volt-pac variable autotransformer product features · automatic voltage regulators ... • single...

Table of ContentsPRODUCT 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

CALL US FOR MORE INFORMATION ATVOICE 440-238-2550 FAX 440-238-0660.

E-mail: [email protected]

CROSS REFERENCE TO MOST POPULAR COMPETITORS PRODUCTS

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• 99% Efficiency.• + 1% Output accuracy.• No distortion or harmonics.• Single & 3 phase, 120-480V models.• 1.5 Through 500 KVA sizes.• Analog or digital control.• Single or three line control.• Insensitive to Load power factor.

• Single and poly phase models.• Manual and motor driven models.• Programmable digital control option.• Open or enclosed construction.• 99% Efficiency.• 2.5 to 300 Amp capacity.• 120, 240 & 480V models.• Formerly manufactured by GE.

WARRANTY: All Weschler In-struments products are warrantedagainst material defects and work-manship for a period of one (1) yearfrom date of manufacture.

OPTIONS AND FEATURES MAYVARY BETWEEN MODELS, CON-TACT FACTORY FOR SPECIFICS.IN A CONSTANT EFFORT TO IM-PROVE OUR PRODUCTS, SPECI-FICATIONS MAY CHANGE FROMTHOSE PUBLISHED.

Product FeaturesVoltage Regulators Variable Transformers

Volt-Pac Variable Autotransformer

1

The Volt-Pac variable transformer pro-vides continuously adjustable voltage overa range of zero to either 100% or 117% ofthe line voltage. Its operation is simple andefficient, and is based on autotransformeraction.

The Volt-Pac coils are precision woundon a toroidally-shaped core. One face ofthe winding is properly smoothed and goldplated to provide a low resistance and longwearing track for the carbon brush. This plat-ing process has been developed to pro-vide efficient mating of brush and brush trackfor improved reliability of operation undersevere operating conditions. Operating lifehas been substantially improved as a re-sult. The core consists of strip-wound sili-con steel for low electrical losses. The coilis insulated from the core by means of amolded phenolic form.

To aid in heat dissipation a thermal radia-tor is mounted to, but electrically insulatedfrom the shaft. This thermal radiator alsoserves as a brush holder.

DESCRIPTIONManual and motor-operated Volt-Pac

models are listed in this publication. Manualunits provide fingertip voltage control whenthe Volt-Pac is easily accessible; use themotor-operated type for remote and auto-matic control or for large power ratings in-convenient to operate by hand. Roundingout the complete Volt-Pac line, automaticVolt-Pac models can be furnished to pro-vide closely regulated output voltages.

Manual and motorized Volt-Pacs can befurnished in either uncased or cased con-struction. Cased 50, 60 and 75 frame singleand multi-coil units are supplied with termi-nals exposed. Terminial enclosure kits listedon page 9 may be purchased separately.Cased 85 and 95 frame units are suppliedfully enclosed in a NEMA 1 rated enclo-sure. The general configuration of Volt-Pacmodels will vary depending upon the num-ber of cores and how they are stacked to-gether to achieve different ratings.

UL-recognized insulation systems havebeen used throughout. In addition, UL com-ponent listings are applicable to many ofthe models identified on the followingpages.

NO WAVEFORM DISTORTIONVolt-Pac variable transformers provide an

output voltage waveform that is a precisereproduction of the applied input waveform.

1 - New unique plating process on brushtracks results in long life operation. Thisultra reliable feature is now furnishedon all models.

2 - Output voltage selector.3 - Standard steel shaft is easy to replace

or modify.4 - Aluminum radiator dissipates heat, pro-

tects brush track.5 - Self-lubricating nylon bearings for

smooth, reliable rotation.

6 - Cast-aluminum base for maximum heatdissipation provides easy surface orback-of-panel mounting.

7 - Insulation between core-and-coil andmetallic base.

8 - Precision bank-wound coils.9 - Spring-loaded solid-carbon brush.10- Dial plate fits on shaft and provides ref-

erence for voltage selection.11- Corrosion-resistant parts used throughout.

MILLION OPERATION TEST PROVIDESRELIABILITY

With a minimum of moving parts, Volt-Pacvariable transformers are virtually mainte-nance-free. At the point of critical contact,where the carbon brush travels on the coilsurface, extra reliability is built in to assurelong-life operation.

Starting with precision wound coils(wound under constant tension) a smoothsurface is provided for the brush track. Criti-cal tolerances are maintained during thisprocess, a 0.001 in. error results in a reject!On the track area, epoxy cement is added.The coil is then oven-cured. Results are,each length of wire is immobilized, lockedfirmly in position to provide rigid perma-nence and electrical reliability.

Then the brush track is smoothed to a gem-like finish on a lapping machine. This lap-ping process exposes the surface of each

copper conductor to a prescribed depth, re-sulting in a uniformly flat, polished area onwhich the carbon brush travels.

The polished surface is thoroughlycleaned prior to plating to assure maximum"take" of the gold alloy plating process. Goldalloy is used to provide a low resistance,nonoxidizing surface which prevents over-heating and associated burnout problems.

Over this durable, ultra-smooth surface,rides a spring-loaded, grain-oriented solidcarbon brush. The contact between surfacesis so precise that laboratory tests show overone-million operations result in brush wearof less than 0.01 in.

When you specify Volt-Pac variable trans-formers, you're getting precision equipmentdesigned for maximum life with minimummaintenance.

