Wind power

Overvoltage protection for wind turbinesHighest system availability thanks to graded lightning and overvoltage protection

s

Answers for industry.

2

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 pro- tection can be achieved for every type of wind turbine. This prevents financial losses due to the failure of systems and devices.

Comprehensive risk assessmentBased 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 cur- rents and switching surges, a distinction is made between the various risk zones.

Requirement-based portfolioAll wind turbines need a multi-level pro-tection concept in order to ensure ade-quate protection of electrical equipment. Our type 1, 2 and 3 surge arresters cover every eventuality.

State-of-the-art safety and protection

Reliable protection thanks to graded lightning and over- voltage protection

High system availability thanks to remote signaling of device condition and simple replace-ment of modules

Protection of control systems thanks to overvoltage protec-tion for data lines

Highlights

Read the QR code with your QR code reader.

High system availabilityThrough remote signaling, devices that have been triggered can be signaled to the wind turbine’s communication system. This enables a fast response. The replace-able modules enable the overvoltage protection to be restored as quickly as possible.

Reliable protection of data linesIt 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.

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.

3

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 over-all height of up to 200 meters, they are at par-ticular 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 over-voltage protection system optimally tailored to the requirements of your wind turbine, you are always on the safe side.

4

Sophisticated protection concept

1

7

83

2

4in the base of the tower }

at the medium-voltage transformer

in the incoming-feeder cabinet

63

2

51

5

Safe and reliable protection devices

Protection of the main circuit

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.

Protection of auxiliary circuits

Suitable surge protection devices for a range of mains types and applications.

Protection of sensitive loads

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.

Protection of medium- voltage systems

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.

1

2

3

4

5

6

7

8

Protection of data and measuring systems

Surge protection devices for the protection of analog signal circuits and the lines of digital status signals. Special arresters for resistance-based temperature measuring sys- tems (e .g. Pt100) are available.

Protection of communication interfaces

Suitable surge protection de- vices 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.

Protection for Industrial Ethernet

Surge protection devices for communication systems based on Gigabit Ethernet, such as Profinet, EtherCAT, EtherNet/IP and EthernetPOWERLINK.

Protection for serial interfaces

Surge protection devices for serial interfaces RS232 and RS485 with the correct Sub-D9 connection.

Energy Data

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 ground- fault compensation

Overvoltage protection1) for medium voltage systems in wind parks

500 ... 690 V AC IT system400 ... 690 V TN-C system

(application in the proximity of generator and converter; insensitive to voltage peaks)

