Station and intermediate class
surge arresters
Product guide IEEE
siemens.com/energy/arrester
Definition of surge arresters
Surge arresters are used to protect high-voltage equipment in substations, such as transformers, circuit
breakers, and bushings, against the effects of overvoltages caused by incoming surges. Such overvoltages
can be caused by a direct or nearby lightning strike, an electromagnetic pulse, electrostatic discharge, or
switching operations in the power supply system as well as in devices. Some overvoltages are very high in
energy. The current from the surge is diverted through the arrester, in most cases to earth. Effective overvoltage protection requires different surge arrester types to be used according to the particular application.
2
Contents
Definition of surge arresters
02
Siemens surge arresters for any requirement
04
Always the best solution
05
History timeline
06
MOVs: the core of Siemens surge arresters
08
Silicone rubber
09
Porcelain
10
Station and intermediate class surge arresters
11
3EL silicone rubber surge arresters with Cage Design
12
3EQ silicone rubber surge arresters with composite hollow core design
14
3EP porcelain surge arresters
16
Standards and testing – reliability you can count on
17
Selection table and how to select a suitable surge arrester
18
Applications as line surge arresters
23
Early detection of relevant changes through efficient equipment monitoring
24
Product range
26
3EL5 Surge arrester with silicone rubber housing and Cage Design™
28
3EL1 Surge arrester with silicone rubber housing and Cage Design™
32
3EL2 Surge arrester with silicone rubber housing and Cage Design™
36
3EL3 Surge arrester with silicone rubber housing and Cage Design™
42
3EP5 Surge arrester with porcelain housing
48
3EP4 Surge arrester with porcelain housing
52
3EP6 Surge arrester with porcelain housing
58
3EQ1 Surge arrester with composite hollow core design
64
3EQ4 Surge arrester with composite hollow core design
68
Accessories for surge arresters
74
Monitoring devices for surge arresters
74
3
Siemens surge arresters
for any requirement
Experience is most essential when it comes to reliability in
medium- and high-voltage applications. Siemens has been
designing and manufacturing medium- and high-voltage
surge arresters for standard and special applications since
1925. Continuous research and development, the wealth
of Siemens know-how, and comprehensive worldwide
experience give Siemens surge arresters a leading edge
in overvoltage protection. Their uncompromising quality
ensures a long service life and reliability in any
application.
Siemens surge arresters are an indispensable aid to insulation coordination in electrical power supply systems. Valu-
able equipment such as transformers, circuit breakers,
generators, motors, capacitors, traction vehicles, and
bushings, as well as complete switchgear, is ideally
protected against lightning and switching overvoltages.
Siemens surge arresters have been designed to meet the
requirements of a wide range of common installation
environments, from arctic cold to the heat of the desert
and the humidity of tropical climates. They are available
for any application from 3 kV up to 1,200 kV including
special applications such as high-voltage direct current
(HVDC) and FACTS systems as well as all kinds of compensation systems for electric power networks.
Substation Bidingen 400 kV
Protection of transformer
Solution with 3EQ4
4
Always the
best solution
Developments in technology and practical experience
have led to three different surge arrester designs:
• Surge arresters with porcelain housings
• Surge arresters with silicone housings
• Surge arresters with metal enclosures
Siemens provides each of these types in several versions,
making it possible to find the optimal surge arrester for
every conceivable application and meet even specific
demands, such as
• High mechanical stability for outstanding seismic safety
• E
xtremely reliable pressure relief behavior for use in
areas requiring special protection
• E
xcellent pollution layer characteristics for use in
coastal and desert regions or in areas with extreme
air pollution.
All Siemens surge arresters feature a superior sealing
system that reliably prevents moisture ingress to ensure
the highest possible degree of overvoltage protection and
decades of trouble-free service. Moreover, the choice of
materials used in the making of Siemens surge arresters
contributes to the protection of the environment.
Substation Bidingen 400 kV
Protection of switchgear
Solution with 3EQ4
5
1925
1989
Siemens begins developing
surge arresters. The first
devices are of the so-called
cathode drop type.
The 3EQ2 surge arrester for
systems of up to 550 kV is
one of the first high-voltage surge arresters with
composite polymer hollow
core housing.
1847
1971
The ten-employee company
Telegraphen-Bauanstalt
von Siemens & Halske
(Telegraph Construction
Company of Siemens &
Halske) begins operation
on October 12, 1847, in
a back building in Berlin.
Development of the first
gas-insulated and metalencapsulated surge arrester
for gas-insulated switchgear (GIS).
1900
1866
Werner von Siemens discovers the dynamo-electric
principle, which enables
electricity to be put to practical use. The dynamo can
convert mechanical energy
into electrical energy in an
economical way. Its invention lays the foundation for
today’s world of electrical
engineering.
1963
1992
The first surge arrester for
systems of up to 550 kV is
launched. The pulley wheel
electrodes are replaced by
ceramic-bonded shunt
resistors and a series spark
gap. The surge arrester
comprises three columns in
parallel and has a resistivecapacitive control.
Continually pushing the
envelope, Siemens develops a high-voltage surge
arrester with a composite
polymer housing for systems of up to 800 kV. It
was originally developed
as a suspended mounted
HVDC valve arrester with
several parallel metal oxide
columns in a common
housing.
1982
Siemens’ first gapless metal
oxide arrester, a GIS surge
arrester, is delivered for the
123 kV grid in Inchicore, a
suburb of Dublin.
History timeline
Siemens is a pioneer in many fields of the electricity and digitization markets. Experience is most essential
when it comes to reliability in medium- and high-voltage applications. Since 1925 Siemens has been manufacturing high-voltage surge arresters up to duty cycle voltages of 1,200 kV – for standard and specialized applications. Our permanent research and development and the concerted know-how in our factories give our
surge arresters a leading edge in overvoltage protection. Our uncompromising quality ensures the long
service life and reliability of each application.
6
1998
The polymer-housed medium-voltage/distribution
class arresters of the 3EK
family, which features Cage
Design™, a unique solution
with direct silicone molding
on the metal oxide varistors, is introduced.
2003
Completion of the first
line arrester project, an
order from KELAG, one of
the leading energy service
providers in Austria.
2007
2011
3EL2, the first line arrester
for 550 kV applications, is
delivered to Sochi, a city in
Russia.
Siemens introduces its
new range of long rod
insulators.
2000
2010
2006
2008
2010
Development of the 3EQ5,
a new surge arrester concept
with composite housing
(type A) for extra highvoltage applications in
800 kV DC and 1,200 kV AC
transmission systems.
The first externally gapped
line arrester (EGLA), which
increases the reliability of
a 144 kV overhead line, is
supplied to the South Korean power provider KEPCO.
The world’s first 1,200 kV
substation arrester with
composite polymer hollow
core technology is delivered to Power Grid Corporation of India.
2010
2000
Development of the first
GIS arrester for systems of
up to 800 kV.
Siemens launches the
arrester condition monitor,
an innovative monitoring
solution with unique
features.
As a pioneer in the field of silicone rubber insulation and one of the few suppliers with comprehensive
in-house research and development capabilities in this technology, Siemens has been providing surge
arresters with silicone rubber housing for more than 30 years and has gathered excellent service experience from even the most severe climatic and environmental conditions. Today, silicone rubber is among
the most widely used materials for high-voltage outdoor equipment.
7
MOVs: the core of
Siemens surge arresters
The main task of an arrester is to protect
equipment from the effects of over­
voltages. During normal operation, an
arrester should have no negative effect
on the power system. Moreover, the
arrester must be able to withstand typical
surges without incurring any damage.
Nonlinear resistors fulfill these requirements thanks to the following properties:
Nonlinear resistors made of metal oxide
(MO) have proven especially suitable for
this use. The nonlinearity of MO resistors
is considerably high, which is why MO
arresters do not need series gaps. Siemens
has many years of experience with
gapless MO arresters in low-voltage
systems, distribution systems, and
transmission systems.
• L ow resistance during surges, so that
overvoltages are limited
Siemens metal oxide varistors (MOVs)
provide a high switching surge energy
rating and a very low protection level.
This means they absorb a high amount of
energy while avoiding thermal runaways.
The MOVs are characterized by their high
single impulse withstand rating. Siemens
surge arresters are less prone to selfheating and consequent self-destruction,
and they maintain their characteristics
throughout their lifetime.
igh resistance during normal opera• H
tion to avoid negative effects on the
power system
ufficient energy absorption capability
• S
for stable operation
With this kind of nonlinear resistor,
there is only a small flow of current when
continuous operating voltage is being
applied. When there are surges, however,
excess energy can quickly be removed
from the power system by a high
discharge current.
p.u. Ur
Power-frequency
voltage vs. time (U-t)
characteristic (TOV)
1.30
1.25
Preheating to 60°C prior duty
1.20
1.15
1.10
1.05
1.00
0.95
0.90
0.85
0.80
1
10
100
1,000
10,000
t/s
8
Silicone rubber
As a pioneer in the field of silicone rubber
insulation and one of the few suppliers
with comprehensive in-house research
and development capabilities in this
technology, Siemens has been providing
surge arresters with silicone rubber
housing for more than 30 years and has
gathered excellent service experience
from even the most severe climatic and
environmental conditions. Today, silicone
rubber is among the most widely used
materials for high-voltage outdoor
equipment.
Siemens silicone rubber-housed surge
arresters are polymer-housed arresters
that use silicone rubber as the only insulating material. The exclusive use of silicone has proven to be the best solution
in several studies: Silicone rubber is
highly hydrophobic. While there are many
polymeric materials with similar initial
hydrophobic properties, most of them,
such as EPDM alloy rubber, lose their
hydrophobicity after a relatively short
period. Only genuine silicone rubber as
used by Siemens is capable of maintaining its hydrophobicity throughout its
entire lifetime. This ensures the long service life of Siemens surge arresters with
silicone rubber housing. Even the most
severe ambient conditions, such as salt
fog in coastal regions or dust-laden air
causing serious contamination in an
industrial area, cannot impair the hydrophobicity of silicone rubber. This material
property reliably prevents conductive
moisture from forming on the arrester
surface, thus averting surface currents
and discharges. Moreover, genuine
silicone is highly fire-retardant and selfextinguishing, and it is neither subject to
erosion nor sensitive to UV radiation. This
ensures the long-term stability of the
housing material.
There are several characteristics that set
the silicone elastomers used by Siemens
apart from other organic insulating
materials.
As a matter of principle, Siemens only uses
HTV (high-temperature vulcanized) or LSR
(liquid silicone rubber) silicone elastomers.
These types of silicone help maintain the
properties mentioned above.
Characteristic damage on
EPDM insulators due to
natural UV radiation
Chalking
The –Si–O– backbone of silicone rubber
has a higher bonding energy than the
–C–C– backbone of EPDM. Silicone rubber has a lower carbon proportion than
EPDM. Consequently, silicone rubber
boasts inherently better chemical and
physical resistance, better UV resistance,
and lower flammability than EPDM.
Consider these facts:
• S
ilicone rubber is highly stable under
the influence of ultraviolet radiation
(sunlight), ozone, and nitrogen oxide.
Its stability beats that of EPDM-based
alloy rubbers.
he hydrophobic performance of a sili• T
cone rubber surface remains excellent
throughout the entire arrester service
life, whereas EPDM-based alloy rubbers lack this critical requirement.
Cracking
he hydrophobicity of silicone rubber
• T
returns after a corona discharge,
which assures reliable long-term
performance.
• T
he arcing resistance of silicone rubber is higher as compared to EPDMbased alloy rubbers.
he flame-retardant properties of
• T
silicone rubber comply with IEC 60707
and UL94 V-0 (i.e. self-extinguishing,
no burning drips, probe does not burn).
Moisture
• S
ilicone rubber is resistant to all common organic and nonorganic cleaning
agents and solvents.
ilicone rubber performs well in an
• S
ambient temperature range of –75 °F
to +400 °F. No other polymeric
material can beat silicone rubber.
POWERSIL®
Hydrophobic effect on Siemens 3EL
surge arrester due to alignment of
methyl groups in silicone polymers.
9
Porcelain
Siemens porcelain surge arresters feature
a directional pressure relief device that
ensures maximum protection in the case
of an overload. Thanks to the excellent
sealing of its surge arresters, Siemens has
recorded decades of trouble-free service
life without failures or moisture ingress.
Both ends of a porcelain surge arrester
housing are equipped with aluminum
flanges that are cemented to the housing.
Sulfur cement is the first choice for this
purpose. It has favorable mechanical properties and also proves advantageous over
Portland cement, which is quite common
in the insulator industry. The main advantage of sulfur cement is that it can be
10
brought into contact with aluminum
during manufacturing without causing any
corrosion, and it can be quickly processed,
since it almost reaches its full mechanical
strength directly after application.
The design of the flanges and the end
sections of the porcelain housings is key
to the strength of the entire housing. This
is why these parts of Siemens arresters
are designed in a way that ensures that
the cement joint is mechanically stronger
than the porcelain itself. This enables
making full use of the porcelain’s strength
when specifying the permissible mechanical head loads of the arrester housing.
