Ningbo Hyuan Power Industry Co., Ltd.  

Product Name: 22.9kv 60Hz/50Hz Zigzag Transformer with Netural Grounding Resistor Model NO.: ZIGZAG Usage: Single-phase Transformer, Rectifier Transformer, Combined Transformer, Power Transformer, Distribution Transformer Certification: ISO9001-2000, ISO9001 Winding Type: Two-winding Transformer Cooling Method: Oil-immersed Type Transformer Core: Core-type Transformer Phase: Three Application: Power, Instrument, Rectifier Trademark: HEMG Transport Package: Carton with Wooden Specification: 15KV/27KV/38KV, 50HZ/60HZ, Origin: China Product Description TECHNICAL CHARACTERISTICS.TABLE OF TECHNICAL DATA TRANSFORMER ZIG ZAG 22.9 KV - SET NUEVA CAJAMARCA.ÍTEMCHARACTERISTICSUNITYREQUIRED VALUE OFFERED VALUE1GeneralCountrySpecify ChinaManufacturerSpecifyHEMGManufacturing standardsIEC 60076-6 Acapite 10IEC 60296IEC 60076-6 Acapite 10IEC 60296TypeSubmerged in oil or other superior insulation. Submerged in oil Main Nominal VoltagekV22.922.9Short-term neutral currentA300300Duration of neutral current of short durationS1010FrequencyHz6060Permanent neutral currentA1010Short time current to ground for 60 secKA2525Conservation systemAirtight with gas mattressAirtight with gas mattressConnectionZigzagZigzagType of liquidNatural Estermineral oilInsulation system120° C (TUP Thermally enhanced paper)TUP120° C (TUP Thermally enhanced paper)TUPCooling ModeONANONAN2Conditions of serviceAltitudemsnm<1000<1000Air temperature°C28°C anytime28°C anytime25°C Monthly average of the warmest month25°C Monthly average of the warmest month20°C Annual average20°C Annual average5°C minimum5°C minimumDegree of pollutionmm/kV2525Seismic disturbancegSpecify0.23Temperature limitsThermal class°C105105Heating of the upper liquid°C6060Average warming of windings°C6565Warmest spot heating°C78784Insulation level insideHigher Material Voltage kV2424Primary impulse voltagekVpico505033Applied voltagekV1251255External Insulation LevelHigher Material Voltage kV3636Primary impulse voltagekVpico170170Applied voltagekV70706Guaranteed ParametersLost in vacuum W500500Excitation current%0.30.3Homopolar impedance/fase45457Weights and dimensionsDielectric liquid weightkgSpecify550Total weightkgSpecify1700Length x Width x HeightmmAccording to design1600x950x13008Classification of atmosphere and coatingClass (NBR 11388)Class IIClass IIsystemEpoxiEpoxi9AccessoriesOil level indicator without contacts1 PzYesYesContactless overpressure valve1 PzYesYesDrain valve1 PzYesYesContactless bimetallic thermometer1 PzYesYesEarthing bar (5x30mm)1 PzYesYesSudden pressure relay with a contact1 PzYesYesGrounding Terminals1 PzYesYes10Testing IECIEC11Neutral ResistanceInsulationAirAirServiceExteriorExteriorNominal Voltage kV22.9/√322.9/√3Intensity of continuous serviceA1010Short-term IntensityA300-10 s300-10 sResistanceohm1212metal enclosureAISI-304 stainless steel painted interior and exteriorAISI-304 stainless steel painted interior and exteriorDegree of protectionIPIP23IP23Resistive materialChrome-nickel steel AISI-304 Cr18/20%, Ni 18/10%;Fe resto304 Chrome-nickel steel AISI-304 Cr18/20%, Ni 18/10%;Fe restonormativeIEEE Std- 32IEEE Std- 32Construction Stainless steel stamped grills AISI‐304 (Fe‐Cr18‐Ni10), Joined by welding points and insulated from each other by ceramic separators. Stainless steel screws304,,.Stainless steel stamped grills AISI‐304 (Fe‐Cr18‐Ni10), Joined by welding points and insulated from each other by ceramic separators. Stainless steel screwsApplicationNeutral Residence Zig Zag ZNeutral Residence Zig ZagEquipped with current transformerToroidal current transformer 300/1A, 1.5 VAToroidal current transformer 300/1A, 1.5 VA12Protection SystemRemovable switchkV24 kV24 kVMonitoring relay and fault detection with 50/51 and 50N / 51N functionGLBSpecifysatisfyMonitoring relay neutral resistance and resistance sensor..kVSpecifysatisfyTABLE OF TECHNICAL DATA TRANSFORMER ZIG ZAG 20KV - SET RIOJA.