Surge Arresters Supply Program www.siemens.com/energy/arrester Answers for energy. Always the Best Solution We offer an extensive range of surge arresters suitable for every application – economical and ensuring stable continuous duty, with excellent protection levels and loading capacity. Developments in technology and practical experience have resulted in three different designs of surge arresters, which differ with regard to the housings used: ■■ Surge arresters with porcelain housings ■■ Surge arresters with polymer housings ■■ Surge arresters with metal enclosures. Siemens offers each of these three types of housing in various versions and this enables us to provide the optimum surge arrester for every conceivable application. Thus Siemens surge arresters can be specifically and optimally tailored to the following requirements and applications: ■■ Excellent pollution layer characteristics for coastal and desert regions or in areas with extreme industrial air pollution ■■ High mechanical stability, e.g. for use in seismic zones ■■ Extremely reliable pressure relief behavior for use in areas requiring special protection. What is more, all Siemens surge arresters are sized for decades of operation in their design and material used and provide a contribution towards the protection of the environment. Short delivery periods for fast availability Metal-enclosed 3ES surge arresters from Siemens. The 420-kV switchgear in Macclesfield/Great Britain was retrofitted with Siemens surge arresters in a very short time. 2 Surge Arresters for Every Requirement With our comprehensive supply program, we are able to offer the right arrester for every application – for economical and reliable operation. Our surge arresters protect transformers, generators, motors, capacitors, traction vehicles, and cables as well as complete switchgear. Arresters for special applications are possible, too. These include the following: ■■ For motors and dry-type transformers extremely sensitive to surges ■■ Vibration-resistant surge arresters and limiters for AC and DC traction systems ■■ High short-circuit-proof versions for generators in p ower plants ■■ Metal-enclosed versions for high-voltage gas-insulated switchgear ■■ For thyristors in HVDC transmission systems ■■ For capacitor batteries in static compensators ■■ For airfield lighting systems ■■ For electric furnaces in the glass and metal industries ■■ Line Surge Arresters Line surge arresters from Siemens reliably protect your overhead power lines. ■■ Maintained or better reliability when stepping up system voltages ■■ No need of further guard wires ■■ No need to replace existing insulators ■■ Fewer switching surges ■■ Cost-efficient solution For test bays. 3 Our Product Range is Being Continually Extended by Other Innovative Products Fig. above Innovative products for extreme requirements In Tian-Guang, China, Siemens odernized 4 sections of an HVDC m transmission system. The Siemens thyristor valves were protected by state-of-the-art 3EQ3 arresters. Fig. below Reliability under extreme climatic conditions In Montagnais, Canada, Siemens erected three advanced series 3-phase static compensators protected by arrester banks (consisting of parallel-connected multi-stack arresters) to improve the quality of power transmission. These arresters even withstand extreme temperatures of –50 °C to +40 °C. Fig. below right Resistant to wind and weather Our 3EQ surge arresters with polymeric composite housing are particularly resistant against contamination and all kinds of weather conditions. 4 Our arresters and limiters cover all areas of application. What is more, we are continuously adding innovative product ideas to our supply program – to the benefit of our customers. An example of this are surge arresters with polymeric composite housings. This housing consists of a glass-fiberreinforced plastic tube with a silicone rubber insulation. Thanks to its design and the high quality of the materials used, this arrester offers a number of advantages, such as absolutely reliable pressure relief behavior and high mechanical strength – even after pressure relief. Of particular advantage is the water-repellent effect of the silicone rubber which is also transmitted to pollution layers. Besides their high resistance in outdoor conditions, Siemens surge arresters with polymeric housings also have a long service life and can be disposed of in an uncomplicated manner. Siemens High-Voltage Surge Arresters with Polymeric Housing Siemens offers you two different arrester types with polymeric housing for standard applications as well as for applications with advanced or highest technical requirements: 