Gas-insulated switchgear
from 72.5 to 800 kV
Excellent systems that create lasting value
siemens.com/energy
Answers for energy.
Siemens 8DN8 switchgear for up
Siemens 8DN9 GIS for 245 kV combines the
to 170 kV is characterized by modular advantages of single-phase and three-phase
design and excellent flexibility.
encapsulation.
Outstandingly compact, Siemens 8DQ1 GIS
handles 420 kV at 63 kA with a single interrupter unit.
Long-standing excellence
that delivers results
The energy system is undergoing fundamental change for various reasons. The
situation calls for efficient and reliable
solutions that help save costs and at the
same time tackle the new challenges
that the process of change poses.
Siemens has long anticipated these
changes. As early as 1968 the company
introduced a solution that helps deal
with the increasing shortage of space
in urban areas and the need for power
transmission at higher voltage levels
right into city centers: gas-insulated
switchgear (GIS).
The GIS concept soon turned out highly
successful, and immediately set new
­standards in terms of performance and
reliability. Ever since, Siemens GIS have
played a central role in supplying power
safely, worldwide.
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Today, Siemens has installed more than
28,000 indoor and outdoor switch bays
worldwide, and well over 300,000 bayyears of operation have been recorded.
Siemens supplies GIS for rated voltages
from 72.5 kV up to 800 kV. The comprehensive product range, comprising
the 8DN8, 8DN9, 8DQ1, and 8DR1 types
of switchgear, holds ideal solutions for
all indoor and outdoor switching appli­
cations up to the highest performance
rates. All Siemens GIS meet the highest
requirements in terms of efficiency,
safety, and reliability. They have been
designed for outstanding compactness
and flexibility to meet today’s challeng-­
ing demands.
Siemens 8DQ1 switchgear for up to 550 kV provides superior performance for demanding transmission applications.
An economical solution throughout
Siemens GIS have been designed with
economic efficiency in mind. This pays
off during the entire life cycle of the
switchgear and ensures a number of
benefits.
All switchgear arrangements can be
assem­bled from a relatively small number
of well-conceived high-quality modules.
This makes it possible to meet all individual requirements while ensuring userfriendliness and easy operation.
Moreover, Siemens GIS are outstandingly
compact. Take the 8DN8 switchgear for
voltages up to 145 kV, for example: it is
one of the world’s most compact GIS and
­features a bay width of only 0.8 meters
and a control cubicle that is integrated
in the bay. The com­pact bay design
­lowers more than space requirements:
along with the switchgears aluminum
enclosures, it saves weight, reducing
load on foundations and building floors,
and, consequently, associated investments costs.
During operation, Siemens GIS are
­practically maintenance-free. They are
built for an estimated service life of
more than 50 years. No wonder, then,
that the world’s first Siemens GIS bays,
which were installed in Berlin in 1968,
are still in operation. All new Siemens
GIS types come with non-corrosive
en­closures and self-lubricating motor
drives that ensure a long service life.
The main contacts of circuit breakers,
­disconnectors, and grounding switches
are designed for long service life with
minimal maintenance. The first major
inspection is recommended to take
place after 25 years.
Your benefits:
Proven switchgear solution
from one of the world’s
leading suppliers with outstanding experience
Outstanding flexibility in
­switchgear arrangement
Little space requirement
Easy, efficient, and reliable
operation
Low life cycle costs
Virtually maintenance-free
­operation for an expected lifetime of more than 50 years.
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4
Siemens high-voltage switchgear systems perform
reliably in extreme environmental conditions.
A common design principle of all Siemens GIS is
Siemens GIS are ideally suited for
that compactness must not compromise accessibility. use in urban areas.
Proven reliability
that ensures maximum safety
Every switchgear in the Siemens 8D type
range has been thoroughly optimized
for easy operation, accessibility, safety,
and dependability. This ensures that
­Siemens GIS can always be operated
­efficiently and reliably. The functional
principle of the switchgear has been
­carefully designed and tested, and it has
stood the test of time during decades
of field operation.