Station and intermediate class
surge arresters
Siemens provides three surge arrester product
families for standard and special AC applications
from 3 kV up to 800 kV, which are described
in this brochure:
• 3EL surge arresters with silicone housing,
Cage Design™
•3EQ surge arresters with silicone housing,
composite hollow core design
• 3EP surge arresters with porcelain housing
11
3EL silicone rubber surge
arresters with Cage Design
Design features
Cage of FRP rods
End fittings
Metal oxide
blocks
Silicone rubber
sheds directly
molded on
metal oxide
blocks and on
end fittings
Siemens’ Cage Design ensures high
mechanical strength and safe overload
performance. It is characterized by the
use of silicone and fiberglass-reinforced
plastic (FRP) rods as housing materials.
Reliability is guaranteed by the direct
molding of the silicone rubber onto the
MO blocks and the FRP rods. This ensures
the total embedding of all components
free of enclosures and gaps, thus preventing any partial discharge or moisture
ingress.
The MO blocks of 3EL surge arresters
are enclosed by a cage made of FRP rods,
which leads to a rigid, reinforced structure ensuring high mechanical strength.
The high tensile strength of the FRP rods
is used to hold the arrester’s MO blocks
in place tightly. This is why Cage Design
arresters are among the mechanically
strongest polymer arresters available on
the market and at the same time ensure
minimal use of material and very low
weight. As the MO blocks are neither
enclosed in a sealed mechanical shell
nor wrapped in hard material, no excess
pressure will develop in the case of an
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overload or the extremely rare event
of an arrester short circuit. The arc can
escape directly through the soft silicone
housing, and the ejection of internal
parts that could damage other equipment
nearby is prevented almost completely.
Long service life
Mechanically strong enough to meet
common mechanical requirements and
with sheds that are resistant to damage
resulting from transport, installation,
storms, earthquakes, and vandalism,
3EL surge arresters are perfectly suited
for installations that demand low weight
and indestructibility of the arrester.
Low weight: flexible and
easy installation
The use of FRP and silicone as housing
materials also makes Siemens 3EL arresters extremely lightweight, allowing easy
transport and flexible installation. The
use of 3EL surge arresters helps reduce
the required strength and weight of arrester supports and the need for heavy
installation equipment.
Applications
The 3EL series of surge arresters covers
a wide range of common installation
requirements including station and line
surge arresters for the protection of
switchgear, transformers, and other
equipment in high-voltage systems of
up to 550 kV. 3EL surge arresters can
be installed at all mounting angles
(e.g. horizontally, vertically, or suspended
from the transmission line as line surge
arrester).
Horizontal cut of a cage design
arrester
13
3EQ silicone rubber surge
arresters with composite
hollow core design
Design features
Directional
pressure relief
device
Cage of FRP rods
End fittings with
directional pressure
relief device and
sealing system
Metal oxide blocks
FRP tube
Silicone rubber sheds
directly molded on
FRP tube
Directional
pressure relief
device
Siemens’ innovative composite hollow
core design uses silicone and a fiberglass
reinforced plastic (FRP) tube as housing
materials. The advantages of this design
are more than compelling, as it offers
the perfect combination of cost savings
and safety for substations. The direct
molding of the silicone rubber onto the
FRP tube ensures reliability, while an
excellent special sealing of the flanges
at both ends of the surge arrester effectively prevents partial discharges and
moisture ingress. The combination of
silicone rubber and FRP tube also allows
14
an enormous withstand capability
against mechanical forces. Hence, 3EQ
surge arresters are the perfect choice for
the replacement of existing post insulators in substations of up to 800 kV.
The composite hollow core design
provides a very high degree of safety:
In the case of an overload or the
extremely rare case of an arrester
short circuit, the arc escapes directly
through directional pressure relief
devices, internal parts are not ejected,
and the housing does not break.
A reliable, sturdy, and
economic choice
Siemens 3EQ composite hollow core
design surge arresters are virtually
indestructible. While the composite
hollow core design provides the highest
possible mechanical strength and enables
the support of high bending moments,
the silicone rubber insulation is ideal
for outdoor applications in severe environmental conditions. No matter how
tough environmental and operating
conditions may be, 3EQ arresters assure
100% reliable pressure relief performance
and provide the ultimate in protection.
They are shatterproof and retain at least
75 percent of their mechanical strength
even after pressure relief, and they provide the greatest stability, even during
earthquakes.
Reduced space
requirements
Whenever space is at a premium, 3EQ
surge arresters can even be mounted
directly over a transformer to support
connectors without any danger to neighboring equipment. Their unique composite hollow core design ensures maximum
stability, even if an arrester should »blow
out« after overloading. Pressure relief is
absolutely reliable – there is no danger
to equipment in the direct vicinity, no
parts will be ejected, and the emerging
arc will safely burn between the ends of
the pressure relief device.
Longevity and reliability
The silicone rubber housings of 3EQ
surge arresters provide the best possible
long life performance for high-voltage
surge arresters. They make use of all the
advantages of vulcanizing silicone rubber
sheds onto an FRP tube, providing
enhanced safety and meeting every
requirement.
Applications
Horizontal cut of a composite
hollow core design arrester
Siemens 3EQ composite hollow core
design surge arresters will go the extra
mile. They meet highest mechanical
demands and are ideally suited for challenging environments, such as areas with
heavy seismic activity or extremely high
wind loads.
3EQ surge arresters boast a prolonged
service life, because they are absolutely
shatterproof and feature reliable overload
performance with no hazardous splinters
being ejected even under maximum
pressure. These arresters can be installed
close to costly system components. 3EQ
composite hollow core design arresters
are virtually indestructible during transportation, installation, storms, and
earthquakes, and they are immune to
vandalism.
15
3EP porcelain
surge arresters
Design features
Directional
pressure relief
device
Cage of FRP rods
End fittings with
directional pressure
relief device and
sealing system
Metal oxide blocks
Porcelain housing
Directional
pressure relief
device
Siemens’ 3EP porcelain-housed surge
arresters are the ideal choice for high
mechanical performance requirements
at voltage levels of up to 800 kV. With
a seismic qualification of 0.5 g that is
guaranteed up to 800 kV, they suit environments with even the most challenging
mechanical requirements, such as heavy
seismic activity and extremely high wind
loads.
3EP surge arresters ensure maximum
protection in an overload situation
thanks to a specially designed directional
pressure relief device. In the case of an
overload or the extremely rare case of
an arrester short circuit, the arc escapes
easily through the pressure relief devices.
No pressure is built up inside the arrester
and no internal parts are ejected, which
prevents damage to surrounding
equipment.
16
The excellent sealing system of 3EP surge
arresters prevents failures or moisture
ingress and guarantees decades of troublefree service. The use of nonporous
sulfur cement instead of corrosive Portland cement for bonding protects the
MO blocks and prevents aging effects.
The MO blocks of 3EP surge arresters are
enclosed by a rigid, reinforced cage made
of FRP rods. The high tensile strength of
the FRP rods is used to hold the arrester’s
MO blocks in place tightly.
Applications
Thanks to their high degree of safety and
reliability, Siemens 3EP porcelain-housed
surge arresters can be installed in close
proximity to costly system components.
3EP composite hollow core design arresters are virtually indestructible during
transportation, installation, storms, and
earthquakes, and they are immune to
vandalism.
Standards and testing –
reliability you can count on
Tests
Standardization
Siemens surge arresters have been
designed and tested in compliance with
the latest IEC 60099-4, IEEE C62.11,
and GB 11032 standards. All type tests
are performed by independent, PEHLAcertified laboratories; reports are available on request. Please contact your
Siemens representative for details.
The aim of the IEEE’s Surge Protective
Device Committee (SPDC) as well as the
IEC’s Technical Committee 37 (TC 37) is
the standardization of surge arrester
testing and application.
Moreover, every single surge arrester that
leaves the Siemens factory undergoes a
routine test and is delivered with a
routine test certificate.
Quality Assurance
Siemens meets all requirements of
ISO 9001:2008, ISO 14002:2004, and
BS OHSAS 18001:2007. All Siemens
suppliers need to be certified according
to ISO standards or will be audited by
Siemens.
To maintain sustainable quality improvement, Siemens introduced corporate
quality guidelines that contribute to each
step of the quality process.
The test field is certified by the
»Deutsche Akkreditierungsstelle«
(Germany’s national accreditation body)
according to DIN EN ISO/IEC 17025
The SPDC develops the standard
IEEE C62.11 and the application guide
IEEE C62.22, while the TC 37 develops
the standards IEC 60099-4, IEC 60099-8
(EGLA), IEC 60099-9 (HVDC), and the
application guide IEC 60099-5. Both
committees include representatives of
manufacturers, utilities, test field labs,
and universities.
Siemens R&D experts are members of
both bodies, thus playing an important
role in the definition of the standards.
They also share their expert knowledge
in electrical power systems in CIGRE, the
international council on large electric
systems, which participates in the development of international standards.
Test generator supplying both
impulse voltages (1.2/50 µs
and 250/250 µs) and impulse
currents (8/20 µs and 30/60 µs)
UHV arrester prepared
for testing in the
HV test laboratory
17
Selection table
System
Highest voltage
of the system Us
Neutral earthing
electrical
Temporary
overvoltages (TOV)
Arrester
Environment
Cont. operating voltage Uc,min –>
Duty cycle voltage Ur1
Duty cycle voltage Ur
Cont. operating voltage Uc
Duty cycle voltage Ur2
Lightning current
stress
Lightning impulse
classifying current In
Insulation level, safety
margin, distance
(protective zone)
LI protective level
SI protective level
Energy (single-impulse
withstand rating,
switching voltages)
Energy class
Ground flash density,
magnitude of
lightning strikes
Active part specified
Length of housing, number of units,
flashover distance (withstand voltages)
Altitude of erection
Leakage distance,
shape of sheds
mechanical
Short-circuit current
Mechanical forces
(short-circuit current,
bending and tensile
loads)
Diameter, material, length of
units (number of units)
Seismic stress
Rated short-circuit
current Is, mechanical
loads MDCL resp. UMS
Housing
Fig. 1: Configuration procedure for an MO surge arrester
18
Pollution
How to select
a suitable surge arrester
This section describes the general approach to selecting
typical arresters for overvoltage protection in high-voltage
systems. For a detailed description of how to configure a
surge arrester, please refer to the handbook
Metal-Oxide Surge Arresters in High-Voltage Power
Systems – Fundamentals.1
The requirements for a surge arrester emerge from two
basic requirements: It should provide adequate protection
with a sufficient safety margin, which means that overvoltages at the device to be protected must always remain
below its withstand voltage. Furthermore, the surge
arrester should be dimensioned for stable continuous
operation, which means that the arrester must remain
electrically and thermally stable under all conditions while
handling all long-term, temporary, and transient stress
resulting from network operation.
These two requirements cannot be fulfilled independently.
A reduction of the protective level automatically means a
higher degree of specific electrical stress during continuous operation, and conversely, the continuous operating
voltage of an arrester cannot be increased arbitrarily
without raising its protective level as well. Both operating
points are for a given type of MOV strictly associated with
each other through the voltage-current (U-I-) characteristic curve.
Step 1:
Selection of the maximum continuous
operating voltage and the duty cycle
voltage.
The first step is to define the minimally required continuous operating voltage Uc,min. This must be as high as the
continuous phase-to-earth voltage of the system. Here,
»continuously« applied voltage means every voltage that
occurs within an uninterrupted period of more than 30
minutes. The type of neutral earthing of the system is
decisive in determining the continuous operating voltage.
In isolated or resonant earthed neutral systems, the voltage of a healthy phase against ground takes on the value
of the phase-to-phase voltage in the case of a one-phase
earth fault (earth fault factor k = 1.73). Since resonant
earthed neutral systems are operated quite commonly for
time periods of more than 30 minutes in this condition,
the continuous operating voltage of the arrester must,
in this case, have the value of the highest voltage of the
system, Us.
Solidly earthed neutral system:
Uc,min ≥ Us/√3
Isolated or resonant earthed neutral system:
Uc,min ≥ Us
The definition of the minimally required continuous operating voltage, a factor which usually has a value of 1.25,
helps achieve a duty cycle voltage Ur = 1.25 · Uc,min. This
is the lowest necessary duty cycle voltage of the arrester.
Table »Typical duty cycle voltages Ur for highest voltages
of the system Us « on page 27 lists typically applied duty
cycle voltages.
Volker Hinrichsen: »Metal-Oxide Surge Arresters
in High-Voltage Power Systems«, 3rd edition, September 2012,
Order No. E50001-G630-H197-X-4A00
1
19
Step 2:
Selection of the lighting impulse
classifying current In
The lighting impulse classifying current In serves to classify
a surge arrester. From a technical point of view, it is calculated from a typical maximum lightning current amplitude
that can be expected in the substation, for which the insulation coordination is performed via the arrester’s lightning protection level. This amplitude is calculated from
the flashover voltage Ufo of the line insulators, the lightning protection level Upl of the arresters, and the surge
impedance Z of the line for Imax:
Imax = (2·Ufo – Upl)/Z
Example for a 420 kV system:
Ufo = 2.1 MV
Upl = 806 kV
Z = 350 Ω
Imax = 9.7 kA
A 10 kA arrester, for instance, can readily withstand lightning current impulses of higher amplitudes without severe
damage.
Step 3:
Selection of protective levels
The protective characteristics of an arrester are most frequently assessed by means of its lightning impulse protective level: It is assessed according to its discharge voltage
while the lighting impulse classifying current is flowing.
This usually means that a protective level equaling the
standard lightning impulse withstand voltage of the
device to be protected and divided by a factor of 1.4 is
adequate for protection against lightning overvoltages.
