66-220 kv 2000-4000 А Publication 11.2011
"IZOLYATOR" PLANT performs design, manufacturing, warranty and post-warranty service of high-voltage bushings for various applications. The enterprise is the main supplier of high-voltage bushings for power industry in Russia and CIS countries. Hundreds of thousands of bushings were manufactured and are in operation now. Production program: bushings from 35 to 1150 kv for power transformers and shunt reactors high current bushings from 20 to 35 kv for transformers-to-busbar connection bushings from 110 to 500 kv for cable connection of transformers bushings from 35 to 220 kv for high voltage circuit-breakers wall bushings from 66 to 220 kv 220 kv bushings for complete SF6 insulated switchgears The bushings of any climatic-dependent design version are available. All the bushings are interchangeable with manufactured previously in regard of overall dimensions and connecting dimensions. Quality management system according to requirements of international s t a d a r d EN ISO 9001:2008 is operating at the plant. All the bushings are certified for compliance with State Standard GOST 10693-81 and other regulatory documents of Russia's Gosstandard. The bushings also comply with Standard IEC 60137.
II I Design of the bushing with RIP - insulation Internal insulation is the main structural part of the bushing; it is the insulating body formed by winding dielectric paper divided by conductive grading layers on the central tube (figure 1). The grading layers serve for optimal distribution of electric field in radial and axial directions, providing the highest dielectric strength values of both internal and external insulation. RIP - insulation is manufactured by winding crepe paper produced by «Weidmann Systems International AG» (Switzerland) or «Karl Fislage GmbH & Co. KG»(Germany), then the paper is impregnated with epoxy compound under vacuum and subsequently solidified under pressure. After thermal treatment and varnishing of external surface, the insulating body forms a solid kernel, and a connecting sleeve is mounted on it under press fit. The I SHED PROFILE II TEST TAP Figure 1 Geometric dimensions may vary, providing required creepage distance. Design of 110kV bushing with condenser-type RIP-insulation. 3 HIGH VOLTAGE WALL BUSHINGS 1
joints between the sleeve and the body are additionally sealed with epoxy resin to ensure leak-tightness. RIP-insulation has practically no gas inclusions. The main advantages of RIP-insulation are high reliability and long service life performance due to its low dielectric losses, low level of partial discharges in the insulation, and high thermal stability. External silicone rubber insulation (figures 1, 2) is made of elastic material created on the basis of proprietary organic-silicon compositions of RTV-2 type by «Wacker Chemie GmbH», Germany. Polymerization takes place directly at the insulating I body, thus completely excluding usage of transformer oil. Besides, no spring tightening device is needed. The bushings equipped with such insulation have the following advantages: absolutely dry, explosion-proof design requiring no maintenance; high tracking resistance, hydrophobic behavior of external insulation preventing flash-over without cleaning its surface, even in case of simultaneous exposure to moisture and contamination; I TEST TAP Figure 2 220 kv bushing. 2
external insulation fins having constant or varying spread, according to individual customer's requirements; seismic load resistance; damage-proof external insulation made of organic-silicon composition, reducing risk of damage during transportation and mounting; minimum weight; environmental safety; stability of properties during the whole operation life. Test tap connected to the last grading layer of the insulating body serves for checking the internal insulation; the test tap shall be obligingly grounded when measurements are not performed (figures 1, 2). Testing and operation Every type of bushing passed acceptance tests for compliance with all requirements of State Standard GOST 10693-81 and IEC 60137 Standard. Every manufactured bushing is subjected