"name": "MAIN FEATURES OUTDOOR,OIL COOLED, 3 PHASE,50HZ", "description": "", Burr /sharp edges to the winding conductor. "description": "LIFTING LUGS. "@type": "ImageObject", ROUTINE TESTS ( TO BE CARRIED OUT ON EACH JOB) 1.Measurement of winding resistance. { INSULATION TESTER OR MEGGER IS USED. Lightening Impulse test. "width": "800" "width": "800" glass pot. { "width": "800" Equipment used : High Voltage tester ( 100KV & 3KV) Faulty Termination (Improper sized lugs etc) Power Theft. "name": "FAILURES & CAUSES Faulty design Poor Workmanship", "description": "OIL : Oil level checking. "name": "ROUTINE TESTS 6.Measurement of NO LOAD LOSS & current.

Breather. "width": "800" If you wish to download it, please recommend it to your friends in any social system. "description": "", "@type": "ImageObject", "@context": "http://schema.org", transformer nirob dhilon "name": "", "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_26.jpg", The record of current wave form is noted. "description": "1. Equipment used : Wattmeters or power analyser. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/5/MAIN+FEATURES+OUTDOOR%2COIL+COOLED%2C+3+PHASE%2C50HZ.jpg", After failure , transformer is removed and replaced with new\/repaired one without removing the cause of failure which results in immediate or short time failure. INSULATION TESTER OR MEGGER IS USED. ", Measurement of harmonics of the no load current. ", Oil BDV & acidity checking at regular intervals. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/47/FAILURES+%26+CAUSES+Bad+Quality+of+raw+material..jpg", "name": "", "description": "PRIMARY IS DELTA CONNECTED AND SECONDARY IS STAR CONNECTED. "@context": "http://schema.org", Hence preventive maintenance is always cost effective and time saving. transformer prodip manufacturing PRASHANT P. NANKAR. "description": "", "@context": "http://schema.org", "name": "PARTS OF TRANSFORMER MAIN TANK RADIATORS CONSERVATOR EXPLOSION VENT", ", The testing plant parameters are such adjusted to give the rated short circuit current. "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_14.jpg", Submitted by: Name:Rajendra Kumar Choudhury Branch:Electrical Engg. Unbalanced loading. "description": "This test measures the power consumed by the transformer when the 433V winding is short circuited and The rated current is passed through the 11KV winding. "name": "", "name": "", Measurement of zero Phase sequence Impedance test. Equipment used : voltmeter.

MAIN FEATURES OUTDOOR,OIL COOLED, 3 PHASE,50HZPRIMARY IS DELTA CONNECTED AND SECONDARY IS STAR CONNECTED. (EFFICIENCY & REGULATION) This test measures the power consumed by the transformer when the 433V winding is short circuited and The rated current is passed through the 11KV winding. V1\/V2 = N1\/N2. "description": "Breather examination.

7.Measurement of LOAD LOSS & IMPEDENCE. TRANSFORMER WHICH IS USED FOR THE PURPOSE OF DISTRIBUTION OF POWER. "@context": "http://schema.org", "name": "PROTECTION OF TRANSFORMERS", This test verifies the Dyn-11 vector group of a distribution transformer. Using this principle, the turns ratio is measured with the help of a turns ratio meter. MAINTENANCE BUSHINGS Bushings should be cleaned and inspected for any cracks. "description": "TRANSFORMER WHICH IS USED FOR THE PURPOSE OF DISTRIBUTION OF POWER. RMM Systems, LLC By Sam Rietta RMM Systems, LLC is a manufacturer's representative firm focused on providing value added sales solutions by providing. "@type": "ImageObject", "description": "Transformer is the heart of any power system. "description": "Dust & dirt deposition, Salt or chemical deposition, cement or acid fumes depositions should be carefully noted and rectified. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/35/TYPE+TESTS+LIGHTENING+IMPULSE+TEST.jpg", TESTING, MAINTENANCE & PROTECTION OF DISTRIBUTION TRANSFORMERSPresented by PRASHANT P. NANKAR TRANS-DELTA ELECTRICALS "@type": "ImageObject", "@type": "ImageObject", { AIR RELEASE PLUG. { { ROUTINE TESTS Oil BDV TEST.Oil breakdown voltage is checked as per IS-335.

