GAS-INSULATED METAL-ENCLOSED
SURGE ARRESTERS (GIS-ARRESTERS)
for the protection of gas-insulated metal-enclosed
switchgear against lightning and switching overvoltages
GIS-Arresters from Siemens
Siemens gas-insulated, metal-enclosed arresters (GIS arresters) provide
optimum protection for gas-insulated switchgear (GIS). Two reasons
are decisive here. On the one hand, GIS arresters can be installed
very close to the object to be protected. This is important for instance
when GIS are fed by long cables. Overvoltages, which can be caused
by travelling wave occurrences, are limited very effectively in this way.
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.
The first Siemens GIS arresters have been supplied in 1974. Since
then, they have been designed for an extremely wide range of
applications and have been installed worldwide. Today, Siemens
possesses extensive know-how concerning GIS arresters, assuring
optimum operating properties and the highest possible reliability.
GIS arresters Type 3EP2 156-3PKZ
for the protection of a gas insulated
123-kV-switch-gear Type 8DN9
(Resonant earthed system, TEAG Jena, Germany)
Siemens supplies two different series of GIS arresters. In the case
of the 3EP2-K type range, the resistors are electrically and mechanically of single-column construction. These arresters are available as
single (i.e. one phase per vessel) or three-phase (i.e. three phases
per vessel) types. In contrast, the 3EP3-K type range incorporates
resistors which are mechanically of three-column while electrically
of one-column design. This results in a meandering low-inductance
current path and reduces the overall length of the arresters.
Common to both type ranges is the fact that they are fitted with safety
rupture diaphragms and of course comply with international regulations
(e.g. IEC 517). By virtue of suitable choice of material and corresponding
paint structure, the Siemens GIS arresters are generally suitable for
outdoor installation.
Every GIS arrester is fitted with a gas connection. This allows the
arrester to be incorporated in an existing gas monitoring system; it
is also possible, however, to provide a separate arrester gas monitor.
The earth-side end of each individual arrester phase is led out of its
tank through an insulated bushing, to which monitoring devices, such
as surge counters, spark gaps or leakage current meters can be
connected.
GIS arresters Type 3EP3 378-4PKZ
at the transformers in a gas insulated
420-kV-switch-gear Type 8DQ1
(BEWAG Berlin, Germany)
Type 3EP2...-3PK (Diameter 392 mm)
up to 150 kV
Nominal system voltage
Highest voltage for equipment U m up to 170 kV
SF6 -SF6 -bushing
(SF6 -Oil-bushing on request)
Spring contact
Access cover with
pressure relief
device and filter
Enclosure
Grading hood
Metal-oxide resistors
Supporting rods
Electrical monitoring devices
Gas pressure/density monitoring
SIEMENS
0000003
0
1
3
>10
i peak mA
SIEMENS
0000003
Arrester Data
Height
Total weight (max.)
Maximum rated voltage U r
Maximum nominal discharge current acc. to IEC 99-4
Maximum classifying current acc. to ANSI/IEEE C62.11
Maximum line discharge class
Maximum energy absorbing capability
Maximum long duration current impulse, 2 ms
Short circuit rating
1060 / 1440 / 1680
275 / 300 / 320
180
20
15
4
10
1200
63
mm
kg
kV
kA
kA
kJ/kV r
A
kA
Type 3EP2...-3PK3 (Diameter 710 mm, three-phase arrester)
up to 150 kV
Nominal system voltage
Highest voltage for equipment U m up to 170 kV
SF -SF -bushing
6
6
(SF -Oil-bushing on request)
6
Spring contact
Enclosure
Access cover with
pressure relief
device and filter
Grading hood
Metal-oxide resistors
Supporting rods
Electrical monitoring devices
(each phase separate)
Gas pressure/density monitoring
SIEMENS
0000003
0
1
3
>10
i peak mA
SIEMENS
0000003
Arrester Data
Height
Total weight (max.)
