Volt-Pac Variable Autotransformer Product Features Voltage Regulators Variable Transformers • 99% Efficiency. • Single and poly phase models. • + 1% Output accuracy. • Manual and motor driven models. • No distortion or harmonics. • Programmable digital control option. • Single & 3 phase, 120-480V models. • Open or enclosed construction. • 1.5 Through 500 KVA sizes. • 99% Efficiency. • Analog or digital control. • 2.5 to 300 Amp capacity. • Single or three line control. • 120, 240 & 480V models. • Insensitive to Load power factor. • Formerly manufactured by GE. Table of Contents PRODUCT OVERVIEW ................................................................................ 1 GENERAL PERFORMANCE INFORMATION ............................................... 2 MANUAL, SINGLE-PHASE UNITS ............................................................... 4 MANUAL, THREE-PHASE UNITS ................................................................ 5 MOTORIZED, SINGLE-PHASE UNITS ......................................................... 6 MOTORIZED, THREE-PHASE UNITS .......................................................... 7 TERMINAL ARRANGEMENTS, CONNECTIONS AND WIRING ..................... 8 TERMINAL COVER KITS / MOTOR OPERATING TIMES ............................ 9 AUTOMATIC VOLTAGE REGULATORS ......................................................... 10 CONTROLLER ............................................................................................. 12 DIMENSIONS .............................................................................................. 13 CROSS REFERENCE TO MOST POPULAR COMPETITORS PRODUCTS WARRANTY: All Weschler In- struments products are warranted against material defects and work- SR TACO SR UPERIO WESCHLE manship for a period of one (1) year 221-B 10C 9T92A1 501 21 9T92A9 from date of manufacture. 1010 116CU 9T92A9 OPTIONS AND FEATURES MAY 1020 216U 9T92A13 VARY BETWEEN MODELS, CON- 1510 126U 9T92A28 1520 226U 9T92A30 TACT FACTORY FOR SPECIFICS. 5010 1156DU 9T92A49 IN A CONSTANT EFFORT TO IM- 5020 1256DU 9T92A51 PROVE OUR PRODUCTS, SPECI- 6010 ---------- 9T92A50 FICATIONS MAY CHANGE FROM 6020 1296DU 9T92A52 ---------- 146U 9T92A38 THOSE PUBLISHED. ---------- 246U 9T92A40 Volt-Pac Variable Autotransformer PRODUCT OVERVIEW The Volt-Pac variable transformer pro- Many other types of voltage control devices cation information regarding waveform char- vides continuously adjustable voltage over (such as phase-control semiconductors and acteristics and Volt-Pac transformers, see a range of zero to either 100% or 117% of saturable reactors) introduce distortion of the "waveform distortion" discussion on the line voltage. Its operation is simple and the voltage waveform. For detailed appli- page 2. efficient, and is based on autotransformer action. Cut-a-way view of 60-frame Volt-Pac The Volt-Pac coils are precision wound 2 variable transformer. on a toroidally-shaped core. One face of 10 the winding is properly smoothed and gold APPLICATION plated to provide a low resistance and long Volt-Pacs are presently at work on wearing track for the carbon brush. This plat- many electronic and electrical 3 9 applications including: ing process has been developed to pro- 4 vide efficient mating of brush and brush track for improved reliability of operation under • Power supplies 5 severe operating conditions. Operating life • Laboratory instruments 1 has been substantially improved as a re- • Test equipment sult. The core consists of strip-wound sili- • Speed control devices con steel for low electrical losses. The coil • Computer peripheral equipment 6 is insulated from the core by means of a • Welding controls molded phenolic form. • High-voltage precipitators To aid in heat dissipation a thermal radia- 8 • Variable speed devices for large machinery tor is mounted to, but electrically insulated • Electroplating from the shaft. This thermal radiator also • High-voltage electronic tube circuits serves as a brush holder. 7 DESCRIPTION 1 - New unique plating process on brush 6 - Cast-aluminum base for maximum heat Manual and motor-operated Volt-Pac tracks results in long life operation. This dissipation provides easy surface or models are listed in this publication. Manual ultra reliable feature is now furnished back-of-panel mounting. units provide fingertip voltage control when on all models. 7 - Insulation between core-and-coil and the Volt-Pac is easily accessible; use the 2 - Output voltage selector. metallic base. 3 - Standard steel shaft is easy to replace 8 - Precision bank-wound coils. motor-operated type for remote and auto- or modify. 9 - Spring-loaded solid-carbon brush. matic control or for large power ratings in- 4 - Aluminum radiator dissipates heat, pro- 10- Dial plate fits on shaft and provides ref- convenient to operate by hand. Rounding tects brush track. erence for voltage selection. out the complete Volt-Pac line, automatic 5 - Self-lubricating nylon bearings for 11- Corrosion-resistant parts used throughout. Volt-Pac models can be furnished to pro- smooth, reliable rotation. vide closely regulated output voltages. Manual and motorized Volt-Pacs can be furnished in either uncased or cased con- MILLION OPERATION TEST PROVIDES struction. Cased 50, 60 and 75 frame single RELIABILITY and multi-coil units are supplied with termi- With a minimum of moving parts, Volt-Pac copper conductor to a prescribed depth, re- nals exposed. Terminial enclosure kits listed variable transformers are virtually mainte- sulting in a uniformly flat, polished area on on page 9 may be purchased separately. nance-free. At the point of critical contact, which the carbon brush travels. Cased 85 and 95 frame units are supplied where the carbon brush travels on the coil The polished surface is thoroughly fully enclosed in a NEMA 1 rated enclo- surface, extra reliability is built in to assure cleaned prior to plating to assure maximum sure. The general configuration of Volt-Pac long-life operation. "take" of the gold alloy plating process. Gold models will vary depending upon the num- Starting with precision wound coils alloy is used to provide a low resistance, ber of cores and how they are stacked to- (wound under constant tension) a smooth nonoxidizing surface which prevents over- gether to achieve different ratings. surface is provided for the brush track. Criti- heating and associated