Environmental performance
The external and internal electromagnetic
compatibility of Siemens switchgear prevents interference voltages and overvolt­
ages. The gastightness of Siemens GIS
with its seamless metallic enclosures
exceeds the already stringent standards
and has been verified by vigorous typetesting: the sealing system limits gas
leakage to less than 0.1 percent per
gas compartment per year. Siemens
has developed outstanding expertise in
the handling of SF6 gas and can ensure
that no gas is released during production,
maintenance, and recycling. Moreover,
the development of increasingly compact
switchgear entails a constant reduction
of the required amount of gas.
Operational safety
Siemens GIS exceed the relevant IEC
safety standards thanks to extraordinarily
high mechanical stability, high resistance
to arcing, and outstanding gas safety
­features. This means that Siemens GIS
ensure the highest possible degree of
personal safety and can even be installed
in commercial and residential buildings.
Your benefits:
Proven functional principle
Outstanding EMC and environmental performance
Seamless metallic enclosure
Unparalleled gastightness
High degree of operational
safety
Safety for operating personnel
due to high safety standards
of the switchgear.
5
Financing support
and consulting
Feasibility studies
Overall project
management
After-sales services
and recycling
Engineering
and design
Site facilities
and civil works
Training
On-site installation
and commissioning
Production
Transport
Procurement
Factory testing
Support and services
that make a difference
Your benefits:
Leading expertise always
available on-site on short
notice
Turnkey project
implementation
Comprehensive range
of ­after-sales services
6
At Siemens, we consider close cooperation with our customers right from the
beginning essential to the success of
any project. This is why we ensure that
our experts are always close at hand,
from the initial idea to project implementation and all the way to com­pre­hensive
life cycle services for all our switchgear
types. We have established a global
­production, distribution, and experts
­network with nodes in 150 countries
around the world and more than ten
­dedicated centers of competence worldwide. This tight network makes it possible
to meet all local requirements and to
react on short notice whenever necessary. M
­ oreover, our global production
platform guarantees consistent
worldwide standards.
Support that pays off
Our services provide value added
through constant project-related
support and con­sulting right from the
start – and throughout the entire life
cycle of our switchgear all the way to
­disposal and recycling of old switchgear.
We also assume responsibility for the
entire project on a turnkey basis. In this
case, all our customers have to do
is to turn the key once the switchgear
has been commissioned.
Our broad range of services also comprises all maintenance activities. Our
gas-insulated switchgear does indeed
require very little mainte­nance, but if
and when it should become necessary
to carry out any work, we are on hand
at all times. And, of course, we provide
customized training for operating per­
sonnel to familiarize them with the ins
and outs of our switchgear and make
them com­petent in its use.
Siemens offers support and services far beyond GIS engineering, production, and construction.
­Complete turnkey solutions, services that cover the entire life cycle of a switchgear system and
­dedicated training round out the Siemens high-voltage substation portfolio.
7
Most Siemens switchgear can be shipped as completely assembled bays.
8
Portable power solutions reduce on-site effort.
Trouble-free transportation of pre-assembled
switchgear bays – even on mountain tops.
On-site installation of pre-assembled
transport units.
Transport optimization
that makes installation a breeze
All Siemens GIS types are optimized for
transport and on-site installation. Thanks
to their outstanding compactness, even
larger units for high voltage levels are
still easy to handle. Most switchgear can
be shipped as completely assembled and
tested bays pre-filled with SF6 gas. 8DN8
types are even shipped in standard containers. Up to six single or three double
switchgear bays, completely assembled
and tested, come as a single transport
unit. All goods are packed according to
their specific transport conditions and in
line with conditions and duration of temporary storage.
Installation and commissioning
The well-thought-out transport optimi­
zation significantly reduces the effort
required for installation on-site and
allows easy and rapid installation of the
switchgear with relatively few special
tools. After assembly, the entire switchgear is tested to ensure proper electrical
and mechanical function. All tests are
performed in conformity with IEC and all
other relevant standards, and the results
are documented in the final test reports.
