Instrument Transformers & Condenser Bushing HV & EHV Instrument Transformer. Canada. EHV & UHV Products. plot in Nashik on the Mumbai Agra National Highway and is demarcated in four main divisions: HV & EHV SF6 Gas Switchgear.540 sq. Crompton Greaves already possesses the distinction of producing world-class. HV. With this acquisition. Crompton Greaves is well on its way to becoming a Global Leader in the field of Transmission & Distribution. USA. Indonesia. . CG House. OEMs and Power Utilities. CROMPTON GREAVES has manufacturing facilities on all five continents spanning . which was relocated from Kanjur Mumbai Works & extended to all range of MV. The integration process now underway will strengthen the technological capability of CROMPTON GREAVES and its subsidiaries and allow the CROMPTON GREAVES group to emerge as leader at the cutting edge of Transmission & Distribution business on a global scale. CROMPTON GREAVES acquired the entire Pauwels Group. it has become one of the top 10 transformer manufacturers in the world. engaged in manufacture of EHV Transformers. The acquisition has given CROMPTON GREAVES access to new technologies – 765kV transformers. In May 2005. Ganz Transelektro. Industry. Gas Insulated Switchgear. GIS upto 300kV. making it the first truly Indian multinational. Medium Voltage Vacuum Switchgear and Lightning Arresters. supporting our marketing & service personnel located at the factory.Instrument Transformers Business Edge Business Edge The Switchgear Works of Crompton Greaves is located on a 1. To further augment its position in the Transmission & Distribution sector.mtrs. Operations commenced in 1980 with the manufacture of Medium Voltage Switchgear. a leading transformer manufacturer in Europe. rotating machines and Ganz Transverticum.32. Belgium. the turnover of CROMPTON GREAVES has crossed the US$ 2 billion mark. With the latest acquisition. International business today accounts for over 50% of the sales. Hungary. Mumbai Global Leadership Today. involved in the project business & specializing in high-end engineering & substation capabilities. CROMPTON GREAVES has recently acquired two Hungarian companies. Our regional establishments throughout India have factory-trained personnel to provide prompt pre & after sales service. Ireland.India. quality products that are globally competitive. A specialised Business Unit spearheads the export thrust for in-house products as well as carefully out-sourced synergestic products for supply to Trade. ISO 14001 and ISO 18001 respectively. High quality CRGO grade silicon steel. All our Current Transformers (72. Gray porcelains or variant shed profiles can also be supplied on request. Primary terminals. The fully assembled CTs are dried and oil filled under vacuum in evacuated heating chambers. In our live tank type of current transformers. snow and ice and can sustain considerable temperature variations.3 shows a schematic diagram of the connections. rigid aluminium shell which is fully insulated from the top housing. Mu-metal cores of wound ring type are used. CTs are of live tank type with rated voltage of 72. 6 10 7 11 12 15 14 13 1 2 3 ALUMINIUM HOOD STAINLESS STEEL BELLOW CORE WITH SECONDARY WINDING PRIMARY TERMINAL ALUMINIUM HOUSING PORCELAIN INSULATOR CONDENSER BUSHING 8 9 OIL FILLING PLUG ALUMINIUM SHELL 10 MULTI TERMINAL MONOBLOCK 11 SECONDARY TERMINAL BOX 12 RATING & SCHEM. environment management system. uniform insulation around the electrodes and fine potential grading along the bushing. The paper insulation is dried under heat and vacuum and impregnated with oil to achieve excellent insulation as well as ageing properties. Type CT and Type IOSK.5 to 550 kV. Stainless steel bellow mounted at the top compensates for expansion / contraction of oil due to ambient temperature variations. The insulation structure is specially designed to have a uniform drop of electric field radially as well as