Short Circuit Test
The short-circuit test is performed to create the short-circuit characteristic curve of the machine. In this test, the end parts of the armature are short-circuited, and the machine is turning at a very low speed. The changing-flux variables and the corresponding armature current is measured.
Formula
ESC = Ia(Ra + Rs)
where
- ESC is short circuit voltage.
The resulting curve of the short circuit characteristic is shown, which demonstrates the armature resistance and reactance. The test is so significant in finding the machine performance under fault condition.
Testing of DC Machine
The direct current (DC) machines have been from the beginning of electrical engineering studies, since the end of the 19th century. They are used in many different industries such as manufacturing and transportation, and they are still applicable even though the current age is digital. The quality performances and dependability of these machines are the most important factors during their whole lifespan. This is why they are subject to extensive testing.
Testing is a tool that helps us to determine the functions of the machine, show if there are any mistakes, and correct them if needed. It also serves to define the instrument, which is an important criterion of its energy conservation and cost-effectiveness. Here we will consider the DC machine’s test type, procedure, and value.
Table of Content
- Definition of Testing
- Types
- Open Circuit Test
- Short Circuit Test
- Load Test
- Determination of Efficiency
- Applications