Gas-insulated Switchgear ENK
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Product Brochure Gas-insulated Switchgear ENK The Innovative System up to 72.5 kV Power and productivity for a better world1

From Tradition into the Future ABB - to the benefit for our customers ABB is a world leader in gas-insulated switchgear technology with more than 40 years of experience in development, production, engineering and project handling. ABB offers gas-insulated switchgear for voltage ratings from 52 up to 1100 kV. The gas-insulated switchgear of type ENK represents the ideal solution for a reliable and environmentally friendly energy supply up to a rated voltage of 72.5 kV, a rated normal current up to 2500 A and a rated short circuit current up to 40 kA. The innovative design requires only a...

Switchgear Concept ENK - the design for the future To enable a lean engineering, manufacturing and installation process ENK is composed only by a minimum number of highly integrated functional modules. A reduced order-to-delivery time, commissioning effort and time, low spare part handling and an environmentally friendly design is beneficially for our customers: ENK - the innovative and environ-mentally friendly solution to meet the requirements of the future. - Minimum content of SF6-gas (up to 50 % less than other comparable products) - Plug-in technology resulting in drastically reduced...

Functional Modules Circuit breaker The horizontal arranged circuit breaker is a highly standard-ized module. It fits for all layouts, for all feeder bays and for all couplers. All connectable modules are fixed with plug-in barrier insulators. Due to the arrangement of the interrupters in a triangle form the conductors are as short as possible. In addition, the innovative form of the circuit breaker enclosure reduces the SF6 content to a minimum. The circuit breaker is equipped with one interrupter unit per pole. This common ABB design is applied in several other high voltage applications,...

Local control cabinet All electrical components for control, signalization, interlocking etc. are located within the local control cabinet. In addition, as it is usual in medium voltage equipment, the local control cabinet contains the operating mechanisms for the discon-nector and earthing switches as well as the circuit breaker operating mechanism. Hence, these operating mechanisms are accessible from the front panel. Either the conventional or the digital control technology is completed by a modular digital monitoring system. This system operates as an add-on to the existing control...

Layouts and Bay Arrangements Combination of modules Because of the modular and flexible design with standardized modules double and single busbar arrangements can be realized in an optimum way. ENK switchgear is shipped as complete factory tested package unit, filled with SF6-gas at atmospheric pressure. Erection of ENK itself consists mainly of setting up, aligning and coupling the individual bays to form a complete in-line arrangement. It includes assembly of the busbar sections, connecting up the auxiliary supplies and terminating the bays to the grid either through cable end units or...

Technical Data Rated values according to IEC Operating voltage kV 72,5 Operating frequency Hz 50/60 Lightning impulse withstand voltage against earth kV 325 across isolating distance kV 375 Power frequency withstand voltage against earth kV 140 across isolating distance kV 160 Normal current A 1250-2500 Peak withstand current kA 80-104 Short circuit breaking current kA 31.5-40 Minimum insulating gas pressure at 20 °C kPa 420 Minimum quenching gas pressure at 20 °C kPa 420 Permissible ambient temperature °C -30/+40 Encapsulation three-phase Location of installation indoor Expected lifetime >...

Contact us ABB AG High Voltage Products Brown-Boveri-Strasse 30 63457 Hanau-Gro(3auheim, Germany Telefon: +49 (0) 621 381 3000 Telefax: +49 (0) 621 381 2645 E-Mail: powertech@de.abb.com www.abb.com/highvoltage Note: We reserve the right to make technical changes or modify the contents of this document without prior notice. With regard to purchase orders, the agreed particulars shall prevail. ABB AG does not accept any responsibility whatsoever for potential errors or possible lack of information in this document. We reserve all rights in this document and in the subject matter and...