s
Wind power
Overvoltage protection
for wind turbines
Highest system availability thanks to graded lightning
and overvoltage protection
Answers for industry.
State-of-the-art safety and
protection
Effective overvoltage protection
There are more than a million lightning
strikes each year – lightning strikes and
overvoltages can cause considerable
damage to wind turbines, even complete
outages. Thanks to our graded portfolio,
suitable lightning and overvoltage protection can be achieved for every type
of wind turbine. This prevents financial
losses due to the failure of systems and
devices.
Comprehensive risk assessment
Based on an in-depth risk assessment,
a lightning protection concept is drawn
up outlining the most efficient technical
measures for lightning protection. Taking
into account the lightning partial currents and switching surges, a distinction
is made between the various risk zones.
Requirement-based portfolio
All wind turbines need a multi-level protection concept in order to ensure adequate protection of electrical equipment.
Our type 1, 2 and 3 surge arresters cover
every eventuality.
High system availability
Through remote signaling, devices that
have been triggered can be signaled to
the wind turbine’s communication system.
This enables a fast response. The replaceable modules enable the overvoltage
protection to be restored as quickly as
possible.
Reliable protection of data lines
It is not only the supply circuit equipment
which needs to be protected – data lines
also require protection. Depending on
the communication medium, a range of
overvoltage protection devices are
implemented.
Highlights
Reliable
protection thanks to
graded lightning and overvoltage protection
High
system availability thanks
to remote signaling of device
condition and simple replacement of modules
Protection
of control systems
thanks to overvoltage protection for data lines
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Our sophisticated protection concept
for wind turbines offers a broad and
perfectly coordinated portfolio for
lightning and overvoltage protection.
Developed in accordance with the
respective international standards,
we deliver trendsetting design and
innovative functions in unrivalled
quality.
2
Extensive protection against damage
caused by lightning and overvoltage
Wind turbines are generally the highest point
in the landscape or in the water. With an overall height of up to 200 meters, they are at particular risk of being struck by lightning. It is
therefore essential to protect the electrical
systems of turbines against damage caused
by overvoltage. Our overvoltage protection
concept offers a wide range of suitable over-
voltage protection devices that reliably
prevent system failures caused by lightning
strikes, thus ensuring high operational
reliability and system availability. With our
products, systems and a lightning and overvoltage protection system optimally tailored
to the requirements of your wind turbine,
you are always on the safe side.
3
Sophisticated protection concept
3
8
2
7
1
3
5
6
2
in the base of the tower }
4
4
at the medium-voltage transformer
1
in the incoming-feeder cabinet
Safe and reliable protection devices
Energy
Data
Protection of the main
circuit
Protection of data and
measuring systems
Special arrester versions for
use in close proximity to the
generator and the converter.
They are leakage-current-free
and insensitive to operational
voltage peaks.
Surge protection devices
for the protection of analog
signal circuits and the lines of
digital status signals. Special
arresters for resistance-based
temperature measuring systems (e .g. Pt100) are available.
1
5
Protection of auxiliary
circuits
Protection of communication
interfaces
Suitable surge protection
devices for a range of mains
types and applications.
Suitable surge protection devices for all common fieldbus
systems, such as Profibus,
CAN, CANopen and DeviceNet.
Suitable arresters with RJ11,
RJ12, RJ45 sockets for the
protection of phone and ISDN
systems.
2
6
Protection of sensitive
loads
Protection for Industrial
Ethernet
Surge protection devices with
ultra strong voltage limitation
for the protection of sensitive
loads, such as UPS systems,
measuring instruments and
the power supply lines of
controls.
Surge protection devices for
communication systems based
on Gigabit Ethernet, such as
Profinet, EtherCAT, EtherNet/IP
and EthernetPOWERLINK.
3
7
Protection of mediumvoltage systems
Protection for serial
interfaces
3EK4 and 3K7 surge arresters
offer the best protection
against overvoltages in
medium-voltage distribution
grids up to a maximum
system voltage of 72.5 kV.
Surge protection devices for
serial interfaces RS232 and
RS485 with the correct Sub-D9
connection.
