Siemens 3ES User Manual
3ES Surge Arrester
Metal-enclosed, SF6-insulated for High Voltage Systems up to 800 kV
Answers for energy.
Perfect Fit
Based on more than 80 years of experience in the world market
of surge arresters and a comprehensive portfolio of products for
installations rated up to 800 kV, Siemens has become the preferred
supplier of HV surge arrester technology for utilities, industrial
companies and equipment manufacturers as well as public institutions and consultancies.
Whatever your needs, our surge arresters have a perfect fit in any
installation. Sized to demand at competitive costs, they combine
the right performance with maximum reliability over a long service
live. From overall trouble-free operation to uncompromising safety
demands, such as for gas-insulated switchgear – our 3ES series of
surge arrester has a history of successful applications throughout
the world.
Maximum protection
Siemens gas-insulated, metal-enclosed arresters
(GIS arresters) provide maximum protection for gasinsulated switchgear (GIS) and transformers. The
reasons are twofold: On the one hand, GIS arresters
can be installed very close to the object to be protected, which is important wherever they are fed by
long cables, for instance. In this way, over-voltages
caused by traveling waves can effectively be minimized. On the other hand, the low self-inductance
of GIS arresters provides the best conceivable protection against high rate-of-rise voltages, which
are particularly critical for gas-insulated equipment.
Service experience since 1974
The first Siemens GIS arresters were supplied in 1974.
Since then, they have been designed for an extremely
wide range of different applications, with installations
worldwide. Today, Siemens has extensive know-how
in GIS arrester technology, ensuring optimum operating characteristics and highest reliability.
Single-phase and three-phase configurations
Siemens offers two different series of GIS arresters.
The 3ES2-D, 3ES2-E and 3ES5-H models all feature
an electrical and mechanical single-column design.
The same design is also available for three-phase
configurations (i. e. 3ES5-C three phases per vessel).
2
Gas and electrical monitoring for GIS arrester
In contrast, the 3ES9-J series has a three-column
mechanical and single-column electrical design,
which results in a meandering low-inductance
current path and reduces the overall length of the
arresters.
Ultimate safety
Naturally, all Siemens GIS surge arresters are
equipped with pressure-relief safety diaphragms
and comply with international standards, such as
IEC 60517. By careful choice of materials and paint
structure, all Siemens GIS arresters are suitable for
outdoor installation.
Arrester monitoring
Every GIS surge arrester from Siemens provides a gas
connection. This permits the arrester to be incorporated in an existing gas monitoring system. Alternatively, a separate arrester gas monitor can be provided.
The earthed end of each individual arrester phase is
routed out of the tank through an insulated bushing
which can be used to connect monitoring devices,
such as surge counters, telltale spark gaps or leakage
current meters.
Versatile connection to any GIS system
Siemens GIS arresters permit versatile connection
to any GIS system. Bushings may be of the standard
design or customer specific. Gas-to-gas type bushings
as well as gas-to-oil type bushings for connection
to transformers are available. In addition to standard
connection flanges, special flanges or auxiliary
adapter flanges can also be designed, manufactured
and supplied according to customer requirements.
Simple and economical start-up
Our GIS arresters minimize the time and labor
required for commissioning. The internal mechanical
design of the arresters eliminates the need for transportation retainers and opening the tank, which is
normally undesirable. However, an internal disconnecting piece is provided, permitting dielectric tests
to be performed on the GIS without having to remove
the arrester. Depending on the customer’s requirements, GIS arresters can be installed in suspended,
upright or horizontal positions.
Maintenance-free
Siemens GIS arresters are virtually maintenance-free.
Apart from the usual reading of optional electrical
monitoring devices and the gas monitor, only the
gas humidity has to be checked after ten years, and
only the filter material within the tank has to be
changed after twenty years of service.
3
3ES2-D / E
3ES5-F / G / L
single-phase
(diameter 396 mm)
Access cover with
pressure relief
device and filter
Metal-oxide resistors
Electrical monitoring
devices
SF
-SF6-bushing
6
(Oil-SF6-bushing
on request)
Spring contact
Grading hood
Enclosure
Supporting rods
Gas pressure /
density
monitoring
single-phase
(diameter 710 mm)
Access cover with
pressure relief
device and filter
Metal-oxide resistors
Electrical monitoring
devices
SF
-SF6-bushing
6
(Oil-SF
-bushing
6
on request)
Spring contact
Grading hood
Enclosure
Supporting rods
Gas pressure /
density
monitoring
GIS arresters connected to a 420 kV GIS busbar
Type
Highest voltage for equipment Um [kV]
Max. rated voltage [kV]
Max. nominal discharge current [kA]
Max. line discharge class
Max. thermal energy absorbing capability (per kV of U
) [kJ / kV]
r
Max. long duration current impulse, 2 ms [A]
Max. height [mm]
Max. weight [kg]
4
Loading...