burnout problems. UL-recognized insulation systems have cal tolerances are maintained during this Over this durable, ultra-smooth surface, been used throughout. In addition, UL com- process, a 0.001 in. error results in a reject! rides a spring-loaded, grain-oriented solid ponent listings are applicable to many of On the track area, epoxy cement is added. carbon brush. The contact between surfaces The coil is then oven-cured. Results are, the models identified on the following is so precise that laboratory tests show over pages. each length of wire is immobilized, locked one-million operations result in brush wear firmly in position to provide rigid perma- of less than 0.01 in. NO WAVEFORM DISTORTION nence and electrical reliability. When you specify Volt-Pac variable trans- Volt-Pac variable transformers provide an Then the brush track is smoothed to a gem- formers, you're getting precision equipment output voltage waveform that is a precise like finish on a lapping machine. This lap- designed for maximum life with minimum reproduction of the applied input waveform. ping process exposes the surface of each maintenance. 1 Volt-Pac Variable Autotransformer General Performance Information OUTPUT VOLTAGE RANGE Maximum amperes capability is most sig- Most Weschler Instruments Volt-Pac vari- nificant when the load has constant imped- able transformers can be connected to ad- ance; that is, when the output current auto- just output voltage as a percent of input matically decreases in proportion to the voltage applied-- such as with resistive loads. voltage over a range of either 0 to 100% or 0 to 117%. Refer to page 8 for connection details. However, when using units connected for 0 to 117% range, rated amperes (as shown in the product listings on pages 4-7 must not be exceeded. INPUT VOLTAGE TAP Many 240 and 480 volt input units are equipped with a tap for use on 120 or 240 volt lines while maintaining rated output voltage, i.e., 0-280 or 0-560 volts. However, when operating Volt-Pac units on the lower CURVE 2. Maximum amperes must be de- input voltage tap, rated current must be re- creased linearly with output voltage until duced in accordance with Curve 1 below rated amperes is reached. when output voltage exceeds 140 percent of input voltage. OVERLOAD CAPACITY For example, model 9T92A40, having Volt-Pac transformers have the capac- rated current of 16 amps, must not draw ity to handle non-repetitive short-duration more than 11.5 amps (72 percent x rated CURVE 4. Chart used to determine regula- overload currents as shown in Curve 3. current) when operating at 200 volt output tion factor in percent. For example, any Volt-Pac unit can with 120 volt input. CALCULATING REGULATION safely withstand 250 percent rated cur- To determine the regulation of any Volt-Pac CURVE 1. Current must be derated as shown rent for five minutes, as long as this con- when operating 240-volt units on 120V tap or transformer application, follow this simple dition is not repetitive. 480V units on 240V tap. three-step approach: CURVE 3 - Short-duration overload. 1. DETERMINE REGULATION FACTOR IN PERCENT-- Establish, in percent, the posi- tion of the output voltage selector in relation to its full rotation. Start with this point on the bottom of the curve representing the Volt-Pac connection you are using. At the point of in- tersection, read directly left and identify the regulation factor in percent. Example: Volt-Pac transformer is set at the 80 percent output voltage selector position with 0-100% range connection. Read up from 80 percent until you intersect the solid col- ored curve. Read left to the regulation factor which is 69 percent. KVA RATINGS KVA is a common term of rating for trans- 2. DETERMINE REGULATION VOLTS formers with fixed outputs. However, on vari- Determine proper rated current for the Volt- able voltage devices such as the Volt-Pac, Pac from model number listings on pages 4 the KVA varies as the output voltage is - 7. From Table A and this current rating, de- RATED AND MAXIMUM AMPERES changed; consequently, no single KVA rat- termine “ regulation” volts. Rated amperes is the output current that ing is definitive. Therefore, Volt-Pac trans- Example: You are applying Model Num- can be drawn from the Volt-Pac transformer former listings are presented in terms of cur- ber 9T92A10. The product listing shows rated at any position of the output voltage selec- amperes to be 12.0. Matching 12.0 amps with rent and voltage rating separately. tor, with either line (0-100%), or over-volt- “regulation ” volts in Table A, you get 2.3 volts. age (0-117% output) connections. WAVE-FORM DISTORTION Note that rated current is maintained with Volt-Pac variable transformers, being un- TABLE A "REGULATION" minimum resistance between track and saturated magnetic components, do not in- brushes and is dependent on periodic move- VOLTS BY RATED AMPERES troduce wave-form distortion. With Volt-Pac ment of the brushes. Leaving the brushes in 120V, 1-phase 240V, 1-phase transformers, the output voltage waveform one spot for extended periods will gradually 240V, 3-phase 480V, 1 & 3 phase is a precise reproduction of the applied in- increase contact resistance and may result Rated "Regulation" Rated "Regulation" put wave-form. This is true for both single in eventual overheating and damage to the Amperes Volts Amperes Volts and three phase units. Volt-Pac unit. 20 .5 80 . 40 . 11. Maximum amperes is the output current REGULATION (60-HERTZ) 40 .5 60 . 55 . 9. which can be safely drawn only when the Volt-Pac transformers provide excellent 60 .5 50 . 75 . 5.2 output voltage selector is at the full-range load regulation, with very small changes in 18 0.0 25 . 85 . 8.2 position and connected for line voltage out- output voltage occurring from no load to full 13 2.0 20 . 15 4. 7. put. Maximum amperes must be decreased load. Curve 4 enables you to find the per- 15 5.020 .2 15 6. 10. proportionately as output voltage is de- cent regulation factor for any of the three 10 8.0 30 . 30 0. 12. creased until rated current is reached. As basic type of Volt-Pac transformer connec- 30 0.0 30 . 30 5. 16. shown in Curve 2, any value of current in the tions. This percent factor, times the appropri- 30 7.0 4. shaded area may be safely drawn. NOTE: ate "regulation volts” from Table A, at right, 58 0.0 6. maximum amperes must not be drawn on gives the output voltage drop for any Volt- over-voltage connections. 