Switchgear on wheels
Offering the highest possible degree
of mobility and flexibility with mobile
high-voltage switchgear mounted on
trailers or within containers, Siemens’
»portable power solutions« are a proven
one-stop option whenever it comes to
providing switchgear in next to no time
and for temporary purposes, as is the
case in disaster areas, for instance.
Your benefits:
Trouble-free, rapid transport
and logistics
Little installation effort and
fast commissioning
Mobile switchgear solutions
for special purposes available
9
Siemens control and protection devices
fully comply with IEC 61850.
A local control cubicle integrated in the GIS bay
reduces space requirements and commissioning time.
Secondary equipment
that protects valuable technology
Continually growing demands on
­sub­station automation entail greater
­complexity and more interfaces. So
high availability and smooth interaction
of all com­ponents are among system
operators’ key requirements. Siemens’
comprehensive choice of control and
­protection ­systems enables perfect
one-stop shop secondary technology
­concepts for high-voltage substations
equipped with ­Siemens GIS.
Only tried and tested Siemens technology
is used for the auxiliary and control
circuits.
High degree of adaptability
The wide range of available Siemens
­control and protection systems makes
possible customized one-stop solutions.
To meet individual requirements, all
­Siemens GIS can also be equipped with
any other commonly available bay and
substation control and protection system
as well as with proprietary systems. Standard switchgear control interfaces enable
the connection to any analog or digital
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control, protection, and monitoring
­system. Additional sensors and interfaces for a wide range of diagnostic
and condition monitoring systems and
purposes are available on request.
Control and feeder protection are usually
installed in a local control cubicle. With
Siemens GIS it may be directly integrated
in the operating panel of the switchgear
bay or located separate from the GIS.
Coded plugs for all wiring ensure easy
installation and prevent cabling errors.
Integration of the control cubicle in the
switchgear bay helps reduce space
requirements and commissioning time.
IEC 61850 compliance
All Siemens GIS control and protection
devices fully comply with the IEC 61850
standard, which has been defined in a
mutual effort of customers and manu­
facturers to create a uniform, non-pro­
prietary, and future-proof basis for digital
substation automation and control
communication.
»Power VT« for 8DN8-type GIS and »core in
air« c­ urrent transformer for 8DQ1-type GIS
­facilitate on-site testing.
Comprehensive monitoring options
Siemens supplies a wide range of monitoring devices that provide important condition data and enable preventive maintenance. This range includes circuit breaker
monitoring (CBM), instantaneous values
of primary and secondary equipment,
cumulative and integral m
­ onitoring of
working stress, and determination of
­circuit breaker properties that may influence its future reliability and operating
behavior.
All gas compartments are constantly
monitored by gas density monitors (GDM)
with integrated indicators. Any deviations
are indicated as soon as they reach the
defined response threshold. Optionally
available density sensors enable remote
indication for gas analysis trends.
A partial discharge monitoring (PDM)
­system according to IEC 60270 can be
provided for integrity assessment of the
substation’s primary insulation and as a
tool for in-­service periodic (portable system) or continuous (online) monitoring.
Phase synchronizing (PSD) and partial discharge
measuring (PD) help increase reliability of the GIS.
Controlled switching for less wear
The Siemens phase synchronizing
device (PSD) minimizes electrodynamic
and dielectric strain of high-voltage
assets by reducing starting current and
over­voltage. This helps prevent wear
and increa­ses the reliability and the life
of the switchgear.
Innovative instrument transformer
New instrument transformers, such as
the »core in air« current transformer for
8DQ1 switchgear, the RC voltage dividers
for all 8D-type GIS, and the new Power
VT for on-site high-voltage testing of
8DN8-type GIS up to 145 kV, enable
­several applications that provide extra
benefits. The Power VT, for example,
helps minimize the risk of SF6 emissions
and con­siderably reduces transport
requirements for testing equipment.
The SIVIS camera system allows
optical control of the switching path.
Your benefits:
Reliable one-stop solutions
for all secondary technology
Customized solutions
available
Safe operation and extended
service life of the switchgear
Full compliance with IEC 61850
Smart solutions for facilitated
on-site testing procedures
Several additional optional systems like
SIVIS provide even more information
about the processes within the switch­­­gear.