Maximum rated voltage U r
Maximum nominal discharge current acc. to IEC 99-4
Maximum classifying current acc. to ANSI/IEEE C62.11
Maximum line discharge class
Maximum energy absorbing capability
Maximum long duration current impulse, 2 ms
Short circuit rating
1700
960
mm
kg
180
20
15
kV
kA
kA
4
10
1200
63
kJ/kV r
A
kA
Type 3EP3...-4PK (Diameter 710 mm)
220 ... 345 kV
Nominal system voltage
Highest voltage for equipment U m 245 ... 362 kV
SF6 -SF6 -bushing
(SF6 -Oil-bushing on request)
Spring contact
Access cover with
pressure relief
device and filter
Enclosure
2
3
4
3
Grading hood
6
1
6
5
5
4
2
Metal-oxide resistors
1
Supporting tube
Electrical monitoring devices
Gas pressure/density monitoring
SIEMENS
0000003
0
1
3
>10
i peak mA
SIEMENS
0000003
Arrester Data
Height
Total weight (max.)
Maximum rated voltage U r
Nominal discharge current acc. to IEC 99-4
Maximum classifying current acc. to ANSI/IEEE C62.11
Maximum line discharge class
Maximum energy absorbing capability
Maximum long duration current impulse, 2 ms
Short circuit rating
1610 / 1860
640 / 700
216 / 288
20
20
5
13
1600
63
mm
kg
kV
kA
kA
kJ/kV r
A
kA
Type 3EP3...-4PK (Diameter 900 mm)
Nominal system voltage
Highest voltage for equipment U m
380 / 500 kV
420 / 550 kV
SF6 -SF6 -bushing
(SF6 -Oil-bushing on request)
Access cover with
pressure relief
device and filter
Spring contact
Enclosure
2
Grading hood
3
4
3
6
1
6
5
5
4
2
Metal-oxide resistors
1
Supporting tube
Gas pressure/density monitoring
Electrical monitoring devices
SIEMENS
0000003
0
1
3
>10
i peak mA
SIEMENS
0000003
Arrester Data
Height
Total weight (max.)
Maximum rated voltage U r
Nominal discharge current acc. to IEC 99-4
Maximum classifying current acc. to ANSI/IEEE C62.11
Maximum line discharge class
Maximum energy absorbing capability
Maximum long duration current impulse, 2 ms
Short circuit rating
2115 / 2500
1460 / 1500
378 / 444
20
20
5
13
1600
63
mm
kg
kV
kA
kA
kJ/kV r
A
kA
Optimal operating characteristics and
maximal operational reliability
Siemens GIS arresters permit versatile connection to any GIS system. Bushings may be of the standard
type 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 the standard connection flanges, special flanges or additional
adaptor flanges can also be designed, constructed and provided according to customer requirements.
GIS arresters Type 3EP3 378-4PKZ
at the line entrance of a gas insulated
420-kV-switch-gear Type 8DQ1
(BEWAG Berlin, Germany)
Commissioning is possible with the absolute minimum of time and expense. The internal mechanical
construction of the arresters has been optimized to the effect that no transport braces have to be removed
on site. Opening of the tank, which is usually undesirable, is therefore not necessary. However, an internal
disconnecting device is provided, which allows to perform dielectric tests on the GIS without removing
the arrester. Installation of the GIS arresters is possible, according to customer requirements, either
suspended, upright or horizontal.
Siemens GIS arresters are virtually maintenance-free. Apart from the usual checking of possible electrical
monitoring devices and the gas monitor, it is only necessary to check the gas humidity after ten years
and to change the filter material present in the tank after twenty years of service.
For Further Information
Please fax this page
to the following number:
Name
Fax +49-30-3 86-2 67 21
Position
Siemens AG, EV HBA4
13623 Berlin
Germany
Company/Department
Street
Town / Country
Telephone / Telefax
Power system data and requirements
Nominal system voltage
kV
or highest voltage for equipment U m
Earth fault factor (if known)
δ <1.4
1.4< δ <1.7
Earth fault duration (if known)
< 10 sec
> 10 sec
or type of neutral earthing
Direct
Low-resistance
kV
δ= 3
Arc-suppression coil (earth fault compensation)
Nominal discharge current
kA
Line discharge class
Connection to (GIS, transformer,...)
Manufacturer / Type
Seismic requirements
Monitoring devices
Any other data / information
Power Transmission and Distribution Group
High Voltage Division
Arrester and Limiters
Power
Transmission
and Distribution
Siemens AG, EV HBA4
D -13623 Berlin
Subject to change without prior notice
Siemens Aktiengesellschaft
11.97