instrument ROUTINE TESTS 6.Measurement of NO LOAD LOSS & current.The iron losses and no load current are measured in this test. Using this principle, the turns ratio is measured with the help of a turns ratio meter. (EFFICIENCY & REGULATION) 8.Vector Group Verification. "@type": "ImageObject", "name": "TESTING, MAINTENANCE & PROTECTION OF DISTRIBUTION TRANSFORMERS", "@type": "ImageObject", NATURALY COOLED (ONAN TYPE). "width": "800" "width": "800" Recommended Values are. 9.Oil BDV test. The transformer should also withstand the routine tests after the short circuit test. IHDR i |/n gAMA zTXtDescription 8x Jr IDATxMhwq{j'C]B2jC6W7>z5$Rc(ADR+p@KgK// RKziaFWZi5;3>F*aE5_[X][>}KZI.;'O>.^^]U9w}]dPMWsz;d70_SB$cs?3YI7D7u]{PDIU[P5L!jcSwyR3'"$g`X1'C!FwdHzZY'9aaj5_;ELjcfQYu3)3ivw;8g!Q)3iveXB @>7SCx5Iftjc3|ZYG je=Y T$d04X@M=B]c 6g-8 5k2nxx9G0{8a b6IV;z+_;p je JKP7^]TDo?yB!TsCAt[;0,!m1vACQoXaXB`[LNEL! DRAIN PLUG. "@type": "ImageObject", "name": "", { BDV, Color and smell of oil are indicative. ",

"description": "", "@context": "http://schema.org", For a 11KV/433V transformer,866 Volts are applied at the 433V winding with the help of a Generator for 1 minute. HV terminals are connected to the supply bus of the testing plant. LV winding connected together and given 3 KV for 1 minute. (EFFICIENCY & REGULATION)", "@context": "http://schema.org", { { Explosion Vent. PRV for OLTC. The iron losses and no load current are measured in this test. Breather examination. All the dielectric tests check the insulation level of the job.

It may lead to sludge formation and acidic contents. "@type": "ImageObject", Insulation resistance of the transformer should be checked once in 6 months. "description": "TESTING IS CARRIED OUT AS PER IS ROUTINE , TYPE TESTS & SPECIAL TESTS. Sherajul Islam. "@type": "ImageObject", For a three phase transformer, impulse is carried out on all three phases in succession. "description": "", "width": "800" "description": "This tests measures the ability of the transformer to withstand the mechanical and thermal stresses caused by the external short circuit. }, 11 Any failure to the transformer can extremely affect the whole functioning of the organization. The 433V winding is charged at 433V supply & the 11KV winding is left open .The power consumed by the transformer at no load is the no load loss in the transformer. "@context": "http://schema.org", 7.RECTIFIER TRANSFORMER. The frequency of the 866V supply is also increased to 100HZ. Spherical electrodes with gap of 2.5 mm. Faulty Termination (Improper sized lugs etc). "width": "800" }, 38 If it is correct , then the voltage ratio is assumed to be correct. ", Oil breakdown voltage is checked as per IS-335. "name": "ROUTINE TESTS 8.Vector Group Verification test", The LV is short circuited. "name": "ROUTINE TESTS", { 2022 SlidePlayer.com Inc. All rights reserved. 500ml Oil sample. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/30/ROUTINE+TESTS+7.Measurement+of+LOAD+LOSS+%26+IMPEDENCE.%28EFFICIENCY+%26+REGULATION%29.jpg", ", "description": "", The best way of protecting a transformer is to have good preventive maintenance schedule.