Upl, 10kA, 8/20µs < BIL / 1.4
The selection of the electrical characteristics of the
arrester is finished when the requirements regarding the
protective levels of all mentioned current impulse stresses
are fulfilled.
Example U-I-curve 550 kV network
U / kV
1400
1000
600
50 Hz
200
0
0.001
0.1
10
I/A
20
Step 4:
Selection of the energy class
Step 5:
Selection of the housing
The application guide IEEE C62.22 to the standard
IEEE C62.11 describes how the energy handling capability
of a surge arrester can be determined.
Dielectric and mechanical requirements are generally
taken into account when selecting the housing. The
length, the leakage distance, and the material must be
determined. The arrester characteristics determined by
the housing are the rated short-circuit current Is, the Maximum Design Cantilever Load-static (MDCL-static) for surge
arresters with silicone housing and the Ultimate Mechanical Strength-static (UMS-static) for surge arresters with
porcelain housing.
Surge arresters dissipate switching surges by absorbing
thermal energy. The amount of energy is related to the
switching surge magnitude and wave shape, the system
impedance, the arrester voltage-current characteristics, and
the number of operations. The selected arrester should have
an energy capability greater than the energy associated with
the expected switching surges on the system.
The application guide IEEE C62.22 offers equations to
estimate the energy handling capability requirements of
surge arresters.The energy discharged by an arrester J in
kJ may be estimated by the equation:
First of all, the clearance, which results from the withstand voltage requirements, must be determined. Siemens
takes care of the parameters »demand by MOV column«
and »clearance« by stating the minimum required housing
length.
J = 2DL EA IA / ν
Where
DL is the line length (in kilometers)
EA is the arrester switching impulse
discharge voltage (in kV) for IA
IA is the switching impulse current (in kA)
v is the speed of light, 300,000 km/s
The equation assumes that the entire line is charged to a
prospective switching surge voltage (which exists at the
arrester location) and is discharged through the arrester
during twice the travel time of the line. The single discharge voltage and current are related by the equation:
IA = (ES − EA) / Z
Where
ES is the prospective switching surge voltage (in kV)
Z is the single-phase surge impedance of line (in ohms)
The table below shows the definition of the energy class
according to standard IEEE C62.11. This energy is not a
fixed value, but instead depends on the arrester’s protective level. The higher the discharge voltage, the less
energy the arrester absorbs during the line discharge,
since the line will discharge less intensely when the discharge voltage is higher.
Energy Class
A
B
C
D
E
F
G
H
J
K
L
The minimal housing length first of all results from the
demand that the MOV column (the active part) must fit.
The length of this column is determined by the electrical
data that were gathered during the selection steps taken
up to that point. Generally speaking, further demands
cause the housing lengths to be much greater than those
of the active parts.
M
N
Energy Rating
(Two Shot)
3.0 4.5 6.0 7.5 9.0 11 13 15 18 21 24 27 30
kJ/kVMCOV
Leakage distance requirements are, however, a much
more frequent reason for longer housings. The shortest
possible housing as a result of the length of the active
part can normally be achieved only by designing for specific leakage distances of less than 1 inch per kV duty
cycle voltage. However, specific creepage distances of
1.25 inch/kV duty cycle voltage and more play an important role. In addition, there are environmental conditions,
such as maritime and desert climates as well as heavy
industrial pollution, that require the use of even longer
leakage distance.
After the housing parameters have been determined in
order to fulfill the electrical requirements, the next and
last steps focus on mechanical criteria. They indirectly
lead to the selection of housing material and housing
diameter. There often is only a vague idea as to the
mechanical stress of an arrester in service, and accordingly no requirements are made or – maybe even worse –
values are estimated too high. If there is no information
available about the actual requirements, the following
values can serve as a guideline for the necessary dynamic
head loads in high-voltage systems:
Highest system voltage Us (kV)
Dynamic load (lbf)
< 121
200
121 … 420
225
550
340
800
450
21
Glossary
Maximum Continuous Operating Voltage
(MCOV, symbol Uc)
indicates the designated permissible root mean square
value of the power frequency voltage that is allowed to
be applied continuously between the arrester terminals.
Leakage (distance)
defines the distance between the metal end fittings, measured along the housing surface. It is an important factor
in the behavior of an insulator – or a device containing an
insulator – in polluted conditions.
Highest voltage of a system (symbol Us)
indicates the root mean square value of the highest
phase-to-phase operating voltage that occurs under normal operating conditions at any time and at any point in
the system.
Lightning impulse classifying current (symbol In)
indicates the peak value of a lightning current impulse
used to classify an arrester.
Protective level
is the maximum value of an arrester’s discharge voltage at
a standard current impulse. In this case, there is a difference between the lightning impulse protective level (8/20
µs), the switching impulse protective level (30/60 µs), and
the steep current impulse (1/2µs) protective level.
Rated short-circuit current (symbol Is)
indicates the root mean square value of the symmetrical
highest short-circuit current that can flow after an arrester
has been overloaded without causing violent shattering of
the housing.
Duty cycle voltage (symbol Ur)
is the maximum permissible root mean square value of
the power frequency voltage between the arrester terminals at which the arrester is designed to operate correctly
22
under temporary overvoltage conditions as established
in the operating duty tests. Normally, the manufacturer
specifies whether it can be applied to the arrester for a
duration of 10 seconds (which corresponds to the value
in the operating duty test) or 100 seconds. The duty cycle
voltage is the reference parameter for determining the
operating characteristics.
Discharge voltage
quantifies the voltage drop between the arrester’s
terminals when a current impulse is injected. For current
impulses in the shape and value of a standard test current
impulse (lightning current impulse, switching current
impulse, steep current impulse), the simultaneously
occurring discharge voltages define the protective
levels that are assigned to this current shape and value.
Maximum Design Cantilever Load-static (MDCL-static)
is a force perpendicular to the longitudinal axis of an
arrester and allowed to be applied during service for long
periods without causing any mechanical damage to the
arrester.
Ultimate Mechanical Strength-static (UMS-static)
is a force perpendicular to the longitudinal axis of an
arrester and allowed to be applied during service for long
periods without causing any mechanical damage to the
arrester.
Temporary overvoltage (TOV)
denominates the power frequency overvoltage that can
occur for a duration of several tenths of a second to up
to a few seconds, as a result of a switching operation or
system failure. Its value depends on the type of neutral
earthing in the system.
Applications as
line surge arresters
The use of surge arresters on hazardous
stretches of a power line helps improve
network protection and increases the reliability of the entire transmission system.
Offering a highly efficient combination of
low weight, outstanding strength, and
safety features, Siemens 3EL surge arresters are ideally suited for this purpose.
Siemens provides two solutions for line surge arresters:
400 kV line in Bulgaria
NGLA solution realized with 3EL2
Non-gapped line arresters (NGLA)
Externally gapped line arresters (EGLA)
Non-gapped line surge arresters offer a
high degree of mounting flexibility and
operational reliability. Depending on the
tower design and the arrangement of
insulators and lines, these arresters can
either be installed directly on the insulators or on the tower. Thanks to their high
energy absorption capacity, non-gapped
line arresters ensure a very high level of
protection against overvoltages caused
by lightning and network-generated
switching impulse currents.
Siemens EGLA line surge arresters of the
3EV1, 3EV2, and 3EV5 series have an
external spark gap placed in series that
galvanically isolates the active part of the
line surge arrester from the line voltage
under normal conditions. In case of
lightning, the spark gap is ignited and
the dangerous overvoltage is safely discharged through the resulting arc. The
active component limits the subsequent
current to ensure that the arc is extinguished within the first half-cycle of the
operating current frequency.
Siemens 3EL1, 3EL2, 3EL3, 3EL5 surge
arresters are available as NGLA types.
550 kV line in Colombia
NGLA solution realized with 3EL2
The series varistor units (SVU) of the
EGLA 3EV1, 3EV2, and 3EV5 product lines
are based on the respective 3EL1, 3EL2,
and 3EL5 product lines.
Refer to the brochure »Line surge arresters for increased system reliability« for a
detailed overview of Siemens’ solutions for line surge arresters.
23
Early detection of relevant
changes through efficient
equipment monitoring
Due to continuously growing worldwide
power demand, more and more power
networks are required to transmit
higher loads – sometimes up to the limits
of their capacity. This makes reliable,
responsible network operation an
increasingly difficult challenge. In many
of today’s markets, transmission and
distribution system operators are also
liable for compensation in the case of
power failures. And natural events like
lightning can cripple entire networks.
As a result, many network operators are
seeking solutions to increase the reliability of their transmission systems. Equipment monitoring is a proven method for
the recording of operating states and
remaining service life, providing the
operator with important asset management data and enabling the immediate
assessment of a network’s overall state.
24
Surge arresters are highly reliable
com­ponents in power transmission and
dis­tribution systems. When operated in
accordance with their specifications, their
service life can reach up to 30 years without any maintenance. Nevertheless, overloads that can cause arrester failure and
even endanger the safety of the network
may sometimes occur. Equipment monitoring helps detect changes and faults at
the earliest possible stage and supports
security of supply on a whole new level.
Siemens provides a complete line of monitoring devices with a variety of innovative functionalities that can be perfectly
matched to customer requirements,
ensuring that impending faults will be
detected as early as possible and before
security of supply is compromised.
Order code system
Data position
1
2
3
4
5
6
7
–
8
9
Order code
n
a
a
n
n
n
n
–
n
a
Product line
3
E
L
2
0
9
6
Rated voltage (kV)
Long duration current impulse, energy absorption capability
Application
Housing size
Line discharge class
Number of units
Form of sheds and color of housing
10 11 12
a
n
n
–
13 14 15 16
–
Z
n
–
Z
a
a
n
2
P
J
3
1
4
High-voltage terminal
X
Nameplate
H
Mounting
5
Accessories
a: alphabetical
n: numerical
Ordering example
The order code can be obtained through the following
steps:
1. Select the product line from table »Main technical data«
on page 26.
Example: product line 3EL2
2. Select the duty cycle voltage and required energy rating of the arrester using the »Ratings and specifications
– Electrical characteristics« in the technical datasheet
of the selected product line.
Example: 3EL2 096-2P.3.-…
3. Select the required housing using the »Ratings
and specifications – mechanical characteristics« in
the technical datasheet of the selected product line.
Example: for 3EL2 096-2P.3.-.… the minimum housing
is »J«: + 3EL2 …-..J…, resulting in: 3EL2 096-2PJ31-…
4. Select the required terminal, nameplate, and
mounting from the table »Order numbers«
Example: 3EL2 096-2PJ31-4XH5.
(4 = upright mounting, X = DIN/NEMA flat terminal,
H = English ANSI nameplate, 5 = ø 10.0”,
3-hole grounded)
5. Select optional accessories from table
»Optional accessories« on page 74
Example: D91 line clamp, resulting in
3EL2 096-2PJ31-4XH5-Z D91 D92
6. Select optional monitoring device from table
»Monitoring devices« on page 75.
Example: 3EX5 080-0 ACM basic
25
Product range
Siemens offers multiple models of each surge arrester
product family. The models mainly differ in diameter,
length of the housings, and sizes of the MOV blocks to
meet different customer requirements.
The following selection table shows the main technical data of the different product lines. Detailed technical data is
listed in the sections for each dedicated product line.
For additional specifications, please contact your local Siemens representative.
3EL5
3EL1
3EL2
3EL3
3EP5
3EP4
3EP6
3EQ1
Highest nominal system voltage
Maximum values
kV
69
69
345
500
69
345
765
345
765
Maximum duty cycle voltage kV
60
72
288
444
72
276
588
288
588
kV
48
57
230
353
57
220
470
230
470
Maximum MCOV Lightning
impulse
classi­
fying
current
Energy
class
kA
Switching
surge
energy
rating
Singleimpulse
withstand
rating
kJ/kVMCOV
C
4.5
0.6
10
B
10
C
6.0
1.2
10
E
9.0
2.0
15
F
11
2.4
15
G
13
2.8
20
J
18
3.6
20
K
21
6.0
Rated short-circuit current
kA
20
65
65
65
40
65
65
40
651
High-current short-duration
kA
65
65
65
100
65
65
100
65
100
3,098
7,435
24,782
58,238
n.a
n.a
n.a
37,173
130,106/
235,4302
n.a
n.a
n.a
n.a
21,242
47,794
191,175
n.a
n.a
Maximum design cantilever load
(MDCL)inch-lbf
Ultimate mechanical strength
(UMS-static)inch-lbf
Main technical data
26
3EQ4
1)
Increased rated short-circuit current of 80 kA available on request. 2) Increased MDCL.
The table below shows an overview of the typical minimum duty cycle voltage for the surge arrester, depending on the
system voltage and grounding of the system.
kV
Four-wire multi-grounded
neutral wye
Ur
kV
Three-wire low impedance
grounded neutral circuit
Ur
kV
Three-wire high impedance
grounded neutral circuit
Ur
kV
4.16
3
6
6
6
9
System L-L voltage
Un
6.9
8.3
9
12
9
12
12.47
9 or 10
15
13.8
10 or 12
15
22.86
15
21
27
36
23
34.5
18
30
48.3
36
54
69
54
72
115
96 or 108
138
120
161
144
230
180
345
258
500
396 or 420
765
588
90
Typical duty cycle voltages Ur for system voltages Un according to IEEE C62.11.
