Transformers Set 2

Step-up transformer ✘ Step-down transformer ✘ Potential transformer ✘ Current transformer ✔

its power factor will deteriorate ✘ its power factor will increase ✘ its power factor will remain unaffected ✘ its power factor will be zero ✔

low,low ✘ high,high ✘ low,high ✘ high,low ✔

tightness of clamping ✘ gauge of laminations ✘ size of laminations ✘ all of the above ✔

0.4 mm to 0.5 mm ✘ 4 mm to 5 mm ✘ 14 mm to 15 mm ✘ 25 mm to 40 mm ✔

Bmax ✘ Bmax1-6 ✘ Bmax1-83 ✘ B max ✔

180°C ✘ 120°C ✘ 90°C ✘ 75°C ✔

short-circuit test ✘ back-to-back test ✘ open circuit test ✘ any of the above ✔

0.8 leading power factor ✘ 0.8 lagging power factor ✘ zero power factor ✘ unity power factor ✔

low voltage side of high kVA transformers ✘ high frequency transformers ✘ high voltage side of small capacity transformers ✘ high voltage side of high kVA rating transformers ✔