distribution transformers. Single-Phase Overhead GENERAL. Cooper Power Systems manufactures a complete line of single-phase overhead-type

Transcription

1 Distribution Transformers Single-Phase Overhead Electrical pparatus 0-0 GENERL ooper Power Systems manufactures a complete line of single-phase overhead-type distribution transformers. Single-phase transformers are available as conventional, protected, step-down, High IL and as autotransformers. These transformers are available in a variety of ratings and meet or exceed the requirements of applicable NSI and NEM standards. Units designed per Rural Utilities Service (RUS) standards are also available. onventional overhead transformers are manufactured in kv. The completely self protected (SP) units are rated 5-67 kv. SP transformers have direct connected primary arresters, secondary breakers, and internal primary voltage fuses. This eliminates the need for separately mounted protective devices and installation economy results. Single-phase step-down and autotransformers reduce single-phase distribution voltages to new distribution voltages. Step-down transformers are manufactured in kv with dual primary or secondary voltages thru 50 kv IL. utotransformers are manufactured in kv, depending on the ratio between the primary and secondary voltages, and are available with a variety of tap arrangements. Single-phase High IL transformers are manufactured in kv and have IL ratings from kv. Figure. Single-phase overhead conventional transformer. Figure 3. Single-phase overhead completely self protected transformer. Figure. Single-phase overhead step-down transformer. January 00 Supersedes 3/98 Printed in U.S..

2 Single-Phase Overhead IRDGURD HNDWHEEL HIGH-VOLTGE USHING RRESTER LIFTING LUGS SEONDRY REKER HNDLE LOW-VOLTGE USHING GROUND STRP OVERLOD SIGNL LIGHT ORE OILS REESSED OTTOM Figure 4. Single-phase overhead transformer.

3 STNDRD FETURES Meet or exceeds NSI and NEM standards EPRI recommended interlaced core-type design (5-50 kv) Tank coating exceeds NSI over with a minimum dielectric strength of 8 kv Tin-plated high- and low-voltage bushing terminals to accommodate aluminum or copper conductors Laser-engraved nameplate Wet process porcelain high-voltage bushings resistant to high-voltage corona Tank grounding provisions Electrical grade mineral oil Heavy-duty lifting lugs and hanger brackets per NSI requirements Visible cover ground on units with cover-mounted bushings Recessed tank bottom that offers protection when sliding over rough surfaces utomatic pressure relief device Polymer low-voltage bushings (5-50 kv) rrester mounting and grounding provisions Internal mark indicates the proper oil level Secondary leads are stamped to ensure proper identification orrosion-resistant cover band Quality System ISO 900 certified OPTIONL ESSORIES Taps either two.5 % above and below; four.5% below; NEM taps or special taps Multiple voltage primaries Externally-operable, tap changer switches for safe operation Externally-operable, multiple voltage switches for safe operation (except auto) High corrosion area protection with extra creep bushings, stainless steel hardware and tanks Handwheel and birdguards R-Temp fluid where less-flammable liquid is required Envirotemp FR3 fluid where less-flammable fluid is required and where superior environmental characteristics are desired over with a minimum dielectric strength of 5 kv over mounted high-voltage bushings for 75 kv IL primary Porcelain low-voltage bushings (RUS) Rural Utilities Service design S/E design Special designs to meet international specifications are also available Drain/sampling valve Pressure vacuum gauge (tank size limitations apply) Filter press connections ase bars for platform mounting Temperature gauge (tank size limitations apply) Liquid level gauge (tank size limitations apply) OPTIONL ESSORIES (STEP-DOWN) Dual primary or secondary voltages thru 50 kv IL Wye or delta connections OPTIONL ESSORIES (HIGH IL) Wye or delta connections PROTETION OPTIONS (Except HIGH IL) Secondary breaker with weak link for secondary fault and overload protection (5-67 kv) (except step-down) Primary weak link fuse urrent-limiting fuse for high interrupting ratings and limiting fault currents Low-voltage distribution class MOV arrester internally or externally mounted (except step-down) Magnex Interrupter (Primary reaker) with isolation link Magnex Interrupter (Primary reaker) with partial range currentlimiting fuse Lightning arresters for primary over-voltage protection: direct connected, normal or heavy duty, metal oxide varistor (MOV) either internal (VariSTR ), or external, VariSTR or VariGP, either polymer UltraSIL or porcelain housing Standard for extra large kv and High-IL: lugs and brackets per NSI requirements up to 4500#. Optional on kv and High-IL. 3

