CAST RESIN DRY TYPE TRANSFORMERS · C. Climatic, environmental and fire behaviour classes alfanar products are designed to withstand the toughest environmental conditions and offer

CAST RESIN DRY TYPE TRANSFORMERSUP TO 4 MVA

www.alfanar.com

Contents1. General Information .......................................................................................................................................................4 A. Standard ...............................................................................................................................................................4

B. Quality ..................................................................................................................................................................4

C.Climatic,environmentalandfirebehaviourclasses .............................................................................................5

• Climaticclasses ................................................................................................................................................5

• Environmentalclasses ......................................................................................................................................5

• Firebehaviourclasses ......................................................................................................................................6

D.Coolingcodeandclassesofinsulations ...............................................................................................................6

E.Shortcircuitimpedance ........................................................................................................................................7

F. Altitude .................................................................................................................................................................7

2. Manufacturing Process .................................................................................................................................................8 Magnetic core ............................................................................................................................................................8

Windings ...................................................................................................................................................................8

• Lowvoltagewindings ...........................................................................................................................................7

• Highvoltagewindings ..........................................................................................................................................7

3. Application .....................................................................................................................................................................9

4. Product’s breakdown .....................................................................................................................................................12

5. Product’s features ..........................................................................................................................................................13

6. Technical Information ....................................................................................................................................................14 alfanarEco-designcastresintransformers .............................................................................................................14

alfanarCastResinTransformersfamilyaccordingtoKSAstandard(Aluminiumfoil) ........................................15

alfanarCastResinTransformersfamilyaccordingtoKSAstandard(Copperfoil) ..............................................16

alfanarCastResinTransformersfamilyaccordingtoInternationalStandards(Copperfoil) ................................17

alfanarCastResinTransformersfamilyaccordingtoInternationalStandards(Aluminiumfoil) .........................18

7. Accessories ....................................................................................................................................................................19 Standardaccessories ..................................................................................................................................................19

Additionalaccessories ...............................................................................................................................................20

1.Enclosures ........................................................................................................................................................20

2.HV&LVconnections ......................................................................................................................................21

3.Temperatureprotectiverelay............................................................................................................................22

4.Ventilationfans ................................................................................................................................................23

5. Surgearrestors ..................................................................................................................................................23

6.AntivibrationPadsKit .....................................................................................................................................23

8. Tests ...............................................................................................................................................................................24

RoutineTests .............................................................................................................................................................24

TypeTests .................................................................................................................................................................24

SpecialTest ...............................................................................................................................................................24

Notes ....................................................................................................................................................................................25

4

1 - General Information

A. StandardalfanarDryTypeTransformersaremanufacturedaccordingto:• IEC 60076-11 – Power transformers – Part. 11: Dry – type• IEC 60076-12 – Power transformers – Part. 12: Loading guide for dry-type power transformers• IEC 60076-1 – Power transformers – Part. 1: General• IEC 60076-2 – Power transformers – Part. 2: Temperature rise• IEC 60076-3 – Power transformers – Part. 3: Insulation levels, dielectric test and external clearances in air• IEC 60076-5 – Power transformers – Part. 5: Ability to withstand short circuit• IEC 60076-10 – Power transformers – Part. 10: Determination of sound levels• IEC 60085 – Thermal evaluations and designation• IEC 60270 – High-voltage techniques – Partial discharge measurement• IEC 60529 – Degree of protection provided by enclosures (IP code)

B. QualityalfanarElectricalSystemsiscertifiedbyrenownedinternationalevaluationcompaniesfortheirQualityManagementaccordingtoISO9001:2015.

alfanarisalsocertifiedforEnvironmentalManagementaccordingtoISO14001:2015.

C. Climatic, environmental and fire behaviour classes alfanarproductsaredesignedtowithstandthetoughestenvironmentalconditionsandofferanextremelyhighlevelofreliabilityevenunderthetoughestconditions.

According to thehighestenvironmental,climate,andfirespecifications,alfanarDryTypeTransformersaremanufacturedaccordingtointernationalstandardIEC60076-11Edition2.02018-08.