longitudinally across the bushing. Fig. the primary winding consists of aluminium sections accommodated in the top housing. with ratio changeover arrangements are accessible on the sides. The insulated primary and secondary windings are assembled in the top housing. The secondary leads are taken to the base of the CT through an oil impregnated paper (OIP) insulated condenser bushing. The CTs can be equipped with single or multiple primary turns. Fig. An oil filling plug is provided at the top of the bellow. High quality insulating kraft paper is used for insulation. (245 kV TO 550 kV) FIG. The fully encapsulated CT is impervious to rain. Thus the CT is hermetically sealed. The top housing is made of corrosion resistant aluminium alloy. 1 1 8 2 3 4 P1 9 P2 5 Design Current Transformers (CTs) are used to transform high voltage line current to a low standard value.5 to 550 kV) adhere to the requirements of the International quality standards and our quality system. concentric and distributed uniformly around the insulated secondary winding in order to have optimum mechanical endurance against short circuit forces. PLATE 13 GLAND PLATE 14 ALUMINIUM BASE CONSTRUCTION Brown glazed porcelain Insulator with shed profile as per IEC 815 is used. Upto 6 cores of various accuracy classes. safety management system are certified to ISO 9001–2000. burdens and . The cores and secondary windings are enclosed in a well contoured. The primary winding is rigid.1 shows the basic construction of a CT. The porcelains are cemented to aluminium alloy flanges on both sides with portland cement for providing optimum mechanical strength.Current Transformers Introduction A large quantity of Crompton Greaves Current Transformers upto 550 kV have been put into service in various environments in over 60 countries since 1984 where they are operating satisfactorily. form fitted to the internal active body. This is achieved by specially contoured electrodes. The primary windings are terminated on the sides of the top housing with provisions for convenient primary ratio changeover. The bellow position viewed through 4 5 6 7 15 OIL SAMPLING POINT the window on the Hood indicates the operational status and the oil level in the CT. The secondary terminal box. For regular and periodic checks on the equipment. The CT base structure is made of Aluminium Alloy. as per IEC 44-1 . two additional lugs are provided on the top housing. AD = ARCING DISTANCE Maintenance L1 The product is self contained. Thermal Stability Test. L2 Transport All CTs are be transported in horizontal position only. To provide stability during lifting and for erecting up from prone position. 2 (245 kV TO 550 kV) Rated Normal Current can be accommodated in one CT to meet different metering and protection requirements. maintenance free and does not require spares. wet Lightning Impulse Test. partial discharge etc. Multiple Chopped wave Impulse test. please refer the instruction manual supplied with the CTs. The secondary winding is uniformly distributed over the circumference of the core. For further details please refer to the instruction manual. . P2 Tests And Performance The performance and reliability of these Current Transformers has been verified at renowned international testing laboratories like KEMA (Netherlands) and CPRI (India). oil sampling valve and earthing pads are provided on the base. MIN. Main lifting lugs and mounting holes are also provided on the base. A1 A2 FIG. This minimises the reactance of the winding and helps in obtaining accurate transformation ratio. The CTs are type tested for short circuit performance.1996.Current Transformers FIG. 3 P1 P2 E CX 1S1 1S2 2S1 2S2 3S1 3S2 4S1 4S2 5S1 5S2 CX – CAPACITANCE AND TANDELTA MEASURING TERMINAL. A3 MAX. F. TYPE DESIGNATION 1. please contact us. SHORT TIME THERMAL CURRENT / DURATION 15. . APPLICABLE STANDARD 2. P. CANTILEVER LOAD 16.5 UPTO 1000 IOSK 420/630/1425 362 / 420 