4
8
5
Overvoltage protection for electric circuits in wind turbines
Order number
Arrester
type
Mains types /
special features
Overvoltage
protection with
remote signaling
Back-up fuse for overvoltage protection
Fuse
links
Fuse switch
disconnectors
Maximum
back-up fuse
V wiring:
3NA3 132-6
V wiring:
3NP1 143-1DA10
V wiring:
125 A gG
Stub wiring:
3NA3 360-6
Stub wiring:
3NP1 163-1DA10
Stub wiring:
400 A gG
Main circuit
Type 1, 1-pole
5SD7 411-2
plus mounting set
5SD7 490-5
Type 2, 1-pole
5SD7 481-1
3NA3 830-6
3NP1 133-1CA10
100 A gG
Type 2, 3-pole
5SD7 483-5
3NA3 830-6
3NP1 133-1CA10
100 A gG
230 V AC TN-S system (1-phase)
Type 2, 2-pole
5SD7 422-1
230/400 V AC TN-S system
Type 2, 4-pole
5SD7 424-1
230/400 V AC TT system
Type 2, 4-pole
5SD7 424-1
500 ... 690 V AC IT system
400 ... 690 V TN-C system
(application in the proximity
of generator and converter;
insensitive to voltage peaks)
500 ... 690 V AC IT system
400 ... 690 V TN-C system
Auxiliary circuits
230/400 V AC TN-C system
Type 2, 3-pole
5SD7 423-1
230/400 V AC IT system
Type 2, 3-pole
5SD7 473-1
V wiring:
63 A gG
V wiring:
3NA3 122-6
3NP1 143-1DA10
Stub wiring:
125 A gG
Stub wiring:
3NA3 132-6
Power supply, UPS, controls, sensitive loads
24 V DC
Type 3, 2-pole
5SD7 432-4
5SE2 325
5SG7 153
25 A gG
24 V AC
Type 3, 2-pole
5SD7 432-4
5SE2 325
5SG7 153
25 A gG
60 V AC
Type 3, 2-pole
5SD7 432-3
5SE2 325
5SG7 153
25 A gG
120 V AC
Type 3, 2-pole
5SD7 432-2
5SE2 325
5SG7 153
25 A gG
230 V AC
Type 3, 2-pole
5SD7 432-1
5SE2 325
5SG7 153
25 A gG
230 V AC (3-phase)
Type 3, 4-pole
5SD7 434-1
5SE2 325
5SG7 163
25 A gG
Overvoltage protection1) for medium voltage systems in wind parks
Order number
1)
6
Maximum voltage for
equipment Um [kV]
System with grounded
neutral point
System with insulated
neutral point
System with low resistance
neutral point grounding
System with groundfault compensation
03,6
3EK4 030-1CB4
3EK4 060-1CB4
3EK4 030-1CB4
3EK4 060-1CB4
07,2
3EK4 060-1CB4
3EK4 090-1CC4
3EK4 090-1CC4
3EK4 090-1CC4
3EK4 150-1CF4
12,0
3EK4 090-1CC4
3EK4 150-1CF4
3EK4 120-1CC4
15,5
3EK4 120-1CC4
3EK4 210-1CJ4
3EK4 150-1CF4
3EK4 210-1CJ4
24,0
3EK4 180-1CJ4
3EK4 300-1CM4
3EK4 210-1CJ4
3EK4 300-1CM4
30,0
3EK4 240-1CK4
3EK7 390-4CH4
3EK4 270-1CM4
3EK7 390-4CH4
36,0
3EK4 270-1CM4
3EK7 450-4CH4
3EK4 330-1CR4
3EK7 450-4CH4
40,5
3EK4 330-1CR4
3EK7 510-4CK4
3EK4 360-1CR4
3EK7 510-4CK4
48,3
3EK7 390-4CH4
3EK7 600-4CK4
3EK7 480-4CK4
3EK7 600-4CK4
52,0
3EK7 420-4CH4
–
3EK7 540-4CK4
–
72,5
3EK7 570-4CK4
–
–
–
No back-up fuse is required for 3EK. surge arresters. Additional arresters available on request. (www.siemens.com/energy/arrester)
Overvoltage protection1) of communication interfaces
Order number
Serial interfaces
Interface
Plug-in part
Basic element
RS422
5SD7 550-4
5SD7 522-0
RS485 (4 lines)
5SD7 550-4
5SD7 522-0
RS485 (2 lines)
5SD7 550-4
5SD7 522-0
PROFIBUS DP on RS485
5SD7 550-4
5SD7 522-0
