EXPERIMENT 16 AIM : TO FIND THE POLARITY AND TURNS RATIO OF A SINGLE PHASE TRANSFORMER.
OBJECTIVE It will check polarity of Equal as well as Nonequal Transformer. It will find transformer and its specification. APPARATUS: voltmeter 2 Nos., Testing Board, 2 Nos, Digital Multimeter 1 Nos Transformer 240 v/110v 1 Nos Tools Hand Tools Kit Wire Stripper THEORY: It is essential to know the relative polarity at any instant of primary and secondary terminals for making correct connections. When the two transformers are to be connected in parallel to share the load on the system. The marking is correct if voltage V3 is less than V1, such a polarity is termed as subtractive polarity. The standard practice is to have subtractive polarity because it reduces the voltage stress between adjacent loads. In case V3 > V...