630 1425 1050 IOSK 550/680/1550 550 680 1550 1175 IEC 44-1(1996). SEISMIC ACCELERATION 9. PRESSURE RELIEF DEVICE 24. ALTITUDE 3.4000 1 OR 5 63 / 1 Sec 40 / 3 Sec 157. TOTAL WEIGHT 21. QUANTITY OF OIL 22. SEISMIC ACCELERATION 4.Current Transformers SN. SWITCHING IMPULSE 6. RATED PRIMARY CURRENT 13. CREEPAGE : : : : : UNIT A m g mm/kV 31/35 31/35 IOSK 245/460/1050 IOSK 300/460/1050 IOSK 420/630/1425 IOSK 550/680/1550 UPTO 4000 (FOR k=1) UPTO 1500 0. MOUNTING DIMS 20. ONE MIN. ONE MIN. AMBIENT TEMPERATURE 8. HIGHEST SYSTEM VOLTAGE : : : kV kV kVp kVp Hz °C g m 245 460 1050 NA UNIT IOSK 245/460/1050 (245 kV TO 550 kV) IOSK 300/460/1050 300 460 1050 850 50/60 -25 TO 50 0.5 / 100 In accordance with IEC 44-1 10500 3155 4275 5250 1060 700 800 1450 375 13750 3800 5060 6300 1200 750 890 2400 700 50 / 1 sec. 125 7500 2325 3410 4225 855 650 750 950 320 3 3 50 . VOLTAGE ON SECONDARY . For other specifications. RATED THERMAL CURRENT 2. ARCING DISTANCE 18. DYNAMIC WITHSTAND CURRENT: : : : : : : : : : : : : 19.5 31 31 These parameters are typical values.3/0.2000 . DIMENSIONS L1 L2 A3 A1 A2 : : : : : : : : : : kV kV A A kA /s kA kg mm mm mm mm mm mm mm kg kg — — — 6125 2040 2960 3755 825 600 700 850 210 50 / 1 & 3 Sec. TYPE DESIGNATION 1. 125 12. TYPE OF SECONDARY TERMINAL : BLOCKS — CLIP ON STUD TYPE Optionals SN. OIL LEVEL INDICATION 23. TOTAL CREEPAGE DISTANCE 17. LIGHTNING IMPULSE 5. RATED FREQUENCY 7. PROVISION FOR COMPENSATION OF OIL VOLUME EXPANSION/ CONTRACTION BELLOW LEVEL INDICATOR PROVIDED AT THE TOP STAINLESS STEEL BELLOW PROVIDED AT THE TOP STAINLESS STEEL BELLOW PROVIDED AT THE TOP 25. RATED SECONDARY CURRENT : 14.PROTECTION 11.3 / 0.METERING . POWER FREQUENCY : VOLTAGE 4. ALTITUDE 10. IS 2705 (1992) 3. EMU Tank Chamber For Indicator Bellow Level Indicator Tank Cover NHF Terminal M. An oil level indicator is mounted on the side wall of the tank.Capacitive Voltage Transformer FIG. Supercalendered capacitor tissue paper and pure aluminium foils are used to make the capacitor elements. ISO 14001 and ISO 18001 respectively. The electrical connections between the capacitor elements are designed for a natural frequency much above 600 KHz in order to avoid interference with carrier communication. The capacitor elements are pressed and held in insulating supports to ensure a stable capacitance even for large temperature variations. safety management system are certified to ISO 9001–2000. .V.V. The insulators are cemented to aluminium alloy flanges for improved strength. 4 1 (72. 5 CAPACITOR UNIT Coupling Capacitor 6 19 7 8 18 17 16 12 15 14 13 10 11 9 The Coupling Capacitor (CC) acts as a voltage divider and converts the system voltage to a medium voltage. damping element and surge protection device. The CVT thus has very low PD levels even at low ambient temperatures. Oil volume changes due to temperature variations are compensated by a stainless steel bellow installed at the upper end of the CC. Our CVTs adhere to the requirements of the International quality standards and our quality and environment management system.5 kV TO 550 kV) More than 15000 Crompton Greaves Capacitive Voltage Transformers upto 550 kV have been put into service in various environments in over 60 countries all over the world since 1984 where they are operating satisfactorily. The processed capacitor stack is assembled inside a porcelain insulator with corrosion resistant aluminium alloy end fittings. The CC and the EMU are individually hermetically sealed to ensure accurate performance and high reliability. The bellow is pressurised by inert gas (from the top surface) to maintain a positive oil pressure even at lowest ambient temperatures. The unit is housed inside a steel tank which is filled with insulating oil leaving a largely dimensioned air cushion at the top in order to take care of changes in the oil volume due to fluctuations in the ambient temperature. Terminal Ø30×80 Hood Chamber 14 Porcelain Flange 15 Bellow 16 Porcelain Insulator 17 Oil Filling Plug (For EMU) 18 Lifting Lugs 19 Secondary Terminal Box 20 Surge Arrestor 21 Inductive Voltage Transf. The active part of the CC consists of a large number of oil impregnated paper (paper and film) capacitor elements connected in series. Each CVT consists of a coupling capacitor (CC) which acts as a voltage divider and an Electro Magnetic Unit (EMU) which transforms the medium voltage to standard low voltage. CAPACITOR VOLTAGE TRANSFORMER 1 2 3 4 5 6 7 8 9 10 11 Collapsible H. compensating reactor. 