The "triple frequency generator" is used for the test of power transformers, voltage transformers and other tested products. When the transformer is at rated frequency and rated voltage, the iron core is close to saturation. If a power frequency power supply is used to apply a test voltage greater than the rated voltage across the windings of the tested transformer, the no-load excitation current will increase sharply to an unallowable level. It can be seen from the relational formula of induced potential that in order to apply a test voltage greater than the rated voltage without saturating the iron core, the method of increasing the power frequency can be used, and a power generator greater than the frequency multiplier must be used. The "triple frequency generator" currently on the market is selected based on the size of the capacity, which are: 3KVA, 5KVA, 10KVA, 20KVA, 30KVA, and the output frequency is 150Hz.
