1 Contents:PageVOLTAGE regulators - Introduction: Features - Construction - General Types Available: Terminology ..5- Single-phase variable autotransformers ..6-7- Three-phase variable autotransformers ..8-9- Dimensions and weights (Single-phase regulators ) ..10- Dimensions and weights (Three-phase regulators ) ..11- voltage regulators X series ..12-13-14- Motor driven Remote voltage program board 0-10 ..16- Dimensions and weights (Motor driven autotransformers)..17- voltage regulators for higher power Metered variable autotransformers, isolated voltage regulators - circuits ..20-21leader in voltage regulatorssince 194620135 MILANO - ITALY - TRENTO, 6 - PHONE 39 (2) 58306849-58306732-58308956 - FAX 39 (2) 58304722 - E-mail: Regulators3 The Belotti autotransformer is an efficient, trouble-free devicefor controlling most transformers, our voltage regulator has a transforma-tion ratio that can be smoothly and continuosly changed so theoutput of the unit can be controlled from zero to line voltage oreven.
2 EFFICIENT - transforms power more efficiently than rheostatsDURABLE -because it runs cool (40/50 C max)OVERLOAD-ABLE withstands 1000% overloads short term- Independent of load size or power factor - voltage tothe load changes little from full load to 1- Produce an adjustable output voltage that is a sine the voltage magnitude is changed; the shape of the vol-tage is not Handle all load power Can be used to adjust banks of capacitors and/or :- Regulate voltage (over and under- voltage testing of electricaland electronic equipments).- Speed control- Lighting control in theatres, hotels, photographic studios- Motor test stands- Power supplies- Industrial process heating control- Source voltage & load banks for electrical testing: circuit breaker uninterruptible power supplies generators- Control of voltage and current through rectifiers- Control of rectifiers in electroplating Supply voltage adjustment (automatic voltage stabilisers)Fig.
3 2- Easy to control with simple raise-lower switches orstandard process controllers. Motor drive controlprovides complete isolation between power and con-trol circuits and Belotti units are immune to powerline Do not produce Reduce utility Avoid interference withother :Manufacturing standardsDesigned and tested according to VDE-0552 andIEC 61558-2-14; designed as toroidal regulators use grain-oriented strip wound siliconsteel cores ensuring low losses and reduce magne-tizing winding, wich is insulated from the core byprecision moulded winding formers, comprises asingle layer (class H wire) carefully wound to provi-de a flat surface for the replaceable carbon brush units are used, theresistance of the brush being carefully calculatedto limit the current circulating in the bridged is therefore most important that only the correctreplacement brush is used in any particularBelotti s.
4 Brushes are mounted in robust brush car-riers insulated from the shaft, and designed so thatmetal parts cannot come into contact with the win-ding in the event of brush wound core and brushgear are mounted on arugged cast aluminium frame providing strenghtcombined with minimum weight. The bases incor-porated mounting holes providing interchangeablefixing centres with many other variable specifications and terminologyFig. 3 - Short-time overload curveFig. 4 - For ambient temperatures above 45 C, rated current shouldbe reduced according to this curve The data given in the table on pag. 6-7 should beread in conjunction with the following general voltage :the supply voltage to which the variable transfor-mer is voltage :the range of voltage available at the output :all units in this catalog operate in the range of 50 to400 Rating:the maximum output current at maximum outputline voltage multiplied by that max voltage and divi-ded by 1000 for single-phase.
5 Divide by 577 forthree-phase (1000/V3).Line- voltage and over- voltage connection:with line- voltage connections, the supply is con-nected across the whole winding, and the maxi-mum output equals the applied over- voltage connection, the supply is applied toa tapping provided instead of to the whole winding,giving : 0-280 Volt from a 220 Volt :all Belotti variable transformers are flash-tested at2,5 KV. rms 50 Available: TerminologyFrame SizesBELOTTI variable autotransformers are made inseven basic series or frame size V1 - V3 - V5 - V10- V20 - V40 - V70 Electrical specifications are given in the detailedtabulations for the various models on pag. 6-7 features can be and three phase Single phase - Suffix V (ex V5)Three phase - Suffix T (ex T5)Uncovered modelsAll basic variable transformers are available inuncovered units are designed with the suffix: NA (ex V5 NASingle phase uncovered, T5 NA Three phase unco-vered).
6 Covered modelsAll single units and ganged assemblies are availa-ble in acratively styled enclosureSuffix: NC (ex V 5 NC single phase covered).Portable modelsV1 - V3 - V5 - V10 - V20 series can be supplied inportable cases with carrying handles, input lead,switch, output digital voltmeter LED (suffix PV) can be portable models are also available with volt-meter and ammeter (suffix PVA)Output receptaclesIn the models covered and portable the output canbe taken through:a) socket type schuko (up to 10 A) suffix SCHb) CEE socket 16-32-64 A suffix CES16, CES32,CES64c) insulated terminals suffix ILTM otor Drive (pag. 15)All open and covered voltage regulators are availa-ble with reversing motor drive for remote controland automatic : M (ex V 5 NA/M is a motor-drive singlephase open construction-uncovered)Ganged assembliesAll voltage regulators are available assemblies oftwo, three, four, five, six units operating on onecommon shaft for parallel (See pag.