2 20 3 4 Design And Construction Figure 4 shows the schematic view as well as the construction of a single stack CVT. Brown glazed porcelain insulators with shed profile as per IEC 815 are used. The unit is completely filled with degassed insulated oil under vacuum. Depending on the system voltage the CC can be a single or a multi stack unit. Tap Terminal Oil Level Indicator on EMU Compensating Choke Earthing Pads (8mm THK) 12 13 Damping Device Oil Sampling Valve (for EMU) Electromagnetic Unit The Electromagnetic Unit (EMU) consists of a medium voltage transformer. (72.Earthing Switch H A ARCING DISTANCE Optionals / Accessories • • • Terminal Connector (Aluminium/Bimetallic. NEMA or as per customer specs) Three element Carrier Protection Device Level (comprising Drain Coil. surge Arrester & Earth Switch) Cable Glands H C1 C2 NHF L Link F F Tr D S ES 1a 1n 2a 2n f v g N Link Zd A A W W W BOTTOM VIEW W BOTTOM VIEW FIG. N .Damping Device V D S . maintenance free and requires no spares over its entire life span.Capacitive Voltage Transformer The CC unit is mounted on the EMU tank and the insulated earth terminal of the CC (marked as ‘NHF’ in Fig. The NHF terminal must always be connected to earth if the CVT is not connected to carrier equipment.HV Terminal C1 .Varistor .5 kV TO 550 kV) FIG. Capacitance C2 .HF Terminal L Tr F .4) is also accessible for connecting to power line carrier communication equipment.HRC Fuse Zd . The EMU is given adequate surface treatment for corrosion protection for life long service. Secondary leadouts. A surge arrester across this terminal and earth serves as the surge protection device. The EMU is calibrated and adjusted at factory for all burden and accuracy requirements.Pri.Drain Coil .Surge Arrester Maintenance The product is self contained. The secondary terminal box is provided on the EMU tank. 6 MAX. BELLOW POSITION INDICATOR OIL LEVEL INDICATOR ON EMU . No site adjustments or measurements are neccessary. NHF lead and earth leads are all terminated inside the secondary terminal box. We recommend regular and periodic checks as per pre-specified schedules (specified in the Instruction Manuals supplied with the CVTs).Neutral Terminal Of Intermediate Transformer ARCING DISTANCE ES .Sec. MIN.Compensating Choke .Intermediate Voltage Transformer . 5 A . Capacitance NHF. SWITCHING IMPULSE 6. IEC 60044 . CREEPAGE DISTANCE : UNIT : : kV – CVE 72. 120/√3. 1815 8800 3075 6000 3625 6000 4250 6000 6125 4400 200VA / CL 0.2 These parameters are typical values.5 1. IS 9348 (1998) 72. POWER FREQUENCY VOLTAGE : ON SECONDARY 11. AMBIENT TEMPERATURE 8. TOTAL HEIGHT (H) 19.5/325/50 145/650/50 145/650/50 170/750/50 245/1050/50 300/1050/50 420/1425/50 420/1425/50 550/1550/50 IEC 358 (1990).2 (CONT) / 1.Capacitive Voltage Transformer (72.5 kV TO 550 kV) SN. ONE MIN. TOTAL CREEPAGE DISTANCE 13. RATED VOLTAGE FACTOR : kVp : kVp : : : : Hz °C g – kV V mm pF – VA kg mm mm mm mm kg kg – m 10. . VOLTAGE FACTOR 3. For other specifications. 120 . TYPE DESIGNATION 1. QTY OF OIL 23. ALTITUDE : : : : : : : : : : STAINLESS STEEL BELLOW UPTO 1000 Optionals SN. HIGHEST SYSTEM VOLTAGE 2. ARCING DISTANCE 18. please contact us. TOTAL SIMULTANEOUS BURDEN/ACCURACY : 15. MAXIMUM DEPTH (A) 20. SECONDARY VOLTAGE 12. TYPE DESIGNATION 1. APPLICABLE STANDARDS 2. POWER FREQUENCY VOLTAGE : 4.3/0.2 100 V A /CL 0.5 140 325 123 230 550 145 275 650 NA 50/60 -25 TO 50 0. SEISMIC ACCELERATION 9. TOTAL SIMULTANEOUS BURDEN/ACCURACY : 100 VA /CL 0.5 (2004). RATED FREQUENCY 7.5 CVE 123 CVE 145 CVE 170 1. TOTAL WEIGHT 22. LIGHTNING IMPULSE 5. 