• Climatic classes

Several climatic classes are defined in IEC 60076-11suchas:

- Class C1:Thetransformerissuitableforoperationat ambienttemperaturesabove-5°Cbutmaybeexposed during transportandstorage toambient temperatures downto-25°C

- Class C2: The transformer is suitable for operation, transportandstorageatambienttemperaturesdownto -25°C

- Class C3:Thetransformerissuitablefortransportand storageat-40°Candoperationat-25°C



• Environmental classes

Environmentalconditionsfordry-typetransformersareidentifiedintermsofhumidity,condensation,pollutionandambienttemperature

- Class E0:Nocondensationoccursonthetransformers andpollutionisnegligible.Thisiscommonlyachieved inaclean,dryindoorinstallation.

- Class E1:Occasional condensationcanoccuron the transformer (for example, when the transformer is de-energized).Limitedpollutionispossible.

- Class E2:Frequentcondensationorlightpollutionor combinationofboth

- Class E3:Frequentcondensationormediumpollution orcombinationofboth

- Class E4:Frequentcondensationorheavypollutionor combinationofboth

6

• Fire behaviour classesTwofirebehaviourclassesaredefined:

- Class F0:Thereisnospecialfirerisktoconsider.Except forthecharacteristicsinherentinthedesignofthetrans former, no special measures are taken to limit flamma bility.Nevertheless,theemissionoftoxicsubstancesand opaquesmokeshallbeminimized.

- Class F1:Transformerssubjecttoafirehazard.Restricted flammabilityisrequired.Theemissionoftoxicsubstances andopaquesmokesshallbeminimised.

D. Cooling code and classes of insulation For dry type transformers there are two types of coolingmethods: • Airnatural(AN) • Airforced(AF)

The main features of insulation are to provide dielectricstrengthandtobeabletowithstandcertainthermallimits.

TheinsulationclasscouldbeForH. - 180°CforClassHinsulation - 155°CforClassFinsulation

1 - General Information

E. Short circuit impedanceTheshortcircuitimpedanceisthetransformer’simpedance,usuallybetween4%and6%fordistributiontransformersandhigher than7% forpower transformers.The short circuit impedance is thepercentageof theprimary ratedvoltagethatmustbeappliedatthetransformerprimarywindingwhenthesecondarywindingisshortedinordertohavetheratedcurrentsintheprimaryandsecondarywindings.Iftheshortcircuitimpedanceincreases,itwillresultinanunnecessaryvoltagedropacrossthepowertransformerandwilllimititsabilitytodeliverpowertothesecondary-connectedequipment.

•Transformersworkinginparallelshouldhaveidenticalshortcircuitimpedance.

F. AltitudeThe transformers are suitable for operation at altitudes of up to 1000m above sea level. Site altitudes above1000mrequiretheuseofspecialdesignsandshouldbementionedintheorder.

8

WindingsThe windings consist of current-carrying conductorswoundover thesectionsofcores.alfanar transformersaremadeofhigh-conductivitywindingsmadeofelectro-lyticcopperoraluminiumconductors.Inatransformer,therighttypeofwindingsisparticularlysignificantforspacesavingandminimizationofloadlosses.

• Low voltage windings Lowvoltagewindingsaremadeofafoilcopperoraluminium sheetandinsulatedwithmultiplelayersofinsulationmaterials. Thewindingsaremulti-layeredhelicaltype,acharacteristic thatprovidesthehighestmechanicalstabilityduringshortcircuit stress.Thegreatestadvantagesofusingafoilcopper/aluminium conductorarethe“NoEffect”ofaxialshortcircuitcompressing forcesandtoreducelossesresultingfromtheskineffect.

• High voltage windings Dependingontheratedcurrentofatransformer,thehigh voltagewindingsareeithermadeofenameledroundcopper/ aluminiumwiresorstrips.Thewindingsaremulti-layerhelical/ desktypeandtheinter-layerinsulationismadeofhighquality insulationmaterialsclassForHaspercustomerrequirements.

Magnetic coreThepurposeofthecoreistoprovidealowreluctancepathforthemagneticfluxlinkingprimaryandsecondarywindings.Themagneticcircuitinatransformerismadeofsteellaminationsheetswhosebasiccomponentsareironandapproximately 3%siliconasanalloyelement.

alfanar useshigh-quality,low-hysteresisCold-RolledGrain-OrientedSteelSheet(CRGO)transformerlaminationscomplyingwiththeIEC60404-8-7standard.Bothsidesofthelaminationhaveathininorganic,oil-resistantandrustproofinsulationcoatingofatleast100Ω.mm2insulationresistivity.