APPLICATIONVolt-Pacs are presently at work onmany electronic and electricalapplications including:

• Power supplies• Laboratory instruments• Test equipment• Speed control devices• Computer peripheral equipment• Welding controls• High-voltage precipitators• Variable speed devices for large machinery• Electroplating• High-voltage electronic tube circuits

Cut-a-way view of 60-frame Volt-Pacvariable transformer.

PRODUCT OVERVIEW

1

2

3

4

5

6

7

8

9

10

Many other types of voltage control devices(such as phase-control semiconductors andsaturable reactors) introduce distortion ofthe voltage waveform. For detailed appli-


cation information regarding waveform char-acteristics and Volt-Pac transformers, seethe "waveform distortion" discussion onpage 2.

2

CURVE 4. Chart used to determine regula-tion factor in percent.

CURVE 3 - Short-duration overload.

RATED AND MAXIMUM AMPERESRated amperes is the output current that

can be drawn from the Volt-Pac transformerat any position of the output voltage selec-tor, with either line (0-100%), or over-volt-age (0-117% output) connections.

Note that rated current is maintained withminimum resistance between track andbrushes and is dependent on periodic move-ment of the brushes. Leaving the brushes inone spot for extended periods will graduallyincrease contact resistance and may resultin eventual overheating and damage to theVolt-Pac unit.

Maximum amperes is the output currentwhich can be safely drawn only when theoutput voltage selector is at the full-rangeposition and connected for line voltage out-put. Maximum amperes must be decreasedproportionately as output voltage is de-creased until rated current is reached. Asshown in Curve 2, any value of current in theshaded area may be safely drawn. NOTE:maximum amperes must not be drawn onover-voltage connections.

CURVE 2. Maximum amperes must be de-creased linearly with output voltage untilrated amperes is reached.

KVA RATINGSKVA is a common term of rating for trans-

formers with fixed outputs. However, on vari-able voltage devices such as the Volt-Pac,the KVA varies as the output voltage ischanged; consequently, no single KVA rat-ing is definitive. Therefore, Volt-Pac trans-former listings are presented in terms of cur-rent and voltage rating separately.

WAVE-FORM DISTORTIONVolt-Pac variable transformers, being un-

saturated magnetic components, do not in-troduce wave-form distortion. With Volt-Pactransformers, the output voltage waveformis a precise reproduction of the applied in-put wave-form. This is true for both singleand three phase units.

REGULATION (60-HERTZ)Volt-Pac transformers provide excellent

load regulation, with very small changes inoutput voltage occurring from no load to fullload. Curve 4 enables you to find the per-cent regulation factor for any of the threebasic type of Volt-Pac transformer connec-tions. This percent factor, times the appropri-ate "regulation volts” from Table A, at right,gives the output voltage drop for any Volt-Pac transformer model number.

CALCULATING REGULATIONTo determine the regulation of any Volt-Pac

transformer application, follow this simplethree-step approach:

1. DETERMINE REGULATION FACTOR INPERCENT-- Establish, in percent, the posi-tion of the output voltage selector in relationto its full rotation. Start with this point on thebottom of the curve representing the Volt-Pacconnection you are using. At the point of in-tersection, read directly left and identify theregulation factor in percent.

Example: Volt-Pac transformer is set at the80 percent output voltage selector positionwith 0-100% range connection. Read up from80 percent until you intersect the solid col-ored curve. Read left to the regulation factorwhich is 69 percent.

2. DETERMINE REGULATION VOLTSDetermine proper rated current for the Volt-Pac from model number listings on pages 4- 7. From Table A and this current rating, de-termine “ regulation” volts.

Example: You are applying Model Num-ber 9T92A10. The product listing shows ratedamperes to be 12.0. Matching 12.0 amps with“regulation ” volts in Table A, you get 2.3 volts.

TABLE A "REGULATION"VOLTS BY RATED AMPERES

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CURVE 1. Current must be derated as shownwhen operating 240-volt units on 120V tap or480V units on 240V tap.

OVERLOAD CAPACITYVolt-Pac transformers have the capac-

ity to handle non-repetitive short-durationoverload currents as shown in Curve 3.

For example, any Volt-Pac unit cansafely withstand 250 percent rated cur-rent for five minutes, as long as this con-dition is not repetitive.

OUTPUT VOLTAGE RANGEMost Weschler Instruments Volt-Pac vari-

able transformers can be connected to ad-just output voltage as a percent of inputvoltage over a range of either 0 to 100% or0 to 117%. Refer to page 8 for connectiondetails.

However, when using units connected for0 to 117% range, rated amperes (as shownin the product listings on pages 4-7 mustnot be exceeded.INPUT VOLTAGE TAP

Many 240 and 480 volt input units areequipped with a tap for use on 120 or 240volt lines while maintaining rated outputvoltage, i.e., 0-280 or 0-560 volts. However,when operating Volt-Pac units on the lowerinput voltage tap, rated current must be re-duced in accordance with Curve 1 belowwhen output voltage exceeds 140 percentof input voltage.

For example, model 9T92A40, havingrated current of 16 amps, must not drawmore than 11.5 amps (72 percent x ratedcurrent) when operating at 200 volt outputwith 120 volt input.

Maximum amperes capability is most sig-nificant when the load has constant imped-ance; that is, when the output current auto-matically decreases in proportion to thevoltage applied-- such as with resistive loads.