35 100 VA / CL 0. 110. HIGHEST SYSTEM VOLTAGE : UNIT : : kV kV CVE CVE CVE CVE CVE CVE CVE CVE CVE 72. EQUIVALENT CAPACITANCE : : : 14. MOUNTING DIMENSIONS (W) 21. CANTILEVER LOAD 17. IS 3156 (1992).9 FOR 30 SEC 31.5 (30 SEC) 3 100. 100/√3.2 CVE 245 CVE 300 CVE 362 CVE 420 — 31 CVE 550 — 31 : mm/kV – 4. TOTAL THERMAL BURDEN 16. 110/√3 . OIL VOLUME COMPENSATION (CC UNIT) 24.5 500VA 125 820 1950 785 450 315 75 1215 2350 785 450 360 90 200 1215 2350 785 450 430 95 1415 2550 785 450 450 100 1930 3410 785 450 575 115 2180 3655 785 450 600 125 750VA 250 2630 4175 850 450 810 200 2830 4370 850 450 825 210 3810 5730 850 450 950 240 7500 4400 9050 3000 10500 4400 13750 3000 170 325 750 245 460 1050 300 460 1050 850 362 575 1300 950 420 630 1425 1050 550 680 1550 1175 3. ONE MIN. have been supplied all over the world since 1986 and their performance and reliability has proven to be one of the best. at the same time. Inter-layer insulation is provided by Oil Impregnated Paper (OIP). The VTs can be provided with several metering and protection windings and can be designed to provide any desired voltage output from the secondary winding. ISO 14001 and ISO 18001 respectively.G. The fully assembled VTs are dried and oil filled under vacuum in evacuated heating chambers. The high voltage lead is brought to the bottom tank (which houses the windings) through an OIP insulated condensor bushing in order to maintain the accessible bottom tank of the VT at ground potential. 21 1 HOOD 2 TOP HOUSING 3 BUSHING TUBE 4 CONDENSER BUSHING 5 STEEL HOUSING 6 SHIELD 7 PRIMARY WINDING 8 SECONDARY WINDING 9 C. 22 5 6 7 8 9 14 15 16 17 18 Construction The VT head is equipped with the primary terminal. The high Voltage (HV) winding is wound over the low voltage (LV) winding and assembled over a closed iron core maintained at ground potential. The head accomodates an oil communicating type stainless steel bellow to compensate for changes in oil volume due to changes in the ambient temperature. uniform insulation and fine condensor grading. Grey porcelains or variant shed profiles can also be supplied against specific customer requirement. Nearly 5000 Inductive Voltage Transformers. Fig. Brown glazed porcelain of shed profile as per IEC 815 is used. High quality kraft paper is used to wind the bushings using a Wide Band Bushing Winding machine. The paper insulation is dried under heat and vacuum and then impregnated with oil to achieve excellent insulation as well as ageing properties. CORE 10 METALLIC BELLOW 11 OIL INDICATOR 12 13 14 15 16 17 18 19 20 21 22 19 PRIMARY TERMINAL Ø30X80 PORCELAIN INSULATOR LIFTING LUG Ø35 SECONDARY TERMINAL BOX RATING/SCHEMATIC PLATE SECONDARY TERMINALS GLAND PLATE OIL SAMPLING VALVE OIL FILLING PLUG UPPER PORCELAIN FLANGE LOWER PORCELAIN FLANGE . (245 kV To 420 kV) FIG.O. All our Voltage Transformers (72.5 to 420 kV) adhere to the requirements of the quality standards and our quality system. 7 shows the basic construction of the Inductive Voltage Transformer.Inductive Voltage Transformer Introduction Crompton Greaves Ltd. The porcelains are cemented to aluminium alloy flanges on both sides with portland cement to provide optimum mechanical strength. The high voltage winding consists of a multi-layered coil of insulated copper wire. removes any chances of abnormal internal pressure variation. Secondary taps can be used to obtain multi-ratio secondary voltage output. 