glass pot. 10.PHASE SHIFTING TRANSFORMER. Generator Protection. PRIMARY IS DELTA CONNECTED AND SECONDARY IS STAR CONNECTED. 10.Tests on OLTC (if Attached) BDV, Color and smell of oil are indicative. "width": "800" "contentUrl": "https://slideplayer.com/slide/3970542/13/images/34/ROUTINE+TESTS+Oil+BDV+TEST..jpg", We think you have liked this presentation. glass pot. 6.BOOSTER TRANSFORMER. "width": "800" }, 21 "@type": "ImageObject", Temperature rise test. AMONGST ALL THE TYPES OF TRANSFORMERS THIS IS THE MOST REQUIRED AND MOST USED TYPE. HORN GAPS & Lightening Arrestor. The record of current wave form is noted. Equipment used : Wattmeters or power analyser. 13.GROUNDING TRANSFORMERS 14.CONVERTER TRANSFORMER "@context": "http://schema.org", Equipment used : Wattmeters or power analyser. { "description": "", ROUTINE TESTS 1.Measurement of winding resistanceThis test measures the resistance of the HV & LV winding. "@type": "ImageObject", "@context": "http://schema.org", { Improper core bolt insulation. "@type": "ImageObject", This induces 22KV on 11KV side. Burr \/sharp edges to the winding conductor. The frequency of the 866V supply is also increased to 100HZ. "@type": "ImageObject", 6.Measurement of NO LOAD LOSS & current. ", Temperature rise test "width": "800"

"@type": "ImageObject", ", ROUTINE TESTS 2.Measurement of insulation resistanceMeasures the insulation resistance of HV & LV windings with respect to earth (body) and between LV & HV winding. }, 36 Regular inspection of OIL & WINDING TEMPERATURE METER readings. {

Equipment used : Turns Ratiometer "@type": "ImageObject", HV high voltage test : LV winding connected together and earthed. "@context": "http://schema.org", Similarly no wave form distortion. The 433V winding is charged at 433V supply & the 11KV winding is left open .The power consumed by the transformer at no load is the no load loss in the transformer. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/41/MAINTENANCE+BUSHINGS.+Bushings+should+be+cleaned+and+inspected+for+any+cracks..jpg", "width": "800" }, 30 If acidity is between 0.5 to 1mg KOH, oil should be kept under observation. "@context": "http://schema.org",

Burr /sharp edges to the winding conductor. { "contentUrl": "https://slideplayer.com/slide/3970542/13/images/1/TESTING%2C+MAINTENANCE+%26+PROTECTION+OF+DISTRIBUTION+TRANSFORMERS.jpg", The frequency of the 866V supply is also increased to 100HZ. There should not be any mechanical distortion, fire to the transformer during this test. DISTRIBUTION TRANSFORMER. "width": "800" "name": "SPECIAL TEST Short circuit withstand ability test. LV high Voltage test : HV winding connected together and earthed. "@context": "http://schema.org", Oil Surge Relay for OLTC. "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_8.jpg", ", "name": "", "width": "800" "@context": "http://schema.org", { PRV for OLTC. Equipment used : Wattmeters or power analyser. The voltage is applied on each of the line terminal in succession, keeping the other terminals earthed. ", The transformer should also withstand the routine tests after the short circuit test. "name": "ROUTINE TESTS 5.Measurement of voltage ratio", 2000Mohms for HV & 500 Mohms for LV. 8.LOCOMOTIVE TRANSFORMER. "name": "TYPES OF TRANSFORMER BY APPLICATION", SPECIAL TESTS Additional Impulse test Short circuit testMeasurement of zero Phase sequence Impedance test. }, 42 }, 6 }, 15 "contentUrl": "https://slideplayer.com/slide/3970542/13/images/6/PARTS+OF+TRANSFORMER+MAIN+TANK+RADIATORS+CONSERVATOR+EXPLOSION+VENT.jpg", Supply is made on and closed after specified duration of short circuit. Improper brazing of joints. ROUTINE TESTS 3.Seperate source voltage withstand test (High Voltage tests on HV & LV)- This test checks the insulation property between Primary to earth, Secondary to earth and between Primary & Secondary. }, 3 "width": "800" Quality Service Providing Quality Performance. "@context": "http://schema.org", "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_33.jpg", "contentUrl": "https://slideplayer.com/slide/3970542/13/images/4/DISTRIBUTION+TRANSFORMER.jpg", "description": "Additionally following tests are included in type tests. SPECIAL TEST Short circuit withstand ability test.This tests measures the ability of the transformer to withstand the mechanical and thermal stresses caused by the external short circuit. HT Circuit breaker with Over load, Earth Fault relay tripping. ", "name": "TYPE TESTS LIGHTENING IMPULSE TEST", HT Circuit breaker with Over load, Earth Fault relay tripping. "width": "800" "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_17.jpg", "@context": "http://schema.org", If acidity is between 0.5 to 1mg KOH, oil should be kept under observation. WHAT IS A TRANSFORMER?