Asmostofthelossesintransformercoresarisefromtheyoke-limbjoints,alfanar transformershavetheendsoftheyokesandlimbsmiteredandstackedtogetherbyasimpleoverlappingarrangement(step-lappedjoints).Thisarrangementallowsforthegradualandsmoothtransferoffluxthroughthejointsultimatelyloweringthecornerlosses.Theadvantagesforusingthestep-lappedtechnologyarethereductioninno-loadcurrent,no-loadlossesandsoundlevel.

Forprecisecorecuttingandstep-lapcorecuttingalfanarusessophisticatedLAE’smodelTE40andTE60corecuttingmachines,respectively.Duringthetiltingandunloadingphaseofproduction,ourhighly-skilledoperatorspreciselyandfirmlyassemblethecoresusingspecialassemblybenchesbyperfectlyaligningthecorestotherightpositioningreferences.

2 - Manufacturing Process

ApplicationalfanarDrytransformersarewidelyusedinthefollowingapplications:

A. High rise buildings

B. Hospitals

3 - Applications

10

C. Hotels

D. Underground

3 - Applications

E. Factories

F. Shopping center

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4 - Product Breakdown

1

4

6

14

2

1 113 3 5

8

8

9

12

10

7

11

1 1 1 5

4

10

6

14

7

39

10

9

4

3

13

1

2

1411

8 8

ID Number DESCRIPTION

1 Lowvoltageterminals

2 Low voltage neutral terminal

3 Liftingeyeboltlugs

4 Highvoltageterminals

5 Ratingplate

6 Offloadde-energizedtapchanger

7 Earthlingterminal

8 Dualdirectionscrollswheels

9 PT100connectionterminalbox

10 Pullingholeatbottomside

11 Highvoltagecastcoilwinding

12 Low voltage winding

13 Low voltage winding terminal supports

14 Highvoltagedeltaconnectionpipes

alfanar offersanoptimizeddesignforfullrangeofCastReinTransformersmadeinKSA.

SmartinterfaceforLVandHVconnectionterminals.

Magneticcoremanufacturedwithhighperformancegrain-orientedsteel.

Lowvoltagewindingmadebyfoilconductor(AlorCu)fullinsulatedwithpre-impregnatedinsulationmaterial(Pre-preg).

Highvoltagewindingmadewithaseriesoftapeconductor(AlorCu)sectionsvacuumcastprocessedbyepoxyresinproperlyfilledtoobtain:extensivemaintenance-free,moistureproofforanyenvironment,pollutionresistant,fireresistantandself-extinguishing.

HighvoltagedeltaconnectiontubeswithHVterminalsatitsterminations.

Liftingeyeslugsmadebystandardcertifiedandapprovedcomponents.

Basementprofilesequippedwithby-directionalconvertiblescrollingwheels.

Pullingholeonbasementprofilesforaneasymovementtoreachoperationsite.

Clampingandbeltingholeontopcoreprofilesensuretheeasyandsafetransporttotheinstallationsiteonatruckdeck.

Highvoltagetappingselectorfor±2x2,5%(otherrangeavailableatrequest)easilyoperableatde-energizedcondition,locatedonHVterminalsidetoadapttheprimaryvoltagetothenetworkvalueACconnectionpoint.

TemperaturemonitoringsensorsPT100(otheralternativeavailableuponrequest)locatedoneachLVwindingtopsideinstrictcontactwithhotspotwindingpart.

SteelpartsarepaintedwithahightemperaturecoatingRAL5012,(othercolorsandgalvanizedcoatingareavailableuponrequest),makethemsuitableforhighlyaggressiveenvironments.

Smartmechanicalstructuremadewithsimpleboltassembledparts,foraneasyinterfacewithalonglistofavailableaccessories.

