Common Aspects ofPower Equipment 75
Determine its expected life if the 8°C rule for ½ life is found applicable
to electronics components.
Problem 3.15: A 1000 kVA, 1-phase transformer operating at 85% power
factor lagging at full rated load has a conductor power loss of 10 kW and
core loss of 5 kW. Determine its maximum possible efciency and the
corresponding load level as a percentage of the rated load.
QUESTIONS
Question 3.1 Identify at least two electrical products (other than the trans-
former, motor, generator, and those identied in Section 3.1) that work on
Faraday’s law of electromagnetic induction.
Question 3.2 Using Faraday’s law, explain why we lose radio and cell phone
communications while going through a long tunnel made of ...