27
3EL5 Surge arrester with silicone
rubber housing and Cage Design™
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Traction vehicles
• Bushings
• Switchgear
• Transmission lines
Maximum values
3EL5
Highest nominal system voltage
kV
69
Maximum duty cycle voltage
kV
60
Maximum MCOV
kV
48
Lightning impulse classifying current
kA
10
Energy class
kJ/kVMCOV
4.5
Single-impulse withstand rating
C
0.6
Rated short-circuit current
kA
20
High-current short-duration
kA
65
inch-lbf
3,098
Switching surge energy rating
Maximum design cantilever load (MDCL)
28
3EL5
B
3EL5 – order numbers
Data position
1
2
3
4
Order number
3
E
L
5
3
E
L
5
–
5
6
7
x
x
x
x
x
x
–
8
9
10 11 12
0
P
H
1
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Silicone rubber-housed surge arrester, cage design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class B, Qs = 0.6 C, W = 4.5 kJ/kVMCOV
0
1
Application
Line surge arrester (For more details refer to catalog »Line surge arresters«)
L
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »B«, 1 unit, leakage distance 15 inch, height 7 inch
B
1
Housing »C«, 1 unit, leakage distance 19 inch, height 8 inch
C
1
Housing »D«, 1 unit, leakage distance 24 inch, height 9 inch
D
1
Housing »E«, 1 unit, leakage distance 31 inch, height 11 inch
E
1
Housing »F«, 1 unit, leakage distance 35 inch, height 12 inch
F
1
Housing »H«, 1 unit, leakage distance 48 inch, height 16 inch
H
1
Housing »J«, 1 unit, leakage distance 56 inch, height 19 inch
J
1
Housing »K«, 1 unit, leakage distance 63 inch, height 20 inch
K
1
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole insulated
1
ø 10.0”, 3-hole grounded
5
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EL5
29
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
kJ/kVmcov
C
Protective level
Maximum discharge voltage
8/20µs
1.5 kA
kV cr
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
Arrester order number
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
3
2.55
B
4.5
0.6
6.8
7.1
7.4
8.0
9.1
10.6
6.1
6.4
3EL5 003 - 0PB11 - ….
6
5.10
B
4.5
0.6
13.5
14.2
14.8
15.9
18.3
21.1
12.2
12.7
3EL5 006 - 0PB11 - ….
9
7.65
B
4.5
0.6
20.3
21.2
22.2
23.9
27.4
31.7
18.4
19.1
3EL5 009 - 0PB11 - ….
10
8.4
B
4.5
0.6
22.5
23.6
24.6
26.5
30.5
35.2
20.4
21.2
3EL5 010 - 0PB11 - ….
12
10.2
B
4.5
0.6
27.0
28.3
29.6
31.8
36.6
42.3
24.5
25.4
3EL5 012 - 0PC11 - ….
15
12.7
B
4.5
0.6
33.8
35.4
37.0
39.8
45.7
52.9
30.6
31.8
3EL5 015 - 0PC11 - ….
18
15.3
B
4.5
0.6
40.5
42.5
44.4
47.7
54.9
63.4
36.7
38.2
3EL5 018 - 0PD11 - ….
21
17.0
B
4.5
0.6
47.3
49.5
51.8
55.7
64.0
74.0
42.9
44.5
3EL5 021 - 0PD11 - ….
24
19.5
B
4.5
0.6
54.1
56.6
59.1
63.6
73.1
84.6
49.0
50.9
3EL5 024 - 0PE11 - ….
27
22.0
B
4.5
0.6
60.8
63.7
66.5
71.6
82.3
95.2
55.1
57.2
3EL5 027 - 0PE11 - ….
30
24.4
B
4.5
0.6
67.6
70.8
73.9
79.5
91.4
106
61.2
63.6
3EL5 030 - 0PF11 - ….
36
29.0
B
4.5
0.6
81.1
84.9
88.7
95.4
110
127
73.5
76.3
3EL5 036 - 0PH11 - ….
39
31.5
B
4.5
0.6
87.8
92.0
96.1
103
119
137
79.6
82.7
3EL5 039 - 0PH11 - ….
45
36.5
B
4.5
0.6
101
106
111
119
137
159
91.8
95.4
3EL5 045 - 0PH11 - ….
48
39.0
B
4.5
0.6
108
113
118
127
146
169
97.9
102
3EL5 048 - 0PH11 - ….
54
42.0
B
4.5
0.6
122
127
133
143
165
190
110
114
3EL5 054 - 0PJ11 - ….
60
48.0
B
4.5
0.6
135
142
148
159
183
211
122
127
3EL5 060 - 0PK11 - ….
Line terminals
NEMA flat terminal
3EL5 …-…..-.X.. (hot dip galvanized)
Figure A
30
3EL5
3EL5 …-…..-.Y.. (stainless steel)
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
15
7
1
2
-
463
6
A
15
7
1
2
-
463
6
A
15
7
1
2
-
463
6
A
15
7
2
3
-
463
7
A
19
8
2
3
-
393
7
A
19
8
3
4
-
393
7
A
24
9
4
5
-
328
8
A
24
9
4
5
-
328
8
A
31
11
5
6
-
291
9
A
31
11
6
7
-
291
9
A
35
12
7
9
-
262
10
A
48
16
8
10
-
197
11
A
48
16
9
11
-
197
12
A
48
16
12
13
-
197
13
A
48
16
12
13
-
197
13
A
56
19
16
18
-
167
14
A
63
20
16
18
-
154
15
A
Mounting
Insulated
Grounded
3EL5 …-…..-…1
3EL5 …-…..-…5
3EL5
31
3EL1 Surge arrester with silicone
rubber housing and Cage Design™
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Traction vehicles
• Bushings
• Switchgear
• Transmission lines
Maximum values
3EL1
Highest nominal system voltage
kV
69
Maximum duty cycle voltage
kV
72
Maximum MCOV
kV
57
Lightning impulse classifying current
kA
10
Energy class
kJ/kVMCOV
6.0
Single-impulse withstand rating
C
1.2
Rated short-circuit current
kA
65
High-current short-duration
kA
65
inch-lbf
7,435
Switching surge energy rating
Maximum design cantilever load (MDCL)
32
3EL1
C
3EL1 – order numbers
Data position
1
2
3
4
Order number
3
E
L
1
3
E
L
1
–
5
6
7
x
x
x
x
x
x
–
8
9
10 11 12
1
P
H
2
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Silicone rubber-housed surge arrester,
cage design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class C, Qs = 1.2 C, W = 6.0 kJ/kVMCOV
1
2
Application
Line surge arrester (For more details refer to catalog »Line surge arresters«)
L
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »C«, 1 unit, leakage distance 35 inch, height 12 inch
C
1
Housing »E«, 1 unit, leakage distance 55 inch, height 18 inch
E
1
Housing »H«, 1 unit, leakage distance 81 inch, height 24 inch
H
1
Housing »K«, 1 unit, leakage distance 121 inch, height 35 inch
K
1
Housing »E+H«, 2 units, leakage distance 136 inch, height 42 inch
N
2
Housing »2xH«, 2 units, leakage distance 161 inch, height 49 inch
H
2
Housing »E+K«, 2 units, leakage distance 176 inch, height 53 inch
P
2
Housing »H+K«, 2 units, leakage distance 202 inch, height 60 inch
Q
2
Housing »2xK«, 2 units, leakage distance 242 inch, height 71 inch
K
2
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole insulated
1
ø 10.0”, 3-hole grounded
5
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EL1
33
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
kJ/kVmcov
C
Protective level
Maximum discharge voltage
8/20µs
1.5 kA
kV cr
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
Arrester order number
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
3
2.55
C
6.0
1.2
6.6
6.9
7.3
7.8
8.7
10.0
6.0
6.2
3EL1 003 - 1PC21 - ….
6
5.10
C
6.0
1.2
13.3
13.9
14.5
15.6
17.5
20.0
12.0
12.5
3EL1 006 - 1PC21 - ….
9
7.65
C
6.0
1.2
19.9
20.8
21.8
23.4
26.2
30.0
18.0
18.7
3EL1 009 - 1PC21 - ….
10
8.40
C
6.0
1.2
22.1
23.1
24.2
26.0
29.1
33.3
20.0
20.8
3EL1 010 - 1PC21 - ….
12
10.2
C
6.0
1.2
26.5
27.8
29.0
31.2
34.9
39.9
24.0
25.0
3EL1 012 - 1PC21 - ….
15
12.7
C
6.0
1.2
33.2
34.7
36.3
39.0
43.7
49.9
30.0
31.2
3EL1 015 - 1PC21 - ….
18
15.3
C
6.0
1.2
39.8
41.7
43.5
46.8
52.4
59.9
36.0
37.4
3EL1 018 - 1PC21 - ….
21
17.0
C
6.0
1.2
46.4
48.6
50.8
54.6
61.2
69.9
42.0
43.7
3EL1 021 - 1PC21 - ….
24
19.5
C
6.0
1.2
53.0
55.5
58.0
62.4
69.9
79.9
48.0
49.9
3EL1 024 - 1PC21 - ….
27
22.0
C
6.0
1.2
59.7
62.5
65.3
70.2
78.6
89.9
54.1
56.2
3EL1 027 - 1PE21 - ….
30
24.4
C
6.0
1.2
66.3
69.4
72.5
78.0
87.4
99.8
60.1
62.4
3EL1 030 - 1PE21 - ….
36
29.0
C
6.0
1.2
79.6
83.3
87.0
93.6
105
120
72.1
74.9
3EL1 036 - 1PE21 - ….
39
31.5
C
6.0
1.2
86.2
90.2
94.3
101
114
130
78.1
81.1
3EL1 039 - 1PH21 - ….
45
36.5
C
6.0
1.2
99.5
104
109
117
131
150
90.1
93.6
3EL1 045 - 1PH21 - ….
48
39.0
C
6.0
1.2
106
111
116
125
140
160
96.1
99.8
3EL1 048 - 1PH21 - ….
54
42.0
C
6.0
1.2
119
125
131
140
157
180
108
112
3EL1 054 - 1PH21 - ….
60
48.0
C
6.0
1.2
133
139
145
156
175
200
120
125
3EL1 060 - 1PH21 - ….
72
57.0
C
6.0
1.2
159
167
174
187
210
240
144
150
3EL1 072 - 1PK21 - ….
Line terminals
NEMA flat terminal
3EL1 …-…..-.X.. (hot dip galvanized)
Figure A
34
3EL1
3EL1 …-…..-.Y.. (stainless steel)
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
35
12
1
2
-
619
13
A
35
12
1
2
-
619
13
A
35
12
1
2
-
619
14
A
35
12
2
3
-
619
14
A
35
12
2
3
-
619
14
A
35
12
2
3
-
619
15
A
35
12
3
4
-
619
15
A
35
12
4
5
-
619
15
A
35
12
5
6
-
619
15
A
55
18
6
7
-
424
19
A
55
18
6
7
-
424
19
A
55
18
8
10
-
424
19
A
81
24
9
11
-
305
23
A
81
24
10
12
-
305
23
A
81
24
12
13
-
305
23
A
81
24
16
18
-
305
24
A
81
24
16
18
-
305
25
A
121
35
21
24
-
210
29
A
Mounting
Insulated
Grounded
3EL1 …-…..-…1
3EL1 …-…..-…5
3EL1
35
3EL2 Surge arrester with silicone
rubber housing and Cage Design™
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Traction vehicles
• Bushings
• Switchgear
• Transmission lines
Maximum values
kV
345
345
Maximum duty cycle voltage
kV
288
288
Maximum MCOV
kV
230
230
Lightning impulse classifying current
kA
10
15
E
F
kJ/kVMCOV
9.0
11
Single-impulse withstand rating
C
2.0
2.4
Rated short-circuit current
kA
65
65
High-current short-duration
kA
65
65
inch-lbf
24,782
24,782
Switching surge energy rating
Maximum design cantilever load (MDCL)
3EL2
3EL2
Highest nominal system voltage
Energy class
36
3EL2
3EL2 – order numbers
Data position
1
2
3
4
Order number
3
E
L
2
3
E
L
2
–
5
6
7
x
x
x
x
x
x
–
8
9
10 11 12
2
P
M
3
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Silicone rubber-housed surge arrester,
cage design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Energy class F, Qs = 2.4 C, W = 11.0 kJ/kVMCOV
6
4
Application
Line surge arrester (For more details refer to catalog »Line surge arresters«)
L
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »C«, 1 unit, leakage distance 58 inch, height 19 inch
C
1
Housing »F«, 1 unit, leakage distance 92 inch, height 28 inch
F
1
Housing »J«, 1 unit, leakage distance 150 inch, height 42 inch
J
1
Housing »M«, 1 unit, leakage distance 177 inch, height 49 inch
M
1
Housing »C+J«, 2 units, leakage distance 208 inch, height 61 inch
P
2
Housing »F+J«, 2 units, leakage distance 243 inch, height 70 inch
Q
2
Housing »F+M«, 2 units, leakage distance 269 inch, height 77 inch
R
2
Housing »2xJ«, 2 units, leakage distance 301 inch, height 84 inch
J
2
Housing »J+M«, 2 units, leakage distance 327 inch, height 91 inch
W
2
Housing »2xM«, 2 units, leakage distance 354 inch, height 98 inch
M
2
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole insulated
1
ø 10.0”, 3-hole grounded
5
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EL2
37
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
38
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
kJ/kVmcov
C
Protective level
Maximum discharge voltage
8/20µs
1.5 kA
kV cr
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
Arrester order number
8/20µs
40 kA
kV cr
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
3
2.55
E
9.0
2.0
6.2
6.5
6.8
7.2
8.0
9.1
5.8
5.9
3EL2 003 - 2PC31 - ….