5 - Product features

14

European ECODESIGN According to EN 50588-1

Rating Pcc (W) Vcc% P0 (W) Lp(A) Weight (kg) Dim. IP 00 LxDxH

100 kVA 2050 W 6% 280 W 51 dB 750 kg 1240 x 600 x 1000

160 kVA 2900 W 6% 400 W 54 dB 850 kg 1260 x 600 x 1100

250 kVA 3800 W 6% 520 W 57 dB 1200 kg 1350 x 600 x 1150

400 kVA 5500 W 6% 750 W 60 dB 1400 kg 1400 x 750 x 1300

500 kVA 6400 W 6% 900 W 61 dB 1550 kg 1450 x 750 x 1350

630 kVA 7600 W 6% 1100 W 62 dB 1850 kg 1500 x 750 x 1500

800 kVA 8000 W 6% 1300 W 64 dB 2200 kg 1600 x 800 x 1550

1000 kVA 9000 W 6% 1550 W 65 dB 2550 kg 1650 x 800 x 1600

1250 kVA 11000 W 6% 1800 W 67 dB 3050 kg 1700 x 1000 x 1700

1600 kVA 13000 W 6% 2200 W 68 dB 3600 kg 1750 x 1000 x 2200

2000 kVA 16000 W 6% 2600 W 69 dB 4800 kg 1850 x 1310 x 2250

2500 kVA 19000 W 6% 3100 W 70 dB 5400 kg 1950 x 1310 x 2300

3150 kVA 22000 W 6% 3800 W 72 dB 6800 kg 2100 x1310 x 2380

6 - Technical Information

alfanar Eco-design Cast Resin Transformers

Alltheabovecastresintransformersfulfillthefollowingcommontechnicaldata:

NOTE: Power ratings higher than 3150 kVA, and or different voltage ratio, or impedance value, as well as particular design for special dedicate application will be available under request and submission of technical specification.

Distance measures in : Millimetres

Voltage ratio : 11±2x2,5% / 0,4kV or 10±2x2,5% / 0,4kV;

Insulation levels Primary / Secondary : 12 - 28 - 75 / 1,1 - 3kV

Partial discharge level : < 10 pC

Insulation thermal class : F / F - 100 / 100 K

Vector group : Dyn11

Frequency : 50 Hz

Available environmental classes : E2 / E3

Available climatic classes : C1 / C2

Fire classification: F1

Conductor material: Aluminium foil

H

D

L

Pn(kVA)

Po (W) Io % Pcc120°

(W) Vcc% LpA (dB)

Weight (kg)

Length x Depth x Height

Wheel dist.

100 460 2,2 2200 6 49 560 1110x600x1150 520

160 650 1,8 2900 6 51 800 1220x600x1200 520

200 720 1,7 3500 6 52 880 1250x600x1250 520

250 850 1,6 3800 6 53 1000 1300x600x1280 520

315 1000 1,4 4500 6 54 1100 1320x750x1350 670

400 1150 1,2 5500 6 55 1350 1340x750x1450 670

500 1350 1,0 6400 6 56 1500 1420x750x1480 670

630 1600 0,9 7400 6 57 1700 1450x850x1580 670

750 1800 0,8 8200 6 59 1950 1480x850x1680 670

800 1900 0,8 8800 6 60 2100 1500x850x1700 670

1000 2300 0,7 10000 6 61 2450 1540x1000x1870 820

1250 2600 0,6 12000 6 63 2900 1600x1000x2050 820

1500 3000 0,6 14500 6 64 3400 1720x1000x2100 820

1600 3100 0,6 15500 6 65 3500 1720x1000x2180 820

2000 4000 0,5 16000 6 67 4200 1800x1300x2300 1070

2500 4700 0,4 18000 6 68 4900 2000x1300x2280 1070

3150 5500 0,3 23500 8 69 5850 2150x1300x2340 1070

alfanar Cast Resin Transformers family according to KSA standard (Aluminium foil)




Voltage ratio : 13,8±2x2,5% / 0,4kV;

Insulation levelsPrimary / Secondary : 17,5 - 38 - 95 / 1,1 - 3kV




Frequency : 60 Hz



Fire classification : F1

Conductor material : Aluminium foil

H

D

L

16

Pn(kVA)


(W) Vcc% LpA (dB)

Weight (kg)


Wheel dist.

100 440 2,2 2200 4 49 560 960x650x1150 520

160 580 1,8 2600 4 50 800 1060x650x1150 520

200 720 1,7 3000 5 52 900 1200x650x1220 520

250 850 1,6 3400 5 53 1100 1240x650x1250 520

315 980 1,4 4100 6 54 1200 1260x750x1260 670

400 1150 1,2 5400 6 55 1350 1400x750x1520 670

500 1350 1,0 6700 6 56 1550 1500x750x1580 670

630 1650 0,9 7800 6 57 1700 1500x850x1680 670

750 1800 0,8 7500 6 59 2200 1460x850x1540 670

800 1900 0,8 7800 6 60 2350 1470x850x1550 670

1000 2300 0,7 9600 6 61 2750 1530x1000x1740 820

1250 2600 0,6 11000 6 63 3000 1580x1000x1870 820

1500 3100 0,6 14900 6 64 3750 1650x1000x1940 820

1600 3300 0,6 15200 6 65 3850 1660x1000x1950 820

2000 4000 0,5 16000 6 67 4800 1830x1300x2050 1070

2500 4800 0,4 21000 6 68 5750 1860x1300x2260 1070

3150 5400 0,3 25000 8 69 6800 1980x1300x2280 1070


alfanar Cast Resin Transformers family according to KSA standard (Copper foil)









Frequency : 60 Hz


Available climatic classes : C1


Conductor material : Copper foil

H

D

L

Pn(kVA)


(W) Vcc% LpA (dB)

Weight (kg)


Wheel dist.