7 1 20 10 2 3 4 11 21 12 13 Design Voltage Transformers (VTs) are used to transform high system voltages (kV) to low measurable values (Volts). have manufactured and supplied thousands of quality electrical products for the past six decades which have excelled in various test and service environments around the world.R. environment management system. type IVT/VEOT. A window is provided at the top to indicate the bellow level and thus the oil level in the VT. safety management system are certified to ISO 900-2000. The bellow renders the VT truly hermetically sealed and. Uniform potential gradient is obtained along the bushing by means of contoured electrodes. The bottom tank is made of high quality sheet steel and shaped to accomodate to the active part of the VT. please refer the instruction manual. BELOW LEVEL INDICATOR MIN. The secondary leads are brought out through multi-terminal monoblocks into the secondary terminal box for easy access. primer coated and finally painted with high quality polyurethane or hot deep galvanised in order to ensure excellent finish and corrosion resistance. HV and LV windings and the secondary terminal leadouts. oil sampling valve and rating and schematic plate. Lifting lugs and mounting holes are also provided on the tank. H ARCING DISTANCE H1 Tests And Performance The performance and reliability of Crompton Greaves make Inductive Voltage Transformers has been verified by type testing at renowned laboratories like CPRI (India). The tank is equipped with secondary terminal box with cover.Inductive Voltage Transformer (245 kV To 420 kV) FIG. spray galvanised. W A 4-HOLES OF Ø30 FOR MOUNTING . maintenance free and doesnot require any spares throughout its service life. KEMA Netherland. 8 MAX.5 kV IVT which is transported vertically. earthing connection. All exposed ferrous parts are shot blasted. BOTTOM VIEW W Maintenance The product is self contained. For regular and periodic checks. The bottom tank accomodates the core. Transport All IVTs are transported in horizontal position except for 72. CANTILEVER LOAD 17. 1 MIN POWER FREQUENCY WITHSTAND VOLTAGE ON SECONDARY WINDINGS 11. AMBIENT TEMPERATURE 8. 120 . TOTAL THERMAL BURDEN 16.5 (30 SEC) 3 100. 110. SECONDARY VOLTAGE 12. PROVISION FOR COMPENSATION OF OIL VOLUME EXPANSION 24. IS 3156. TYPE DESIGNATION 1. TYPE DESIGNATION 1. RATED FREQUENCY 7. TOTAL CREEPAGE DISTANCE 13.2 VEOT 420 31 : mm/kV : - These parameters are typical values. VOLTAGE FACTOR 3. TOTAL WEIGHT 22. TOTAL SIMULTANEOUS BURDEN / ACCURACY : 15.5 1000 VA 250 4195 4195 1000 600 X 600 1200 350 STAINLESS STEEL BELLOW CLIP ON STUD TYPE 10500 3200 300 VA /CL 0. HIGHEST SYSTEM VOLTAGE 3.2/50 μs IMPULSE WITHSTAND VOLTAGE 5. ONE MIN POWER FREQUENCY WITHSTAND VOLTAGE 4. HIGHEST SYSTEM VOLTAGE 2. For other specifications. SEISMIC ACCELERATION 9. RATED VOLTAGE FACTOR 10. QTY OF INSULATING OIL 23. 1992 245 460 1050 300 460 1050 850 50/60 -25 TO 50 0. TOTAL SIMULTANEOUS BURDEN / ACCURACY : UNITS : : kV VEOT 245 31/35 VEOT 300 31 200 VA / CL 0. 1. please contact us.2 (CONT) / 1. MAXIMUM WIDTH (A) 20. TOTAL HEIGHT UPTO HV TERMINAL (H1) 19. SWITCHING IMPULSE 6. ARCING DISTANCE : : : : : : : : : : : : : : kV kV kVp Hz °C g kV V mm mm VA kG mm mm mm mm kG kG UNITS (245 kV To 420 kV) VEOT VEOT IEC 44-2 (1997). TYPE OF SECONDARY TERMINAL BLOCKS : : : : : : : : : : Optionals SN.3/0.5 1.Inductive Voltage Transformer SN. TOTAL HEIGHT (WITHOUT SUPPORT STRUCTURE) (H) 18. APPLICABLE STANDARD 2.100/√3.5 1000 VA 250 3910 3460 1000 700 X 700 850 125 7500 2325 500 VA/CL 0. CREEPAGE DISTANCE 4. .5 750 VA 500 5930 5450 850 650 X 650 1250 360 420 630 1425 1050 VEOC 14. MOUNTING DIMENSIONS (W) 21. 110/√ 3 . 