6
5.10
E
9.0
2.0
12.4
13.0
13.5
14.4
16.0
18.1
11.5
11.8
3EL2 006 - 2PC31 - ….
9
7.65
E
9.0
2.0
18.6
19.4
20.3
21.6
24.0
27.2
17.3
17.7
3EL2 009 - 2PC31 - ….
10
8.4
E
9.0
2.0
20.6
21.6
22.6
24.0
26.6
30.2
19.2
19.7
3EL2 010 - 2PC31 - ….
12
10.2
E
9.0
2.0
24.8
25.9
27.1
28.8
32.0
36.3
23.0
23.6
3EL2 012 - 2PC31 - ….
15
12.7
E
9.0
2.0
31.0
32.4
33.8
36.0
40.0
45.4
28.8
29.5
3EL2 015 - 2PC31 - ….
18
15.3
E
9.0
2.0
37.2
38.9
40.6
43.2
48.0
54.4
34.6
35.4
3EL2 018 - 2PC31 - ….
21
17.0
E
9.0
2.0
43.3
45.4
47.4
50.4
55.9
63.5
40.3
41.3
3EL2 021 - 2PC31 - ….
24
19.5
E
9.0
2.0
49.5
51.8
54.1
57.6
63.9
72.6
46.1
47.2
3EL2 024 - 2PC31 - ….
27
22.0
E
9.0
2.0
55.7
58.3
60.9
64.8
71.9
81.6
51.8
53.1
3EL2 027 - 2PC31 - ….
30
24.4
E
9.0
2.0
61.9
64.8
67.7
72.0
79.9
90.7
57.6
59.0
3EL2 030 - 2PC31 - ….
36
29.0
E
9.0
2.0
74.3
77.8
81.2
86.4
95.9
109
69.1
70.8
3EL2 036 - 2PC31 - ….
39
31.5
E
9.0
2.0
80.5
84.2
88.0
93.6
104
118
74.9
76.8
3EL2 039 - 2PC31 - ….
45
36.5
E
9.0
2.0
92.9
97.2
102
108
120
136
86.4
88.6
3EL2 045 - 2PF31 - ….
48
39.0
E
9.0
2.0
99.1
104
108
115
128
145
92.2
94.5
3EL2 048 - 2PF31 - ….
54
42.0
E
9.0
2.0
111
117
122
130
144
163
104
106
3EL2 054 - 2PF31 - ….
60
48.0
E
9.0
2.0
124
130
135
144
160
181
115
118
3EL2 060 - 2PF31 - ….
72
57.0
E
9.0
2.0
149
156
162
173
192
218
138
142
3EL2 072 - 2PF31 - ….
90
70.0
E
9.0
2.0
186
194
203
216
240
272
173
177
3EL2 090 - 2PJ31 - ….
96
76.0
E
9.0
2.0
198
207
217
230
256
290
184
189
3EL2 096 - 2PJ31 - ….
96
76.0
F
11.0
2.4
192
199
208
221
243
265
179
183
3EL2 096 - 6PJ41 - ….
108
84.0
E
9.0
2.0
223
233
244
259
288
327
207
213
3EL2 108 - 2PJ31 - ….
111
88.0
E
9.0
2.0
229
240
250
266
296
336
213
218
3EL2 111 - 2PJ31 - ….
120
98.0
E
9.0
2.0
248
259
271
288
320
363
230
236
3EL2 120 - 2PJ31 - ….
132
106
E
9.0
2.0
272
285
298
317
352
399
253
260
3EL2 132 - 2PM31 - ….
144
115
E
9.0
2.0
297
311
325
346
384
435
276
283
3EL2 144 - 2PM31 - ….
168
131
E
9.0
2.0
347
363
379
403
448
508
323
331
3EL2 168 - 2PQ32 - ….
172
140
E
9.0
2.0
355
372
388
413
458
520
330
338
3EL2 172 - 2PQ32 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
346
354
3EL2 180 - 2PQ32 - ….
192
152
E
9.0
2.0
396
415
433
461
511
581
369
378
3EL2 192 - 2PQ32 - ….
192
152
E
9.0
2.0
396
415
433
461
511
581
369
378
3EL2 192 - 2PJ32 - ….
192
152
F
11.0
2.4
384
397
415
442
486
530
358
367
3EL2 192 - 6PQ42 - ….
192
152
F
11.0
2.4
384
397
415
442
486
530
358
367
3EL2 192 - 6PJ42 - ….
228
180
E
9.0
2.0
471
492
514
547
607
689
438
449
3EL2 228 - 2PJ32 - ….
240
190
E
9.0
2.0
495
518
541
576
639
726
461
472
3EL2 240 - 2PJ32 - ….
258
209
E
9.0
2.0
533
557
582
619
687
780
495
508
3EL2 258 - 2PW32 - ….
258
209
E
9.0
2.0
533
557
582
619
687
780
495
508
3EL2 258 - 2PM32 - ….
264
212
E
9.0
2.0
545
570
596
634
703
798
507
520
3EL2 264 - 2PM32 - ….
264
212
F
11.0
2.4
528
546
571
607
668
729
492
504
3EL2 264 - 6PW42 - ….
276
220
E
9.0
2.0
570
596
623
662
735
835
530
543
3EL2 276 - 2PM32 - ….
276
220
F
11.0
2.4
552
571
597
635
698
762
514
527
3EL2 276 - 6PM42 - ….
288
230
F
11.0
2.4
576
596
623
662
729
795
537
550
3EL2 288 - 6PM42 - ….
3EL2
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
58
19
1
2
-
1,306
32
A
58
19
1
2
-
1,306
32
A
58
19
1
2
-
1,306
32
A
58
19
1
2
-
1,306
32
A
58
19
2
3
-
1,306
33
A
58
19
2
3
-
1,306
33
A
58
19
3
4
-
1,306
35
A
58
19
4
5
-
1,306
35
A
58
19
4
5
-
1,306
36
A
58
19
5
6
-
1,306
36
A
58
19
6
7
-
1,306
36
A
58
19
7
9
-
1,306
37
A
58
19
8
10
-
1,306
38
A
92
28
9
11
-
893
45
A
92
28
10
12
-
893
45
A
92
28
12
13
-
893
47
A
92
28
16
18
-
893
48
A
92
28
16
18
-
893
49
A
150
42
21
24
-
593
62
A
150
42
31
34
-
593
63
A
150
42
21
24
-
593
64
A
150
42
31
34
-
593
66
A
150
42
31
34
-
593
66
A
150
42
31
34
-
593
67
A
177
49
50
56
-
508
74
A
177
49
50
56
-
508
76
A
243
70
50
56
-
356
104
B
243
70
50
56
-
356
104
B
243
70
50
56
-
356
105
B
243
70
50
56
-
356
108
B
301
84
50
56
-
296
108
B
243
70
50
56
-
356
110
B
301
84
50
56
-
296
110
B
301
84
59
66
-
296
123
B
301
84
59
66
-
296
126
B
327
91
68
77
24
273
134
C
354
98
68
77
31
254
140
C
354
98
68
77
31
254
140
C
327
91
68
77
24
273
140
C
354
98
68
77
31
254
142
C
354
98
68
77
31
254
146
C
354
98
68
77
31
254
149
C
3EL2
39
Figure A
40
3EL2
Figure B
Figure C
Line terminals
NEMA flat terminal
3EL2 …-…..-.X.. (hot dip galvanized)
3EL2 …-…..-.Y.. (stainless steel)
Mounting
Insulated
Grounded
3EL2 …-…..-…1
3EL2 …-…..-…5
3EL2
41
3EL3 Surge arrester with silicone
rubber housing and Cage Design™
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
• Transmission lines
Maximum values
kV
500
500
Maximum duty cycle voltage
kV
444
444
Maximum MCOV
kV
353
353
Lightning impulse classifying current
kA
15
20
G
J
kJ/kVMCOV
13
18
Single-impulse withstand rating
C
2.8
3.6
Rated short-circuit current
kA
65
65
High-current short-duration
kA
100
100
inch-lbf
58,238
58,238
Switching surge energy rating
Maximum design cantilever load (MDCL)
3EL3
3EL3
Highest nominal system voltage
Energy class
42
3EL3
3EL3 – order numbers
Data position
1
2
3
4
Order number
3
E
L
3
3
E
L
3
–
5
6
7
x
x
x
x
x
x
–
8
9
4
P
10 11 12
J
4
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Silicone rubber-housed surge arrester,
cage design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class G, Qs = 2.8 C, W = 13.0 kJ/kVMCOV
4
4
Energy class J, Qs = 3.6 C, W = 18.0 kJ/kVMCOV
4
5
Application
Line surge arrester (For more details refer to catalog »Line surge arresters«)
L
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »F«, 1 unit, leakage distance 97 inch, height 29 inch
F
1
Housing »G«, 1 unit, leakage distance 113 inch, height 33 inch
G
1
Housing »H«, 1 unit, leakage distance 128 inch, height 36 inch
H
1
Housing »J«, 1 unit, leakage distance 143 inch, height 40 inch
J
1
Housing »K«, 1 unit, leakage distance 159 inch, height 43 inch
K
1
Housing »L«, 1 unit, leakage distance 174 inch, height 47 inch
L
1
Housing »M«, 1 unit, leakage distance 189 inch, height 50 inch
M
1
Housing »2xG«, 2 units, leakage distance 226 inch, height 66 inch
G
2
Housing »2xH«, 2 units, leakage distance 256 inch, height 73 inch
H
2
Housing »2xJ«, 2 units, leakage distance 287 inch, height 80 inch
J
2
Housing »2xK«, 2 units, leakage distance 317 inch, height 87 inch
K
2
Housing »2xL«, 2 units, leakage distance 348 inch, height 94 inch
L
2
Housing »2xM«, 2 units, leakage distance 378 inch, height 101 inch
M
2
Housing »3xJ«, 3 units, leakage distance 430 inch, height 120 inch
J
3
Housing »3xK«, 3 units, leakage distance 476 inch, height 130 inch
K
3
Housing »3xL«, 3 units, leakage distance 522 inch, height 141 inch
L
3
Housing »3xM«, 3 units, leakage distance 568 inch, height 151 inch
M
3
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole grounded
5
ø 10.0”, 3-hole insulated
7
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EL3
43
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
44
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
Protective level
Maximum discharge voltage
kJ/kVmcov
C
8/20µs
1.5 kA
kV cr
Arrester order number
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
45/90µs
1 kA
kV cr
45/90µs
2 kA
kV cr
258
209
G
13.0
2.8
511
528
549
581
633
691
496
511
3EL3 258 - 4PK42 - ….
258
209
J
18.0
3.6
511
528
549
581
633
691
496
511
3EL3 258 - 4PK52 - ….
264
212
G
13.0
2.8
523
541
561
594
647
707
508
523
3EL3 264 - 4PK42 - ….
264
212
J
18.0
3.6
523
541
561
594
647
707
508
523
3EL3 264 - 4PL52 - ….
276
220
G
13.0
2.8
546
565
587
621
677
739
531
546
3EL3 276 - 4PL42 - ….
276
220
J
18.0
3.6
546
565
587
621
677
739
531
546
3EL3 276 - 4PL52 - ….
288
230
G
13.0
2.8
570
590
612
648
706
771
554
570
3EL3 288 - 4PL42 - ….
288
230
J
18.0
3.6
570
590
612
648
706
771
554
570
3EL3 288 - 4PL52 - ….
294
235
G
13.0
2.8
582
602
625
662
721
787
566
582
3EL3 294 - 4PL42 - ….
294
235
J
18.0
3.6
582
602
625
662
721
787
566
582
3EL3 294 - 4PM52 - ….
312
245
G
13.0
2.8
618
639
663
702
765
835
600
618
3EL3 312 - 4PJ43 - ….
312
245
J
18.0
3.6
618
639
663
702
765
835
600
618
3EL3 312 - 4PJ53 - ….
396
318
G
13.0
2.8
784
811
842
891
971
1,060
762
784
3EL3 396 - 4PL43 - ….
396
318
J
18.0
3.6
784
811
842
891
971
1,060
762
784
3EL3 396 - 4PL53 - ….
420
335
G
13.0
2.8
832
860
893
945
1,030
1,125
808
832
3EL3 420 - 4PK44 - ….
420
335
J
18.0
3.6
832
860
893
945
1,030
1,125
808
832
3EL3 420 - 4PK54 - ….
444
353
G
13.0
2.8
879
909
944
999
1,089
1,189
854
879
3EL3 444 - 4PK44 - ….
444
353
J
18.0
3.6
879
909
944
999
1,089
1,189
854
879
3EL3 444 - 4PK54 - ….