General Performance InformationVolt-Pac Variable Autotransformer

the advantage of providing output voltagewhich varies linearly in proportion to theangle of rotation of the output voltage selec-tor. Because of the large number of incre-ments of output voltage selection, the outputvoltage is virtually stepless.

HIGH EFFICIENCYVolt-Pac variable transformers have low

electrical losses under all load conditions.Efficiency is 98.5 percent when the outputvoltage selector is at full rotation. This effi-ciency remains high, even at greatly reducedload voltage. The efficiency curve (CURVE6) is typical for all Volt-Pac transformer rat-ings, including 240 and 480-volt ratings.

3

TABLE A NOTES:On model numbers having rated amps

greater than shown on chart, convert to chartvalues as follows :

120 VOLT, 1-PHASE—divide rated ampsby number of cores.

240 VOLT, 3-PHASE—divide rated ampsby 1/3 the number of cores.

240 VOLT, 1-PHASE—divide rated ampsby number of cores.

480 VOLT, 1-PHASE—divide rated ampsby 1/2 number of cores.

480 VOLT, 3-PHASE—divide rated ampsby 1/3 number of cores.

Chart for ambients above 40 0 C, Volt-Pac vari-able transformers should be derated in ac-cordance with this curve.

AMBIENT TEMPERATUREVolt-Pac transformer models are designed

for continuous operation in ambients of –200Cto 400C, at full rated load. When operatedabove 400C, units must be derated in accor-dance with Curve 5. For example, when oper-ating model 9T92A5 in a 60 C ambient, ratedamperes would be: 87% X 4.5 = 3.92. Maxi-mum amperes would be: 87% X 5.8 = 5.05.

POWER FACTORLoad power factor has very little effect on

the operation of a Volt-Pac transformer in therange from 0.5 lagging to 0.5 leading. Likeany transformer, the Volt-Pac reflects the loadpower factor to the line with very little change.Only for very light loads, possibly under 10%,will the lagging power factor of the Volt-Pacbecome significant.

SERIES AND PARALLEL CONNECTIONSSingle-phase Volt-Pac transformers are not

suitable for series or parallel connection inthe field because of the problems associatedwith field-adaption of single-phase units forcommon shaft operation. ( Common shaft op-eration is required to prevent unbalancedloads and circulating currents. )Even factorymodels, with common shaft operations, andparallel connected coils, are provided withintercoil reactors to minimize circulating cur-rents.

OPTIONSFUSES-You may wish to fuse the brush lead

(lead No. 3) of your Volt-Pac transformer forthe maximum current rating applicable to yourmodel. This is good practice and protects theVolt-Pac unit against unforeseen overloads.

TAPS-Fixed-voltage taps can be providedat specific voltage levels depending on framesize and rated voltage. Such taps may requirederating of the variable power output of theVolt-Pac unit to stay within the total powerrating of the unit.

SHAFT MODIFICATIONS -The shaft pro-vided with each model accommodates theVolt-Pac transformer's voltage selector knobwhen mounted on panels not exceeding thethickness shown in dimension data. Modifi-cation to the shaft, either in length or end-diameter, is available for both manual andmotor-operated units.

MECHANICAL STOPS (MANUAL UNITSONLY)-Mechanical stops are special addi-tional clamps which can be provided to con-fine the angle of rotation of the voltage se-lector to a portion of the total travel. Theadditional mechanical stops establish a mini-mum output voltage above zero, and a maxi-mum output voltage below rated.

POSITIONING POTENTIOMETER-A preci-sion potentiometer can be mounted on anextended shaft of the Volt-Pac unit and canbe used to reflect a signal proportional to theangle of rotation of the output voltage selec-tor. Such a potentiometer is normally used inthe bridge circuit of a controller.

LIMIT SWITCHES-All Weschler motor-op-erated Volt-Pac transformers have a limitswitch at each end of the winding to preventover-travel of the voltage selector. ManualVolt-Pac units have mechanical stops to pro-vide the same function. All Volt-Pac transform-ers can be provided with additional limitswitches to actuate other control circuitry atpredetermined positions (or specified lengthsof travel) of the output voltage selector.

FREQUENCYWith the exceptions noted in the Model

Number listings on pages 4-7, all Volt-Pacvariable transformers are designed for op-eration at 50/60 Hz. They may be operatedat higher frequencies, without derating, how-ever regulation becomes poorer. Units listedfor 240-volt operation may be applied on120-volt, 25-Hz. supplies at listed currentratings using 240-volt line connections.

LINEAR OUTPUT VOLTAGECompared with other adjustable voltage

control devices, Volt-Pac transformers have

3. MULTIPLY REGULATION VOLTS BYPERCENT FACTOR. The 2.3 volts in Step 2,multiplied by the “ regulation ” factor of 69percent from Step 1, indicates a 1.6 volt dropin output voltage when output currentchanges from zero to full load at the speci-fied 80% selector position.

CURVE 5

THREE-PHASE CONNECTIONSVolt-Pac transformers rated for three-phase

circuits are suitable for connection to eitherdelta or wye connected incoming powersources or loads. These three-phase mod-els consist of multiples of two or three single-phase units electrically connected in wye oropen delta. Wye connected units have aneutral connection accessible. A commonshaft rotates the output voltage selector ofall the component core and coils in unison.Wye connected Volt-Pac transformers canbe used to feed 3-wire, 3-phase balancedloads. However, the common connection (or"neutral") of the Volt-Pac unit must not beused. This also applies if the system input is3-wire, 3-phase (delta) with midpoint con-nection in one of the phases.