120/√3 6125 2040 500 VA/CL 0. I Shatterproof Epoxy Resin Cast Oil End Insulator. The significant features of these Bushings are : I “O” Ring Sealing for Leakproofness. Oil Flooding under Vacuum : The Fully Assembled & Leaktested Bushing is then filled with High Dielectric Strength Oil under Vacuum at Room Temperature for predecided duration & fine vacuum level. This has resulted in achieving breakthrough quality at design. Recently the new SS series of bushings have been successfully developed by using the measure – analyze – improve – control methodology. For Bushings upto 1250 Amps Aluminium Cast Electrodes with external surface painted with PU Paint are used which forms an integral part of the assembly. Oil End Epoxy Insulator etc. At predecided locations by the winding program. Flat Palm type Copper Terminal Pad is provided on Oil End Side. After the drying cycle is concluded. Drying & Impregnation : The Condenser Cores are then completely dried and impregnated in Vacuum Drying Chambers in various stages such as Air Heating. I Partial Discharge Free Performances at Rated Voltage. component & process level. the oil impregnation is carried out at a predetermined rate of flow of Oil Inlet which is in relation with the Capillary Rise of the Paper Insulation. The Assembly is held together by a Pre Loaded Coil Spring Stack which ensures perfect sealing at highest operating temperatures and also supports the assembly against the Loads applied at HV Terminal. pressure and temperature. Self Earthing type Test Tap / Capacitance & Tan Delta Measurement Tap & Oil Filling. I Provision for Oil Sampling at Mounting Flange Level for Health Monitoring. Sampling Valves are provided at Mounting Flange Level. The Drying cycles are concluded based on Quality of Fine Vacuum measured on Pirani Gauges. The Entire Assembly is a Tie Rod Assembly with the “O” Rings used at all sealing locations. The winding machine has close looped controls to ensure consistency of winding parameters such as tension. The Primary Terminals are manufactured from Copper Alloys. since 1985. we have successfully manufactured & supplied more than 25000. During the winding process partial drying . Fine Vacuum. The level of Fine Vacuum is a critical parameter of Effectiveness of Drying.Condensor Bushing Introduction Our S1-division manufactures EHV instrument transformers & condenser bushing and is certified to ISO 9001 since 1993. Failsafe designs with large margins on power frequency withstand voltage have been established. An extra tapped hole is provided on the Mounting Flange for fixing the substation earth flat. Gravity Die Cast Aluminium Conservator & Mounting Flanges are used on the Bushing assembly upto 245 kV. I Large Size Oil Level Indicator with Float for Better Visibility. I Standard : IEC 60137 I Insulation : Oil Impregnated paper I Low Dielectric Losses I Six Sigma Quality Components & Processes for Enhanced Quality & Reliability SS Sigma Series of the Paper Insulation is achieved. precisely cut Aluminium Foils are inserted to achieve the uniform condenser grading. air to oil type condenser bushings upto 420kV. Primary Terminations : The Primary Terminations are of Draw Lead Type for current ratings upto 800 Amps & they are of Draw Rod Type for Current Ratings upto 1250 Amps with Cable Joint at MountingFlangeLevel. Rough Vacuum. Construction Condenser Core Winding : The High Quality Insulating Paper is wound on Aluminium Tube for Currents upto 1250 amps) / on Copper Rod for Current Ratings of 2000 Amps / 3150 Amps. For 2000 Amps & 3150 Amps current ratings. Assembly : The Impregnated Condenser Cores are then assembled with the assembly components such as Air End Porcelain Insulator. Condensor Bushing SS Sigma Series STEM TYPE ( 2000 3150 AMPS) D1 H4 DRAW ROD TYPE (1250 AMPS) DRAW LEAD TYPE (800 AMPS) MOUNTING FLANGE CONSERVATOR BOTTOM H3 OIL END TERMINAL H1 BCT D3 D4 D5 H2 H5 * Diagram not to scale D6 X N FLANGE DETAIL D2 PCD . 5 140kV /325kVp 1250 2000 SS-325-3150 3150 SS-650-800 800 SS-650-1250 145 SS-650-2000 275kV /650kVp 1250 2000 SS-750-800 800 Sigma Series Condenser Bushing (Air To Oil Type. Weight (kgs) SS-250-800 800 SS-250-1250 SS-250-2000 52 105kV /250 kVp 1250 2000 SS-250-3150 3150 SS-325-800 800 SS-325-1250 SS-325-2000 72. 2) All dimensions are in mm . 