65 0.0 9. Pac transformer model number. 2 Volt-Pac Variable Autotransformer General Performance Information the advantage of providing output voltage POWER FACTOR TABLE A NOTES: which varies linearly in proportion to the Load power factor has very little effect on On model numbers having rated amps the operation of a Volt-Pac transformer in the angle of rotation of the output voltage selec- greater than shown on chart, convert to chart range from 0.5 lagging to 0.5 leading. Like tor. Because of the large number of incre- values as follows : any transformer, the Volt-Pac reflects the load ments of output voltage selection, the output 120 VOLT, 1-PHASE—divide rated amps power factor to the line with very little change. voltage is virtually stepless. by number of cores. Only for very light loads, possibly under 10%, 240 VOLT, 3-PHASE—divide rated amps HIGH EFFICIENCY will the lagging power factor of the Volt-Pac Volt-Pac variable transformers have low become significant. by 1/3 the number of cores. electrical losses under all load conditions. 240 VOLT, 1-PHASE—divide rated amps SERIES AND PARALLEL CONNECTIONS Efficiency is 98.5 percent when the output by number of cores. Single-phase Volt-Pac transformers are not voltage selector is at full rotation. This effi- 480 VOLT, 1-PHASE—divide rated amps suitable for series or parallel connection in ciency remains high, even at greatly reduced the field because of the problems associated by 1/2 number of cores. load voltage. The efficiency curve (CURVE with field-adaption of single-phase units for 480 VOLT, 3-PHASE—divide rated amps 6) is typical for all Volt-Pac transformer rat- common shaft operation. ( Common shaft op- by 1/3 number of cores. ings, including 240 and 480-volt ratings. eration is required to prevent unbalanced 3. MULTIPLY REGULATION VOLTS BY loads and circulating currents. )Even factory PERCENT FACTOR. The 2.3 volts in Step 2, models, with common shaft operations, and CURVE 6 Volt-Pac units. multiplied by the “ regulation ” factor of 69 parallel connected coils, are provided with Typical efficiency curve. percent from Step 1, indicates a 1.6 volt drop intercoil reactors to minimize circulating cur- rents. in output voltage when output current changes from zero to full load at the speci- OPTIONS fied 80% selector position. FUSES-You may wish to fuse the brush lead AMBIENT TEMPERATURE (lead No. 3) of your Volt-Pac transformer for the maximum current rating applicable to your Volt-Pac transformer models are designed 0 model. This is good practice and protects the for continuous operation in ambients of –20 C 0 Volt-Pac unit against unforeseen overloads. to 40 C, at full rated load. When operated 0 above 40 C, units must be derated in accor- TAPS-Fixed-voltage taps can be provided dance with Curve 5. For example, when oper- at specific voltage levels depending on frame ating model 9T92A5 in a 60 C ambient, rated size and rated voltage. Such taps may require derating of the variable power output of the amperes would be: 87% X 4.5 = 3.92. Maxi- Volt-Pac unit to stay within the total power mum amperes would be: 87% X 5.8 = 5.05. rating of the unit. SHAFT MODIFICATIONS-The shaft pro- vided with each model accommodates the Volt-Pac transformer's voltage selector knob when mounted on panels not exceeding the THREE-PHASE CONNECTIONS thickness shown in dimension data. Modifi- Volt-Pac transformers rated for three-phase cation to the shaft, either in length or end- circuits are suitable for connection to either diameter, is available for both manual and delta or wye connected incoming power motor-operated units. sources or loads. These three-phase mod- MECHANICAL STOPS (MANUAL UNITS els consist of multiples of two or three single- ONLY)-Mechanical stops are special addi- phase units electrically connected in wye or tional clamps which can be provided to con- open delta. Wye connected units have a fine the angle of rotation of the voltage se- neutral connection accessible. A common lector to a portion of the total travel. The shaft rotates the output voltage selector of additional mechanical stops establish a mini- all the component core and coils in unison. mum output voltage above zero, and a maxi- Wye connected Volt-Pac transformers can mum output voltage below rated. be used to feed 3-wire, 3-phase balanced CURVE 5 loads. However, the common connection (or POSITIONING POTENTIOMETER-A preci- 0 Chart for ambients above 40 C, Volt-Pac vari- "neutral") of the Volt-Pac unit must not be sion potentiometer can be mounted on an able transformers should be derated in ac- used. This also applies if the system input is extended shaft of the Volt-Pac unit and can cordance with this curve. 3-wire, 3-phase (delta) with midpoint con- be used to reflect a signal proportional to the FREQUENCY nection in one of the phases. angle of rotation of the output voltage selec- With a three phase, 4-wire system input, tor. Such a potentiometer is normally used in With the exceptions noted in the Model the system neutral should be solidly con- the bridge circuit of a controller. Number listings on pages 4-7, all Volt-Pac nected to the common or "neutral" point of variable transformers are designed for op- LIMIT SWITCHES-All Weschler motor-op- eration at 50/60 Hz. They may be operated the Volt-Pac unit. This will prevent neutral erated Volt-Pac transformers have a limit shift and possible damage or failure of the at higher frequencies, without derating, how- switch at each end of the winding to prevent ever regulation becomes poorer. Units listed unit. Full-range voltage control cannot be over-travel of the voltage selector. Manual obtained from a three-phase Volt-Pac unit for 240-volt operation may be applied on Volt-Pac units have mechanical stops to pro- 120-volt, 25-Hz. supplies at listed current consisting of three single-phase units con- vide the same function. All Volt-Pac transform- nected in closed delta. Outside the factory, it ratings using 240-volt line connections. ers can be provided with additional limit is not practical to convert multiple single- switches to actuate other control circuitry at LINEAR OUTPUT VOLTAGE phase models to balanced three-phase ap- predetermined positions (or specified lengths Compared with other adjustable voltage plications because of associated mechani- of travel) of the output voltage selector. control devices, Volt-Pac transformers have cal problems. 