7 18) or number following the suffix NA or NC indicatedthe number of ganged regulators (add SR for seriesconnection)Exemple: V 70 NA/6-M is a single phase uncoveredmotor-drive regulator with six units in 70 NA/2SR-M two units series featuresNon standard voltage or non standard current, limitswitches, special shaft and special motors can besupplied to customer s special Current:output current that can be drawn at any brush set-ting for a continous Operation:the current rating may be multiplied by the squareroot of the Duty Cycle Ratio, this being defined asthe off-plus-on-time divided by on-time. The resul-ting up-rated current must be compared with theshort-time overload current (see Fig. 3), the lowerof the two figures being the maximum Temperature:current ratings apply up to 45 C ambient.
8 Fig. 4,must be applied for more elevated ,760014021446144224982200-22049001408148 0144824982200-220919801408/S1480/S1448/S 24982200-240512001416/S1417/S1418/S24982 200-2605130014091481144924982200-2804110 014101482145024982300-230920001419/E1420 /E1423/E24982300-260513001426/E1427/E143 3/E24982300-280411001435/E1436/E1437/E24 982500-2507175014901491149224983800-3802 ,8110014141486148424981250-1255,67006016 076413861250-1601,83006026136422982200-2 202,25006086276482982200-2204900608/S627 /S648/S2982200-24037206376386392982200-2 602,56506096476492982200-280256061066765 02982300-2303,6830640/E643/E646/E2982300 -2603780653/E655/E656/E2982300-280256065 7/E658/E659/E2982500-2503,58756606616622 983800-3801,25006706716722981250-1252,43 003613703812981250-1451,4200362376382298 2200-2200,92003683873882982200-220244036 8/S387/S388/S2982200-2401,53503693773892 982200-26012603153163172982300-230245035 7/E358/E3592982300-2501,5380369/E377/E38 9/E2982300-2601260315/E316/E317/E2986 Single phase voltage regulatorsFig.
9 5 -Uncovered ModelFig. 6 -Covered ModelFig. 7 -Portable Model with optionaldigital volt meterTYPE V - V 3NA(fig. 5)COVEREDMODELTYPE V 3NC(fig. 6)PORTABLEMODELTYPE V 3NP(fig. 7)REPLACECARBONBRUSHESTYPE V - V 5NA(fig. 5)COVEREDMODELTYPE V 5NC(fig. 6)PORTABLEMODELTYPE V 5NP(fig. 7)REPLACECARBONBRUSHESTYPE V - V 10NA(fig. 5)COVEREDMODELTYPE V 10NC(fig. 6)PORTABLEMODELTYPE V 10NP(fig. 7)REPLACECARBONBRUSHES1250-125445,574237 42825961250-1603767424742925962200-22032 77408744825992200-2203687408/S7448/S2599 2200-2402567434743925992200-260236749174 9525992200-280236,57492749625992300-2303 27,47440/E7441/E25992300-2602367442/E744 3/E25992300-280236,57446/E7447/E25993800 -3801877413745425991250-1253244061406225 831250-160223,54403442325832200-22018444 08444825832200-220255,54408/S4408/S25832 200-24014,53,54030403925712200-26013,53, 54407442725712200-28012,53,5441344302571 2300-230204,64042/E4044/E25832300-230255 ,74043/E4045/E25832300-26013,53,54046/E4 047/E25712300-28012,53,54048/E4049/E2571 3800-38093,54414445425711250-125192,4260 12690-25831250-16012,5226132691282525832 200-220102,226082694264825712200-220153, 32608/S2694/S2648/S25832200-2407,51.
10 826192620262325712200-240102,42619/S2620 /S2623/S25712200-26071,82687269528272571 2200-2806,51,826882696282825712300-23014 3,22626/E2627/E2633/E25712300-260102,626 40/E2643/E2646/E25712300-2807,52,12647/E 2653/E2655/E25712500-250133,226062639264 925833800-3805,222614269926542571 Single phase voltage regulators7 Fig. 8 -Type V 40NA and V 70NA variableautotransformers (uncovered)TYPE V - V 20NA(fig. 5)COVEREDMODELTYPE V 20NC(fig. 6)PORTABLEMODELTYPE V 20NP(fig. 7)REPLACECARBONBRUSHESFig. 9 -Single-phase connection input voltage = output voltageTYPE V - V 40NA(fig. 8)COVEREDMODELTYPE V 40NC(fig. 10)REPLACECARBONBRUSHESTYPE V - V 70NA(fig. 8)COVEREDMODELTYPE V 70NC( )REPLACECARBONBRUSHESFig. 10 -Type V 40NC and V 70NC variableautotransformers (covered)Fig.