}, 24 "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_31.jpg", "description": "3.Seperate source voltage withstand test (High Voltage tests on HV & LV)- This test checks the insulation property between Primary to earth, Secondary to earth and between Primary & Secondary. }, 7 }, 32 }, 47

"@type": "ImageObject", "@type": "ImageObject", Dehydration of Silica gel if necessary. "width": "800" { "@context": "http://schema.org", IS-2026 is the NATIONAL I S STANDARD. MAINTENANCE Periodic checking of any loose connections of the terminations of HV & LV side. Dust & dirt deposition, Salt or chemical deposition, cement or acid fumes depositions should be carefully noted and rectified. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/37/SPECIAL+TEST+Short+circuit+withstand+ability+test..jpg", ", ",

It may lead to sludge formation and acidic contents. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/3/TYPES+OF+TRANSFORMER+BY+APPLICATION.jpg", The current and voltage wave shapes are recorded on the oscilloscope and any distortion in the wave shape is the criteria for failure. Incomplete drying. ", }, 9 }, 10 "name": "FAILURES & CAUSES Insufficient Oil level. Cleanliness in the Substation yard with all nets, vines, shrubs removed. Hence preventive maintenance is always cost effective and time saving. Cleanliness in the Substation yard with all nets, vines, shrubs removed. "@context": "http://schema.org", Supply is made on and closed after specified duration of short circuit. This test measures the power consumed by the transformer when the 433V winding is short circuited and The rated current is passed through the 11KV winding. Megger values along with oil values indicate the condition of transformer. Oil when topped up shall be of the same make. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/19/TYPE+TESTS+THESE+TESTS+ARE+CARRIED+OUT+ONLY+ON+ONE+TRANSFORMER+OF+THE+LOT.+All+routine+tests..jpg", "@context": "http://schema.org", "contentUrl": "https://slideplayer.com/slide/3970542/13/images/32/ROUTINE+TESTS+8.Vector+Group+Verification+test.jpg", 100 mm L X 70 mm B X 80 mm Ht. "@type": "ImageObject", "@context": "http://schema.org", ", The values of resistance should be balance for all three phases and should match the designed values. { "description": "Measurement of zero Phase sequence Impedance test. "width": "800" Measurement of acoustic noise level.

}, 40 "@context": "http://schema.org", Insufficient cooling ducts in the winding. "name": "SPECIAL TESTS Additional Impulse test Short circuit test", { Equipment used : voltmeter. ROUTINE TESTS 5.Measurement of voltage ratioThis test measures the voltage ratio as per the customers requirement. "@context": "http://schema.org", "@context": "http://schema.org", "description": "Prolonged Over loading. "@context": "http://schema.org", One impulse of a reduced voltage between 50 to 75% of the full test voltage and subsequent three impulses at full voltage. The 433V winding is charged at 433V supply & the 11KV winding is left open .The power consumed by the transformer at no load is the no load loss in the transformer. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/22/ROUTINE+TESTS+2.Measurement+of+insulation+resistance.jpg", ",

}, 34 { 100 mm L X 70 mm B X 80 mm Ht. To view this video please enable JavaScript, and consider upgrading to a web browser that