3 Volt-Pac Variable Autotransformer MANUAL, SINGLE-PHASE The manual Volt-Pac transformer is one of three types of Volt-Pac variable trans- formers offered by Weschler Instruments. It is a device to provide continuously ad- justable voltage to an electrical load from a fixed line voltage. It's operation is simple and is based on autotransformer action. For information about motor-operated Volt- Pac units, see pages 6-7. Line Voltage Line Voltage OUTLINE Approx. UNCASED CASED (0-100%) (0-100%) No. of MODELS MODELS DIMENSIONS Net Wt. Lb. or Connection Cores & Over Voltage Only Foot Notes Frame Uncased Cased (0-117%) Max. Amperes Size 1 Model No. Model No. Fig. No. See Fig. No. SeeUd ncased Case Connection (For Constant pages 13,14 pages 13-17 Rated Amperes Impedance Loads) 120 VOLT INPUT: OUTPUT 0-120 VOLT (LINE VOLTAGE CONNECTION) 0-140 VOLT (OVERVOLTAGE CONNECTION) 2.5 3.2 1-30 9T92A1 ----------------- 3, 9 1 1 ---------- 2 6.5 8.0 1-50 9T92A7 9T92A7G2 2, 3, 9, 10 3 3 8 1/2 7 1/2 10.0 11.5 1-60 9T92A9 9T92A9G2 9, 10 4 4 11 10 12.0 14.5 1-60 9T92A10 9T92A10G2 5, 6, 9, 10 4 4 10 11 15.0 19.0 1-75 9T92A27 9T92A27G2 2, 10 5 5 15 17 18.0 21.7 1-75 9T92A28 9T92A28G2 2, 10 5 5 15 17 30.0 34.0 1-85 9T92A37 9T92A37G2 2, 10 6 6 30 33 34.0 37.0 1-85 9T92A38 9T92A38G2 2, 10 6 6 30 33 50.0 55.0 1-95 9T92A49 9T92A49G4 ---------- 7 36A 58 73 60.0 60.0 1-95 9T92A50 9T92A50G4 ---------- 7 36A 60 75 68.0 74.0 2-85 9T92A41 9T92A41G2 2 8 8 67 73 100.0 110.0 2-95 9T92A53 9T92A53G4 ---------- 9 36B 140 202 120.0 120.0 2-95 9T92A54 9T92A54G4 ---------- 9 36B 145 218 150.0 165.0 3-95 9T92A55 9T92A55G4 ---------- 11 36C 200 265 200.0 220.0 4-95 9T92A56 9T92A56G4 ---------- 11 36C 265 335 250.0 275.0 5-95 9T92A57 9T92A57G4 9 11 36E 325 395 300.0 330.0 6-95 9T92A58 9T92A58G4 ---------- 11 36E 390 410 360.0 360.0 6-95 9T92A59 9T92A59G4 ---------- 11 36E 402 435 240 VOLT INPUT: OUTPUT 0-240 VOLT (LINE VOLTAGE CONNECTION) 0-280 VOLT (OVERVOLTAGE CONNECTION) OR 120-VOLT INPUT: OUTPUT 0-280 VOLT (Note 4) 4.0 5.0 1-60 9T92A13 9T92A13G2 9, 10 4 4 10 11 5.0 6.8 1-60 9T92A14 9T92A14G2 6, 9, 10 4 4 10 11 7.0 10.1 1-75 9T92A29 9T92A29G2 2, 10 5 5 15 17 8.5 11.0 1-75 9T92A30 9T92A30G2 2, 10 5 5 15 17 12.0 14.5 2-60 9T92A23 9T92A23G2 5, 6, 10 13 13 22 23 1/2 14.0 14.0 1-85 9T92A39 9T92A39G2 2, 10 6 6 30 33 16.0 16.0 1-85 9T92A40 9T92A40G2 2, 10 6 6 30 33 30.0 33.0 1-95 9T92A51 9T92A51G4 ---------- 7 36A 58 73 35.0 35.0 1-95 9T92A52 9T92A52G4 ---------- 7 36A 60 75 60.0 66.0 2-95 9T92A60 9T92A60G4 ---------- 9 36B 140 202 90.0 99.0 3-95 9T92A62 9T92A62G4 ---------- 11 36C 200 265 120.0 132.0 4-95 9T92A63 9T92A63G4 ---------- 11 36D 265 335 150.0 165.0 5-95 9T92A64 9T92A64G4 ---------- 11 36E 325 390 180.0 198.0 6-95 9T92A65 9T92A65G4 ---------- 11 36E 390 460 210.0 210.0 6-95 9T92A66 9T92A66G4 ---------- 11 36E 402 475 480 VOLT INPUT: OUTPUT 0-480 VOLT (LINE VOLTAGE CONNECTION) 0-560 VOLT (OVERVOLTAGE CONNECTION) OR 240-VOLT INPUT: OUTPUT 0-560 VOLT (Note 4) 4.0 5.0 2-60 9T92A17 9T92A17G2 2 13 13 22 23 1/2 5.0 6.8 2-60 9T92A18 9T92A18G2 6 13 13 22 23 1/2 7.0 10.1 2-75 9T92A31 9T92A31G2 2 14 14 32 35 8.5 11.0 2-75 9T92A32 9T92A32G2 2 14 14 32 35 14.0 14.0 2-85 9T92A42 9T92A42G2 2 8 8 67 73 16.0 16.0 2-85 9T92A43 9T92A43G2 2 8 8 67 73 30.0 33.0 2-95 9T92A67 9T92A67G4 ---------- 9 36B 140 202 35.0 35.0 2-95 9T92A68 9T92A68G4 ---------- 9 36B 145 218 60.0 66.0 4-95 9T92A69 9T92A69G4 ---------- 11 36D 265 335 70.0 70.0 4-95 9T92A70 9T92A70G4 ---------- 11 36D 278 340 90.0 99.0 6-95 9T92A71 9T92A71G4 ---------- 11 36E 390 460 105.0 105.0 6-95 9T92A72 9T92A72G4 ---------- 11 36E 413 475 1. When over voltage connection is used, rated current should not be exceeded. 6. For line-voltage connection only, no overvoltage connection provided. 2. When using extended tap connections, operation is for 60-hertz only. 7. Shipped connected for 0-100% of input voltage. 3. Output at overvoltage connection is 0-110% of input voltage. 8. Shipped connected for 0-117% of input voltage. 4. When operated with this input voltage, rated current must be reduced in accordance with 9. Component listed by UL, uncased units only. Add suffix AIM to model No. Curve 1, page 2, when output voltage exceeds 140% of input voltage. 10. Order 1 terminal enclosure kit per core to convert this model to 5. 60 hertz only. enclosed terminals. 4 Volt-Pac Variable Autotransformer MANUAL, THREE-PHASE Line Voltage Line Voltage UNCASED CASED OUTLINE Approx. (0-100%) (0-100%) MODELS MODELS DIMENSIONS Net Wt. Lb. No. of or Connection Cores & Over Voltage Only Foot Notes Frame Uncased Cased (0-117%) Max. Amperes Size Fig. No. Fig. No. 1 Connection (For Constant Model No. Model No. Ud ncased Case See pages See pages Rated Amperes Impedance Loads) 13,14,15 13-17 240 VOLT LINE TO LINE INPUT: OUTPUT 0-240VOLT (LINE VOLTAGE CONNECTION) 0-280 VOLT (OVERVOLTAGE CONNECTION) (WYE CONNECTION) 6.5 8.0 3-50 9T92A19 9T92A19G2 3, 5, 10 17 17 25 27 10.0 11.5 3-60 9T92A21 9T92A21G2 2, 10 13 13 33 35 12.0 14.5 3-60 9T92A22 9T92A22G2 5, 6, 10 13 13 33 35 15.0 19.0 3-75 9T92A33 9T92A33G2 2, 10 14 14 48 52 18.0 21.7 3-75 9T92A34 9T92A34G2 2, 10 14 14 48 52 30.0 34.0 3-85 9T92A44 9T92A44G2 2, 10 10 10 100 110 34.0 37.0 3-85 9T92A45 9T92A45G2 2, 10 10 10 100 110 50.0 55.0 3-95 9T92A74 9T92A74G4 2 11 36C 210 265 60.0 60.0 3-95 9T92A75 9T92A75G4 2 11 36C 210 265 68.0 74.0 6-85 9T92A48 9T92A48G4 2 12 12 190 210 100.0 110.0 6-95 9T92A78 9T92A78G4 ---------- 11 36E 390 460 120.0 120.0 6-95 9T92A79 9T92A79G4 ---------- 11 36E 413 475 480 VOLT LINE TO LINE INPUT: OUTPUT 0-480 VOLT (LINE VOLTAGE CONNECTION) 0-560 VOLT (OVERVOLTAGE CONNECTION) (WYE CONNECTION) OR 240-VOLT INPUT: OUTPUT 0-560 VOLTS (Note 4) 4.0 5.0 3-60 9T92A25 9T92A25G2 2, 10 13 13 33 35 5.0 6.8 3-60 9T92A26 9T92A26G2 5, 6, 10 13 13 33 35 7.0 10.1 3-75 9T92A35 9T92A35G2 2, 10 14 14 48 52 8.5 11.0 3-75 9T92A36 9T92A36G2 2, 10 14 14 48 52 14.0 14.0 3-85 9T92A46 9T92A46G2 2, 10 10 10 100 110 16.0 16.0 3-85 9T92A47 9T92A47G2 2, 10 10 10 100 110 30.0 33.0 3-95 9T92A76 9T92A76G4 2 11 36C 210 265 35.0 35.0 3-95 9T92A77 9T92A77G4 ---------- 11 36C 211 265 60.0 66.0 6-95 9T92A80 9T92A80G4 2 11 36E 390 460 70.0 70.0 6-95 9T92A81 9T92A81G4 ---------- 11 36E 413 475 240 VOLT LINE TO LINE INPUT: OUTPUT 0-240 VOLTS (LINE VOLTAGE CONNECTION) 0-280 VOLT (OVERVOLTAGE CONNECTION) (OPEN DELTA CONNECTION) 4.0 5.0 2-60 9T92A17 9T92A17G2 2, 10 13 13 22 23 1/2 5.0 6.8 2-60 9T92A18 9T92A18G2 6, 10 13 13 22 23 1/2 7.0 10.1 2-75 9T92A31 9T92A31G2 2, 10 14 14 32 35 8.5 11.0 2-75 9T92A32 9T92A32G2 2, 10 14 14 32 35 14.0 14.0 2-85 9T92A42 9T92A42G2 2, 10 8 8 67 73 16.0 16.0 2-85 9T92A43 9T92A43G2 2, 10 8 8 67 73 30.0 33.0 2-95 9T92A67 9T92A67G4 ---------- 9 36B 140 202 35.0 35.0 2-95 9T92A68 9T92A68G4 ---------- 9 36B 145 210 60.0 66.0 4-95 9T92A69 9T92A69G4 11 36D 265 335 ---------- 70.0 70.0 4-95 9T92A70 9T92A70G4 11 36D 278 340 ---------- 90.0 99.0 6-95 9T92A71 9T92A71G4 11 36E 390 460 ---------- 105.0 105.0 6-95 9T92A72 9T92A72G4 11 36E 413 475 1. When over voltage connection is used, rated current should not be exceeded. 