to hand-over tests for the purpose of checking its compliance with the requirements in regard of the type and quality of manufacture, including test measurement of partial discharge level and tgδ of the insulation, according to the mentioned documents. Technical maintenance requires only periodic (once in 4 years) measurement of tgδ of the bushing insulation. Technical data Connection The terminal plate is shown on the figure 3. The main information for choosing the bushing is contained in its code designation (figure 4). Technical specifications, overall and connecting dimensions of the bushings are presented at figures 3, 5 and in table 1. Г Д К - Hermetic design version - Extended lower part (standard length by default)) - Internal RIP insulation Figure 3 Terminal plate. Л П - Wall bushing - External silicone rubber insulation... III-90-110/2000 Rated current, A Rated voltage, kv Limit angle of vertical orientation, angular degree External insulation category depending on ambient contamination, according to GOST 9920-89 and IEC 60137 Standard Figure 4 Key to bushing designation code. 3HIGH VOLTAGE WALL BUSHINGS
Table 1 Technical data. Bushing type Drawing No. Type of internal insulation Rated voltage, kv Phase to earth voltage, kv Rated current, A Test voltage, kv 1 minute, 50 Hz Lightning impulse 1.2/50 μs Creepage distance, mm Test cantilever load, N Weight, kg Connection, figure No. 72.5 kv bushings ГКЛПIV-90-73/4000 ИВУЕ.686351.251 RIP 73 4000 126 kv bushings ГКЛПII-90-126/2000 ИВУЕ.686352.234 RIP 126 73 2000 230 550 2500 4000 147 3 ИВУЕ.686352.234-03 RIP 126 73 2000 230 550 3150 4000 160 3 ГКЛПIV-90-126/2000 ИВУЕ.686352.234-04 RIP 126 73 2000 230 550 3900 4000 165 3 ИВУЕ.686352.234-01 RIP 126 73 2000 230 550 3150 4000 167 3 ИВУЕ.686352.234-02 RIP 126 73 2000 230 550 3150 4000 170 3 ГКЛПIV-90-126/2000 ИВУЕ.686352.234-05 RIP 126 73 2000 230 550 3900 4000 180 3 172 kv bushings ГКЛПII-90-172/4000 ИВУЕ.686352.252 RIP 172 4000 252 kv bushings ГГКЛПIII-90-252/2000 ИВУЕ.686353.235 RIP 252 153 2000 460 1050 6300 5000 370 3 TOP VIEW Enlarged ГКЛПIV-90-252/2000 ИВУЕ.686353.235-01 RIP 252 153 2000 460 1050 7900 5000 395 3 Figure 6 Nameplate. 4 Figure 5
Overall and connecting dimensions. Dimensions, mm (figure 5) Interchangeability Bushing type Drawing No. 72.5 kv bushings ГКЛПIV-90-73/4000 ИВУЕ.686351.251 126 bushings L L1 L2 L3 L4 D D1* D2* D3 d* S n holes ГКЛПII-90-126/2000 ИВУЕ.686352.234 2950 1655 485 125 945 225 420 360 292 24/4 ИВУЕ.686352.234-03 3150 1760 485 125 1045 225 420 360 292 24/4 ГКЛПIV-90-126/2000 ИВУЕ.686352.234-04 3300 1655 485 125 1295 225 420 360 292 24/4 ИВУЕ.686352.234-01 3350 1950 685 125 1045 225 420 360 292 24/4 The range of products being manufactured includes not only the bushings currently mounted on the newly made transformers, but also those designed instead of the bushings manufactured previously. In this case, adequacy of the submerged bushing parts and the length of the pulled-through tap, as well as fitting dimensions of the mounting flange, are observed; if necessary, this is co-ordinated with the transformer manufacturers. ИВУЕ.686352.234-02 3500 2150 835 125 1045 225 420 360 292 24/4 ГКЛПIV-90-126/2000 ИВУЕ.686352.234-05 3820 2180 650 125 1295 225 420 360 292 24/4 126 bushings ГКЛПII-90-172/4000 ИВУЕ.686352.252 252 kv bushings ГКЛПIII-90-252/2000 ИВУЕ.686353.235 5815 3245 870 2155 225 890 840 330/29222/12 35 ГКЛПIV-90-252/2000 ИВУЕ.686353.235-01 6315 3245 870 2655 225 890 840 330/29222/12 35 * Connecting dimensions of the mounting flange may be modified according to Customer's requirements. WEIGHT DRAWING NUMBER SERIAL NUMBER DATE OF MANUFACTURE BUSHING TYPE NUMBER OF TECHNICAL SPECIFICATIONS OR STATE STANDARD 5HIGH VOLTAGE WALL BUSHINGS
Massa Ltd. Company 77 Lenina st., Pavlovskaya Sloboda village, Istra district, Moscow region 143581, Russia Tel.: +7 (495) 727 3311 Fax: +7 (495) 727 3320 E-mail: aleksey.gavrilov@mosizolyator.ru andrey.shornikov@mosizolyator.ru www. mosizolyator.com «Izolyator» Plant reserves the right to make changes in the subsequent publications of the catalogue according to new developments, as well as Customer s remarks and requests.