ÍTEMCHARACTERISTICSUNITYREQUIRED VALUEOFFERED VALUE1GeneralCountrySpecifyChinaManufacturerSpecifyHEMGManufacturing standardsIEC 60076-6 Acápite 10IEC 60296IEC 60076-6 Acápite 10IEC 60296TypeSubmerged in oil or other superior insulation.Submerged in oil Primary Nominal VoltagekV2020Short-term neutral currentA300300Duration of the neutral current of short durationS1010FrequencyHz6060Permanent neutral currentA1010Short time current ground for 60 sec 60KA2525Conservation systemAirtight with gas mattressAirtight with gas mattressConnectionZigzagZigzagType of liquidNatural Estermineral oilInsulation system120° C (TUP Thermally enhanced paper)120° C (TUP Thermally enhanced paper)Cooling ModeONANONAN2Conditions of serviceAltitudemsnm< 1000< 1000Air temperature°C28°C anytime28°C anytime25°C Monthly average of the warmest month25°C Monthly average of the warmest month20°C Annual average20°C Annual average5°C minimum5°C minimumDegree of pollutionmm/kV2525Seismic disturbancegSpecified 0.23Temperature limitsThermal class°C105105Heating of the upper liquid°C6060Average warming of windings°C6565Warmest spot heating°C7878354Insulation level insideHigher material VoltagekV2424Primary impulse voltagekVpico5050Applied voltagekV1251255External Insulation LevelHigher material VoltagekV3636Primary impulse voltagekVpico170170Applied voltagekV70706Guaranteed ParametersLost in vacuumW500500Excitation current%0.30.3Homopolar impedance/fase40407Weights and dimensionsDielectric liquid weightkgSpecify 500Total weightkg Specify 1600Length x Width x Height **mmAccording to design1600x900x13008Classification of atmosphere and coatingClass(NBR 11388)Class IIClass IISystemEpoxiEpoxiSurface PreparationSa 2 1/2Sa 2 1/29Accessories sOil level indicator without contacts1 PzYes Yes Contactless overpressure valve1 PzYesYesDrain valve1 PzYesYesContactless bimetallic thermometer1 PzYesYesEarthing bar1 PzYesYesSudden pressure relay with a contact1 PzYesYesGrounding Terminals1 PzYesYes10TESTING IECIEC11Neutral ResistanceInsulationAirAirServiceExteriorExteriorNominal Voltage kV20/ √ 320/ √ 3Intensity of continuous serviceA1010Short-term currentA300-10 s300-10 sResistanceohm1212metal enclosureStainless steel AISI- 304 Painted inside and out 304Stainless steel AISI- 304 Painted inside and outDegree of protectionIPIP23IP23Resistive materialChrome-nickel steel AISI-304 Cr18/20%, Ni 18/10%;Fe resto304Chrome-nickel steel AISI-304 Cr18/20%, Ni 18/10%;Fe restonormativeIEEE Std- 32IEEE Std- 32ConstructionStainless steel stamped grills AISI‐304 (Fe‐Cr18‐Ni10), Joined by welding points and insulated from each other by ceramic separators. Stainless steel screwsAISI‐304(Fe‐Cr18 Ni10),,.Stainless steel stamped grills AISI‐304 (Fe‐Cr18‐Ni10), Joined by welding points and insulated from each other by ceramic separators. Stainless steel screws6ApplicationNeutral Resistance Zig Zag ZNeutral Resistance Zig Zag ZEquipped with current transformerToroidal current transformer 300/1A, 1.5 VAToroidal current transformer 300/1A, 1.5 VA12Protection SystemRemovable switchkV24 kV24 kVMonitoring relay and fault detection with 50/51 and 50N / 51N functionGLBSpecifysatisfyNeutral resistance monitoring relay and resistance sensor.kVSpecify satisfyNote:1.- They must include all the complete equipment (including a Cell) to implement the artificial Neutral in 20 kV and 22.9 kV Bars of the Rioja and Nueva Cajamarca substations, respectively, to guarantee the operation of ground fault protection in networks.2. - Includes the minimum necessary accessories for the commissioning and operation of the Transformer and equipment associated with the artificial Neutral.