4 0-0 SINGLE-PHSE OVERHED ONVENTIONL kv: Primary Voltage: 400-9,90 V Secondary Voltage: V TLE Typical Dimensions and Weights 3 95 kv IL and all kv 75 kv IL pprox. kv 75 kv IL 95 kv IL 5 kv IL 50 kv IL 75 kv IL 95 kv IL Weight (Ibs.) Includes sidewall mount H.V. bushings. Includes radiators. 3 Weights, gallons of fluid and dimensions are for reference only, and not for construction. Please contact ooper Power Systems for exact dimensions. SINGLE-PHSE OVERHED OMPLETELY SELF PROTETED (SP) kv: 5-67 Primary Voltage: 400-9,90 V Secondary Voltage: V TLE Typical Dimensions and Weights 95 kv IL 75 kv IL pprox. kv 75 kv IL 95 kv IL 5 kv IL 50 kv IL 75 kv IL 95 kv IL Weight (Ibs.) Includes sidewall mount H.V. bushings. Weights, gallons of fluid and dimensions are for reference only, and not for construction. Please contact ooper Power Systems for exact dimensions. 4

5 0-0 SINGLE-PHSE OVERHED STEP-DOWN & UTO kv: (autotransformers available kv) Primary Voltage: ,000 V (60-50 kv IL) Secondary Voltage: 400-4,400 V (60-5 kv IL) STEP-DOWN UTO TLE 3 Typical Dimensions and Weights - Two Winding Step-Down, 3 pprox. kv Weight (Ibs.) Includes radiators. utotransformers are up to 40% smaller. 3 Weights, gallons of fluid and dimensions are for reference only, and not for construction. Please contact ooper Power Systems for exact dimensions. SINGLE-PHSE OVERHED HIGH IL kv: Primary Voltage:,000-46,000 V Secondary Voltage: V TLE 4 Typical Dimensions and Weights pprox. Weight (Ibs.) kv 00 kv IL 50 kv IL kv IL 00 kv IL 50 kv IL 00 kv IL 50 kv IL Includes radiators. Weights, gallons of fluid and dimensions are for reference only, and not for construction. Please contact ooper Power Systems for exact dimensions. 5

6 Single-Phase Overhead QULITY ONTROL Single-phase overhead-type transformers manufactured by ooper Power Systems provide outstanding performance. ll ooper transformers pass tests as prescribed by NSI, prior to shipment. ores and coils are designed for high reliability and low field failure rates. The domed cover design in conjunction with the formed cover band provides increased pressure withstand capability, eliminates bushing overhang and improves cover retention. The highvoltage bushing design improves gasket protection and seal. The low-voltage polymer bushing virtually eliminates ultraviolet deterioration with its captured gasket, compression-limiting design. These transformers are designed and manufactured to be corrosion-resistant. Special attention is given to all welded external parts, to avoid potential corrosion problems caused by moisture entrapment. The recessed bottom design, as well as the stainless steel cover band ends, provide corrosion protection in these areas, which are more susceptible to coating damage during handling. ll coating systems exceed NSI The Quality System at ooper Power Systems Transformer Products is ISO 900 certified. FLUID OPTIONS Transformers can be filled with standard electrical grade mineral insulating oil, R-Temp fluid, Envirotemp FR3 fluid or other dielectric coolants manufactured by ooper Power Systems. For fire-sensitive locations, the transformer can be filled with R-Temp fire-resistant natural hydrocarbon fluid or Envirotemp FR3 fluid, a fire resistant natural ester-based fluid. Envirotemp FR3 fluid offers the benefit of a seed oil-based dielectric coolant with food grade additives, in addition to increased fire safety over conventional mineral oil. heck with ooper Power Systems for the availability of other dielectric coolants in single-phase overhead transformers. 00 ooper Industries, Inc. Envirotemp, R-Temp, Magnex, VariSTR and VariGP are registered trademarks of ooper Industries, Inc. UltraSIL and FR3 are trademarks of ooper Industries, Inc. P.O. ox 640 Waukesha, WI Printed on Recycled Paper MI /0