52kV – 420kV) SS-750-1250 170 SS-750-2000 325kV /750kVp 1250 2000 SS Sigma Series SS-1050-800 800 SS-1050-1250 245 SS-1050-2000 460kV /1050kVp 1250 2000 SS-1425-800 SS-1425-1250 420 630kV /1425kVp 800 1250 Notes: 1) Dimensions given for BCT = 300 .Condensor Bushing Type Reference D1 30 100/300/600 60 60 30 0/100/300/600 60 60 30 100/300/600 60 30 100/300/600 60 30 100/300/600 60 400 60 30 720 720 450 60 450 230 230 360 360 450 230 49 49 – 73 73 335 164 – 60 335 164 38 120 190 150 150 240 330 330 335 164 38 120 335 164 – 190 15X12 15X12 15X12 15X12 20X12 20X12 20X12 24X12 24X12 60 335 164 38 120 15X12 290 290 290 290 290 400 400 400 660 660 335 164 38 120 15X12 290 335 115 – 115 15X12 290 1120 1835 1815 1795 1985 1965 1945 335 115 – 115 15X12 290 1120 60 695 695 800 800 920 850 850 970 225 115 – 110 15X6 185 1110 695 225 115 38 110 15X6 185 1110 600 660 660 660 660 1280 1280 1280 1430 1430 1430 2815 1130 2145 2815 1130 2145 2815 1230 2145 4240 1640 3315 4240 1640 3315 335 115 – 115 15X12 290 950 675 460 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 335 115 – 115 15X12 290 950 675 460 125 60 225 115 – 110 15X6 185 905 650 460 125 32 – – 50 50 – – 50 50 170 50 50 170 70 70 190 280 280 225 115 38 110 15X6 185 905 560 460 125 32 40 50 70 70 60 70 80 80 135 145 160 150 160 180 420 420 450 975 975 D2 D3 D4 D5 D6XN PCD H1 H2 H3 H4 H5 Draw Lead Draw Rod Stem Stem Draw Lead Draw Rod Stem Stem Draw Lead Draw Rod Stem Draw Lead Draw Rod Stem Draw Lead Draw Rod Stem Draw Lead Draw Lead kV Class Insulation Level Rated Current Current Termination Types Available BCT Approx. TXU.Philippines. PEEGT . KHREC . CESC. CSEB. REL Indian RAILWAYS.Bangladesh. GETCO. TERNA .Iran.Ghana. PC3.Indonesia. BPDB . PTC4 . DESA. NTPC. MPPGCL. UPPCL. HREC. NHPC. VRA. HYUNDAI HEAVY IND. COELCE. PSEB. APTRANSCO.Brazil. CEB . AREVA. ETSA. ECG . EDESUR. ELETROSUL.Norway. India.Korea. KWPA. RGE . ENERGEX . MSETCL. Thailand.Spain.Chile.Nigeria. DTL. EPE . REB. ABB. TNB . KEPCO . HYOSUNG. EGAT . PEDEEE. ELECNOR. RRVPNL. AMPLA. NPC Transco . EDENOR.Our Major Customers Domestic Customers: POWERGRID. AGL. Bangladesh.Argentina. Australia. PC2. UPCL.Thailand. EMCO. Indonesia. MPPTCL. EFE .Kenya. PGCB. TRANSGRID. International Customers : ENDESA . NPPMB. ERGON. POWERCOR. LG. NEPA .Syria. EPE.Australia.Malaysia. ESKOM. J&K GPDD. TRAFO .Germany.Indonesia. IRCON. ASEB. INTEGRAL.Sri Lanka.Peru. TNEB. DVC. KPTCL. TRANSBA . JSEB. HYUNDAI CONST .South Africa. DMRC.Korea. All Industrial Customers. Singapore. Chilectra. HCMCPC. All Major EPC Contractors like L&T. PC1. SPPMB. CPPMB. UPPTCL. OPTCL. ENEL. JSL etc.Taiwan. ABB .Vietnam. KSEB WBSETCL.Argentina SIEMENS . HVPNL. ELECTROSUR . Our International Presence Canada Iceland USA Spain France Italy Greece Syria Jordan Egypt Kyrgyzstan Iraq Iran Dubai Oman Nepal Bangladesh South Korea Laos Taiwan Japan Panama Costa Rica Mauritania Ghana Ecuador Peru Colombia Suriname Brazil Uruguay Benin Sudan Srilanka Nigeria Ethiopia Kenya Tanzania Zambia Botswana South Africa Mozambique Zimbabwe Myanmar Vietnam Thailand Philippines Malaysia Indonesia Australia Chile Argentina New Zealand . KPLC .Brazil CONCO .South Africa. Turkey. COPEL. EMEL. HYUNDAI ENGG. AREVA . GSECL. PEA. SIEMENS. ZESA Zimbabwe. Turkey. PT PLN .Italy. TPC . SECHEEP. EDELNOR. SPOORNET . APGENCO. Calcutta . Dr. Mumbai . IT & Bushing Combine-110 (16/10/2K-local) / Sangam .India.700 071 Tel : (033) 22829681 Fax : (033) 22829942 West : Mumbai Kanjur (East) Mumbai .D. 25795139 Fax : (022) 25794882 South : Chennai 3. Nashik . New Delhi .No.600 034 Tel : (044) 28257375 Fax : (044) 28231973 Cat.cgglobal. MGR Salai. M. 11. Worli. Chowringhee Road. Nugambakkam. CG House. Annie Besant Road.422 010 . Tel : (+91) 253 2301241 Fax : (+91) 253 2382219 / 2381247 E-mail : vidyadhar.400 [email protected] Web : www. Ambad. East : Kolkata 50. Tolstoy Marg.110 001 Tel : (011) 23730445 Fax : (011) 23324360 Data subject to change Regd. Office : 6th Floor.Crompton Greaves Limited Inst Trf & Bushings Division (S1) A-3. India.com Regional Head Quarters: North : New Delhi Vandana. Chennai .C.400 042 Tel : (022) 25782451.I.