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Topic :: Transformer





Transformer Interview Questions
Questions Answers Views Company eMail

On what basis do you decide the ONAN (Oil Natural air natural) or Dry type transformer for a project?

Semac,

1607

No load tap changing transformer working

1657

total numbers of earthing of a transformer

1 2956

In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

1780

What is the tests required for a 132 kV, 400 kV , 765 kV for a Circuit Breaker and Power Transformer before commissioning ?

Eprosys Engineering Consultants,

1602

Motor,transformers,capacitor tubelight etc....

1649

some basic standard questions on transformer.

United Engineering,

1811

I Need standard operation procedure(SOP)for 500kva Oil type transformer oil filtration & Procedure for IR value checking.

Reliance,

2899

why should small green grass ans small plant should not be there inside the transformer Yard in the factories

Riddhi Siddhi,

1766

i have a 1500kVA transformer what is the kWH meter i need to use?

HP, L&T, Mohammed Harasani Architects,

1795

ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

2030

What is the meaning of loop in transformer

AST,

1804

Actually why the transformers ate rated in KVA.?

Torrent Pharma, XYZ,

2 4780

stand by earth fault protection (51G) for transformer rating 2000 kVA,Dyn11,33/0.400 V. LV NCT ratio and necessary resistor and metrosil values how to calculate

2808

I want to ask a question which i faced during testing of Capacitive Voltage Transformer in AIS. We have measured the C1 , C2 individually , but when we start to measure the total C1+C2 , the testing equipment shuts down and says low loading. Kindly is it possible to find the total capacitance by using measuring device. kindly briefly explain the procedure.

AIS,

1843




Related Topics


Un-Answered Questions { Transformer }

Difference between PowerPlay transformer and power play reports?

2523


All tape of electrical questions Answers tape of motor transformer e.o.t crane

2658


If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

2090


what is R Core Transformer. how it differs from normal transformers. dont search in net and post the answer.

2101


Draw the line diagram of diffretial relay connected to transformer?

2442


How to select the earthing transformer,for DELTA TO DELTA TRANSFORMER OR ALTERNATOR SIDE.Pls post your answers and calculation.

2380


Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

4334


how we arrange the hv side with delta connection in case 33/11kv of transformer.

2003


what is the criterion for selecting vector group of Transformers ? i mean how to decide vector group of Generator transformer, substation trasformer and transformer at consumer end

2363


i need the curve duty cycle and amper for (150 kva @50% dyty cycle) transformer turn ratio :19 and vin 400

2137


what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?

1934


How is the percentage impedence of a transformer fixed at design stage???

1986


How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

2084


what is a pulse transformer? how rise time of pulse changes when ever the voltage changes?

1961


what r the checklist while installing 500 kva transformer

2331