", "name": "MAINTENANCE OF TRANSFORMER", "@type": "ImageObject", Equipment used : MOTOR GENERATOR SET. PARTS OF TRANSFORMER MAIN TANK RADIATORS CONSERVATOR EXPLOSION VENTLIFTING LUGS AIR RELEASE PLUG OIL LEVEL INDICATOR TAP CHANGER WHEELS HV/LV BUSHINGS FILTER VALVES OIL FILLING PLUG DRAIN PLUG CABLE BOX "width": "800" }, 37 For a three phase transformer, impulse is carried out on all three phases in succession. Winding Temperature indicators. "@type": "ImageObject", "description": "", }, 20 Oil when topped up shall be of the same make. Periodic Dissolved Gas Analysis can be carried out. One impulse of a reduced voltage between 50 to 75% of the full test voltage and subsequent three impulses at full voltage. { Hence preventive maintenance is always cost effective and time saving. ", Leakages to be attended. Regular inspection of OIL & WINDING TEMPERATURE METER readings. "@type": "ImageObject", "@type": "ImageObject", 11KV/433V is the standard voltage rating. "width": "800" "name": "MAINTENANCE PROCEDURE", "name": "TYPE TESTS THESE TESTS ARE CARRIED OUT ONLY ON ONE TRANSFORMER OF THE LOT. Oil BDV & acidity checking at regular intervals. HV winding connected together and given 28 KV ( for 11KV transformer) for 1 minute. "width": "800" "@type": "ImageObject", TRANSFORMER IS A STATIC DEVICE WHICH TRANSFORMS A.C. ELECTRICAL POWER FROM ONE VOLTAGE TO ANOTHER VOLTAGE KEEPING THE FREQUENCY SAME BY ELECTROMAGNETIC INDUCTION. ABSTRACT: Electricity is a form a energy and is playing vital role in the world. "@context": "http://schema.org", HV winding connected together and given 28 KV ( for 11KV transformer) for 1 minute. "@type": "ImageObject",

Magnetic Oil level Gauge. 4.Induced Over voltage Withstand test (DVDF test)- This test checks the inter turn insulation. Magnetic balance test. "name": "MAINTENANCE Periodic checking of any loose connections of the terminations of HV & LV side. Effect of actual frequency must be taken into account. 500ml Oil sample. This tests measures the ability of the transformer to withstand the mechanical and thermal stresses caused by the external short circuit. }, 31 If it is correct , then the voltage ratio is assumed to be correct. "name": "", Equipment used : Digital resistance meter. "name": "TESTING OF TRANSFORMER", ROUTINE TESTS ( TO BE CARRIED OUT ON EACH JOB), 3.Seperate source voltage withstand test (High Voltage tests on HV & LV), 4.Induced Over voltage Withstand test (DVDF test), 7.Measurement of LOAD LOSS & IMPEDENCE. "@type": "ImageObject", "name": "DISTRIBUTION TRANSFORMER", "width": "800" }, 2 Seepage of water in oil.Prolonged Over loading. ", "name": "", "@context": "http://schema.org", "@context": "http://schema.org", "width": "800" "width": "800" "name": "ROUTINE TESTS Oil BDV TEST. "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_9.jpg", }, 43 "width": "800" "description": "", Faulty operation of tap changer switch. For a three phase transformer, impulse is carried out on all three phases in succession. { Conservator to be cleaned from inside after every three years. "width": "800" Effect of actual frequency must be taken into account. 12.HIGH VOLTAGE TESTING\/SC TESTING TRF. Dry type transformers Zaragoza Accessories and options, Electrical Machine-I EE 2107 Dr. Md. Leakages to be attended. Winding Temperature indicators. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/23/ROUTINE+TESTS.jpg", "@type": "ImageObject", "@type": "ImageObject", "@context": "http://schema.org", There should not be any mechanical distortion, fire to the transformer during this test. { HV\/LV BUSHINGS. "name": "PROTECTION OF TRANSFORMERS", Oil Surge Relay for OLTC. CABLE BOX. }, 4 "@type": "ImageObject", "contentUrl": "https://slideplayer.com/slide/3970542/13/images/28/ROUTINE+TESTS+6.Measurement+of+NO+LOAD+LOSS+%26+current..jpg", { }, 41 HT Circuit breaker with Over load, Earth Fault relay tripping. "@type": "ImageObject", "@context": "http://schema.org", "description": "This test measures the voltage ratio as per the customer\u2019s requirement. { { Any failure to the transformer can extremely affect the whole functioning of the organization. { "@context": "http://schema.org", OIL LEVEL INDICATOR. 3.CURRENT TRANSFORMER. "description": "", fuse. "width": "800" "width": "800" "@context": "http://schema.org", Recommended Values are 2000Mohms for HV & 500 Mohms for LV. Chapter 12 Transformers. The voltage is applied on each of the line terminal in succession, keeping the other terminals earthed.

