Detailed explanation of inter turn withstand voltage
The turn to turn withstand voltage tester is a new type of instrument used for conducting turn to turn and layer to layer insulation withstand voltage tests on electromagnetic wire wound products. The following is a detailed introduction to the inter turn withstand voltage tester:
The core principle of the inter turn withstand voltage tester is to apply the same high surge voltage to the standard component and the tested component separately, and observe and compare the waveforms of the two through an oscilloscope to determine the insulation condition. It is mainly used for testing the inter turn insulation performance of coils or windings, and the pulse peak voltage can be set arbitrarily between 100V and 3000V.
The main features of the inter turn withstand voltage tester include:
1. Suitable for testing the inter turn insulation performance of coils or windings.
2. Complies with the standard JB/T9615-2000 “Test Method for Interturn Insulation of AC Low Voltage Motor Loose Inlaid Winding”.
3. The pulse waveform comparison method is used for detection, and the difference in the attenuation vibration waveform caused by the impulse voltage between the two is used to check whether the inter turn insulation of the motor winding is good.
In terms of operation, taking the RK2883/RK2885 turn to turn withstand voltage tester as an example, its operation methods include:
1. After turning on the instrument power, preheat for five minutes and observe if the working indicator light is on.
2. Conduct waveform analysis and compare different test samples using the same operating method to observe whether the waveforms overlap.
When adjusting the high voltage knob, the foot switch needs to be stepped on to adjust, but after the voltage is boosted, the foot switch cannot be stepped on for a long time. It should be loosened and stepped on to observe the coincidence of the waveform.
In addition, the working principle of the inter turn withstand voltage tester also involves applying the same pulse voltage to the standard coil winding and the tested winding, and comparing the transient waveforms of the two. This transient waveform is the waveform of attenuation oscillation occurring inside the coil, which can simultaneously determine the inductance, quality factor, number of turns difference, and inter turn short circuit of the winding.
Overall, the turn to turn withstand voltage tester is an efficient and non-destructive testing instrument that can accurately evaluate the turn to turn insulation performance of electromagnetic wire winding products, providing strong support for the manufacturing and quality inspection of electrical equipment such as motors and transformers.
