Outdoor live tank SF6 circuit breaker EDT with integrated current transformer up to 72.5 kv

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1 Outdoor live tank SF6 circuit breaker EDT with integrated current transformer up to 72.5 kv

2 SF6 circuit breaker EDT with integrated current transformer ABB is a world leader in live tank circuit breaker (LTB) technology with more than a century of experience in development, production, engineering and project handling. ABB offers a complete range of LTB from kv. ABB products are manufactured in factories which are continuously working on improvements to quality, health and safety, environmental concerns and social responsibility. EDT SK The EDT SK is a combined apparatus including an ED type SF6 live tank breaker, with a central compartment per pole, and an integrated current transformer. Rated voltages for this equipment are from kv and rated breaking current from ka. The circuit breakers are available for single or three pole operation. Each set of current transformers has two primary ratios and up to three secondary windings. Main features and advantages The EDT circuit breaker is based on the latest developments in arc research, integrating in a single apparatus, functions of interruption and measurement, and offers the following advantages: Restrike-free interruption of capacitive currents due to high inherent dielectric strength of SF6 gas and optimized contact movement. Low over-voltages when switching inductive currents due to optimum quenching at current zero. High dielectric strength even when SF6 gas is at atmospheric pressure due to wide contact gap. Low operating energy, reduced mechanical stress on breaker and low reaction forces on the foundation. High making capacity even in the case of parallel connected capacitor banks. High seismic capability due to optimized pole and structure design. Easy installation and commissioning. Each circuit breaker is pre-tested and shipped to site in the form of few easily inter-connected units. Change of primary relation in the high voltage terminals without need for accessories. Having SF6 rupture disks and optional composite insulators reduces the explosion risks. Properties Nominal voltage Rated current Rated breaking current Rated frequency Primary current Secondary current Protection Measurement Typical value 36 to 72.5 kv up to 1600 A ka 50 and 60 Hz 100/200 A to 800/1600 A 1 to 5 A VA 5P VA Cl 0.2s, 0.2, Outdoor live tank SF6 circuit breaker

3 Design The circuit breaker poles include the breaking unit, the current transformers, the ceramic or composite support insulator and the pole linkage housing. The three poles of the breaker are mounted on a common support frame with the operating mechanism arranged below the same frame. The three breaker poles have a common gas system. For operations down to 30º C, the system is filled with SF6 gas at a pressure of 0.7MPa (abs at a temperature of +20 ºC). For applications where temperatures are as low as 50º C the common gas system is filled with a mixture of SF6 gas and nitrogen gas. When the SF6 and nitrogen gas mixture is used the breaking capacity is normally reduced one IEC step i.e. from 31.5 to 25kA. The operating reliability and service life of an SF6 circuit breaker is dependent on the maintenance of SF6 gas pressure and neutralization of the effects of moisture and decomposed products in the gas. This is achieved by: Well proven double O-rings of nitrile rubber for sealing purposes. Each breaking unit is provided with a desiccant, which absorbs moisture and gaseous decomposed products. Interruption capability is a function of SF6 gas density. A density monitor consisting of a temperature-independent pressure switch is provided in the circuit breaker. Temperature-dependent pressure variations of SF6 gas are compensated by hermetically sealed reference gas volume. An alarm signal is triggered when pressure drops due to loss of gas. upper terminal ceramic or silicon rubber insulator contact current transformer Operating mechanism, type FSA The circuit breaker is operated by a motor charged spring operating mechanism, which is installed in a splash-proof aluminum painted cubicle. Protection class IP-55. One FSA is used for three-pole operation. Three FSA are used when single pole operation is required. Outdoor live tank SF6 circuit breaker 3

4 Options Mechanical options Insulators Support structure Mechanical lock with key Extra corrosion protection Image contact Four door FSA operating mechanism SF6 gas monitoring Outdoor manometer Analogic SF6 gas monitor Electrical customization Grounding pads High voltage connections Six to twelve auxiliary contacts Multi-pole terminal contact. Surveillance of coils Minimum voltage trip coil Zero voltage capacitor trip Special applications Single pole operating driver Master-Slave Switchsync TM Withdrawable EDT EDT compact available in brown ceramic (grey on special request) or silicone rubber, with standard 25 mm/kv or long 31 mm/kv creepage distance. Silicone rubber insulators are used for improved safety, overall weight and electrical isolation. can be specifically designed to meet on-site distance requirements. to avoid unintended or unauthorized operation system for long term protection against corrosion, consisting of stainless steel pipe, with optional protective coating, and an hotdip galvanized metal structure with protective painting. measure breaker timing parameters allowing condition-based approaches for maintenance. facilitates access to the mechanism. simplifies on side maintenance records and doubles security of SF6 monitoring. monitors the quantity of gas in the breaker. for connection to earth. for both aluminum and cooper terminals. allows various different possibilities for the wiring of signals. improves mechanical and electrical protection in demanding environments. improves reliability of the circuit breaker by constant checks of the coil conditions. a security system which acts in situations of loss of electrical supply. The minimum voltage trip coil will open the circuit breaker when the supply falls below a determined voltage. opens the circuit breaker when there is no electrical supply (zero voltage). allows both single phase and three phase operation. for special circuit breaker applications, such as shunt capacitor banks or reactors, where uncontrolled closing or opening operations may lead to severe voltage and current switching transients. integrates circuit breaker, current transformer, disconnecting and earthing switch functions in a very competitive space-cost solution. includes all the features of the Withdrawable EDT plus voltage transformer, surge arrester and bus bar functions, in the best spacecost solution. Transportation and erection The EDT SK circuit breaker is transported as a complete unit filled with SF6 gas to a slight atmospheric overpressure. As the circuit-breaker is assembled and routine tested in the factory, the erection work at site is minimal and can easily be done in a day. Filling of the SF6 gas on site to specified working pressure can be facilitated by using the following pressurizing equipment: A special control valve for connection of SF6 gas bottle, and a 20 m long hose with connector. Complementary control valve for connection to nitrogen gas bottle (for mixed gas filling). Quality, safety and sustainability To ensure consistent and high product quality all components are subjected to stringent quality tests prior to manufacturing. To guarantee trouble-free functioning, comprehensive electrical and mechanical routine tests are carried out on the poles and operating mechanism after the product is fully assembled. Switchgear factory of ABB on Cordoba is certified with ISO 9001, ISO 14000, EMAS and ISO OHSAS. 4 Outdoor live tank SF6 circuit breaker