100 400 2,2 2100 4 48 490 960x600x1150 520

160 520 1,8 2650 6 49 680 1140x600x1240 520

200 610 1,7 2950 6 50 800 1140x600x1320 520

250 700 1,6 3650 6 52 900 1200x600x1340 520

315 800 1,5 4250 6 54 1020 1200x750x1440 670

400 980 1,2 5000 6 55 1250 1290x750x1510 670

500 1100 1,1 6000 6 56 1400 1320x750x1580 670

630 1390 0,9 7100 6 57 1700 1410x850x1680 670

750 1550 0,8 7800 6 58 1800 1440x850x1700 670

800 1650 0,8 8500 6 58 1900 1440x850x1800 670

1000 1900 0,7 10000 6 61 2400 1530x1000x1870 820

1250 2300 0,6 11600 6 63 2700 1530x1000x2070 820

1500 2500 0,6 13500 6 64 3100 1620x1000x2090 820

1600 2700 0,6 14000 6 65 3300 1650x1000x2200 820

2000 3400 0,5 17000 6 67 4000 1800x1300x2230 1070

2500 4000 0,4 20000 6 68 4800 2000x1300x2250 1070

3150 4600 0,3 25100 8 69 5800 2100x1300x2270 1070

alfanar Cast Resin Transformers family according to International Standards (Copper foil)




Voltage ratio : 11±2x2,5% / 0,4kV or 10±2x2,5% / 0,4kV;

Insulation levelsPrimary / Secondary : 12 - 35 - 75 / 1,1 - 3kV




Frequency : 50 Hz




Conductor material : Copper foil

H

D

L

18

Pn(kVA)


(W) Vcc% LpA (dB)

Weight (kg)


Wheel dist.

315 1400 1,6 4600 6 61 1750 1650x750x1650 670

400 1650 1,4 5400 6 62 1900 1700x750x1700 670

500 1900 1,0 6200 6 63 2100 1750x750x1720 670

630 2200 0,9 8000 6 64 2450 1850x850x1780 670

750 2600 0,8 9400 6 65 2700 1840x850x1860 670

800 2700 0,8 9600 6 65 2750 1860x850x1890 670

1000 2900 0,7 11000 6 66 3250 1920x1000x2040 820

1250 3200 0,6 13000 6 67 3700 1950x1000x2230 820

1500 3600 0,6 14500 6 67 4000 1950x1000x2250 820

1600 3800 0,6 15000 6 68 4200 1980x1000x2350 820

2000 4500 0,5 17500 6 69 5000 2070x1300x2390 1070

2500 5800 0,4 19500 6 70 6300 2260x1300x2450 1070

3150 6600 0,3 25000 8 72 8000 2300x1300x2450 1070


alfanar Cast Resin Transformers family according to International Standards (Aluminium foil)

AlltheaboveCastresinTransformersfulfillingfollowingcommontechnicaldata:








Frequency : 60 Hz


Available climatic classes : C1


Conductor material : Aluminium foil

H

D

L

ForeachoneoftheCRTsizesincludedinthiscatalogue,thefollowinglistofaccessoriesareavailable:

StandardaccessoriesincludedinalltheCastResinTransformers:

Standard accessories

4 x Lifting Eyes 3+1 x LV Terminals

4 x Scrolling Wheels 4 x Pulling Holes

1 x Rating Plate 4 x Truck Belting Holes

7 - Accessories

3 x PT100 connection box:PT100linearresistanceareusedassensorsformonitoringandcontrollingtemperatureofthetransformers.Thissystemcanperformtemperaturesetting,highesttemperaturerecording,signalforalarmandtrip,andstartthefanonandoffautomaticallyormanually.

