What is the Definition of a winding resistance test?
Winding resistance measurements are made to determine if any changes have occurred in the current carrying path of the transformer. The DC Winding resistance test will indicate a change in dc winding resistance when there are short-circuited turns, poor joints or bad contacts.
What is the Purpose of the transformer winding resistance test?
• Calculation of power (I2 R) component of conductor losses
• To determine the temperature rise under load and for Calculation of winding temperatures at the end of a temperature test
• As a base for assessing possible damage
• To show changes in winding resistance due to short circuited winding turns, poor joints, or bad contacts.
• To determine if damage to the windings and/or their connections exists.
• To calculate the resistance component of the voltage drop under load
• To ascertain that the internal connections are correct.
The terminal-to-terminal resistance measurement can be made with the transformer winding resistance tester. To meet the need for rapid measurement of DC resistance of inductive coils, our company has developed the DC resistance tester based on its own technical advantages. With the novel power supply technology, this product features a small size, light weight, wide test range, strong anti-interference ability, complete protection functions, and large color LCD. Entirely controlled by the single-chip microcomputer, the tester is capable of automatically carrying out self-testing and data processing, and has the functions of automatic discharge and discharge indication. It also has high test accuracy and can be operated easily to measure the DC resistance rapidly.