3EL3
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
317
87
59
66
24
670
216
C
317
87
59
66
24
670
222
C
317
87
59
66
24
670
218
C
348
94
59
66
24
620
230
C
348
94
68
77
24
620
227
C
348
94
68
77
24
620
234
C
348
94
68
77
24
620
231
C
348
94
68
77
24
620
238
C
348
94
68
77
24
620
234
C
378
101
68
77
31
577
245
C
430
120
76
85
31
486
283
D
430
120
76
85
31
486
291
D
522
141
97
111
39
413
341
D
522
141
97
111
39
413
351
D
634
174
97
111
59
335
409
E
634
174
97
111
59
335
420
E
634
174
109
125
59
335
418
E
634
174
109
125
59
335
428
E
3EL3
45
Figure A
46
3EL3
Figure B
Figure C
Figure D
Figure E
Line terminals
NEMA flat terminal
3EL3 …-…..-.X.. (hot dip galvanized)
3EL3 …-…..-.Y.. (stainless steel)
Mounting
Insulated
Grounded
3EL3 …-…..-…7
3EL3 …-…..-…5
3EL3
47
3EP5 Surge arrester
with porcelain housing
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
Maximum values
kV
69
69
Maximum duty cycle voltage
kV
72
72
Maximum MCOV
kV
57
57
Lightning impulse classifying current
kA
10
10
C
E
kJ/kVMCOV
6.0
9.0
Single-impulse withstand rating
C
1.2
2.0
Rated short-circuit current
kA
40
40
High-current short-duration
kA
65
65
inch-lbf
21,242
21,242
Switching surge energy rating
Ultimate mechanical strength-static (UMS-static)
3EP5
3EP5
Highest nominal system voltage
Energy class
48
3EP5
3EP5 – order numbers
Data position
1
2
3
4
Order number
3
E
P
5
3
E
P
5
–
5
6
7
x
x
x
x
x
x
–
8
9
2
P
10 11 12
E
3
1
–
13 14 15 16
3
X
H
5
–
Z
–
Z
Product line
Porcelain-housed surge arrester
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class C, Qs = 1.2 C, W = 6.0 kJ/kVMCOV
1
2
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Application
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »C«, 1 unit, leakage distance 26 inch, height 14 inch
C
1
Housing »E«, 1 unit, leakage distance 50 inch, height 22 inch
E
1
Housing »H«, 1 unit, leakage distance 74 inch, height 30 inch
H
1
Housing »J«, 1 unit, leakage distance 90 inch, height 35 inch
J
1
Form of sheds and color of porcelain
Normal sheds, gray porcelain, upright mounting
3
Normal sheds, gray porcelain, suspended mounting
7
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole insulated
1
ø 10.0”, 3-hole grounded
5
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EP5
49
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
kJ/kVmcov
C
Protective level
Maximum discharge voltage
8/20µs
1.5 kA
kV cr
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
Arrester order number
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
10
8.4
C
6.0
1.2
22.1
23.1
24.2
26.0
29.1
33.3
20.0
20.8
3EP5 010 - 1PC21 - ….
18
15.3
C
6.0
1.2
39.8
41.7
43.5
46.8
52.4
59.9
36.0
37.4
3EP5 018 - 1PC21 - ….
27
22.0
C
6.0
1.2
59.7
62.5
65.3
70.2
78.6
89.9
54.1
56.2
3EP5 027 - 1PC21 - ….
27
22.0
C
6.0
1.2
59.7
62.5
65.3
70.2
78.6
89.9
54.1
56.2
3EP5 027 - 1PE21 - ….
30
24.4
C
6.0
1.2
66.3
69.4
72.5
78.0
87.4
99.8
60.1
62.4
3EP5 030 - 1PE21 - ….
36
29.0
C
6.0
1.2
79.6
83.3
87.0
93.6
105
120
72.1
74.9
3EP5 036 - 1PE21 - ….
39
31.5
C
6.0
1.2
86.2
90.2
94.3
101
114
130
78.1
81.1
3EP5 039 - 1PE21 - ….
45
36.5
E
9.0
2.0
92.9
97.2
102
108
120
136
86.4
88.6
3EP5 045 - 2PE31 - ….
48
39.0
E
9.0
2.0
99.1
104
108
115
128
145
92.2
94.5
3EP5 048 - 2PE31 - ….
54
42.0
E
9.0
2.0
111
117
122
130
144
163
104
106
3EP5 054 - 2PH31 - ….
60
48.0
E
9.0
2.0
124
130
135
144
160
181
115
118
3EP5 060 - 2PH31 - ….
72
57.0
E
9.0
2.0
149
156
162
173
192
218
138
142
3EP5 072 - 2PH31 - ….
Line terminals
NEMA flat terminal
3EP5 …-…..-.X.. (hot dip galvanized)
Figure A
50
3EP5
3EP5 …-…..-.Y.. (stainless steel)
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
26
14
2
3
-
1,466
46
A
26
14
3
4
-
1,466
47
A
26
14
6
7
-
1,466
49
A
50
22
6
7
-
953
63
A
50
22
6
7
-
953
63
A
50
22
8
10
-
953
64
A
50
22
9
11
-
953
64
A
50
22
9
11
-
953
68
A
50
22
10
12
-
953
68
A
74
30
12
13
-
706
83
A
74
30
16
18
-
706
84
A
74
30
16
18
-
706
86
A
Mounting
Insulated
Grounded
3EP5 …-…..-…1
3EP5 …-…..-…5
3EP5
51
3EP4 Surge arrester
with porcelain housing
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
Maximum values
3EP4
Highest nominal system voltage
kV
345
Maximum duty cycle voltage
kV
276
Maximum MCOV
kV
220
Lightning impulse classifying current
kA
10
Energy class
kJ/kVMCOV
9.0
Single-impulse withstand rating
C
2.0
Rated short-circuit current
kA
65
High-current short-duration
kA
65
inch-lbf
47,794
Switching surge energy rating
Ultimate mechanical strength-static (UMS-static)
52
3EP4
E
3EP4 – order numbers
Data position
1
2
3
4
Order number
3
E
P
4
3
E
P
4
–
5
6
7
x
x
x
x
x
x
–
8
9
2
P
10 11 12
E
3
1
–
13 14 15 16
3
X
H
5
–
Z
–
Z
Product line
Porcelain-housed surge arrester
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class C, Qs = 1.2 C, W = 6.0 kJ/kVMCOV
1
2
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Application
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »B«, 1 unit, leakage distance 19 inch, height 15 inch
B
1
Housing »C«, 1 unit, leakage distance 39 inch, height 22 inch
C
1
Housing »D«, 1 unit, leakage distance 98 inch, height 41 inch
D
1
Housing »E«, 1 unit, leakage distance 134 inch, height 52 inch
E
1
Housing »F«, 1 unit, leakage distance 151 inch, height 57 inch
F
1
Housing »2xD«, 2 units, leakage distance 196 inch, height 83 inch
D
2
Housing »2xE«, 2 units, leakage distance 268 inch, height 104 inch
E
2
Housing »2xF«, 2 units, leakage distance 302 inch, height 115 inch
F
2
Form of sheds and color of porcelain
Normal sheds, gray porcelain, upright mounting
3
Normal sheds, gray porcelain, suspended mounting
7
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole grounded
5
ø 10.0”, 3-hole insulated
7
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EP4
53
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
54
MCOV
Energy
class
Switching Singlesurge
impulse
energy withstand
rating
rating
Protective level
Maximum discharge voltage
Arrester order number
kJ/kVmcov
C
8/20µs
1.5 kA
kV cr
E
9.0
2.0
111
117
122
130
144
163
104
106
3EP4 054 - 2PD31 - ….
E
9.0
2.0
124
130
135
144
160
181
115
118
3EP4 060 - 2PD31 - ….
57.0
E
9.0
2.0
149
156
162
173
192
218
138
142
3EP4 072 - 2PD31 - ….
90
70.0
E
9.0
2.0
186
194
203
216
240
272
173
177
3EP4 090 - 2PD31 - ….
96
76.0
E
9.0
2.0
198
207
217
230
256
290
184
189
3EP4 096 - 2PD31 - ….
108
84.0
E
9.0
2.0
223
233
244
259
288
327
207
213
3EP4 108 - 2PE31 - ….
111
88.0
E
9.0
2.0
229
240
250
266
296
336
213
218
3EP4 111 - 2PE31 - ….
120
98.0
E
9.0
2.0
248
259
271
288
320
363
230
236
3EP4 120 - 2PE31 - ….
132
106
E
9.0
2.0
272
285
298
317
352
399
253
260
3EP4 132 - 2PE31 - ….
144
115
E
9.0
2.0
297
311
325
346
384
435
276
283
3EP4 144 - 2PF31 - ….
168
131
E
9.0
2.0
347
363
379
403
448
508
323
331
3EP4 168 - 2PD32 - ….
172
140
E
9.0
2.0
355
372
388
413
458
520
330
338
3EP4 172 - 2PD32 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
346
354
3EP4 180 - 2PD32 - ….
192
152
E
9.0
2.0
396
415
433
461
511
581
369
378
3EP4 192 - 2PD32 - ….
228
180
E
9.0
2.0
471
492
514
547
607
689
438
449
3EP4 228 - 2PE32 - ….
240
190
E
9.0
2.0
495
518
541
576
639
726
461
472
3EP4 240 - 2PF32 - ….
258
209
E
9.0
2.0
533
557
582
619
687
780
495
508
3EP4 258 - 2PF32 - ….
264
212
E
9.0
2.0
545
570
596
634
703
798
507
520
3EP4 264 - 2PF32 - ….
kV
kV
54
42.0
60
48.0
72
3EP4
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
98
41
12
13
-
1,156
101
A
98
41
16
18
-
1,156
102
A
98
41
16
18
-
1,156
105
A
98
41
21
24
-
1,156
108
A
98
41
31
34
-
1,156
109
A
134
52
31
34
-
923
138
A
134
52
31
34
-
923
138
A
134
52
31
34
-
923
139
A
134
52
50
56
-
923
142
A
151
57
50
56
-
831
155
A
196
83
50
56
-
578
227
B
196
83
50
56
-
578
227
B
196
83
50
56
-
578
228
B
196
83
50
56
-
578
231
B
268
104
59
66
31
462
291
C
302
115
59
66
31
416
320
C
302
115
68
77
31
416
324
C
302
115
68
77
31
416
325
C
3EP4
55
Figure A
56
3EP4
Figure B
Figure C
Line terminals
NEMA flat terminal
3EP4 …-…..-.X.. (hot dip galvanized)
3EP4 …-…..-.Y.. (stainless steel)
Mounting
Insulated
Grounded
3EP4 …-…..-…7
3EP4 …-…..-…5
3EP4
57
3EP6 Surge arrester
with porcelain housing
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
Maximum values
3EP6
kV
345
500
765
Maximum duty cycle voltage
kV
288
444
588
Maximum MCOV
kV
230
353
470
Lightning impulse classifying current
kA
10
15
20
E
G
J
kJ/kVMCOV
9.0
13
18
Single-impulse withstand rating
C
2.0
2.8
3.6
Rated short-circuit current
kA
65
65
65
High-current short-duration
kA
65
65
100
inch-lbf
191,175
191,175
191,175
Switching surge energy rating
Ultimate mechanical strength-static
(UMS-static)
3EP6
3EP6
Highest nominal system voltage
Energy class
58
3EP6
3EP6 – order numbers
Data position
1
2
3
4
Order number
3
E
P
6
3
E
P
6
–
5
6
7
x
x
x
x
x
x
–
8
9
2
P
10 11 12
F
3
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Porcelain-housed surge arrester
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Energy class G, Qs = 2.8 C, W = 13.0 kJ/kVMCOV
3
4
Energy class J, Qs = 3.6 C, W = 18.0 kJ/kVMCOV
4
5
Application
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »C«, 1 unit, leakage distance 155 inch, height 51 inch
C
1
Housing »D«, 1 unit, leakage distance 177 inch, height 57 inch
D
1
Housing »F«, 1 unit, leakage distance 229 inch, height 69 inch
F
1
Housing »G«, 1 unit, leakage distance 249 inch, height 74 inch
G
1
Housing »J«, 1 unit, leakage distance 302 inch, height 86 inch
J
1
Housing »2xD«, 2 units, leakage distance 355 inch, height 115 inch
D
2
Housing »D+F«, 2 units, leakage distance 406 inch, height 127 inch
N
2
Housing »D+G«, 2 units, leakage distance 427 inch, height 131 inch
P
2
Housing »2xF«, 2 units, leakage distance 457 inch, height 138 inch
F
2
Housing »2xG«, 2 units, leakage distance 499 inch, height 147 inch
G
2
Housing »F+J«, 2 units, leakage distance 531 inch, height 155 inch
R
2
Housing »G+J«, 2 units, leakage distance 551 inch, height 160 inch
S
2
Housing »2xJ«, 2 units, leakage distance 604 inch, height 173 inch
J
2
Housing »3xF«, 3 units, leakage distance 686 inch, height 207 inch
F
3
Housing »3xG«, 3 units, leakage distance 748 inch, height 221 inch
G
3
Housing »3xJ«, 3 units, leakage distance 906 inch, height 259 inch
J
3
Form of sheds and color of porcelain
Alternating sheds, gray porcelain, upright mounting
4
Alternating sheds, gray porcelain, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole grounded
5
ø 16.5”, 3-hole grounded
6
ø 10.0”, 3-hole insulated
7
ø 16.5”, 3-hole insulated
8
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EP6
59
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
kV
60
MCOV
Energy
class
kV
Switching Singlesurge
impulse
energy withstand
rating
rating
Protective level
Maximum discharge voltage
kJ/kVmcov
C
8/20µs
1.5 kA
kV cr
Arrester order number
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
45/90µs
1 kA
kV cr
45/90µs
2 kA
kV cr
108
84.0
E
9.0
2.0
223
233
244
259
288
327
213
223
3EP6 108 - 2PC31 - ….