3EL and 3EQ. Choosing one or the other, you will always get the best price-performance ratio whatever your application is. Our 3EL and 3EQ arresters use the same metal oxide varistors (MOV) as our arresters with porcelain housing resulting in the same excellent electrical performance. The use of polymeric housings consisting of FRP‘s and silicone rubber leads to additional advantages: ■■ ■■ ■■ ■■ ■■ ■■ ■■ ■■ Highly improved pollution performance and Flexibility of erection due to reduced weight. ■■ Silicone rubber has been used as outdoor insulation material for more than 25 years with good service experience even under severe climatic and environmental conditions. Today it is the most widely used polymeric material for HV outdoor equipment. Silicone is highly hydrophobic. There are many polymeric materials with hydrophobic properties, but most of them loose their hydrophobicity after a relatively short period. Only silicone has the ability to maintain its hydrophobicity during its lifetime. This results in a long service life of our 3EL and 3EQ arresters. The 3EL range Additional important properties of silicone are: ■■ ■■ ■■ ■■ ■■ The 3EQ range MOV Its resistance to tracking erosion and UV radiation that also enhances the working life of our arresters The fact that silicone is fire-retardant and self- extinguishing Silicone is directly molded onto MOV and fiber-glass rods ensuring total enclosure of all components to prevent from partial discharges or moisture ingress Good mechanical performance for standard applications Short circuit: Low-pressure escape of the arc due to the silicone shielding,no need of any pressure relief device Easy transport and installation due to considerably lower weight compared to porcelain arresters Suitable as station arrester and/or line surge arrester Design with FRP tube offers outstanding mechanical stability (much stronger than porcelain) combined with an excellent sealing system to prevent from moisture ingress and partial discharges Highest degree of safety in the event of short circuit due to pressure relief device, no ejection of any internal components At least 75 % mechanical strength retained even after short circuit, therefore arrester can be used as post insulator Less weight than comparable porcelain arresters Ideal for areas with potential seismic activity, heavy windloads and any other advanced mechanical requirements The 3EL range Siemens surge arresters of Cage Design™: cage of prestressed FRP rods for high mechanical strength, silicone directly molded onto MOV. Best price-performance ratio for applications up to Um = 420 kV*. FRP rods The 3EQ range FRP tube Silicone rubber sheds Siemens surge arresters of tube design: FRP tube for highest mechanical strength, silicone directly molded onto FRP tube. Best choice for applications up to Um = 1200 kV, especially applications with advanced or highest technical requirements. *Line surge arresters also up to 550 kV 5 Medium-Voltage Metal Oxide Surge 3EF1; 3EF1;3EF1; 3EF3; 3EF3; 3EF3;V to 72.5 kV Arresters and Limiters 300 3EE2 3EE2 3EE2 3EB2 3EB2 3EB2 3EF4; 3EF4;3EF4; 3EF5 3EF5 3EF5 3EC 3E Special applications 3EF1; 3EF3; 3EF4; 3EF5 Applications 3EB2 Motors, dry-type transformers, airfield lighting systems, sheath voltage limiters, protection of converters for drives Generators, motors, melting furnaces, 6-arrester connection, power plants DC overhead contact lines Nominal system voltage (max.) kV 10 30 1.5 Highest voltage for equipment (Um) kV 12 36 2 Maximum rated voltage kV 15 53 2 kA 3EF1 3EF3 3EF4 3EF5 1 1 10 10 10 10 kJ/kV 3EF1 3EF3 3EF4 3EF5 0.8 4 12.5 8 10 10 A 3EF4 3EF5 1500 1200 1200 1200 40 300 40 Housing material Polyethylene Porcelain Silicone Design principle 3EF1 – Polyethylene directly molded onto MOV; 3EF3/3EF4/3EF5 – Hollow insulator Hollow insulator Directly molded Pressure relief device no yes no Nominal discharge current Maximum thermal energy absorption capability (per kV of Ur) Maximum long-duration current impulse, 2 ms Rated short circuit current 6 3EE2 kA EB2 2 3EB2 3EB2 3EC3 3EB2 3EC3 3EC3 3EC3 3EB4 3EC3 3EB4 3EB4 3EB4 3EB1 3EB4 3EB1 3EB1 3EB1 3EK4 3EB1 3EK4 3EK4 3EK4 3EK7 3EK4 3EK7 3EK7 3EK73EK7 Railway applications 3EC3 Medium voltage Distribution class 3EB4 3EB1 3EK4 3EK7 DC systems (locomotives, overhead contact lines) AC and DC systems (locomotives, overhead contact lines) AC and DC systems (locomotives, overhead contact lines), for highest speed Distribution systems and medium-voltage switchgear Distribution systems and medium-voltage switchgear 3 60 25 36 60 4 72.5 30 45 72.5 4 60 (AC) 4 (DC) 37 (AC) 4 (DC) 36 60 10 10 10 10 10 10 8 (AC) 10 (DC) 10 3.51) 3.51) 1200 850 (AC) 