Coupling Capacitors
Coupling Capacitors Introduction With over 40 years of successful field experience, Trench is a recognized world leader in the design and manufacture of specialty high voltage equipment. In addition to reactors, high voltage instrument transformers and bushings, Trench designs and manufactures a complete line of Power Line Carrier (PLC) equipment. This includes transmitter - receivers such as On Off Keyed Carrier sets for blocking type relaying and FSK Carrier sets for transfer trip or unblocking relaying as well as line traps, coupling capacitors, line tuners, hybrids and ancillary devices. PLC utilizes the high voltage power transmission line as a transmission medium for high frequency communications signals. An efficient coupling path must be provided between the PLC transceiver and the high voltage line. This is normally achieved by the proper combination of line traps, coupling capacitors and line tuners or coupling devices. In conjunction with the coupling capacitor, the line tuner or coupling device provides a low loss signal path for selected PLC frequencies while attenuating other PLC frequencies and noise. This brochure describes the features and characteristics of Trench Coupling Capacitors (CC's). Since Coupling Capacitors are related to Capacitor Voltage Transformers but without electromagnetic circuitry, please also refer to brochure E214.50 (Capacitor Voltage Transformers) in the Instrument Transformer section of the Trench catalogue. Product Range Trench offers several models of Coupling Capacitors for customer selection. The models vary by their nominal capacitance and cantilever strength for a selected voltage class. The capacitance value is important for proper coordination of power line carrier coupling components and is listed in the following table. Note that Trench can supply Coupling Capacitors with capacitance values which are either higher or lower than the values shown. Please contact Trench for additional details. The cantilever strength of a Coupling Capacitor is important when the Coupling Capacitor is utilized as the sole support of a Line Trap. Trench Coupling Capacitors have the following approximate allowable working cantilever strength: Type TECF/TECP or 10500 ft-lb Type TEICF or 20000 ft-lb Type TEHCF/TEHCP or 23000 ft-lb Coupling Capacitors can be supplied with a standard base box mounting or a flat base, as required by each specific customer specification. Features optimized insulation system with state-of-the-art processing techniques stability of capacitance over a long period of time oil expansion by stainless steel bellows with pressure relief by puncture pin puncture pin operation releases insulating fluid to run down the porcelain, resulting in an oil stain and clear visual indication of a problem extra high strength porcelains provide both superior seismic performance and the ability to mount large line traps directly on the CC with corresponding savings in installed cost maintenance free cast aluminum base box or flat plate mounting options routine impulse and partial discharge tests manufactured to ISO 9001 quality standards. 2
Electrical and Mechanical Data (1) Max. continuous Impulse withstand Type operating voltage 1.2/50µs phase to phase kv kv TECP 69 72.5 350 115 121 550 500 550 1800 TEICF 115 121 550 500 550 1880 735 765 2425 TEHCP 115 121 550 500 550 1800 735 765 2425 (1) Other rating available on request. (2) Units available with higher or lower capacitance values available on request (3) Heights shown are correct for units equipped with Trench low profile base box (standard). For units equipped with universal base box add 4.25 inches (108 mm) 3