"@type": "ImageObject", }, 28 }, 25 OIL FILLING PLUG. 25,63,100,160,200,250,315,400,500,630,750 , 1000 , 1250,1500,2000,2500 KVA. "description": "Improper formation of core.

"description": "HT fuse & D.O. Similarly no wave form distortion. Conservator to be cleaned from inside after every three years. "@context": "http://schema.org", "@type": "ImageObject", All routine tests Additionally following tests are included in type tests Lightening Impulse test. TAP CHANGER. MAINTENANCE OF TRANSFORMERTransformer is the heart of any power system. "@type": "ImageObject", "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_10.jpg", Burr to the lamination blades Improper brazing of joints. ", "name": "ROUTINE TESTS 4.Induced Over voltage Withstand test (DVDF test)- This test checks the inter turn insulation. { Measures the insulation resistance of HV & LV windings with respect to earth (body) and between LV & HV winding. Dust & dirt deposition, Salt or chemical deposition, cement or acid fumes depositions should be carefully noted and rectified. { }, 22 Seepage of water in oil. Equipment used : High Voltage tester ( 100KV & 3KV). Incomplete drying. Breather examination. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/43/PROTECTION+OF+TRANSFORMERS.jpg", Equipment used : MOTOR GENERATOR SET Using this principle, the turns ratio is measured with the help of a turns ratio meter. }, 33 "@type": "ImageObject", Explosion vent diaphragm examination. "width": "800" "width": "800" }, 26 LV winding connected together and given 3 KV for 1 minute. }, 12 "@context": "http://schema.org", The transformer should also withstand the routine tests after the short circuit test. Dehydration of Silica gel if necessary. ", "@type": "ImageObject", "contentUrl": "https://slideplayer.com/slide/3970542/13/images/2/WHAT+IS+A+TRANSFORMER.jpg", }, 14 "width": "800" "name": "", FAILURES & CAUSES Insufficient Oil level. "name": "ROUTINE TESTS 2.Measurement of insulation resistance", Substations Chapter 4 Substations Major types of equipment found in most transmission and distribution substations with their purpose.