1200 (DC) 850 (AC) 1200 (DC) 325 325 40 40 40 20 20 Porcelain Silicone Silicone Silicone Silicone Hollow insulator Hollow insulator, silicone directly molded onto FRP tube Hollow insulator, silicone directly molded onto FRP tube Cage design, silicone directly molded onto MOV Cage design, silicone directly molded onto MOV yes yes yes no no 1) Energy absorption capability under the conditions of the operating duty test acc. to IEC 60099-4 7 High-Voltage Metal Oxide Surge Arresters (72.5 to 1200 kV) Porcelain 3EP5 Applications 3EP2 3EP3 Medium- and high-voltage systems, outdoor installations Medium- and high-voltage systems, outdoor installations High-voltage systems, outdoor installations High-voltage systems, outdoor installations, HVDC, SC&SVC applications Nominal system voltage (max.) kV 110 345 500 765 Highest voltage for equipment (Um) kV 123 362 550 800 Maximum rated voltage kV 96 288 468 612 Maximum nominal discharge current kA 10 10 20 20 3 3 5 5 8 8 13 25 1100 1100 2000 7000 40 65 80 100 2.0 (SSL)1) 4.5 (SSL)1) 12.5 (SSL)1) 34 (SSL)1) Maximum line discharge class Maximum thermal energy absorption capability (per kV of Ur) Maximum long-duration current impulse, 2 ms Rated short circuit current Maximum permissible service load kJ/kV A kA kNm Housing material Porcelain Design principle Hollow insulator Pressure relief device 8 3EP4 yes Silicone 3EL5 3EL1 3EL2 3EQ1 3EQ4 3EQ3 3EQ5 Medium- and high-voltage systems, station and line surge arrester Medium- and high-voltage systems, station and line surge arrester Medium- and high-voltage systems, station and line surge arrester Medium- and high-voltage systems, outdoor installations High-voltage systems, outdoor installations High-voltage systems, outdoor installations, HVDC, SC&SVC applications Medium- and high-voltage systems, outdoor installations, HVDC applications 132 345 500 345 500 765 – 145 362 550 362 550 800 1200 126 288 468 288 468 612 850 10 10 20 10 20 20 20 2 2 4 3 5 5 5 4.4 5 10 8 18 27 66 550 750 1200 1100 3200 8500 11000 20 65 65 50 80 80 80 0.5 (SSL)1) 1.2 (SSL)1) 4.0 (SSL)1) 6.0 (SSL)1) 38 (SSL)1) 72 (SSL)1) 225 (SSL)1) Silicone Silicone directly molded onto MOV Hollow insulator, silicone directly molded onto FRP tube no yes 1) SSL = Specified short-term load 9 Metal Oxide Surge Arresters for GIS (72.5 to 800 kV) 3ES2-D/E single-phase Nominal system voltage (max.) kV Highest voltage for equipment (Um) kV Maximum rated voltage Maximum nominal discharge current Rated short circuit current Maximum permissible service load Housing material Pressure relief device 10 3ES5-F/G/L single-phase 3ES5-H single-phase 3ES9-J single-phase 150/220 60 150 220/345 500 765 170/245 72.5 170 245/362 550 800 kV 156/216 96 156 216/288 444 612 kA 20 10 20 20 20 20 4 3 4 4/5 5 5 10 8 10 10/13 13 18 1200 850 1200 1200/1600 1600 2100 50 50 50 65 65 65 Maximum line discharge class Maximum long-duration current impulse, 2 ms 3ES5-C three-phase High-voltage systems, protection of metal-enclosed gas-insulated switchgear and transformers Applications Maximum thermal energy absorption capability (per kV of Ur) 3ES4-K three-phase kJ/kV A kA kNm – Metal yes Siemens Facilities Monitoring Devices Siemens manufactures arrresters in Berlin, Germany and Wuxi, China. All arrester-related testing facilities as well as research and development, sales and order processing are located in Berlin. In close vicinity are some of the most powerful high- voltage and high-power test facilities, the “Siemens test laboratories“. Close collaboration of research, design and manufacturing ensures continuous improvement and perfect quality. Safe due to extensive tests One example of the extensive tests carried out with highly modern testing equipment is the measuring of residual voltage with a nominal discharge current of 10 kA, 8/20 µs on a 3EP2 arrester for a 245-kV system. Recording, signaling and monitoring devices supply the necessary information on the discharge process and the condition of the arresters. 11 Published by and copyright © 2011: Siemens AG Energy Sector Freyeslebenstrasse 1 91058 Erlangen, Germany Siemens AG Energy Sector Power Transmission Division High Voltage Products Nonnendammallee 104 13629 Berlin, Germany www.siemens.com/energy/arrester Please contact us at: Phone: +49 30 386 33 222 Fax: +49 30 386 26 721 E-mail: [email protected] Power Transmission Division Order No. E50001-G630-A113-X-4A00 | Printed in Germany Dispo 30002 | c4bs-No. 7457 TH 263-110207 | BR | 472162 | PA | 03111.5 All rights reserved. Trademarks mentioned in this document are the property of Siemens AG, its affiliates, or their respective owners. 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.