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Global expertise in switchgear
making to the highest standards
The Siemens Schaltwerk in Berlin,
­Germany, was home to the production
of the first Siemens GIS back in 1968,
and gas-insulated high-voltage switchgear have been produced there ever
since. Today, however, Siemens GIS production facilities are located in several
countries around the world to ensure
short distances in serving the world’s various m
­ arkets and to contribute to the
­creation of local value added.
In order to meet all quality, reliability,
and performance standards, all production sites have the same comprehensive
quality management system, which has
been certified in accordance with
ISO 9001, and switchgear module
­assembly follows identical work steps
at all production sites. Most parts of
the switchgear, such as electronic
devices, operating mechanisms,
gaskets, and bushings are produced
right at the ­production site, and
all switchgear are assembled according
to meticulously designed processes.
Comprehensive education and training
of all production staff at all production
facilities ensures consistently high
quality and continuous innovation.
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Technical data
at a glance
Switchgear type
8DN8
Rated voltage
kV
up to
145
Rated frequency
Hz
Rated power frequency withstand voltage (1 min)
kV
up to
275
Rated lightning impulse withstand voltage (1.2 / 50 µs)
kV
up to
650
Rated switching impulse withstand voltage (250 / 2,500 µs)
kV
up to
–
Rated normal current busbar
A
up to
3,150
Rated normal current feeder
A
up to
3,150
Rated short-circuit-breaking current
kA
up to
40
(< 3 cycles)
Rated peak withstand current
kA
up to
108
Rated short-time withstand current (3 s)
kA
up to
40
Leakage rate per year and gas compartment
%
Driving mechanism of circuit breaker
(<
< 0.1
stored-energy spring
(common or single pole
Rated operating sequence
O-0,3 s-CO-3 min-CO
CO-15 s-CO
Installation
indoor/outdoor
Standards
IEC/IEEE/GOST
Bay width
mm
First major inspection
years
> 25
Expected lifetime
years
> 50
Other values on request
14
50/60
800
8DN9
170
245
8DQ1
420
50/60
420
8DR1
550
50/60
800
50/60
325
460
650
650
740
960
750
1,050
1,425
1,425
1,550
2,100
–
–
1,050
1,050
1,175
1,425
4,000
4,000
5,000
6,300
5,000
5,000
4,000
4,000
5,000
5,000
5,000
5,000
50
(< 3 cycles)
63
(< 2 cycles)
80
(< 2 cycles)
63
(< 2 cycles)
50
(< 2 cycles)
135
170
216
170
135
50
63
80
63
63
3 cycles)
170
63
drive)
< 0.1
< 0.1
stored-energy spring
(single pole drive)
stored-energy spring
(single pole drive)
stored-energy spring
(single pole drive)
O-0,3 s-CO-3 min-CO
CO-15 s-CO
O-0,3 s-CO-3 min-CO
CO-15 s-CO
O-0,3 s-CO-3 min-CO
CO-15 s-CO
indoor
indoor/outdoor
IEC/IEEE/GOST
1,000
50
< 0.1
1,500
indoor
indoor/outdoor
IEC/IEEE/GOST
2,200
3,600
indoor/outdoor
IEC/IEEE
3,600
4,500
> 25
> 25
> 25
> 50
> 50
> 50
15
Published by and copyright © 2013:
Siemens AG
Energy Sector
Freyeslebenstrasse 1
91058 Erlangen, Germany
Siemens AG
Energy Sector
Power Transmission Division
High Voltage Products
Freyeslebenstrasse 1
91058 Erlangen, Germany
siemens.com/energy/hv-substations
For more information, please contact
our Customer Support Center.
Phone: +49 180 524 70 00
Fax:
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E-mail:support.energy@siemens.com
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are the property of Siemens AG, its affiliates,
or their respective owners.
Subject to change without prior notice.
The information in this document contains
general descriptions of the technical options
available, which may not apply in all cases.
The required technical options should therefore
be specified in the contract.