Modbus RTU on RS485
5SD7 550-4
5SD7 522-0
Interbus on RS485
5SD7 550-4
5SD7 522-0
RS232 (2 lines)
5SD7 530-4
5SD7 512-0
Modbus RTU on RS232 (2 lines)
5SD7 530-4
5SD7 512-0
RS485 (Sub-D9)
5SD7 581-5
RS232 (Sub-D9)
5SD7 581-6
Modbus RTU on RS232 (Sub-D9)
5SD7 581-6
5SD7 522-6
5SD7 522-1
PROFIBUS DP (2 lines)
5SD7 530-3
5SD7 512-1
CAN
5SD7 530-4
5SD7 512-1
CANopen
5SD7 530-4
5SD7 512-1
DeviceNet
5SD7 530-4
5SD7 512-1
TTY
Fieldbus
Industrial Ethernet / LAN
24 V power supply for
CAN / CANopen / DeviceNet
5SD7 432-4
AS-Interface
3RK1 901-1GA01
PROFINET
5SD7 581-3
EtherCAT
5SD7 581-3
EtherNet/IP
5SD7 581-3
Ethernet POWERLINK
5SD7 581-3
LAN Cat-6A / Gigabit Ethernet
5SD7 581-3
Modbus TCP
5SD7 581-3
ISDN S0-Bus
ISDN / DSL / Phone
Surge arrester
(complete unit)
5SD7 581-3
ISDN UK0-interface (single wire)
5SD7 520-1
5SD7 512-1
Analog telephony / ISDN UK0 / DSL / PABX
(RJ45, RJ12, RJ11, single wire)
5SD7 581-2
Overvoltage protection1) of data and measuring systems
Order number
1)
Measurement cable
Description
Plug-in part
Basic element
Examples of applications
Digital I/O (2x I/O)
24 V switched signals
5SD7 521-6
5SD7 521-1
Digital I/O (4x I/O)
24 V switched signals
5SD7 541-7
5SD7 541-1
Query circuits of auxiliary contacts
(digital I/O), relay control, control
of light signals, switched alarm
circuits
Analog I/O
(1 signal line pair)
0...20mA // 4...20mA // 0...10 V
5SD7 512-6
5SD7 512-1
Analog I/O
(2 signal line pair)
0...20mA // 4...20mA // 0...10 V
5SD7 522-7
5SD7 522-1
Resistance-based temperature
measurement (4 lines)
Pt100 // Pt500 // Pt1000
5SD7 540-6
5SD7 540-1
Resistance-based temperature
measurement (3 lines)
Pt100 // Pt500 // Pt1000
5SD7 540-6
5SD7 540-1
Primary protection of
signal lines
I/O line that exceeds
LPZ limits
5SD7 512-6
5SD7 512-0
No back-up fuse is required for the surge arresters.
Analog measuring circuits for
pressure measurement, angleof-rotation measurement, level
measurement
Resistance-based temperature
measurement of oil, coolant,
transformer windings, etc.
Signal lines that pass through
lightning protection zones
7
Siemens AG
Infrastructure & Cities Sector
Low and Medium Voltage Division
Low Voltage
P. O. Box 10 09 53
93009 Regensburg
Germany
Order no. E10003-E38-2B-E0030-7600
Dispo 25600 • 0812 • 5.0
Printed in Germany
Subject to change.
The information provided in this brochure contains descriptions or characteristics of performance which in case
of actual use do not always apply as described or which
may change as a result of further development of the
products. An obligation to provide the respective characteristics shall only exist if expressly agreed in the terms of
contract.
All rights reserved.
All product names may be brand names of Siemens Ltd or
another supplier whose use by third-parties for their own
purposes may violate the owner‘s rights.
© Siemens AG 2012
www.siemens.com/lowvoltage/wind-power