500 ... 690 V AC IT system400 ... 690 V TN-C system

230 V AC TN-S system (1-phase)

230/400 V AC TN-S system

230/400 V AC TT system

230/400 V AC TN-C system

230/400 V AC IT system

24 V DC

24 V AC

60 V AC

120 V AC

230 V AC

230 V AC (3-phase)

03,6

07,2

12,0

15,5

24,0

30,0

36,0

40,5

48,3

52,0

72,5

3EK4 030-1CB4

3EK4 060-1CB4

3EK4 090-1CC4

3EK4 120-1CC4

3EK4 180-1CJ4

3EK4 240-1CK4

3EK4 270-1CM4

3EK4 330-1CR4

3EK7 390-4CH4

3EK7 420-4CH4

3EK7 570-4CK4

3EK4 060-1CB4

3EK4 090-1CC4

3EK4 150-1CF4

3EK4 210-1CJ4

3EK4 300-1CM4

3EK7 390-4CH4

3EK7 450-4CH4

3EK7 510-4CK4

3EK7 600-4CK4

–

–

3EK4 030-1CB4

3EK4 090-1CC4

3EK4 120-1CC4

3EK4 150-1CF4

3EK4 210-1CJ4

3EK4 270-1CM4

3EK4 330-1CR4

3EK4 360-1CR4

3EK7 480-4CK4

3EK7 540-4CK4

–

3EK4 060-1CB4

3EK4 090-1CC4

3EK4 150-1CF4

3EK4 210-1CJ4

3EK4 300-1CM4

3EK7 390-4CH4

3EK7 450-4CH4

3EK7 510-4CK4

3EK7 600-4CK4

–

–

Arrester type

Overvoltage protection with remote signaling

Fuse links

Back-up fuse for overvoltage protection

Fuse switch disconnectors

Maximum back-up fuse

Mains types / special features

Type 1, 1-pole

Type 2, 1-pole

Type 2, 3-pole

Type 2, 2-pole

Type 2, 4-pole

Type 2, 4-pole

Type 2, 3-pole

Type 2, 3-pole

Type 3, 2-pole

Type 3, 2-pole

Type 3, 2-pole

Type 3, 2-pole

Type 3, 2-pole

Type 3, 4-pole

5SD7 411-2 plus mounting set 5SD7 490-5

5SD7 481-1

5SD7 483-5

5SD7 422-1

5SD7 424-1

5SD7 424-1

5SD7 423-1

5SD7 473-1

5SD7 432-4

5SD7 432-4

5SD7 432-3

5SD7 432-2

5SD7 432-1

5SD7 434-1

5SE2 325

5SE2 325

5SE2 325

5SE2 325

5SE2 325

5SE2 325

5SG7 153

5SG7 153

5SG7 153

5SG7 153

5SG7 153

5SG7 163

25 A gG

25 A gG

25 A gG

25 A gG

25 A gG

25 A gG

3NA3 830-6

3NA3 830-6

V wiring: 3NA3 122-6

Stub wiring: 3NA3 132-6

3NP1 133-1CA10

3NP1 133-1CA10

3NP1 143-1DA10

100 A gG

100 A gG

V wiring: 63 A gG

Stub wiring: 125 A gG

V wiring: 3NA3 132-6

V wiring: 3NP1 143-1DA10

Stub wiring: 3NA3 360-6

Stub wiring: 3NP1 163-1DA10

Stub wiring: 400 A gG

Order number

Overvoltage protection for electric circuits in wind turbines

V wiring: 125 A gG

Power supply, UPS, controls, sensitive loads

Main circuit

Auxiliary circuits

1) No back-up fuse is required for 3EK. surge arresters. Additional arresters available on request. (www.siemens.com/energy/arrester)

Order number

7

Fieldbus PROFIBUS DP (2 lines) 5SD7 530-3 5SD7 512-1

Serial interfaces

Industrial Ethernet / LAN

ISDN / DSL / Phone

Interface

RS422

PROFIBUS DP on RS485

Modbus RTU on RS485

Interbus on RS485

RS485 (Sub-D9)

RS232 (2 lines)

Modbus RTU on RS232 (2 lines)

RS232 (Sub-D9)

Modbus RTU on RS232 (Sub-D9)

TTY

CAN

CANopen

DeviceNet

24 V power supply for CAN / CANopen / DeviceNet

AS-Interface

PROFINET

EtherCAT

EtherNet/IP

Ethernet POWERLINK

LAN Cat-6A / Gigabit Ethernet

Modbus TCP

ISDN S0-Bus

ISDN UK0-interface (single wire)

Analog telephony / ISDN UK0 / DSL / PABX (RJ45, RJ12, RJ11, single wire)

Order number

Plug-in part

5SD7 550-4

5SD7 550-4

5SD7 550-4

5SD7 550-4

5SD7 530-4

5SD7 530-4

5SD7 522-6

5SD7 530-4

5SD7 530-4

5SD7 530-4

5SD7 520-1

Basic element

5SD7 522-0

RS485 (4 lines) 5SD7 550-4 5SD7 522-0

RS485 (2 lines) 5SD7 550-4 5SD7 522-0

5SD7 522-0

5SD7 522-0

5SD7 522-0

5SD7 512-0

5SD7 512-0

5SD7 522-1

5SD7 512-1

5SD7 512-1

5SD7 512-1

5SD7 512-1

Surge arrester (complete unit)

5SD7 581-5

5SD7 581-6

5SD7 581-6

5SD7 432-4

3RK1 901-1GA01

5SD7 581-3

5SD7 581-3

5SD7 581-3

5SD7 581-3

5SD7 581-3

5SD7 581-3

5SD7 581-3

5SD7 581-2

Overvoltage protection1) of communication interfaces

Description

24 V switched signals

24 V switched signals

0...20mA // 4...20mA // 0...10 V

0...20mA // 4...20mA // 0...10 V

Pt100 // Pt500 // Pt1000

Pt100 // Pt500 // Pt1000

I/O line that exceeds LPZ limits

Plug-in part

5SD7 521-6

5SD7 541-7

5SD7 512-6

5SD7 522-7

5SD7 540-6

5SD7 540-6

5SD7 512-6

Basic element

5SD7 521-1

5SD7 541-1

5SD7 512-1

5SD7 522-1

5SD7 540-1

5SD7 540-1

5SD7 512-0

Examples of applications

Query circuits of auxiliary contacts (digital I/O), relay control, control of light signals, switched alarm circuits

Analog measuring circuits for pressure measurement, angle-of-rotation measurement, level measurement

Resistance-based temperature measurement of oil, coolant, transformer windings, etc.

Signal lines that pass through lightning protection zones

Overvoltage protection1) of data and measuring systems

Measurement cable

Digital I/O (2x I/O)

Digital I/O (4x I/O)

Analog I/O (1 signal line pair)

Analog I/O (2 signal line pair)

Resistance-based temperature measurement (4 lines)

Resistance-based temperature measurement (3 lines)

Primary protection of signal lines

Order number

1) No back-up fuse is required for the surge arresters.

Siemens AGInfrastructure & Cities SectorLow and Medium Voltage DivisionLow VoltageP. O. Box 10 09 5393009 RegensburgGermany

Order no. E10003-E38-2B-E0030-7600Dispo 25600 • 0812 • 5.0Printed in Germany

Subject to change.The information provided in this brochure contains de-scriptions 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 charac-teristics shall only exist if expressly agreed in the terms of contract.

All rights reserved.All product names may be brand names of Siemens Ltd oranother supplier whose use by third-parties for their ownpurposes may violate the owner‘s rights.

© Siemens AG 2012

www.siemens.com/lowvoltage/wind-power