2 x Grounding Terminal

3 x HV Terminals

3 x Off load HV TappingSelector

20

7 - Accessories

Additional accessories

1. Enclosures

Availableaccessoriesforallcastresintransformersmodels:

TherearedifferentsizesofprotectiveenclosuresthatcancoveralltheCRTratingrange,suitableforinsideinstallationwiththeavailableprotectivedegreeIP21,IP23,IP31andIP33.TheenclosuresguaranteeenoughnaturalventilationforCRTnaturalcooling,andprotecttheCRTfromdirectsunlightinoutdoorapplications.

Note:Specialenclosuresforparticularapplicationwillbeofferedaccordingtocustomer’srequirementsanditcanbeequippedwithextractionfans,filters,specialprotection,etc…

kVA Lenght(mm)

Deep(mm)

Height(mm)

Weightkg

1001600 900 1510 250160

200250

1700 950 1710 260315400500

1950 1050 1910 300630750

10002050 1100 2210 330

12501500

2300 2510 38020002500

2500 1310 2710 4003150

*ThisisApproximateddimensions

Enclosures Dimensions

H

L D

2. HV & LV Connections

Standared Connection:

LV Connection

HV Connection

Special connection:

LVextensionbusbar HVterminalbushing

Note:Cableboxmaybeusedalso.

DirectCableConnection

DirectCableConnection

22

3. Temperature Protection and Control RelayThescopeofthisrelayistomeasuretheLVwindinghotspottemperaturethroughtotheinstalledPT100oneachLVphase.

Anoption,ifrequiredoralreadyinstalled,therelaywillalsomeasurethetopyokecoretemperaturewithseparatealarmandtripsetpointforthisfourthsensor.

7 - Accessories

Theventilationfansprotectionandcontrolkitsupplies,protects,andcontrolstheforcedairventilationkitincombinationwiththetemperaturemonitoringrelay.

4. Ventilation FansTheventilationfanskitiscomprisedoftwoventilationbarswhereeachonehas three radialventilatorswithadjustablepositionandadjustablesupportingstirrupabletobedirectlyconnected on thealfanar CRT predisposition. There is adifferentrateoffankitavailablethatisabletoconferwiththecastresintransformerwithanoverloadcapabilityof25to40%,accordingtocustomerrequirements.

CRTinAFshallbeoperatedonlyforlimitedtimeandgener-allyincaseofemergency.

CRTonloadlossesinAFincreasingof:

• 156%whenoperatedat125%overload • 169%whenoperatedat130%overload • 200%whenoperatedat140%overload

6. Antivibration Pads Kit

5. Surge Arrestors KitThesurgearrestorskitiscomprisedofthreesurgearrestorsselectedaccordingtotheCRTinsulationleveltobedirectlyconnectedonthealfanarCRTterminalpredisposition.

TheantivibrationpadskitiscomprisedoffourrubberdumpersselectedaccordingtotheCRTsizeandlocatedbelowtothealfanarCRTscrollwheels.

24

8 - Tests

alfanar CRT had been tested according to the latest IEC standards

Type Tests1 - Temperature rise testaccordingtoIEC60076-11,andIEC60076-22 - Lightning impulse testaccordingtoIEC60076-11,andIEC60076-3

Special Tests1 - Measurement of sound levelaccordingtoIEC60076-11,andIEC60076-102 - Short-circuit testaccordingtoIEC60076-11,andIEC60076-53 - Environmental testaccordingtoIEC60076-11,forE2,andIEC60076-164 - Climatic testaccordingtoIEC60076-115 - Fire behaviour testaccordingtoIEC60076-116 - Measurement of zero-sequence impedanceaccordingtoIEC60076-1

Routine tests 1 - Measurement of winding resistanceaccordingtoIEC60076-1 2 - Measurement of voltage ratio and check of phase displacementaccordingtoIEC60076-1 3 - Measurement of short circuit impedance and load lossesaccordingtoIEC60076-1 4 - Measurement of no load-loss and currentaccordingtoIEC60076-1 5 - Separate-source AC withstand testaccordingtoIEC60076-3 6 - Induced AC withstand voltage testaccordingtoIEC60076-3 7 - Partial discharges measurementaccordingtoIEC60076-11,IEC60270andAnnexAofIEC 8 - Measurement of insulation resistanceaccordingtoIEC60076-1

Notes

26

Notes

MKT_115719_Dry transformer _July19_01For catalogue soft copy scan QR code

www.alfanar.com

Documents

CAST RESIN DRY TYPE TRANSFORMERS · C. Climatic, environmental and fire behaviour classes alfanar products are designed to withstand the toughest environmental conditions and offer