111
88.0
E
9.0
2.0
229
240
250
266
296
336
218
229
3EP6 111 - 2PC31 - ….
120
98.0
E
9.0
2.0
248
259
271
288
320
363
236
248
3EP6 120 - 2PC31 - ….
132
106
E
9.0
2.0
272
285
298
317
352
399
260
272
3EP6 132 - 2PC31 - ….
144
115
E
9.0
2.0
297
311
325
346
384
435
283
297
3EP6 144 - 2PC31 - ….
168
131
E
9.0
2.0
347
363
379
403
448
508
331
347
3EP6 168 - 2PD31 - ….
172
140
E
9.0
2.0
355
372
388
413
458
520
338
355
3EP6 172 - 2PD31 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
354
372
3EP6 180 - 2PF31 - ….
192
152
E
9.0
2.0
396
415
433
461
511
581
378
396
3EP6 192 - 2PF31 - ….
228
180
E
9.0
2.0
471
492
514
547
607
689
449
471
3EP6 228 - 2PG31 - ….
240
190
E
9.0
2.0
495
518
541
576
639
726
472
495
3EP6 240 - 2PJ31 - ….
258
209
E
9.0
2.0
533
557
582
619
687
780
508
533
3EP6 258 - 2PJ31 - ….
258
209
G
13.0
2.8
527
546
570
606
667
728
503
527
3EP6 258 - 3PJ41 - ….
264
212
E
9.0
2.0
545
570
596
634
703
798
520
545
3EP6 264 - 2PJ31 - ….
264
212
G
13.0
2.8
540
558
583
620
682
744
515
540
3EP6 264 - 3PJ41 - ….
276
220
E
9.0
2.0
570
596
623
662
735
835
543
570
3EP6 276 - 2PD32 - ….
276
220
G
13.0
2.8
564
584
610
649
713
778
538
564
3EP6 276 - 3PD42 - ….
288
230
E
9.0
2.0
594
622
650
691
767
871
567
594
3EP6 288 - 2PN32 - ….
288
230
G
13.0
2.8
589
609
636
677
744
812
562
589
3EP6 288 - 3PN42 - ….
396
318
G
13.0
2.8
810
838
875
931
1,024
1,117
772
810
3EP6 396 - 3PJ42 - ….
396
318
J
18.0
3.6
784
811
842
891
971
1,060
762
784
3EP6 396 - 4PS52 - ….
420
335
G
13.0
2.8
859
888
928
987
1,086
1,184
819
859
3EP6 420 - 3PJ42 - ….
420
335
J
18.0
3.6
832
860
893
945
1,030
1,125
808
832
3EP6 420 - 4PJ52 - ….
444
353
G
13.0
2.8
908
939
981
1,043
1,148
1,252
866
908
3EP6 444 - 3PF43 - ….
444
353
J
18.0
3.6
879
909
944
999
1,089
1,189
854
879
3EP6 444 - 4PF53 - ….
468
372
G
13.0
2.8
957
990
1,034
1,100
1,210
1,320
913
957
3EP6 468 - 3PF43 - ….
468
372
J
18.0
3.6
927
958
995
1,053
1,148
1,253
900
927
3EP6 468 - 4PF53 - ….
576
462
J
18.0
3.6
1,140
1,179
1,225
1,296
1,413
1,542
1,108
1,140
3EP6 576 - 4PJ53 - ….
588
470
J
18.0
3.6
1,164
1,204
1,250
1,323
1,442
1,574
1,131
1,164
3EP6 588 - 4PJ53 - ….
3EP6
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
155
51
31
34
-
3,738
338
A
155
51
31
34
-
3,738
338
A
155
51
31
34
-
3,738
339
A
155
51
50
56
-
3,738
341
A
155
51
50
56
-
3,738
344
A
177
57
50
56
-
3,328
378
A
177
57
50
56
-
3,328
378
A
229
69
50
56
-
2,776
440
A
229
69
50
56
-
2,776
442
A
249
74
59
66
-
2,598
475
A
302
86
59
66
-
2,218
542
A
302
86
68
77
31
2,218
553
B
302
86
68
77
31
2,218
593
B
302
86
68
77
31
2,218
554
B
302
86
68
77
31
2,218
595
B
355
115
68
77
31
1,661
698
C
355
115
68
77
31
1,661
741
C
406
127
76
85
39
1,511
766
C
406
127
68
77
39
1,511
810
C
604
173
97
111
47
1,108
1,093
C
551
160
97
111
47
1,195
1,058
C
604
173
109
125
47
1,108
1,101
C
604
173
97
111
47
1,108
1,133
C
686
207
109
125
59
923
974
D
686
207
109
125
59
923
1,006
D
686
207
109
125
59
923
983
D
686
207
109
125
59
923
1,017
D
906
259
109
125
83
738
1,322
D
906
259
109
125
83
738
1,322
D
3EP6
61
Figure A
Figure B
Line terminals
NEMA flat terminal
3EP6 …-…..-.X.. (hot dip galvanized)
3EP6 …-…..-.Y.. (stainless steel)
62
3EP6
Figure C
Figure D
Mounting
Grounded
Insulated
3EP6 …-…..-…5
3EP6 …-…..-…7
Grounded
Insulated
3EP6 …-…..-…6
3EP6 …-…..-…8
3EP6
63
3EQ1 Surge arrester with
composite hollow core design
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
Maximum values
kV
115
230
Maximum duty cycle voltage
kV
96
192
Maximum MCOV
kV
76.8
152
Lightning impulse classifying current
kA
10
10
C
E
kJ/kVMCOV
6.0
9.0
Single-impulse withstand rating
C
1.2
2.0
Rated short-circuit current
kA
40
40
High-current short-duration
kA
65
65
inch-lbf
37,173
37,173
Switching surge energy rating
Maximum design cantilever load (MDCL)
3EQ1
3EQ1
Highest nominal system voltage
Energy class
64
3EQ1
3EQ1 – order numbers
Data position
1
2
3
4
Order number
3
E
Q
1
3
E
Q
1
–
5
6
7
x
x
x
x
x
x
–
8
9
2
P
10 11 12
J
3
1
–
13 14 15 16
4
X
H
5
–
Z
–
Z
Product line
Silicone rubber-housed surge arrester,
hollow core design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class C, Qs = 1.2 C, W = 6.0 kJ/kVMCOV
1
2
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Application
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »B«, 1 unit, leakage distance 82 inch, height 35 inch
B
1
Housing »E«, 1 unit, leakage distance 104 inch, height 41 inch
E
1
Housing »J«, 1 unit, leakage distance 133 inch, height 49 inch
J
1
Housing »P«, 1 unit, leakage distance 170 inch, height 58 inch
P
1
Housing »S«, 1 unit, leakage distance 193 inch, height 64 inch
S
1
Housing »2xJ«, 2 units, leakage distance 267 inch, height 97 inch
J
2
Housing »2xP«, 2 units, leakage distance 341 inch, height 117 inch
P
2
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole grounded
5
ø 10.0”, 3-hole insulated
7
Customized solution
9
Accessories
Refer to table »Accessories for surge arresters« on page 74
3EQ1
65
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
MCOV
Energy
class
Switching Singlesurge
impulse
energy withstand
rating
rating
Protective level
Maximum discharge voltage
Arrester order number
kJ/kVmcov
C
8/20µs
1.5 kA
kV cr
C
6.0
1.2
66.3
69.4
72.5
78.0
87.4
99.8
60.1
62.4
3EQ1 030 - 1PB21 - ….
E
9.0
2.0
61.9
64.8
67.7
72.0
79.9
90.7
57.6
59.0
3EQ1 030 - 2PB31 - ….
29.0
C
6.0
1.2
79.6
83.3
87.0
93.6
105
120
72.1
74.9
3EQ1 036 - 1PB21 - ….
39
31.5
C
6.0
1.2
86.2
90.2
94.3
101
114
130
78.1
81.1
3EQ1 039 - 1PB21 - ….
45
36.5
E
9.0
2.0
92.9
97.2
102
108
120
136
86.4
88.6
3EQ1 045 - 2PB31 - ….
48
39.0
E
9.0
2.0
99.1
104
108
115
128
145
92.2
94.5
3EQ1 048 - 2PB31 - ….
54
42.0
E
9.0
2.0
111
117
122
130
144
163
104
106
3EQ1 054 - 2PB31 - ….
60
48.0
E
9.0
2.0
124
130
135
144
160
181
115
118
3EQ1 060 - 2PB31 - ….
72
57.0
E
9.0
2.0
149
156
162
173
192
218
138
142
3EQ1 072 - 2PB31 - ….
90
70.0
E
9.0
2.0
186
194
203
216
240
272
173
177
3EQ1 090 - 2PE31 - ….
96
76.0
E
9.0
2.0
198
207
217
230
256
290
184
189
3EQ1 096 - 2PE31 - ….
108
84.0
E
9.0
2.0
223
233
244
259
288
327
207
213
3EQ1 108 - 2PJ31 - ….
111
88.0
E
9.0
2.0
229
240
250
266
296
336
213
218
3EQ1 111 - 2PJ31 - ….
120
98.0
E
9.0
2.0
248
259
271
288
320
363
230
236
3EQ1 120 - 2PJ31 - ….
132
106
E
9.0
2.0
272
285
298
317
352
399
253
260
3EQ1 132 - 2PJ31 - ….
144
115
E
9.0
2.0
297
311
325
346
384
435
276
283
3EQ1 144 - 2PP31 - ….
168
131
E
9.0
2.0
347
363
379
403
448
508
323
331
3EQ1 168 - 2PP31 - ….
172
140
E
9.0
2.0
355
372
388
413
458
520
330
338
3EQ1 172 - 2PS31 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
346
354
3EQ1 180 - 2PS31 - ….
192
152
E
9.0
2.0
396
415
433
461
511
581
369
378
3EQ1 192 - 2PS31 - ….