With a three phase, 4-wire system input,the system neutral should be solidly con-nected to the common or "neutral" point ofthe Volt-Pac unit. This will prevent neutralshift and possible damage or failure of theunit. Full-range voltage control cannot beobtained from a three-phase Volt-Pac unitconsisting of three single-phase units con-nected in closed delta. Outside the factory, itis not practical to convert multiple single-phase models to balanced three-phase ap-plications because of associated mechani-cal problems.

CURVE 6 Volt-Pac units.Typical efficiency curve.

General Performance InformationVolt-Pac Variable Autotransformer

4

1. When over voltage connection is used, rated current should not be exceeded.2. When using extended tap connections, operation is for 60-hertz only.3. Output at overvoltage connection is 0-110% of input voltage.4. When operated with this input voltage, rated current must be reduced in accordance with Curve 1, page 2, when output voltage exceeds 140% of input voltage.5. 60 hertz only.

6. For line-voltage connection only, no overvoltage connection provided.7. Shipped connected for 0-100% of input voltage.8. Shipped connected for 0-117% of input voltage.9. Component listed by UL, uncased units only. Add suffix AIM to model No.10. Order 1 terminal enclosure kit per core to convert this model to

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The manual Volt-Pac transformer is oneof 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 afixed line voltage. It's operation is simpleand is based on autotransformer action.

For information about motor-operated Volt-Pac units, see pages 6-7.

MANUAL, SINGLE-PHASEVolt-Pac Variable Autotransformer

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0.660.070.990.501

59-459-459-659-6

96A29T907A29T917A29T927A29T9

4G96A29T94G07A29T94G17A29T94G27A29T9

------------------------------

11111111

D63D63E63E63

562872093314

533043064574

UL LISTINGAll manual, single-phase, uncased, 30, 40, 50 and 60 frame sizes have

component listing as noted.

MANUAL, THREE-PHASE

Terminal Enclosure Kits see page 9



enclosed terminals.


Weschler Instruments 440-238-2550 . Fax 440-238-0660 . E-mail: [email protected] . www.weschler.com

6

egatloVeniL)%001-0(

roegatloVrevO


serepmAdetaR



ecnadepmI)sdaoL

fo.oN&seroCemarF

eziS

DESACNUSLEDOM

DESACSLEDOM

tooFsetoN

ENILTUOSNOISNEMED

.xorppA.bL.tWteN

.oNledoMrof9.gPeeS(gnitarepOrotoM

)semiT


)semiT

desacnU.giFeeSsegaP.oN

61-51

desaC.giFeeSsegaP.oN

1-51 7

desacnU desaC

)NOITCENNOCEGATLOVREVO(TLOV041-0)NOITCENNOCEGATLOVENIL(TLOV021-0TUPTUO:TUPNITLOV021

5.60.01

0.85.11

05-106-1

15G7C29T915G9C29T9

45G7C29T945G9C29T9

01,3,201

1222

1222

3141

4161

0.210.510.810.03

5.410.917.120.43

06-157-157-158-1

15G01C29T915G72C29T915G82C29T915G73D29T9

45G01C29T945G72C29T945G82C29T945G73D29T9

01,6,501,201,2

2

22323242

223333F63

41121294

61030378

0.430.050.060.86

0.730.550.060.47

58-159-159-158-2

15G83D29T915G94D29T915G05D29T915G14D29T9

45G83D29T945G94D29T945G05D29T945G14D29T9

2--------------------

2

42525262

F63K63K63G63

94787858

78511721341

0.0010.0210.0510.0020.0520.0030.063

0.0110.0210.5610.0220.5720.0330.063

59-259-259-359-459-559-659-6

15G35D29T915G45D29T915G55D29T915G65D29T915G75D29T915G85D29T915G95D29T9


----------------------------------------------------------------------

72728282828282

L63L63L63M63M63M63M63

051051042003063024024

522522513504564525525


0.40.50.75.8

0.58.61.010.11

06-106-157-157-1

15G31C29T915G41C29T915G92C29T915G03C29T9

45G31C29T945G41C29T945G92C29T945G03C29T9

0101,6

0101,2

22223232

22223232

41411212

61610303

0.210.410.610.03

5.410.410.610.33

06-258-158-159-1

14G32C29T915G93D29T915G04D29T915G15D29T9

45G32C29T945G93D29T945G04D29T945G15D29T9

01,6,522

----------

92424252

92F63F63K63

82949478

927878511

0.530.060.090.0210.0510.0810.012

0.530.660.990.2310.5610.8910.012

59-159-259-359-459-559-659-6



----------------------------------------------------------------------

52728282828282

K63L63L63M63M63M63M63

78051042003063024024

511522513504564525525


0.40.50.75.8

0.58.61.010.11

06-206-257-257-2

15G71C29T915G81C29T915G13C29T915G23C29T9

45G71C29T945G81C29T945G13C29T945G23C29T9

0101,601,201,2

92920303

92920303

82828383

92920505

0.410.610.030.530.06

0.410.610.330.530.66

58-258-259-259-259-4

15G24D29T915G34D29T915G76D29T915G86D29T915G96D29T9


22

------------------------------

6262727282

G63G63L63L63M63

5858051051003

231231522522504

0.070.090.5010.021

0.070.990.5010.231

59-459-659-659-8

15G07D29T915G17D29T915G27D29T915G37D29T9

45G07D29T945G17D29T945G27D29T945G37D29T9

----------------------------------------

82828282

M63M63M63N63

003024024045

504525525576

MOTOR-OPERATED, SINGLE-PHASE

Weschler Instruments motor-operated Volt-Pac units differ from manual types primarily inthe means used to rotate the shaft to vary out-put voltage. A self-synchronous motor is usedto position the output voltage selector. The mo-tor is reversible by means of a SPDT switch (not supplied ) and operates on 120-volt, 50/60 hertz circuits.