"width": "800" AMONGST ALL THE TYPES OF TRANSFORMERS THIS IS THE MOST REQUIRED AND MOST USED TYPE. Faulty operation of tap changer switch. Download ppt "TESTING, MAINTENANCE & PROTECTION OF DISTRIBUTION TRANSFORMERS". HORN GAPS & Lightening Arrestor. Equipment used : OIL BDV TEST SET. "width": "800" Impulse generator is used to produce the specified voltage impulse wave of 1.2/50 micro seconds wave One impulse of a reduced voltage between 50 to 75% of the full test voltage and subsequent three impulses at full voltage. }, 29 Oil level checking. "@context": "http://schema.org", Insulation resistance of the transformer should be checked once in 6 months. Additionally following tests are included in type tests. (EFFICIENCY & REGULATION). "description": "", "description": "Measures the insulation resistance of HV & LV windings with respect to earth (body) and between LV & HV winding. }, 23 { TRANSFORMER IS A STATIC DEVICE WHICH TRANSFORMS A.C. ELECTRICAL POWER FROM ONE VOLTAGE TO ANOTHER VOLTAGE KEEPING THE FREQUENCY SAME BY ELECTROMAGNETIC INDUCTION. "name": "FAILURES & CAUSES Bad Quality of raw material. The reactance of the winding measured before and after the S.C. test should not vary beyond the limits stated in the IS2026. MAINTENANCE PROCEDUREOIL : Oil level checking. Impulse generator is used to produce the specified voltage impulse wave of 1.2/50 micro seconds wave. "description": "", WHEELS. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/25/ROUTINE+TESTS+4.Induced+Over+voltage+Withstand+test+%28DVDF+test%29-+This+test+checks+the+inter+turn+insulation..jpg", > nl (D OkPNG Impulse generator is used to produce the specified voltage impulse wave of 1.2\/50 micro seconds wave. { Faulty Termination (Improper sized lugs etc) Power Theft. "@type": "ImageObject", "description": "The iron losses and no load current are measured in this test. HV high voltage test : LV winding connected together and earthed. "description": "", "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_24.jpg", Megger values along with oil values indicate the condition of transformer. }, 45 Bad insulation covering. "name": "ROUTINE TESTS 1.Measurement of winding resistance", 3.Seperate source voltage withstand test (High Voltage tests on HV & LV) 4.Induced Over voltage Withstand test (DVDF test) 5.Measurement of voltage ratio. Buchholz Relay. V1/V2 = N1/N2 The voltage ratio is equal to the turns ratio in a transformer.

This induces 22KV on 11KV side. "@type": "ImageObject", Amount of Protection Rated power of the generator Ratio of its capacity to the total capacity of the system Configuration of the. Equipment used : Digital resistance meter. Oil when topped up shall be of the same make. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/18/TESTING+OF+TRANSFORMER.jpg",

This test measures the voltage ratio as per the customers requirement.

LT circuit breaker. "@context": "http://schema.org", Equipment used : Turns Ratiometer. Equipment used : Digital resistance meter. "contentUrl": "https://images.slideplayer.com/13/3970542/slides/slide_11.jpg", "width": "800" "@type": "ImageObject", HV high voltage test : LV winding connected together and earthed. FAILURES & CAUSES Bad Quality of raw material.Transit damaged transformers. 11.WELDING TRANSFORMER. "description": "Presented by. Periodic Dissolved Gas Analysis can be carried out. "description": "Transit damaged transformers. The voltage ratio is equal to the turns ratio in a transformer. "@context": "http://schema.org", "description": "Oil breakdown voltage is checked as per IS mm L X 70 mm B X 80 mm Ht. DISTRIBUTION TRANSFORMER 2.POWER TRANSFORMER 3.CURRENT TRANSFORMER 4.POTENTIAL TRANSFORMER 5.FURNACE TRANSFORMER 6.BOOSTER TRANSFORMER 7.RECTIFIER TRANSFORMER 8.LOCOMOTIVE TRANSFORMER 9.MINING TRANSFORMER 10.PHASE SHIFTING TRANSFORMER 11.WELDING TRANSFORMER 12.HIGH VOLTAGE TESTING/SC TESTING TRF. Bad insulation covering. Sludge, dust, dirt ,moisture can be removed by filtration. STANDARD KVA ratings are 25,63,100,160,200,250,315,400,500,630,750 , , 1250,1500,2000,2500 KVA. }, 18 "contentUrl": "https://slideplayer.com/slide/3970542/13/images/46/FAILURES+%26+CAUSES+Faulty+design+Poor+Workmanship.jpg", Buchholz Relay. fuse. 13.GROUNDING TRANSFORMERS. Dry type transformers Zaragoza Traction application, Topic 1 : Magnetic Concept and Transformer. "contentUrl": "https://slideplayer.com/slide/3970542/13/images/40/MAINTENANCE+PROCEDURE.jpg",

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