Disconnectors and earthing switches For HV applications

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1 Disconnectors and earthing switches For HV applications a company of Rauscher & Stoecklin SERW ZREW Tesar

2 SERW Your partner for reliable HV switching devices Today s HV power transmission must not only meet a high degree of reliability, the products must also be designed to be efficient and long-lasting. Thanks to many years of experience in the field of power products with a focus on HV switching devices, it is possible for us to serve our customers as a competent and reliable partner. All products are precisely tailored to the requirements of the customer with regard to various criteria. Originated from the Skoda factory in 1975 and headquartered in Pilsen, Czech Republic, SERW has developed into one of the leading switching device manufacturers in Europe. The name SERW is today a synonym for reliability and quality in the market. Modern production processes, lean manufacturing, highly qualified employees as well as an integrated management system are the guarantee for today s success. The right product for every application The product portfolio of HV switching devices includes disconnectors and earthing switches for a voltage range of 72,5 to 420kV. The reliable and high quality products are available in different designs: Horizontal Pantograph Vertical All disconnectors are equipped with a motor drive. Optional, an earthing switch can be added. Pantograph disconnectors installed in a 420kV substation 2

3 Quality has a name R&D as the key to success We focus on your wishes to find a partnership-based solution. Our quality At SERW it is our aim that we can offer our customers the most innovative and high-quality products. All our products meet the latest technology with the highest quality standards. The HV switching devices of SERW leave no wishes in terms of reliability and security. The SERW HV disconnectors installed worldwide operate perfectly even under the most severe environmental conditions, such as near the coast, areas with high temperature differences and high icing probability. Focus on R&D SERW has a high focus on R&D and deeply anchored this focus in the organization. Many years of experience and intensive cooperation with power companies and different industries have helped us to develop our disconnectors in a way to meet and exceed our customers requirements. Only in this way have we been able to become a market leader in Europe. Insulators The insulators used correspond to the valid standards. We use only insulators from the leading manufacturers in Europe. Contact system Stable opening and closing of the contact system thanks to technologically advanced design maintenance free. 3

4 Earthing switch The earthing switches can be optionally mounted on the single and the three-pole design. The installation of two earthing switches per disconnector can also be offered as an option. Drive To actuate the disconnector and earthing switches, motor drives from our own production are used. The drives are usually mounted on a special traverse table or directly on the support frame. The lever and pull rod mechanism transfers the movement from the drive to the rotary isolators. Final assembly Switches up to 123kV are fully assembled in the factory and are individually tested for functionality before delivery. Switches 245kV and up are delivered in components. Tests and certificates All disconnectors and earthing switches are tested according to IEC The production is certified in compliance with ISO 9001 and ISO

5 Technical parameters Rated voltage 72,5kV 123kV 145kV 245kV 420kV Rated current Rated short-circuit current Rated surge current 1-minute power frequency withstand voltage 50 Hz, - to earth 1-minute power frequency withstand voltage 50 Hz, - across the isolating distance up to 4000A up to 63kA (1s) up to 160kA 140kV 230kV 275kV 460kV 520kV 160kV 265kV 315kV 530kV 610kV Impulse withstand voltage 1,2/50µs - to earth 325kV 550kV 650kV 1050kV 1425kV Impulse withstand voltage 1,2/50µs - across the isolating distance 375kV 630kV 750kV 1200kV 1425 (+240) kv Overview of the technical parameters 123kV Horizontal disconnectors with earthing switch during climatic test 5

6 Our service offerings Tailored to your needs A one-stop shop - from new products to installation and after sales services. SERW offers its customers comprehensive services and is your reliable partner throughout the entire life cycle of HV switches. Starting from installation and commissioning all the way to spare parts and maintenance. Our service is geared towards our customers. We are glad to perform the service work directly at the substation. As an option, we also train customer staff so that the installation and revision work can be carried out independently. Our highly qualified staff in our factory have decades of experience in the field of service and are known for high quality work. Final adjustment during installation 6

7 SERW as a company of R&S An international oriented Group The communality of the companies of R&S is many years of experience and expertise in the production of power products with the pursuit of progress in common. The R&S Group, founded in 2012 is an international oriented Group with its headquarters in Sissach, Switzerland and offices worldwide. The success of the R&S is built upon: Longtime experience of the different companies in their particular core competencies Highly motivated and trained employees Products based on proven technologies that go hand in hand with innovative and efficient manufacturing processes The results are products with highest possible quality and reliability for our customers. Companies of R&S Rauscher & Stoecklin Distribution transformers, railway switches, high current connectors SERW HV and MV switching devices ZREW Transformers Power transformers Tesar Cast resin transformers, distribution transformers, instrument transformers SERW Czech Republic R&S Sales Office Germany R&S Headquarters Switzerland Rauscher & Stoecklin Switzerland ZREW Transformers Poland Tesar Poland Tesar Italy Tesar Dubai Tesar UAE Direct sales by R&S or local partner Our offices worldwide 7

8 Companies of R&S R&S International Holding Reuslistrasse Sissach Switzerland Rauscher & Stoecklin Reuslistrasse Sissach Switzerland SERW Tymákovská 42, Sedlec Starý Plzenec Czech Republic ZREW Transformers ul. Rokicińska Łódź Poland Tesar Loc. Chiaveretto Subbiano - Arezzo Italy info@tesar.eu Tesar Polska ul. Skarbowa Niepołomice Poland info@tesarpolska.pl SERW, spol. s r.o. Tymákovská 42, Sedlec CZ Starý Plzenec T F serw@serw.cz a company of Rauscher & Stoecklin SERW ZREW Tesar Version: