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 Read the QR code with your QR code reader. 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