Equivalent load test for induction machines - The Forward Short Circuit Test

Often full load testing of induction machines with outputs greater than 1 M W present difficulties when attempting to verify the rated performance, esp ecially the temperature rise. This is because of limitations imposed by the manufacturer's power supplies and load equipment. The Forward Short Circui t Test, as an equivalent load test, is an alternate loading method which mo st manufacturer; and service facilities could employ with a minimum capital expenditure. The theory of the method is described and temperature rise te st results from a 1960 kW 4 pole machine are compared with test results obt ained using several other test methods.