kV
kV
30
24.4
30
24.4
36
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
8/20µs
40 kA
kV cr
45/90µs
500 A
kV cr
45/90µs
1 kA
kV cr
Line terminals
NEMA flat terminal
3EQ1 …-…..-.X.. (hot dip galvanized)
Figure A
66
3EQ1
3EQ1 …-…..-.Y.. (stainless steel)
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
82
35
6
7
-
1,067
53
A
82
35
6
7
-
1,067
54
A
82
35
8
10
-
1,067
54
A
82
35
9
11
-
1,067
54
A
82
35
9
11
-
1,067
58
A
82
35
10
12
-
1,067
58
A
82
35
12
13
-
1,067
59
A
82
35
16
18
-
1,067
60
A
82
35
16
18
-
1,067
61
A
104
41
21
24
-
912
70
A
104
41
31
34
-
912
71
A
133
49
31
34
-
765
78
A
133
49
31
34
-
765
78
A
133
49
31
34
-
765
79
A
133
49
50
56
-
765
82
A
170
58
50
56
-
636
87
A
170
58
50
56
-
636
94
A
193
64
50
56
-
577
98
A
193
64
50
56
-
577
99
A
193
64
50
56
-
577
102
A
Mounting
Grounded
Insulated
3EQ1 …-…..-…5
3EQ1 …-…..-…7
3EQ1
67
3EQ4 Surge arrester with
composite hollow core design
Technical datasheet
Protection of:
• Transformers
• Circuit breakers
• Generators
• Motors
• Capacitors
• Bushings
• Switchgear
Maximum values
3EQ4
3EQ4
3EQ4
3EQ4
Highest nominal system voltage
kV
345
500
765
765
Maximum duty cycle voltage
kV
288
444
588
588
Maximum MCOV
kV
230
353
470
470
Lightning impulse classifying current
kA
10
15
20
20
E
G
J
K
kJ/kVMCOV
9.0
13
18
21
Single-impulse withstand rating
C
2.0
2.8
3.6
6.0
Rated short-circuit current
kA
651)
651)
651)
65
High-current short-duration
kA
65
65
100
100
inch-lbf
130,106 /
235,430
130,106 /
235,430
130,106 /
235,430
130,106 /
235,430
Energy class
Switching surge energy rating
Maximum design cantilever load
(MDCL)
1)
68
Increased rated short-circuit current of 80 kA available on request
3EQ4
3EQ4 – order numbers
Data position
1
2
3
4
Order number
3
E
Q
4
3
E
Q
4
–
5
6
7
x
x
x
x
x
x
–
8
9
10 11 12
4
P
V
5
2
–
13 14 15 16
4
X
H
5
–
Z
Product line
Silicone rubber-housed surge arrester,
hollow core design
Duty cycle voltage in kV
Energy class, single-impulse withstand rating, switching surge energy rating
Energy class E, Qs = 2.0 C, W = 9.0 kJ/kVMCOV
2
3
Energy class G, Qs = 2.8 C, W = 13.0 kJ/kVMCOV
3
4
Energy class J, Qs = 3.6 C, W = 18.0 kJ/kVMCOV
4
5
Energy class K, Qs = 6.0 C, W = 21.0 kJ/kVMCOV
5
5
Application
Phase surge arrester
P
Housing size, number of units, leakage distance, height
Housing »D«, 1 unit, leakage distance 67 inch, height 34 inch
D
1
Housing »E«, 1 unit, leakage distance 82 inch, height 38 inch
E
1
Housing »H«, 1 unit, leakage distance 126 inch, height 50 inch
H
1
Housing »J«, 1 unit, leakage distance 139 inch, height 54 inch
J
1
Housing »K«, 1 unit, leakage distance 156 inch, height 57 inch
K
1
Housing »N«, 1 unit, leakage distance 200 inch, height 69 inch
N
1
Housing »P«, 1 unit, leakage distance 215 inch, height 73 inch
P
1
Housing »R«, 1 unit, leakage distance 244 inch, height 81 inch
R
1
Housing »R«, 1 unit, leakage distance 244 inch, height 81 inch, increased MDCL
R
5
Housing »S«, 1 unit, leakage distance 259 inch, height 85 inch
S
1
Housing »S«, 1 unit, leakage distance 259 inch, height 85 inch, increased MDCL
S
5
Housing »V«, 1 unit, leakage distance 304 inch, height 97 inch
V
1
Housing »V«, 1 unit, leakage distance 304 inch, height 97 inch, increased MDCL
V
5
Housing »2xN«, 2 units, leakage distance 400 inch, height 139 inch
N
2
Housing »2xN«, 2 units, leakage distance 400 inch, height 139 inch, increased MDCL
N
6
Housing »2xP«, 2 units, leakage distance 430 inch, height 146 inch
P
2
Housing »2xP«, 2 units, leakage distance 430 inch, height 146 inch, increased MDCL
P
6
Housing »2xR«, 2 units, leakage distance 489 inch, height 162 inch
R
2
Housing »2xS«, 2 units, leakage distance 519 inch, height 170 inch
S
2
Housing »2xS«, 2 units, leakage distance 519 inch, height 170 inch, increased MDCL
S
6
Housing »2xV«, 2 units, leakage distance 607 inch, height 194 inch
V
2
Housing »2xV«, 2 units, leakage distance 607 inch, height 194 inch, increased MDCL
V
6
Housing »3xP«, 3 units, leakage distance 645 inch, height 220 inch, increased MDCL
P
7
Housing »3xS«, 3 units, leakage distance 778 inch, height 255 inch, increased MDCL
S
7
Form of sheds and color of silicone rubber
Alternating sheds, gray silicone rubber, upright mounting
4
Alternating sheds, gray silicone rubber, suspended mounting
8
High-voltage terminal
NEMA 4-hole pad, 1.75”x1.75”, hot dip galvanized steel
X
NEMA 4-hole pad, 1.75”x1.75”, stainless steel
Y
Nameplate
English IEEE/ANSI
H
Mounting
ø 10.0”, 3-hole grounded (only with 12th position = 1, 2, 3)
5
ø 16.5”, 3-hole grounded (only with 12th position = 1, 2, 3)
6
ø 10.0”, 3-hole insulated (only with 12th position = 1, 2, 3)
7
ø 16.5”, 3-hole insulated (only with 12th position = 1, 2, 3)
8
ø 10.0”, 3-hole grounded, increased MDCL (only with 12th position = 5, 6, 7)
9
R4D
ø 16.5”, 3-hole grounded, increased MDCL (only with 12th position = 5, 6, 7)
9
R4E
ø 10.0”, 3-hole insulated, increased MDCL (only with 12th position = 5, 6, 7)
9
R4F
Accessories
Refer to table »Accessories for surge arresters« on page 74
–
Z
3EQ4
69
Ratings and specifications
Electrical characteristics
Duty cycle
voltage
70
MCOV
kV
kV
45
36.5
60
48.0
Energy
class
Switching Singlesurge
impulse
energy withstand
rating
rating
Protective level
Maximum discharge voltage
8/20µs
3 kA
kV cr
8/20µs
5 kA
kV cr
8/20µs
10 kA
kV cr
8/20µs
20 kA
kV cr
Arrester order number
kJ/kVmcov
C
8/20µs
1.5 kA
kV cr
8/20µs
40 kA
kV cr
45/90µs
1 kA
kV cr
45/90µs
2 kA
kV cr
E
9.0
2.0
92.9
97.2
102
108
120
136
88.6
92.9
3EQ4 045 - 2PD31 - ….
E
9.0
2.0
124
130
135
144
160
181
118
124
3EQ4 060 - 2PE31 - ….
3EQ4 090 - 2PH31 - ….
90
70.0
E
9.0
2.0
186
194
203
216
240
272
177
186
96
76.0
E
9.0
2.0
198
207
217
230
256
290
189
198
3EQ4 096 - 2PJ31 - ….
108
84.0
E
9.0
2.0
223
233
244
259
288
327
213
223
3EQ4 108 - 2PK31 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
354
372
3EQ4 180 - 2PN31 - ….
180
144
E
9.0
2.0
372
389
406
432
480
544
354
372
3EQ4 180 - 2PV31 - ….
180
144
G
13.0
2.8
368
381
398
423
465
508
351
368
3EQ4 180 - 3PR41 - ….
228
180
E
9.0
2.0
471
492
514
547
607
689
449
471
3EQ4 228 - 2PV31 - ….
258
209
E
9.0
2.0
533
557
582
619
687
780
508
533
3EQ4 258 - 2PV31 - ….
258
209
G
13.0
2.8
527
546
570
606
667
728
503
527
3EQ4 258 - 3PV41 - ….
258
209
J
18.0
3.6
511
528
549
581
633
691
496
511
3EQ4 258 - 4PM52 - ….
276
220
E
9.0
2.0
570
596
623
662
735
835
543
570
3EQ4 276 - 2PV31 - ….
276
220
E
9.0
2.0
570
596
623
662
735
835
543
570
3EQ4 276 - 2PN32 - ….
276
220
G
13.0
2.8
564
584
610
649
713
778
538
564
3EQ4 276 - 3PN42 - ….
276
220
J
18.0
3.6
546
565
587
621
677
739
531
546
3EQ4 276 - 4PR52 - ….
288
230
E
9.0
2.0
594
622
650
691
767
871
567
594
3EQ4 288 - 2PN32 - ….
288
230
G
13.0
2.8
589
609
636
677
744
812
562
589
3EQ4 288 - 3PN42 - ….
288
230
J
18.0
3.6
570
590
612
648
706
771
554
570
3EQ4 288 - 4PV51 - ….
396
318
J
18.0
3.6
784
811
842
891
971
1,060
762
784
3EQ4 396 - 4PV52 - ….
396
318
J
18.0
3.6
784
811
842
891
971
1,060
762
784
3EQ4 396 - 4PV56 - ….
420
335
J
18.0
3.6
832
860
893
945
1,030
1,125
808
832
3EQ4 420 - 4PV52 - ….
420
335
J
18.0
3.6
832
860
893
945
1,030
1,125
808
832
3EQ4 420 - 4PV56 - ….
444
353
J
18.0
3.6
879
909
944
999
1,089
1,189
854
879
3EQ4 444 - 4PV52 - ….
444
353
J
18.0
3.6
879
909
944
999
1,089
1,189
854
879
3EQ4 444 - 4PV56 - ….
588
470
J
18.0
3.6
1,164
1,204
1,250
1,323
1,442
1,574
1,131
1,164
3EQ4 588 - 4PS57 - ….
3EQ4
Mechanical characteristics
Leakage
distance
Height
[H]
Recommended minimum
clearances
Between
phases
(ph-ph)
inch
Grading ring
diameter
[D]
Cantilever
strength
MDCL
Weight
Figure
inch
inch
To ground
(ph-gnd)
inch
inch
lbf
lbs
67
34
9
11
-
3,843
203
82
38
16
18
-
3,442
208
A
126
50
21
24
-
2,623
220
A
139
54
31
34
-
2,430
224
A
156
57
31
34
-
2,263
229
A
200
69
50
56
-
1,878
251
A
304
97
50
56
-
1,343
279
A
244
81
50
56
-
1,604
287
A
304
97
59
66
-
1,343
290
A
304
97
68
77
-
1,343
297
A
304
97
68
77
-
1,343
319
A
371
131
59
66
39
995
472
B
304
97
68
77
-
1,343
302
A
400
139
68
77
39
939
441
B
400
139
68
77
39
939
466
B
489
162
68
77
47
802
506
B
400
139
76
85
39
939
443
B
400
139
68
77
39
939
469
B
304
97
68
77
-
1,343
346
A
607
194
97
111
59
672
580
B
607
194
97
111
59
1,215
580
B
607
194
97
111
59
672
588
B
607
194
97
111
59
1,215
588
B
607
194
109
125
59
672
596
B
607
194
109
125
59
1,215
596
B
778
255
109
125
83
923
785
C
A
3EQ4
71
Figure A
Figure B
Line terminals
NEMA flat terminal
3EQ4 …-…..-.X.. (hot dip galvanized)
3EQ4 …-…..-.Y.. (stainless steel)
72
3EQ4
Figure C
Mounting
Grounded
Insulated
3EQ4 …-…..-…5
3EQ4 …-…..-…7
Grounded
Insulated
3EQ4 …-…..-…6
3EQ4 …-…..-…8
3EQ4
73
Accessories for surge arresters
Siemens surge arresters can optionally be equipped with one or more accessories, listed in the table below.
The selected code for the accessory should be added to the order number of the surge arrester.
Example: 3EL2 096-2PJ31-4XH5-Z D91 D92.
Accessories
Code
Earth terminal, copper tin-plated
D51
DIN/NEMA earth terminal
D71
Adapter DIN/NEMA to double DIN
flat terminal, including 2 line clamps
D81
Adapter DIN/NEMA to double NEMA flat terminal,
including 2 line clamps
D82
Line clamp
D91
Eyebolt earth terminal
D92
NEMA earth terminal, stainless steel
D93
NEMA earth terminal, copper
D94
Palm earth terminal, aluminum
D95
Earth terminal, 2x D14, stainless steel
D96
N2 filling
K02
Yellow cover panels for gas diverter
K14
Increased rated short-circuit current of 80 kA
K80
3EL5
3EL1
3EL2
3EL3
3EP5
3EP4
3EP6
3EQ1
3EQ4
Optional accessories
Monitoring devices for surge arresters
Surge arresters are highly reliable components in power
transmission and distribution systems. When operated
in accordance with their specifications, their service life
can span as much as 30 years without any maintenance.
Nevertheless, overloads may sometimes occur that can
cause arrester failure and even endanger the safety of
the network.
Monitors assist in the early detection of relevant changes
and support security of supply on a whole new level.
Siemens offers a complete line of monitoring devices with
a variety of innovative functionalities that can be perfectly
matched to the customer’s requirements, ensuring that
impending faults will be detected as early as possible and
before the security of supply is compromised.
74
Based on solid experience
Siemens has over 90 years of experience with surge
arresters – a solid foundation on which to build a comprehensive range of monitors that are precisely tailored to
today’s surge arrester technology. Siemens’ line of surge
arrester monitors ranges from simple counters and condition indicators to periodic analytic condition monitoring
and a future live condition monitoring system. All monitors provide the requisite information on surge arrester
responses and the arrester’s condition – perfectly matched
to the respective voltage level, network situation, and
customer requirements.
Surge counter
Order number: 3EX5 030-0
Surge counter with auxiliary contact
Order number: 3EX5 030-1
Surge counter with leakage current meter (0–30 mA)
Order number: 3EX5 050-0
Surge counter
Surge counter
with leakage
current meter
Surge counter with leakage current meter (0–30 mA) with auxiliary contact
Order number: 3EX5 050-1
Surge counter with leakage current meter (0–50 mA)
Order number: 3EX5 050-2
Arrester Condition Monitor (ACM) basic
Order number: 3EX5 080-0
Arrester Condition Monitor (ACM) advanced
Order number: 3EX5 080-1
Order number: 3EX5 086 (USB wireless module)
ACM basic
ACM advanced
Upgrade from ACM basic to ACM advanced
Order number: 3EX5 081
Sensor
Order number: 3EX5 060-1
Display
Order number: 3EX5 062-1
< 200m
Sensor
Display
Connecting lead (required for operation)
Length 3 m. Order number: 3EX5 963-0D
Length 6 m. Order number: 3EX5 963-0G
Length 10 m. Order number: 3EX5 963-1A
Length 12 m. Order number: 3EX5 963-1C
Length 14 m. Order number: 3EX5 963-1E
Length 16 m. Order number: 3EX5 963-1G
Length 18 m. Order number: 3EX5 963-1J
Length 20 m. Order number: 3EX5 963-2A
Length 22 m. Order number: 3EX5 963-2C
Length 24 m. Order number: 3EX5 963-2E
Length 26 m. Order number: 3EX5 963-2G
Length 28 m. Order number: 3EX5 963-2J
Length 30 m. Order number: 3EX5 963-3A
Mounting bracket for surge counter
Order number: 3EX5 930
Connection cable for monitors
Order number: 3EX5 952
Earth lead
Order number: 3EX5 955
Monitoring devices
Please refer to our monitoring brochure for more information.
75
Published by
Siemens AG 2015
Energy Management
Freyeslebenstrasse 1
91058 Erlangen, Germany
Please contact us at:
Phone: +49 30 386 33 222
Fax:
+49 30 386 26 721
E-mail: arrester.energy@siemens.com
Article No. E50001-F630-A254-X-4A00
Printed in Germany
fb 6514 WÜ WS 01151.0
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.