5 Technical data Values complying with IEC (50 Hz) and ANSI C37 (60Hz) EDT SK Rated voltage IEC kv ANSI kv Power frequency withstand voltage - 1 min. dry IEC kv min. wet IEC kv min. dry ANSI kv s. wet ANSI kv Lightning impulse withstand voltage IEC kv Full wave 1.2/50 us ANSI kv Chopped wave 2 us ANSI kv Chopped wave 3 us ANSI kv Creepage distance to earth (1) (2) mm Creepage distance across break (1) (2) mm Rated normal current A Rated breaking current (3) a 50 Hz ka a 60 Hz ka First pole to clear factor Making current/peak (3) ka 62.5/ / /79.0 Duration of short circuit s Closing time ms 60 Opening time ms 35 Total break time ms 60 Dead time ms 300 Rated reclosing time, 60 Hz ANSI 20 Rated operating sequence IEC ANSI O-0.3s-CO-3min-CO ANSI CO-15s-CO Current transformer (4) Cover Type A Insulation Type B (SF6 gas) Cores by phase 1 3 Measure and/or protection Secondary relation 1 to 5 A Class precision Cl 0.2, 0.2S, 0.5 Protection 5P15 to 5P30 Power 10 to 30 VA Primary relation Double relation 1) Other values on request. 2) Tolerance according to IEC ) 100% SF6 gas. 4) Technical specification according to customer requirements. Data and illustration are not binding. We reserve the right to make changes in the course of technical development. Shipping data Type EDT SK 72.5 kv ceramic/composite insulator three pole operation include one operating mechanism EDT SK 52 kv ceramic/composite insulator three pole operation include one operating mechanism Number of cases Total volume (m 3 ) Total gross weight (kg) Total net weight (kg) / / / /578 Outdoor live tank SF6 circuit breaker 5

6 Selection table for current transformers The EDT SK circuit breaker integrates SF6 insulated current transformers with one, two or three cores. Current transformers are designed and selected ad-hoc to satisfy on-site requirements regarding primary and secondary currents, accuracy classes and power. Current transformers are designed and tested according to IEC prior to assembly to ensure the most reliable and accurate operation. Hz Primary current Secondary current 6 Outdoor live tank SF6 circuit breaker Accuracy classes and power (S1) Accuracy classes and power (S2) Accuracy classes and power (S3) Cl VA 5P20 10VA 5P20 10VA Cl 0.2S 5VA 5P20 10VA 5P20 10VA Cl VA 5P20 10VA 5P20 10VA Cl 0.2S 10VA Cl VA 5P20 10VA Cl 0.2S 15VA 5P20 15VA 5P20 15VA Cl VA 5P20 15VA 5P20 15VA Cl 0.2S 15VA 5P20 15VA 5P20 15VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl 0.2S 20VA 5P20 20VA 5P20 20VA Cl 0.2S 10VA Cl VA 5P20 25VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl VA 5P20 15VA 5P20 15VA Cl 0.2S 15VA 5P20 15VA 5P20 15VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl 0.2S 15VA 5P20 20VA 5P20 20VA Cl 0.2S 30VA 5P20 30VA 5P20 30VA Cl VA 5P30 25VA 5P30 25VA Cl VA Cl VA 10P10 30VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl VA Cl VA 10P10 30VA Cl VA Cl VA 10P10 30VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl 0.2S 15VA Cl VA 5P20 15VA Cl VA 5P20 10VA 5P20 10VA Cl VA 5P20 10VA 5P20 10VA Cl VA 5P20 30VA 5P20 30VA Cl VA 5P20 15VA 5P20 15VA Cl VA 5P20 30VA 5P20 30VA Cl 0.2S 15VA 5P20 15VA 5P20 15VA Cl VA 5P20 30VA 5P20 30VA Cl 0.2S 15VA 5P20 15VA 5P20 15VA Cl 0.2S 15VA Cl VA 5P20 30VA Cl 0.2S 15VA 5P20 15VA 5P20 30VA Cl VA 5P20 15VA 5P20 15VA Others configurations avaible under request.

7 Dimensions EDT SK kv, 3 pole operation D= Ø (220) Dimensions in mm. Other phase separation can be accommodated. Withdrawable option with earthing switch EDT SK kv 805 ( STROKE) Y ( Ø14(8x) (1. Y 179 A B 445 C VIEW Y A (7. A EARTHING SWITCH 2970 FSA OPERATING MECHANISM CONTROL BOX 650 ( Dimensions in mm. Other phase separation and/or overall height requirements can be accommodated Outdoor live tank SF6 circuit breaker 7

8 Contact us Asea Brown Boveri, S.A. Escritor Conde Zamora, s.n Cordoba, Spain Phone Fax: 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 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 illustrations contained therein. Any reproduction, disclosure to third parties or utilization of its contents in whole or in parts is forbidden without prior written consent of ABB. Copyright 2014 ABB All rights reserved 2GPC

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