Typical methods for controlling Weschler In-struments motor-operated Volt-Pacs include:

(1) Manual raise-lower switch—can consistof either momentary-contact push-button orlever-type toggle switch.

(2) Relays and contactors—control the raise-lower power to the motor as a result of low-level signals from external circuitry. Example:photoelectric cells or thermostat signals canprovide the input.

(3) Process control instrumentation—forclosed-loop, precise control, more sophisti-cated circuitry can be used to provide theraise-lower switching for the motor.

If you require motor operating times other thanthe 26 seconds, you drop the -G51 or -G54suffix in the Volt-Pac model listing and replace itwith a suffix from the table on page 9.



enclosed terminals.


7

egatloVeniL)%001-0(

roegatloVrevO


serepmAdetaR



ecnadepmI)sdaoL

fo.oN&seroCemarF

eziS

DESACNUSLEDOM

DESACSLEDOM

tooFsetoN

ENILTUOSNOISNEMED

.xorppA.bL.tWteN


)semiT


)semiT

desacnU.giFeeSsegaP.oN

71-51

desaC.giFeeSsegaP.oN

71-51desacnU desaC

)NOITCENNOCEYW()NOITCENNOCEGATLOVREVO(TLOV082-0)NOITCENNOCEGATLOVENIL(TLOV042-0TUPTUO:TUPNITLOV042

5.60.01

0.85.11

05-306-3

15G91C29T915G12C29T9

45G91C29T945G12C29T9

01,5,301,2

5392

5392

0383

2314

0.210.510.810.03

5.410.917.120.43

06-357-357-358-3

15G22C29T915G33C29T915G43C29T915G44D29T9

45G22C29T945G33C29T945G43C29T945G44D29T9

01,6,501,201,2

2

92030313

920303H63

835555511

140707271

0.430.050.060.86

0.730.550.060.47

58-359-359-358-6

15G54D29T915G47D29T915G57D29T915G84D29T9

45G54D29T945G47D29T945G57D29T945G84D29T9

2222

13828243

H63L63L63J63

911042042522

271513513003

0.0010.0210.0510.0810.002

0.0110.0210.5610.0810.002

59-659-659-959-959-21



2----------

2----------

7

82828282

----------

M63M63N63N63P63

024024006006018

525525537537589

0.0020.0520.0520.0030.003

0.0020.0520.0520.0030.003

59-2159-5159-5159-8159-81



87878

--------------------------------------------------

P63P63P63P63P63

0180001000100210021

5890811081100410041)NOITCENNOCEYW()NOITCENNOCEGATLOVREVO(TLOV065-0)NOITCENNOCEGATLOVENIL(TLOV084-0TUPTUO:TUPNITLOV084

TLOV065-0TUPTUO:TUPNITLOV042RO )4etoN(0.40.50.75.8

0.58.61.010.11

06-306-357-357-3

15G52C29T915G62C29T915G53C29T915G63C29T9

45G52C29T945G62C29T945G53C29T945G63C29T9

01,201,6,5

01,201,2

92920303

92920303

83835555

14148787

0.410.610.030.530.06

0.410.610.330.530.66

58-358-359-359-359-6



22222

1313828282

H63H63L63L63M63

511511042042024

271271513513525

0.070.090.5010.0210.0210.051

0.070.990.5010.0210.0210.051

59-659-959-959-2159-2159-51

15G18D29T915G48D29T915G58D29T916G014C29T917G014C29T916G114C29T9

45G18D29T945G48D29T945G58D29T946G014C29T947G014C29T946G114C29T9

222787

828282

---------------------------

M63N63N63P63P63P63

0240060060180180001

5255375375895890811

0.0510.0810.0810.012

0.0510.0810.0810.012

59-5159-8159-8159-12

17G114C29T916G214C29T917G214C29T916G314C29T9

47G114C29T946G214C29T947G214C29T946G314C29T9

8787

------------------------------------

P63P63P63P63

0001002100210041

0811004100410061

0.0120.0420.042

0.0120.0420.042

59-1259-4259-42

17G314C29T916G414C29T917G414C29T9

47G314C29T946G414C29T947G414C29T9

878

---------------------------

P63P63P63

004100510051

006100710071

)NOITCENNOCEGATLOVENIL(TLOV042-0TUPTUO:TUPNITLOV042)NOITCENNOCATLEDNEPO()NOITCENNOCEGATLOVREVO(TLOV-082-0

0.40.50.75.8

0.58.61.010.11

06-206-257-257-2

15G71C29T915G81C29T915G13C29T915G23C29T9

45G71C29T945G81C29T945G13C29T945G23C29T9

0101,601,201,2

92920303

92920303

82828383

2/1822/182

0505

0.410.610.030.530.06

0.410.610.330.530.66

58-258-259-259-259-4



22

------------------------------

6262727282

G63G63L63L63M63

5858051051003

231231522522504

0.070.090.5010.021

0.070.990.5010.231

59-459-659-659-8

15G07D29T915G17D29T915G27D29T915G37D29T9

45G07D29T945G17D29T945G27D29T945G37D29T9

----------------------------------------

82828282

M63M63M63N63

003024024045

504525525576

MOTOR-OPERATED, THREE-PHASE

MOTOR OPERATING TIMEMotor operating time refers to the number of

seconds for the motor to traverse its full rangein one direction. In the motor-operated listing,most Volt-Pac model numbers are standard26-second motor operating time.