6. For line-voltage connection only, no overvoltage connection provided. 2. When using extended tap connections, operation is for 60-hertz only. 7. Shipped connected for 0-100% of input voltage. 3. Output at overvoltage connection is 0-110% of input voltage. 8. Shipped connected for 0-117% of input voltage. 4. When operated with this input voltage, rated current must be reduced in accordance with 9. Component listed by UL, uncased units only. Add suffix AIM to model No. Curve 1, page 2, when output voltage exceeds 140% of input voltage. 10. Order 1 terminal enclosure kit per core to convert this model to 5. 60 hertz only. enclosed terminals. Terminal Enclosure Kits see page 9 UL LISTING All manual, single-phase, uncased, 30, 40, 50 and 60 frame sizes have component listing as noted. Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 5 Volt-Pac Variable Autotransformer MOTOR-OPERATED, SINGLE-PHASE Weschler Instruments motor-operated Volt- Typical methods for controlling Weschler In- (3) Process control instrumentation—for Pac units differ from manual types primarily in struments motor-operated Volt-Pacs include: closed-loop, precise control, more sophisti- the means used to rotate the shaft to vary out- (1) Manual raise-lower switch—can consist cated circuitry can be used to provide the put voltage. A self-synchronous motor is used of either momentary-contact push-button or raise-lower switching for the motor. to position the output voltage selector. The mo- lever-type toggle switch. If you require motor operating times other than tor is reversible by means of a SPDT switch ( (2) Relays and contactors—control the raise- the 26 seconds, you drop the -G51 or -G54 not supplied ) and operates on 120-volt, 50/ lower power to the motor as a result of low- suffix in the Volt-Pac model listing and replace it 60 hertz circuits. level signals from external circuitry. Example: with a suffix from the table on page 9. photoelectric cells or thermostat signals can provide the input. Line Voltage Line Voltage UNCASED CASED OUTLINE Approx. (0-100%) (0-100%) MODELS MODELS DEMENSIONS Net Wt. Lb. Connection No. of or Only Cores & Foot Over Voltage Model No. Model No. Uncased Cased Max. Amperes Frame Notes (0-117%) (See Pg. 9 for (See Pg. 9 for See Fig. See Fig. (For Constant Size 1 Connection Ud ncased Case Impedance Motor Operating Motor Operating No. Pages No. Pages Rated Amperes Times) Times) 15-16 17 5-1 Loads) 120 VOLT INPUT: OUTPUT 0-120 VOLT (LINE VOLTAGE CONNECTION) 0-140 VOLT (OVERVOLTAGE CONNECTION) 6.5 8.0 1-50 9T92C7G51 9T92C7G54 2, 3, 10 21 21 13 14 10.0 11.5 1-60 9T92C9G51 9T92C9G54 10 22 22 14 16 12.0 14.5 1-60 9T92C10G51 9T92C10G54 5, 6, 10 22 22 14 16 15.0 19.0 1-75 9T92C27G51 9T92C27G54 2, 10 23 33 21 30 18.0 21.7 1-75 9T92C28G51 9T92C28G54 2, 10 23 33 21 30 30.0 34.0 1-85 9T92D37G51 9T92D37G54 2 24 36F 49 87 34.0 37.0 1-85 9T92D38G51 9T92D38G54 2 24 36F 49 87 50.0 55.0 1-95 9T92D49G51 9T92D49G54 ---------- 25 36K 87 115 60.0 60.0 1-95 9T92D50G51 9T92D50G54 ---------- 25 36K 87 127 68.0 74.0 2-85 9T92D41G51 9T92D41G54 2 26 36G 85 143 100.0 110.0 2-95 9T92D53G51 9T92D53G54 ---------- 27 36L 150 225 120.0 120.0 2-95 9T92D54G51 9T92D54G54 ---------- 27 36L 150 225 150.0 165.0 3-95 9T92D55G51 9T92D55G54 ---------- 28 36L 240 315 200.0 220.0 4-95 9T92D56G51 9T92D56G54 ---------- 28 36M 300 405 250.0 275.0 5-95 9T92D57G51 9T92D57G54 ---------- 28 36M 360 465 300.0 330.0 6-95 9T92D58G51 9T92D58G54 ---------- 28 36M 420 525 360.0 360.0 6-95 9T92D59G51 9T92D59G54 ---------- 28 36M 420 525 240 VOLT INPUT: OUTPUT 0-240 VOLT (LINE VOLTAGE CONNECTION) 0-280 VOLT (OVERVOLTAGE CONNECTION) OR 120-VOLT INPUT: OUTPUT 0-280 VOLT (Note 4) 4.0 5.0 1-60 9T92C13G51 9T92C13G54 10 22 22 14 16 5.0 6.8 1-60 9T92C14G51 9T92C14G54 6, 10 22 22 14 16 7.0 10.1 1-75 9T92C29G51 9T92C29G54 10 23 23 21 30 8.5 11.0 1-75 9T92C30G51 9T92C30G54 2, 10 23 23 21 30 12.0 14.5 2-60 9T92C23G41 9T92C23G54 5, 6, 10 29 29 28 29 14.0 14.0 1-85 9T92D39G51 9T92D39G54 2 24 36F 49 87 16.0 16.0 1-85 9T92D40G51 9T92D40G54 2 24 36F 49 87 30.0 33.0 1-95 9T92D51G51 9T92D51G54 ---------- 25 36K 87 115 35.0 35.0 1-95 9T92D52G51 9T92D52G54 ---------- 25 36K 87 115 60.0 66.0 2-95 9T92D60G51 9T92D60G54 ---------- 27 36L 150 225 90.0 99.0 3-95 9T92D62G51 9T92D62G54 ---------- 28 36L 240 315 120.0 132.0 4-95 9T92D63G51 9T92D63G54 ---------- 28 36M 300 405 150.0 165.0 5-95 9T92D64G51 9T92D64G54 ---------- 28 36M 360 465 180.0 198.0 6-95 9T92D65G51 9T92D65G54 ---------- 28 36M 420 525 210.0 210.0 6-95 9T92D66G51 9T92D66G54 ---------- 28 36M 420 525 480 VOLT INPUT: OUTPUT 0-480 VOLT (LINE VOLTAGE CONNECTION) 0-560 VOLT (OVERVOLTAGE CONNECTION) OR 240-VOLT INPUT: OUTPUT 0-560 VOLT (Note 4) 4.0 5.0 2-60 9T92C17G51 9T92C17G54 10 29 29 28 29 5.0 6.8 2-60 9T92C18G51 9T92C18G54 6, 10 29 29 28 29 7.0 10.1 2-75 9T92C31G51 9T92C31G54 2, 10 30 30 38 50 8.5 11.0 2-75 9T92C32G51 9T92C32G54 2, 10 30 30 38 50 14.0 14.0 2-85 9T92D42G51 9T92D42G54 2 26 36G 85 132 16.0 16.0 2-85 9T92D43G51 9T92D43G54 2 26 36G 85 132 30.0 33.0 2-95 9T92D67G51 9T92D67G54 ---------- 27 36L 150 225 35.0 35.0 2-95 9T92D68G51 9T92D68G54 ---------- 27 36L 150 225 60.0 66.0 4-95 9T92D69G51 9T92D69G54 ---------- 28 36M 300 405 70.0 70.0 4-95 9T92D70G51 9T92D70G54 ---------- 28 36M 300 405 90.0 99.0 6-95 9T92D71G51 9T92D71G54 ---------- 28 36M 420 525 105.0 105.0 6-95 9T92D72G51 9T92D72G54 ---------- 28 36M 420 525 120.0 132.0 8-95 9T92D73G51 9T92D73G54 ---------- 28 36N 540 675 1. When over voltage connection is used, rated current should not be exceeded. 6. For line-voltage connection only, no overvoltage connection provided. 