission reductions in SF₆ gas.
In the EU, the F-gas regulation, (EC) no. 517/2014 on thelimitation of greenhouse gas emissions, came into force in
2014. In this, the general requirements for the specifichandling of SF₆ gas and other fluorinated gases (F-gases)
were established. The updated regulation 2024/573 wasreleased in February 2024.

Model of a sulphur hexafluoride molecule(one sulphur atom bound with six fluorine atoms)

Gas losses on a component filled with SF₆ gas are both anenvironmental problem as well as a safety risk, with theassociated production or plant shutdown and/or costly
service call-outs.
In Germany, the producers of SF₆ gas and the manufacturers
and operators of gas-filled switchgear have thus joined forces
and signed a voluntary undertaking including emission limits.
The current state of the art for SF₆ gas-filled equipment ismature and is constantly evolving to take account of climaterelated problems.

Applications■ For over 50 years in various segments of industry■ Switchgear and switch-disconnectors in electricity
transmission and distribution■ Particle accelerators■ Radar systems■ X-ray equipment■ MRI instruments

Characteristics■ Chemical name: Sulphur hexafluoride■ Colourless, odourless, non-toxic, non-flammable,chemically inert■ High dielectric strength, almost 3 x higher than air or
N2■ Climate-effecting CO2 equivalent: 24,300■ Lifetime in the atmosphere: 3,200 years

46

In medium and high-voltage switchgear of the electricity
grid operators, the gas acts as an extremely efficientinsulation medium and operates as the arc quenching
during the switching process.
The gas provides the ideal solution due to its highdielectric strength and its ability for recombination.
Due to its superior properties in comparison with othermedia, such as air or nitrogen, plants can be built withmuch more compact dimensions.

MILESTONES IN THE T&DFOCUSED DIVISION AT WIKA
1976 Introduction of the first gas density monitor withtemperature compensation

2016 Market launch of the new generation of groundbreaking handling instruments

1992	The first generation of “Online Monitoring” with a gas
density transmitter2017 Renaming the company division to WEgrid Solutions
and extension of the portfolio with WEgrid Asset
Protection

2000	Introduction of the first gas density indicators, gas
density switches and gas density monitors for
medium-voltage systems
2005	Introduction of the second generation of “Online
Monitoring” with a gas density transmitter with fieldcase2009 Acquisition of the SF₆ division of the gas analysis
specialists G.A.S. in Dortmund
2010 Extension of the portfolio with valves and gas handling
instruments
2013 Introduction of digital SF₆ condition transmitters of the“Smart Grid” generation
2015	Recognition as testing and certification body for
personnel certification in the handling of SF₆2020 Market launch of the first gas density monitor withreference chamber and display of the full measuring
range on a 100-mm dial	Market launch of compact and future-oriented smart
grid gas density transmitters for SF₆ gas and alternative gas applications
2022 New edition and market launch of the hybrid gas
density monitor series with bimetal and referencechamber compensation for highly accurate online
monitoring	Market launch of a fully automated calibration systemfor checking mechanical leakage detection systems
such as gas density monitors, gas density indicatorsand gas density switches in accordance with regulation (EU) no. 2024/573.
2023 Integration of the French company SENSeOR and its
solution for partial discharge and temperaturemonitoring of medium-voltage switchgear into the
WIKA Group47

WIKA worldwide
EuropeAustria
WIKA Messgerätevertrieb
Ursula Wiegand GmbH & Co. KG
Tel. +43 1 8691631
info@wika.at / www.wika.at
Benelux
WIKA Benelux
Tel. +31 475 535500
info@wika.nl / www.wika.nl
Bulgaria
WIKA Bulgaria EOOD
Tel. +359 2 82138-10
info@wika.bg / www.wika.bg
Croatia
WIKA Croatia d.o.o.
Tel. +385 1 6531-034
info@wika.hr / www.wika.hr
Denmark
WIKA Danmark A/S
Tel. +45 4581 9600
info@wika.as / www.wika.as
Finland
WIKA Finland Oy
Tel. +358 9 682492-0
info@wika.fi / www.wika.fi
France
WIKA Instruments s.a.r.l.
Tel. +33 1 71 68 10 00
info@wika.fr / www.wika.fr
Germany
WIKA Alexander Wiegand SE & Co. KG
Tel. +49 9372 132-0
info@wika.de / www.wika.de
Ireland
WIKA Instruments Ireland Limited
Tel. +35 386 1449 360
info@wika.ie / www.wika.ie
Italy
WIKA Italia S.r.l. & C. S.a.s.
Tel. +39 02 93861-1
info@wika.it / www.wika.it