If you require motor operating times other thanthe 26 seconds, you drop the -G51 or -G54suffix in the Volt-Pac model listing and replace itwith a suffix from the table on page 9.



enclosed terminals.



8

TERMINAL ARRANGEMENTSWeschler Instruments Volt-Pac trans-

former terminal boards are constructedand imprinted to facilitate connection toline and load. Most terminal boards aredesigned for ring or spade terminals and1/4" female quick-connect terminals. Thetable at right illustrates typical terminalconnections for many common ratings.Specific terminal details are shown withthe outline diagrams on pages 13-17.

CONNECTIONS FOR COMMONLY USED RATINGS

TERMINAL ARRANGEMENTS, CONNECTIONS AND WIRING

OPTIONS AND FEATURES MAY VARY BE-TWEEN MODELS, CONTACT FACTORY FORSPECIFICS. IN A CONSTANT EFFORT TO IM-PROVE OUR PRODUCTS, SPECIFICATIONSMAY CHANGE FROM THOSE PUBLISHED.

NOTES FOR CONNECTIONSNOTE 1.Connection diagrams for single-phase rat-ings using more than two cores, and for three-phase (wye) ratings using more than threecores, may be obtained by contacting yourWeschler Instrument sales representative.

NOTE 2.Ratings which have no tap connection uti-lize a three-terminal arrangement NOTshown in the adjacent connection diagrams.

NOTE 3.Three-phase unit is shipped with knob onthe end of unit opposite the base and withjumpers connecting terminals 1-1-1, (clock-wise rotation will raise voltage). If knob ismoved to the other end, remove jumpersfrom 1-1-1, and connect terminals 4-4-4 (thiswill maintain clockwise rotation to raise volt-age).

WIRING DIAGRAMSBelow are wiring diagrams for twobasic types of Volt-Pac variable

transformer connections.


smargaiDlanimreT noitcennoC

desUslanimreT

gnitnuoMecafruSesiwkcolC(

nobonK)noitatoRetisoppOdnE

esaB

lenap-fo-kcaBgnitnuoMesiwkcolC(

nobonK)noitatoRdnEesaB

EMARF03,TUPTUOTLOV-231/021-0,TUPNITLOV-021,EROC-ELGNIS,ESAHP-ELGNIS

tupnItuptuO

V021V021-0

2-13-1

tupnItuptuO

V021V231-0

4-13-1

)EMARF03TPECXE(,TUPTUOTLOV-041/021-0,TUPNITLOV-021,EROC-ELGNIS,ESAHP-ELGNIS

tupnItuptuO

V021V021-0

4-13-1

1-43-4

tupnItuptuO

V021V041-0

2-13-1

5-43-4

,TUPNITLOV-042ROTLOV-021,EROC-ELGNIS,ESAHP-ELGNIS TUPTUOTLOV-082/042-0

tupnItuptuO

V021V082-0

6-13-1

7-43-4

tupnItuptuO

V042V042-0

4-13-1

1-43-4

tupnItuptuO

V042V082-0

2-13-1

5-43-4

TUPTUOTLOV-065/084-0,TUPNITLOV-084RO-042,EROC-OWT,ESAHP-ELGNIS

tupnItuptuOrepmuJ

V042V065-0

6-63-31-1

7-73-34-4

tupnItuptuOrepmuJ

V084V084-0

4-43-31-1

1-13-34-4

tupnItuptuOrepmuJ

V084V065-0

2-23-31-1

5-53-34-4

TUPTUOTLOV-082/042-0,TUPNITLOV-042,EROC-EERHT,)EYW(ESAHP-EEHRT

tupnItuptuOrepmuJ

V042V042-0

4-4-43-3-31-1-1

1-1-13-3-34-4-4

tupnItuptuOrepmuJ

V042V082-0

2-2-23-3-31-1-1

5-5-53-3-34-4-4

TUPTUOTLOV-065/084-0,TUPNITLOV-084RO-042,EROC-EERHT,)EYW(ESAHP-EERHT

tupnItuptuOrepmuJ

V042V065-0

6-6-63-3-31-1-1

7-7-73-3-34-4-4

tupnItuptuOrepmuJ

V084V084-0

4-4-43-3-31-1-1

1-1-13-3-34-4-4

tupnItuptuOrepmuJ

V084V065-0

2-2-23-3-31-1-1

5-5-53-3-34-4-4

TUPTUOTLOV-041/021-0,TUPNITLOV-042RO-021,EROC-OWT,)ATLEDNEPO(ESAHP-EERHTTUPTUOTLOV082./042-0,TUPNITLOV-042DNA

tupnItuptuOrepmuJ

V021V021-0

4-1-43-1-3

1-1

1-4-13-4-3

4-4

tupnItuptuOrepmuJ

V021V041-0

2-1-23-1-3

1-1

5-4-53-4-3

4-4

tupnItuptuOrepmuJ

V042V042-0

4-1-43-1-3

1-1

1-4-13-4-3

4-4

tupnItuptuOrepmuJ

V042V082-0

2-1-23-1-3

1-1

5-4-53-4-3

4-4

9

Motor operating time refers to the number of seconds for the motor to traverse its full range in one direction. In the motoroperated 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 fromthe table below.