2. When using extended tap connections, operation is for 60-hertz only. 7. Shipped connected for 0-100% of input voltage. 3. Output at overvoltage connection is 0-110% of input voltage. 8. Shipped connected for 0-117% of input voltage. 4. When operated with this input voltage, rated current must be reduced in accordance with 9. Component listed by UL, uncased units only. Add suffix AIM to model No. Curve 1, page 2, when output voltage exceeds 140% of input voltage. 10. Order 1 terminal enclosure kit per core to convert this model to 5. 60 hertz only. enclosed terminals. 6 Volt-Pac Variable Autotransformer MOTOR-OPERATED, THREE-PHASE MOTOR OPERATING TIME Motor operating time refers to the number of If you require motor operating times other than seconds for the motor to traverse its full range the 26 seconds, you drop the -G51 or -G54 in one direction. In the motor-operated listing, suffix in the Volt-Pac model listing and replace it most Volt-Pac model numbers are standard with a suffix from the table on page 9. 26-second motor operating time. Line Voltage Line Voltage UNCASED CASED OUTLINE Approx. (0-100%) (0-100%) Connection No. of MODELS MODELS DEMENSIONS Net Wt. Lb. or Only Cores & Foot Over Voltage Max. Amperes Frame Notes Model No. Model No. Uncased Cased (0-117%) (For Constant Size 1 (See Pg. 9 for (See Pg. 9 for See Fig. See Fig. Connection Ud ncased Case Impedance Motor Operating Motor Operating No. Pages No. Pages Rated Amperes Loads) Times) Times) 15-17 15-17 240 VOLT INPUT: OUTPUT 0-240 VOLT (LINE VOLTAGE CONNECTION) 0-280VOLT (OVERVOLTAGE CONNECTION) (WYE CONNECTION) 6.5 8.0 3-50 9T92C19G51 9T92C19G54 3, 5, 10 35 35 30 32 10.0 11.5 3-60 9T92C21G51 9T92C21G54 2, 10 29 29 38 41 12.0 14.5 3-60 9T92C22G51 9T92C22G54 5, 6, 10 29 29 38 41 15.0 19.0 3-75 9T92C33G51 9T92C33G54 2, 10 30 30 55 70 18.0 21.7 3-75 9T92C34G51 9T92C34G54 2, 10 30 30 55 70 30.0 34.0 3-85 9T92D44G51 9T92D44G54 2 31 36H 115 172 34.0 37.0 3-85 9T92D45G51 9T92D45G54 2 31 36H 119 172 50.0 55.0 3-95 9T92D74G51 9T92D74G54 2 28 36L 240 315 60.0 60.0 3-95 9T92D75G51 9T92D75G54 2 28 36L 240 315 68.0 74.0 6-85 9T92D48G51 9T92D48G54 2 34 36J 225 300 100.0 110.0 6-95 9T92D78G51 9T92D78G54 2 28 36M 420 525 120.0 120.0 6-95 9T92D79G51 9T92D79G54 ---------- 28 36M 420 525 150.0 165.0 9-95 9T92D82G51 9T92D82G54 2 28 36N 600 735 180.0 180.0 9-95 9T92D83G51 9T92D83G54 ---------- 28 36N 600 735 200.0 200.0 12-95 9T92D400G61 9T92D400G64 7 ---------- 36P 810 985 200.0 200.0 12-95 9T92D400G71 9T92D400G74 8 ---------- 36P 810 985 250.0 250.0 15-95 9T92D401G61 9T92D401G64 7 ---------- 36P 1000 1180 250.0 250.0 15-95 9T92D401G71 9T92D401G74 8 ---------- 36P 1000 1180 300.0 300.0 18-95 9T92D402G61 9T92D402G64 7 ---------- 36P 1200 1400 300.0 300.0 18-95 9T92D402G71 9T92D402G74 8 ---------- 36P 1200 1400 480 VOLT INPUT: OUTPUT 0-480 VOLT (LINE VOLTAGE CONNECTION) 0-560 VOLT (OVERVOLTAGE CONNECTION) (WYE CONNECTION) OR 240 VOLT INPUT: OUTPUT 0-560 VOLT (Note 4) 4.0 5.0 3-60 9T92C25G51 9T92C25G54 2, 10 29 29 38 41 5.0 6.8 3-60 9T92C26G51 9T92C26G54 5, 6, 10 29 29 38 41 7.0 10.1 3-75 9T92C35G51 9T92C35G54 2, 10 30 30 55 78 8.5 11.0 3-75 9T92C36G51 9T92C36G54 2, 10 30 30 55 78 14.0 14.0 3-85 9T92D46G51 9T92D46G54 2 31 36H 115 172 16.0 16.0 3-85 9T92D47G51 9T92D47G54 2 31 36H 115 172 30.0 33.0 3-95 9T92D76G51 9T92D76G54 2 28 36L 240 315 35.0 35.0 3-95 9T92D77G51 9T92D77G54 2 28 36L 240 315 60.0 66.0 6-95 9T92D80G51 9T92D80G54 2 28 36M 420 525 70.0 70.0 6-95 9T92D81G51 9T92D81G54 2 28 36M 420 525 90.0 99.0 9-95 9T92D84G51 9T92D84G54 2 28 36N 600 735 105.0 105.0 9-95 9T92D85G51 9T92D85G54 2 28 36N 600 735 120.0 120.0 12-95 9T92C410G61 9T92C410G64 7 --------- 36P 810 985 120.0 120.0 12-95 9T92C410G71 9T92C410G74 8 --------- 36P 810 985 150.0 150.0 15-95 9T92C411G61 9T92C411G64 7 --------- 36P 1000 1180 150.0 150.0 15-95 9T92C411G71 9T92C411G74 8 --------- 36P 1000 1180 180.0 180.0 18-95 9T92C412G61 9T92C412G64 7 --------- 36P 1200 1400 180.0 180.0 18-95 9T92C412G71 9T92C412G74 8 --------- 36P 1200 1400 210.0 210.0 21-95 9T92C413G61 9T92C413G64 7 --------- 36P 1400 1600 210.0 210.0 21-95 9T92C413G71 9T92C413G74 8 --------- 36P 1400 1600 240.0 240.0 24-95 9T92C414G61 9T92C414G64 7 --------- 36P 1500 1700 240.0 240.0 24-95 9T92C414G71 9T92C414G74 8 --------- 36P 1500 1700 240 VOLT INPUT: OUTPUT 0-240 VOLT (LINE VOLTAGE CONNECTION) 0-280-VOLT (OVERVOLTAGE CONNECTION) (OPEN DELTA CONNECTION) 4.0 5.0 2-60 9T92C17G51 9T92C17G54 10 29 29 28 28 1/2 5.0 6.8 2-60 9T92C18G51 9T92C18G54 6, 10 29 29 28 28 1/2 7.0 10.1 2-75 9T92C31G51 9T92C31G54 2, 10 30 30 38 50 8.5 11.0 2-75 9T92C32G51 9T92C32G54 2, 10 30 30 38 50 14.0 14.0 2-85 9T92D42G51 9T92D42G54 2 26 36G 85 132 16.0 16.0 2-85 9T92D43G51 9T92D43G54 2 26 36G 85 132 30.0 33.0 2-95 9T92D67G51 9T92D67G54 ---------- 27 36L 150 225 35.0 35.0 2-95 9T92D68G51 9T92D68G54 ---------- 27 36L 150 225 60.0 66.0 4-95 9T92D69G51 9T92D69G54 ---------- 28 36M 300 405 70.0 70.0 4-95 9T92D70G51 9T92D70G54 ---------- 28 36M 300 405 90.0 99.0 6-95 9T92D71G51 9T92D71G54 ---------- 28 36M 420 525 105.0 105.0 6-95 9T92D72G51 9T92D72G54 ---------- 28 36M 420 525 120.0 132.0 8-95 9T92D73G51 9T92D73G54 ---------- 28 36N 540 675 1. When over voltage connection is used, rated current should not be exceeded. 6. For line-voltage connection only, no overvoltage connection provided. 2. When using extended tap connections, operation is for 60-hertz only. 7. Shipped connected for 0-100% of input voltage. 3. Output at overvoltage connection is 0-110% of input voltage. 8. Shipped connected for 0-117% of input voltage. 4. When operated with this input voltage, rated current must be reduced in accordance with 9. Component listed by UL, uncased units only. Add suffix AIM to model No. Curve 1, page 2, when output voltage exceeds 140% of input voltage. 10. Order 1 terminal enclosure kit per core to convert this model to 5. 60 hertz only. enclosed terminals. Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: Sales@weschler.com . www.weschler.com 7 Volt-Pac Variable Autotransformer TERMINAL ARRANGEMENTS, CONNECTIONS AND WIRING TERMINAL ARRANGEMENTS CONNECTIONS FOR COMMONLY USED RATINGS Weschler Instruments Volt-Pac trans- former terminal boards are constructed Terminals Used and imprinted to facilitate connection to Surface Mounting Back-of-panel line and load. Most terminal boards areTn erminal Diagrams Connectio (Clockwise Mounting Rotation) Knob on (Clockwise designed for ring or spade terminals and End Opposite Rotation) Knob on 1/4" female quick-connect terminals. The Base Base End table at right illustrates typical terminal SINGLE-PHASE, SINGLE-CORE, 120-VOLT INPUT, 0-120/132-VOLT OUTPUT, 30 FRAME connections for many common ratings. Specific terminal details are shown with Input 120V 1-2 the outline diagrams on pages 13-17. Output 0-120V 1-3 Input 120V 1-4 Output 0-132V 1-3 SINGLE-PHASE, SINGLE-CORE, 120-VOLT INPUT, 0-120/140-VOLT OUTPUT, (EXCEPT 30 FRAME) WIRING DIAGRAMS Below are wiring diagrams for two Input 120V 1-4 4-1 basic types of Volt-Pac variable Output 0-120V 1-3 4-3 transformer connections. Input 120V 1-2 4-5 Output 0-140V 1-3 4-3 SINGLE-PHASE, SINGLE-CORE, 120-VOLT OR 240-VOLT INPUT, 0-240/280-VOLT OUTPUT Input 120V 1-6 4-7 Output 0-280V 1-3 4-3 Input 240V 1-4 4-1 Output 0-240V 1-3 4-3 Input 240V 1-2 4-5 Output 0-280V 1-3 4-3 SINGLE-PHASE, TWO-CORE, 240- OR 480-VOLT INPUT, 0-480/560-VOLT OUTPUT Input 240V 6-6 7-7 Output 0-560V 3-3 3-3 Jumper 1-1 4-4 Input 480V 4-4 1-1 Output 0-480V 3-3 3-3 Jumper 1-1 4-4 Input 480V 2-2 5-5 Output 0-560V 3-3 3-3 Jumper 1-1 4-4 TRHEE-PHASE (WYE), THREE-CORE, 240-VOLT INPUT, 0-240/280-VOLT OUTPUT NOTES FOR CONNECTIONS NOTE 1. Input 240V 4-4-4 1-1-1 Connection diagrams for single-phase rat- Output 0-240V 3-3-3 3-3-3 ings using more than two cores, and for three- Jumper 1-1-1 4-4-4 phase (wye) ratings using more than three Input 240V 2-2-2 5-5-5 cores, may be obtained by contacting your Output 0-280V 3-3-3 3-3-3 Weschler Instrument sales representative. Jumper 1-1-1 4-4-4 THREE-PHASE (WYE), THREE-CORE, 240- OR 480-VOLT INPUT, 0-480/560-VOLT OUTPUT NOTE 2. Ratings which have no tap connection uti- Input 240V 6-6-6 7-7-7 lize a three-terminal arrangement NOT Output 0-560V 3-3-3 3-3-3 shown in the adjacent connection diagrams. Jumper 1-1-1 4-4-4 Input 480V 4-4-4 1-1-1 NOTE 3. Output 0-480V 3-3-3 3-3-3 Three-phase unit is shipped with knob on Jumper 1-1-1 4-4-4 the end of unit opposite the base and with Input 480V 2-2-2 5-5-5 jumpers connecting terminals 1-1-1, (clock- Output 0-560V 3-3-3 3-3-3 Jumper 1-1-1 4-4-4 wise rotation will raise voltage). If knob is moved to the other end, remove jumpers THREE-PHASE (OPEN DELTA), TWO-CORE, 120- OR 240-VOLT INPUT, 0-120/140-VOLT OUTPUT AND 240-VOLT INPUT, 0-240/.280 VOLT OUTPUT from 1-1-1, and connect terminals 4-4-4 (this will maintain clockwise rotation to raise volt- Input 120V 4-1-4 1-4-1 age). Output 0-120V 3-1-3 3-4-3 Jumper 1-1 4-4 Input 120V 2-1-2 5-4-5 Output 0-140V 3-1-3 3-4-3 OPTIONS AND FEATURES MAY VARY BE- Jumper 1-1 4-4 TWEEN MODELS, CONTACT FACTORY FOR SPECIFICS. IN A CONSTANT EFFORT TO IM- Input 240V 4-1-4 1-4-1 Output 0-240V 3-1-3 3-4-3 PROVE OUR PRODUCTS, SPECIFICATIONS Jumper 1-1 4-4 MAY CHANGE FROM THOSE PUBLISHED. Input 240V 2-1-2 5-4-5 Output 0-280V 3-1-3 3-4-3 Jumper 1-1 4-4 8 Volt-Pac Variable Autotransformer TERMINAL ENCLOSURE KIT TERMINAL ENCLOSURE KITS When Volt-Pac models with enclosed ter- tables on pages 4-7. Always order a quan- F o r minals are required, modification kits can tity of kits corresponding to the number F ra me Ord e r Mo d e l N u mb e r be purchased economically to convert ex- of cores. For example, when an enclosed S iz e posed-terminal models to enclosed ones. version of Volt-Pac Model 9T92A41G2 is 30 no kits available --------------- A different terminal kit is available for desired, order one (1) Volt-Pac Model No. each Volt-Pac frame size. The frame size 9T92A41G2 and two (2) kits, Model No. 50 9T18Y903 Kit only and number of cores for each Volt-Pac 9T18Y903G4. See dimensions below. 60 9T18Y903G2 Kit only unit is listed in the third column of the 75 9T18Y903G3 Kit only 85 9T18Y903G4 Kit only DIMENSIONS - CASED MODELS with TERMINAL ENCLOSURE KIT Note: Refer to pages 13-15 for detailed dimensions of cased models with exposed terminals. When proper Fig. No. from pages 13-15 has been located, the diagrams and table below will provide overall dimensions for cased units with enclosed terminals. Frame TOP VIEW Fig. No. Dimensions in Inches Size & From Pgs. No. of 13 -15 1 Cores AA 3 50-1 ---------- 6 5/8 4 60-1 ---------- 6 5/8 5 75-1 ---------- 8 6 85-1 ---------- 12 8 85-2 12 3/8 ---------- TERNINAL 10 85-3 12 1/4 ---------- 12 85-6 11 7/8 ---------- ENCLOSURE KIT 13 60-2 7 1/4 ---------- 13 60-3 7 1/4 ---------- 14 75-2 8 5/8 ---------- 14 75-3 8 5/8 ---------- CONTROL 17 50-2 7 1/4 ---------- KNOB 17 50-3 7 1/4 ---------- MOTOR OPERATING TIME Motor operating time refers to the number of seconds for the motor to traverse its full range in one direction. In the motor operated listing, most Volt-Pac model numbers are for standard 26.2 second motor operating time. If you require motor operat- ing time other than the 26.2, you must drop the G51 or G54 suffix in the Volt-Pac model listing and replace it with a suffix from the table below. SUFFIX TABLE T. ime of Operation (Sec.)A) dd Suffix NoT. ime of Operation (Sec. Add Suffix No 6z 0 hertz5d 0 hertUd ncaseCz ase 6z 0 hert5d 0 hertUd ncase Case For All 30, 40, 50, 60 and 75 Frame Sizes* For All 85 and 95 Frame Sizes 43 .4 51 . G4 2 G7 2 34 . 41 . G4 2 G2 17 3.1 11 5. G4 4 G7 4 84 . 11 0. G4 3 G3 24 6.2 31 1. G4 5 G2 5 18 8. 21 1. G4 4 G4 56 4.6 61 5. G4 6 G2 6 24 6. 31 1. G4 5 G5 55 4.6 61 5. G4 6 G6 Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 9 Volt-Pac Automatic Voltage Regulator APPLICATIONS Broadcast: Transmitters, Receivers, Studios, and Mobile production units Almost every aspect of our lives is affected Industrial: Large Motor, Plating Systems, Resistance Heating, when electric power Machine Tool, Magnetic Solenoids and Clutches, Welders, Distribution Equipment, Test Equipment becomes unstable. Power Supplies Dependence on quality power increases while Marine: Private and Commercial Shipboard and Shore Power Conditioning power problems become more Commercial: Lighting, Elevator Controls, Chillers, UPS Nuisance predominate. Trip Prevention, High Rise Buildings Generation capacity Medical: X-Ray, MRI, CAT Scan Equipment and the distribution Electronic: Radar, Computers, Telecommunications system have not kept pace with increased FEATURES demand for electricity. Excellent Output Voltage Accuracy ±1% Low Impedance Design Competition forces 99% Efficiency Typical High Overload Capacity equipment manufacturers to pushNe