Exam Question

### (a) Measures and Effects of Running a 60Hz System on a 50Hz Supply
Operating electrical equipment designed for a 60Hz supply on a 50Hz supply requires careful consideration due to changes in fundamental electrical properties. The effects are most pronounced in inductive devices like motors and transformers.
**Core Principle: Voltage/Frequency (V/f) Ratio**
The magnetic flux density (B) in the core of an induction motor or transformer is directly proportional to the voltage and inversely proportional to the frequency ($$B \propto V/f$$). To avoid magnetic core saturation, which leads to excessive eddy currents, hysteresis losses, and rapid overheating, the V/f ratio must be maintained. When frequency is reduced from 60Hz to 50Hz (a reduction of 16.7%), the voltage must be reduced proportionally.