).ceS(noitarepOfoemiT .oNxiffuSddA ).ceS(noitarepOfoemiT .oNxiffuSddA

ztreh06 ztreh05 desacnU desaC ztreh06 ztreh05 desacnU desaC

*seziSemarF57dna06,05,04,03llAroF seziSemarF59dna58llAroF

4.4 3.5 12G 42G 7.3 4.4 12G 42G

1.31 7.51 14G 44G 7.8 4.01 13G 43G

2.62 4.13 15G 45G 2.81 8.12 14G 44G

6.45 6.56 16G 46G 2.62 4.13 15G 45G

6.45 5.56 16G 46G

SUFFIX TABLE

MOTOR OPERATING TIME

TERMINAL ENCLOSURE KITSWhen Volt-Pac models with enclosed ter-

minals are required, modification kits canbe purchased economically to convert ex-posed-terminal models to enclosed ones.A different terminal kit is available foreach Volt-Pac frame size. The frame sizeand number of cores for each Volt-Pacunit is listed in the third column of the

roFemarF

eziSrebmuNledoMredrO

03

05

06

57

58

elbaliavastikon

309Y81T9

2G309Y81T9

3G309Y81T9

4G309Y81T9

---------------

ylnotiK

ylnotiK

ylnotiK

ylnotiK

TERMINAL ENCLOSURE KIT

tables on pages 4-7. Always order a quan-tity of kits corresponding to the numberof cores. For example, when an enclosedversion of Volt-Pac Model 9T92A41G2 isdesired, order one (1) Volt-Pac Model No.9T92A41G2 and two (2) kits, Model No.9T18Y903G4. See dimensions below.

Note: Refer to pages 13-15 for detailed dimensions of cased models with exposed terminals. When proper Fig. No. from pages13-15 has been located, the diagrams and table below will provide overall dimensions for cased units with enclosed terminals.

.oN.giF.sgPmorF

51-31

emarF&eziSfo.oNseroC

sehcnInisnoisnemiD

A A1

3456

1-051-061-571-58

----------------------------------------

8/568/56

821

8012131

2-583-586-582-06

8/3214/1218/711

4/17

----------------------------------------

3141417171

3-062-573-572-053-05

4/178/588/584/174/17

--------------------------------------------------

DIMENSIONS - CASED MODELS with TERMINAL ENCLOSURE KIT

CONTROLKNOB

TERNINALENCLOSURE KIT

TOP VIEW



10

Volt-Pac Automatic Voltage Regulator

SNOITACILPPA

:tsacdaorB eliboMdna,soidutS,srevieceR,srettimsnarTstinunoitcudorp

lairtsudnI : ,gnitaeHecnatsiseR,smetsySgnitalP,rotoMegraL,sehctulCdnasdioneloScitengaM,looTenihcaMtnempiuqEtseT,tnempiuqEnoitubirtsiD,sredleW

seilppuSrewoP

eniraM : rewoPerohSdnadraobpihSlaicremmoCdnaetavirPgninoitidnoC

laicremmoC : ecnasiuNSPU,srellihC,slortnoCrotavelE,gnithgiLsgnidliuBesiRhgiH,noitneverPpirT