Poland
WIKA Polska spółka z ogranizoną
odpowiedzialnością sp. k.
Tel. +48 54 230110-0
info@wikapolska.pl
www.wikapolska.pl
Romania
WIKA Instruments Romania S.R.L.
Tel. +40 21 4048327
info@wika.ro / www.wika.ro
RussiaAO “WIKA MERA”
Tel. +7 495-648018-0
info@wika.ru / www.wika.ru
Serbia
WIKA Merna Tehnika d.o.o.
Tel. +381 11 2763722
info@wika.rs / www.wika.rs
Spain
Instrumentos WIKA S.A.U.
Tel. +34 933 9386-30
info@wika.es / www.wika.es
Switzerland
WIKA Schweiz AG
Tel. +41 41 91972-72
info@wika.ch / www.wika.ch
Türkiye
WIKA Instruments
Eayel Ölçüm Cihazları Tic. Ltd. Şti.
Tel. +90 216 41590-66
info@wika.com.tr
www.wika.com.tr

North America

Asia

Africa/Middle East

Canada
WIKA Instruments Ltd.
Tel. +1 780 4637035
info@wika.ca / www.wika.ca

China

Botswana

USA
WIKA Instrument, LP
Tel. +1 770 5138200
info@wika.com / www.wika.us
Gayesco-WIKA USA, LP
Tel. +1 713 4750022
info@wikahouston.com
www.wika.us
Mensor Corporation
Tel. +1 512 3964200
sales@mensor.com
www.mensor.com
Latin America
Argentina
WIKA Argentina S.A.
Tel. +54 11 5442 0000
ventas@wika.com.ar
www.wika.com.ar
Brazil
WIKA do Brasil Ind. e Com. Ltda.
Tel. +55 15 3459-9700
vendas@wika.com.br
www.wika.com.br
Chile
WIKA Chile S.p.A.
Tel. +56 9 4279 0308
info@wika.cl / www.wika.cl

UkraineTOV WIKA Prylad
Tel. +38 044 496 83 80
info@wika.ua / www.wika.ua

Colombia
Instrumentos WIKA Colombia S.A.S.
Tel. +57 601 7021347
info@wika.co / www.wika.co

United Kingdom
WIKA Instruments Ltd
Tel. +44 1737 644-008
info@wika.co.uk / www.wika.co.uk

MexicoInstrumentos WIKA Mexico S.A. de C.V.
Tel. +52 55 50205300
ventas@wika.com / www.wika.mx

WIKA Instrumentation Suzhou Co., Ltd. WIKA Instruments Botswana (Pty.) Ltd.
Tel. +86 512 6878 8000
info@wika.cn / www.wika.com.cn

Tel. +267 3110013
info@wika.co.bw / wika.co.bw

India
WIKA Instruments India Pvt. Ltd.
Tel. +1800-123-101010
info@wika.co.in / www.wika.co.in

Egypt
WIKA Near East Ltd.
Tel. +20 2 240 13130

Japan
WIKA Japan K. K.
Tel. +81 3 5439-6673
info@wika.co.jp / www.wika.co.jp
Kazakhstan
TOO WIKA Kazakhstan
Tel. +7 727 220 80 08
info@wika.kz / www.wika.kz
Korea
WIKA Korea Ltd.
Tel. +82 2 869-0505
info@wika.co.kr / www.wika.co.kr
Malaysia
WIKA Instrumentation (M) Sdn. Bhd.
Tel. +60 3 5590 6666
info@wika.my / www.wika.my
Philippines
WIKA Instruments Philippines Inc.
Tel. +63 2 234-1270
info@wika.ph / www.wika.ph
Singapore
WIKA Instrumentation Pte. Ltd.
Tel. +65 6844 5506
info@wika.sg / www.wika.sg
Taiwan
WIKA Instrumentation Taiwan Ltd.
Tel. +886 3 420 6052
info@wika.tw / www.wika.tw
Thailand
WIKA Instrumentation Corporation(Thailand) Co., Ltd.
Tel. +66 2 326 6876
info@wika.co.th / www.wika.co.th

info@wika.com.eg / www.wika.com.eg
Namibia
WIKA Instruments Namibia Pty Ltd.
Tel. +26 4 61238811
info@wika.com.na / www.wika.com.na
Nigeria
WIKA WEST AFRICA LIMITED
Tel. +234 17130019
info@wika.com.ng / www.wika.ng
Saudi Arabia
WIKA Saudi Arabia LLC
Tel. +966 53 555 0874
info@wika.sa / www.wika.sa
South Africa
WIKA Instruments Pty. Ltd.
Tel. +27 11 62100-00
sales@wika.co.za / www.wika.co.za
United Arab Emirates
WIKA Middle East FZE
Tel. +971 4 883-9090
info@wika.ae / www.wika.ae
Australia
Australia
WIKA Australia Pty. Ltd.
Tel. +61 2 88455222
sales@wika.com.au / www.wika.com.au
New Zealand
WIKA Instruments Limited
Tel. +64 9 8479020
info@wika.co.nz / www.wika.co.nz

Uzbekistan
WIKA Instrumentation FE LLC
Tel. +998 71 205 84 30
info@wika.uz / www.wika.uz

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WIKA Alexander Wiegand SE & Co. KG
Alexander-Wiegand-Straße 30 | 63911 Klingenberg | Germany
Tel. +49 9372 132-0 | info@wika.de | www.wika.de

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