Fig. 1 Left: basebox mounted coupling capacitor Right: flat base mounted coupling capacitor Power frequency Standard Standard Dimension Dimension Net weight withstand capacitance creepage h 1 h 2 approx. 1 min. (2) kv pf in/mm in/mm in/mm lb/kg 165 20,800 62.5/1590 51/1295 (3) 35.75/908 275/125 265 12,500 102.5/2600 65/1651 (3) 49.75/1264 350/159 320 10,400 130/3300 73.5/1867 (3) 58.5/1486 375/170 370 8,300 145/3680 82/2083 (3) 66.75/1695 400/181 525 6,200 205/5210 112/2845 (3) 96.75/2457 575/261 640 4,600 260/6000 129/3277 (3) 114/2896 600/272 785 4,100 290/7370 146/3708 (3) 130.75/3321 675/306 785 3,500 390/9900 184.75/4693 (3) 169.75/4305 825/374 900 2,800 435/11050 210/5334 (3) 194.75/4947 950/431 265 20000 111/2819 71.75/1822 52.5/1333 525/238 320 16500 133/3378 80.25/2038 61/1549 575/261 370 15000 161/4089 90.75/2305 71.5/1816 650/295 525 10000 222/5638 121.5/3086 102.5/2603 900/408 640 8250 266/6756 138.5/3518 119/3023 1050/476 785 7500 322/8178 159.5/4051 140.5/3569 1150/522 785 5500 399/10135 197/5004 178/4521 1425/646 900 5000 483/12267 228.25/5798 209.5/5321 1650/748 1200 4000 644/16356 297/7544 278/7061 2150/975 265 47,500 112/2850 71.5/1810 53/1346 650/295 320 38,100 139/3530 79.75/2026 61.5/1562 700/318 370 30,500 165/4190 88.25/2242 70/1778 825/374 525 22,800 224/5700 121.75/3092 103.5/2629 1200/544 640 19,000 278/7060 138.75/3524 120.5/3061 1300/590 785 15,200 330/8300 155.5/3950 137.25/3486 1525/692 785 12,700 417/10590 197.75/5023 179.25/4553 1900/862 900 10,100 495/12570 223/5664 204.5/5194 2200/998 1200 6,200 660/16760 290.5/7379 271.75/6902 2900/1315 4
Trench Facilities The Trench Group is your partner of choice for electrical power transmission and distribution solutions today; and for the development of your new technology solutions of tomorrow. Trench Austria GmbH Paschinger Strasse 49 Postfach 13 A-4060 Linz-Leonding Austria Phone: 43-732-6793-0 Fax: 43-732-671341 Trench Brasil Ltda Via Expressa de Contagem, 2685 Contagem, Minas Gerais CEP 32370-485 Brazil Phone: 55-31-3391-5959 Fax: 55-31-3391-1828 Trench China MWB (Shanghai) Co., Ltd. No. 3658, Jiancheng Road Minhang, Shanghai Peoples Republic of China 200245 Phone: 86-21-54720088 Fax: 86-21-54723118 Trench High Voltage Products Ltd., Shenyang No. 2 Zhengliang Er. Road Jing Shen Xi San Street Dao Yi Economic Development Zone Shenyang 110136 P.R. China Phone: 86-24-89722688 Fax: 86-24-89737200 Bushing Division 432 Monarch Avenue Ajax, Ontario Canada L1S 2G7 Phone: 905-426-2665 Fax: 905-426-2671 Coil Product Division 71 Maybrook Drive Canada M1V 4B6 Phone: 416-298-8108 Fax: 416-298-2209 Instrument Transformer Division 390 Midwest Road Canada M1P 3B5 Phone: 416-751-8570 Fax: 416-751-6952 Power Line Carrier Division 815 Middlefield Road, Unit 6A Canada M1V 2P9 Phone: 416-291-8544 Fax: 416-291-5581 Trench France S.A. 16, Rue du Général Cassagnou B.P. 70 F-68 302 St. Louis, Cedex France Phone: 33-3 89-70-2323 Fax: 33-3 89-67-2663 Trench Germany GmbH Nürnberger Strasse 199 D-96050 Bamberg Germany Phone: 49-951-1803-0 Fax: 49-951-1803-224 Trench Switzerland AG Lehenmattstrasse 353 CH-4028 Basel Switzerland Phone: 41-61-315-51-11 Fax: 41-61-315-59-00 Trench (UK) Limited South Drive Hebburn Tyne & Wear NE 31 1 UW Phone: 44-191-483-4711 Fax: 44-191-430-0633 www.trenchgroup.com E 235.11 Subject to change without notice (05.2006) Printed in Canada.