Answer / sowmya

actually both mean the same and may differ in some cases.....
because both are used to vary the voltage....

Answer / sajid m

auto transformer secondary is provided by taps that are
fixed in the winding but varic secondary voltage is providig
a sliding tip along the all of winding

Answer / ch.phani

autotransformer is just like a normal transformer provided
with tappings
but with variac any variation in the given range is possible
for example a 230v/270 v variac is used to vary the voltage
in range of (0-270)v

Answer / sunil datta

An auto transformer operates automatically and variac
manually.

we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?

0 Answers   Siemens,

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How Many Safety of Transformer

2 Answers  

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1. what is difference between VCB and ACB.how its works please explian.

6 Answers   ABB, Accenture, HP, Minda, Mother Dairy, Satyam Pharma,

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When is lag lead compensator is required?

0 Answers  

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Why the CT Secondary is rated as 5A generally?

2 Answers  

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What is Form factor?

2 Answers   NTPC,

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As per BIS, Earth pit resistence value?

4 Answers  

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What is the use of IGBT in UPS & its working??????????

5 Answers   Reliance,

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Earth Resistivity

2 Answers  

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Why can we connect the mobile charger both ways?

2 Answers  

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what happen if one of 3-phase line has a much higher load when we are using delta to star transformer? how we can over-come from that?

2 Answers   Getco,

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Meaning of ingrace protection for motor.for ex IPXY

0 Answers   BARC,

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