o Waveform Distortion or Harmonics Low Maintenanc component limits, 0 0 N0 ot Sensitive To Load Power Factor -2 to +40 C Ambient Operating Temperature Range making them more Fast Voltage Correction Loss of Regulation Will Not Interrupt Power to Load sensitive to voltage Adjustable Output Voltage Insensitive to Frequency Changes fluctuations. Many electrical loads now Manual Raise-Lower Switch (47-63 HZ Operating Range) create voltage Wide and Narrow Input Voltage Range Selectable imbalances due to non Cabinet or Rack Mounted Single and Three-Phase Models sinusoidal current Indoor Ventilated Drip-Proof Enclosure 1.5 to 500 KVA Rated Models Available draw. Power company corrections for low Output Voltmeter Included Fused Control Circuit voltage in one area One-Year Warranty result in high voltage OPTIONS in another. Poor power quality is a silent killer Ds igital Control Ammeter causing unexplained Shifted Input Ranges Input Voltage Range Alarm Contacts equipment glitches and Frequency Meter premature failures, increasing downtime and cost. Surveys Dimensions (Inches) show voltage sags Catalog Number represent 87% of short A B C term power 94 T92C0101, 102,103,104,109,11026 0 3/18 9 11/1 9 5/ disturbances. VoltPac Voltage Regulators 98 T92D0105, 111 22 0 7/ 28 13 1/ solve voltage 92 T92D0106, 112 22 2 1/ 22 23 1/ regulation problems by 96 T92C0114G03, 115GO3 28 4 1/114 7 7/ 15 3/ providing ±1% or better output voltage 94 T92C0114, 115, 121 26 5 3/18 9 5/1 16 5/ regulation over their 94 T92D0116 24 1 3/10 8 1/ 2 broad input range. Proven techniques 95 T92D0117, 125, 130, 155, 168 2220 0 1/ 3 combined with high 94 T92C0122, 123, 127, 128 18 5 1/17 6 3/ 2 quality components provide highly reliable, 90 T92D124, 129, 170 2910 3 99% efficient units with 92 T92D154, 176 32 1 1/22 2 1/ 65 1/ generous ratings and 92 T92D167 32 3 1/22 0 1/ 72 1/ high momentary overload capacity. 10 Volt-Pac Automatic Voltage Regulator Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 11 Volt-Pac Variable Autotransformer DIMENSIONS VoltPac Full Range Regulator / Controller For Use With Any Synchronous Motor Driven Variable Autotransformer The VoltPac 9T92PVC2 Full Range Regulator Controller is an intelligent microprocessor based unit. It regulates the output / load voltage of a motor operated variable voltage transformer to a user programmed value. These flexible units allow for operator definition of set point, dead-band, operating mode, frequency, and motor speed. Parameters are input through the keypad or serial 232, 422 or 485 ASCII communications port. The 5 digit 7 segment LED display provides local indication of output voltage and programmed set- tings. All parameters are also available through the serial port allowing for remote moni- toring and control of the unit. Keypad lockout, and auto / manual control capability allow application flexibility. The unit may be configured for one, two or three control channels for use on single and polyphase systems with single line or independent phase control. The motor pulsing feature allows for fine adjustment of the output without overshoot. Applications Features Electric Motor testing Quality control labs Microprocessor controller Regulation to +/- .5 volts Plating rectifier systems Voltage regulators High visibility LED display Up to 3 control channels Compressor testing Lamp & ballast testing Non volatile memory Std RS-232 com. Port Industrial processes Power Supplies True RMS sensing Adjustable deadband Appliance testing Telecom equipment testing Autoranging to 600 volts Automatic regulation Specifications Options Input signal 0 – 600 ACV Auto ranging RS – 422 Communications Controller Power 120 VAC 50 or 60 HZ @ 5 watts max RS – 485 Communications Control outputs Solid state relay 3 A 120 volt Model Number Configuration Accuracy +/- 0.4 VAC Model Configuration Response time less than 0.1 sec Cs hannels Communication Communications 9600 Baud,8 bits, No parity, 1 stop bit 12 A RS 23 Motor speed High or Low 9T92PVC2- 22 B RS 42 Control modes single line, independent phase or bypass Deadband 0 – 99.9 volts 35 C RS 48 Pulse adjust 0 – 99 volts 9T92PVC2- Mounting Schematic 12 Volt-Pac Variable Autotransformer DIMENSIONS DIMENSIONS for Manual, Single and Three-Phase Fig. 1 Frame 30 - 1 core Fig. 5 Frame 75 - 1 core Fig. 2 Frame 40 - 1 core Fig. 6 Frame 85 - 1 core Fig. 3 Frame 50 - 1 core Fig. 7 Frame 95 - 1 core Fig. 4 Frame 60 - 1 core Fig. 8 Frame 85 - 2 core Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 13 Volt-Pac Variable Autotransformer DIMENSIONS for Manual, Single and Three-Phase (Continued) Fig. 13 Frame 60 - 2, 3 cores Fig. 9 Frame 95 - 2 core Fig. 10 Frame 85 - 3 core Fig. 14 Frame 75 - 2, 3 cores Fig. 11 Frame 95 - 3, 4, 5, 6 cores Fig. 15 Frame 30 - 2, 3 cores Fig. 12 Frame 85 - 6 core Fig. 16 Frame 40 - 2, 3 cores 14 Volt-Pac Variable Autotransformer DIMENSIONS DIMENSIONS for Manual, Single and Three-Phase (Continued) Fig. 17 Frame 50 - 2, 3 cores Fig. 18 Terminal Details Terminal Detail A is applicable only to 75-frame Volt-Pac transformers, Detail B applies only to Frame-85 and 95. DIMENSIONS for Motor operated, single and three phase Fig. 19 Frame 30 - 1 core Fig. 21 Frame 50 - 1 core Fig. 20 Frame 40 - 1 core Fig. 22 Frame 60 - 1 core Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 15 Volt-Pac Variable Autotransformer DIMENSIONS MOTOR OPERATED, SINGLE AND THREE-PHASE (CONTINUED) Fig. 27 Frame 95 - 2 core Fig. 23 Frame 75 - 1 core Fig. 24 Frame 85 - 1 core Fig. 28 Frame 95 - 3, 4, 5, 6, 8, 9 core Fig. 25 Frame 95 - 1 core Fig. 29 Frame 60 - 2, 3 cores Fig. 26 Frame 85 - 2 core Fig. 30 Frame 75 - 2, 3 cores 16 Volt-Pac Variable Autotransformer DIMENSIONS MOTOR OPERATED, SINGLE AND THREE-PHASE (CONTINUED) Fig. 31 Frame 85 - 3 cores Fig. 34 Frame 85 - 6 cores Fig. 32 Frame 30 - 2, 3 cores Fig. 35 Frame 50 - 2, 3 cores Fig. 33 Frame 40 - 2, 3, cores Fig. 36 Cased unit dimensions Dimensions in inches Dimension Reference Wh idthDt ept Heigh 36A 16.00 17.00 8.50 36B 21.00 17.50 17.25 36C 21.00 17.50 23.00 36D 21.00 17.50 32.00 36E 21.00 17.50 44.00 36F 16.00 17.50 23.00 36G 16.00 17.50 30.50 36H 16.00 17.50 35.50 36J 16.00 17.50 48.50 36K 15.00 17.00 23.00 36L 21.00 17.50 34.00 36M 21.00 17.50 52.00 36N 21.00 17.50 70.00 36P 52.00 20.00 52.00 Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: sales@weschler.com . www.weschler.com 17