lacideM : tnempiuqEnacSTAC,IRM,yaR-X

cinortcelE : snoitacinummoceleT,sretupmoC,radaR

SERUTAEF

%1±ycaruccAegatloVtuptuOtnellecxE ngiseDecnadepmIwoL

lacipyTycneiciffE%99 yticapaCdaolrevOhgiH

scinomraHronoitrotsiDmrofevaWoN ecnanetniaMwoL

rotcaFrewoPdaoLoTevitisneStoN 02- 0 04+ot 0 egnaRerutarepmeTgnitarepOtneibmAC

noitcerroCegatloVtsaF daoLotrewoPtpurretnItoNlliWnoitalugeRfossoL

egatloVtuptuOelbatsujdA segnahCycneuqerFotevitisnesnI

hctiwSrewoL-esiaRlaunaM )egnaRgnitarepOZH36-74(

tupnIworraNdnaediW elbatceleSegnaRegatloV

detnuoMkcaRrotenibaC sledoMesahP-eerhTdnaelgniS

erusolcnEfoorP-pirDdetalitneVroodnI elbaliavAsledoMdetaRAVK005ot5.1

dedulcnIretemtloVtuptuO tiucriClortnoCdesuF

ytnarraWraeY-enO

SNOITPO

lortnoClatigiD sretemmA

segnaRtupnIdetfihS stcatnoCmralAegnaRegatloVtupnI

reteMycneuqerF

rebmuNgolataC)sehcnI(snoisnemiD

A B C

011,901,401,301,201,1010C29T9 4/302 61/1191 8/59

111,5010D29T9 8/702 22 8/131

211,6010D29T9 2/122 22 2/132

3OG511,30G4110C29T9 61/142 8/771 4/351

121,511,4110C29T9 4/352 61/591 8/561

6110D29T9 4/312 4/181 02

861,551,031,521,7110D29T9 52 2/102 03

821,721,321,2210C29T9 4/151 8/361 72

071,921,421D29T9 02 91 03

671,451D29T9 2/113 2/122 2/156

761D29T9 2/133 2/102 2/127

Almost every aspectof our lives is affectedwhen electric powerbecomes unstable.Dependence on qualitypower increases whilepower problemsbecome morepredominate.Generation capacityand the distributionsystem have not keptpace with increaseddemand for electricity.Competition forcesequipmentmanufacturers to pushcomponent limits,making them moresensitive to voltagefluctuations. Manyelectrical loads nowcreate voltageimbalances due to nonsinusoidal currentdraw. Power companycorrections for lowvoltage in one arearesult in high voltagein another. Poor powerquality is a silent killercausing unexplainedequipment glitches andpremature failures,increasing downtimeand cost. Surveysshow voltage sagsrepresent 87% of shortterm powerdisturbances. VoltPacVoltage Regulatorssolve voltageregulation problems byproviding ±1% orbetter output voltageregulation over theirbroad input range.Proven techniquescombined with highquality componentsprovide highly reliable,99% efficient units withgenerous ratings andhigh momentaryoverload capacity.

11

Volt-Pac Automatic Voltage Regulator


12

DIMENSIONS

VoltPac Full Range Regulator / Controller

Applications Features

Electric Motor testing Quality control labs Microprocessor controller Regulation to +/- .5 voltsPlating rectifier systems Voltage regulators High visibility LED display Up to 3 control channelsCompressor testing Lamp & ballast testing Non volatile memory Std RS-232 com. PortIndustrial processes Power Supplies True RMS sensing Adjustable deadbandAppliance testing Telecom equipment testing Autoranging to 600 volts Automatic regulation

Specifications Options

Input signal 0 – 600 ACV Auto ranging RS – 422 CommunicationsController Power 120 VAC 50 or 60 HZ @ 5 watts max RS – 485 CommunicationsControl outputs Solid state relay 3 A 120 voltAccuracy +/- 0.4 VACResponse time less than 0.1 secCommunications 9600 Baud,8 bits, No parity, 1 stop bitMotor speed High or LowControl modes single line, independent phase or bypassDeadband 0 – 99.9 voltsPulse adjust 0 – 99 volts

The VoltPac 9T92PVC2 Full Range Regulator Controller is an intelligent microprocessorbased unit. It regulates the output / load voltage of a motor operated variable voltagetransformer to a user programmed value. These flexible units allow for operator definitionof set point, dead-band, operating mode, frequency, and motor speed. Parameters areinput through the keypad or serial 232, 422 or 485 ASCII communications port. The 5 digit7 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 allowapplication flexibility. The unit may be configured for one, two or three control channels foruse on single and polyphase systems with single line or independent phase control. Themotor pulsing feature allows for fine adjustment of the output without overshoot.

For Use With Any Synchronous MotorDriven Variable Autotransformer

Mounting Schematic


noitarugifnoCrebmuNledoM

ledoM noitarugifnoC

-2CVP29T9

slennahC snoitacinummoC

1 232SRA

2 224SRB

3 584SRC

2CVP29T9 -

Fig. 1 Frame 30 - 1 core








DIMENSIONS for Manual, Single and Three-Phase

13

DIMENSIONSVolt-Pac Variable Autotransformer


14


Fig. 14 Frame 75 - 2, 3 cores

Fig. 11 Frame 95 - 3, 4, 5, 6 cores






DIMENSIONS for Manual, Single and Three-Phase (Continued)


15

Fig. 18 Terminal DetailsFig. 17 Frame 50 - 2, 3 cores

DIMENSIONS for Manual, Single and Three-Phase (Continued)

Fig. 19 Frame 30 - 1 core Fig. 21 Frame 50 - 1 core

Fig. 20 Frame 40 - 1 core Fig. 22 Frame 60 - 1 core

DIMENSIONS for Motor operated, single and three phase

DIMENSIONSVolt-Pac Variable Autotransformer


Terminal Detail A is applicable only to 75-frame Volt-Pac transformers,

Detail B applies only to Frame-85 and 95.

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DIMENSIONS


Fig. 28 Frame 95 - 3, 4, 5, 6, 8, 9 core







MOTOR OPERATED, SINGLE AND THREE-PHASE (CONTINUED)


noisnemiDecnerefeR

sehcninisnoisnemiD

htdiW htpeD thgieHA63B63C63D63

00.6100.1200.1200.12

00.7105.7105.7105.71

05.852.7100.3200.23

E63F63G63H63

00.1200.6100.6100.61

05.7105.7105.7105.71

00.4400.3205.0305.53

J63K63L63M63N63P63

00.6100.5100.1200.1200.1200.25

05.7100.7105.7105.7105.7100.02

05.8400.3200.4300.2500.0700.25

Fig. 31 Frame 85 - 3 cores


Fig. 33 Frame 40 - 2, 3, cores


Fig. 34 Frame 85 - 6 cores

Fig. 36 Cased unit dimensions

MOTOR OPERATED, SINGLE AND THREE-PHASE (CONTINUED)

DIMENSIONS

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volt-pac variable autotransformer product features · automatic voltage regulators ... • single...

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