what is a dc leakage test
Questions about DC leakage test
What is a DC leakage test?
What is acceptable leakage current of DC leakage test?
What is the DC leakage current test procedure?
What is a DC leakage test?
The DC leakage test is a method used to evaluate the long-term power storage capacity of capacitors. During this test, the rated voltage is applied to the capacitor until it is fully charged, which helps to identify potential issues with insulation. It's commonly included in capacitor qualification test plans. Additionally, due to its low cost, compact size, and minimal power requirements, the DC leakage test is sometimes preferred for assessing generator stator insulation.
What is acceptable leakage current of DC leakage test?
The acceptable leakage current in a DC leakage test depends on the type of electrical equipment and its intended application. Briefly speaking, the lower the leakage current, the better.Officially, in industrial environments, the acceptable range typically falls between 0.5 mA and 3.5 mA, depending on specific standards and the equipment's function. Any leakage current significantly above these limits, especially exceeding 30 mA, can pose serious safety risks. It means potential insulation failure or electrical faults that need to pay attention. In a word, whether for users or electrical equipment, regular testing and monitoring are important to ensure that leakage currents remain within safe limits.
What is the DC leakage current test procedure?
To briefly speaking, the DC leakage current test procedure is wiring, testing and getting results.
You need to pay attention when using a multimeter to do the test.
1. Only qualified technicians can operate the instrument!
2. Please use the power cord specially used for this product and in line with the product specifications!
3. Only fuses of the type and rating specified in this product can be used!
4. In addition to the product grounding through the power line grounding wire, the grounding column of the product shell must be grounded! In order to prevent electric shock, the grounding conductor must be reliably connected to the ground! Before connecting with the input or output terminals of the product, make sure that the product has been correctly and reliably grounded!
5. To prevent the risk of fire or electric shock, please make sure that all terminal ratings of this product are correct before connecting and operating this product!
6. When the test wire is connected with the live terminal, do not connect or disconnect the test wire at will. Since the input and output terminals, test posts, etc. may have voltage, you must be careful when plugging in and out the test line or power socket to avoid electric shock!
7. Please do not operate when the cover plate or panel of the instrument has been removed or opened
8. Please do not touch the exposed circuit and live metal before the product is electrified or not discharged, so as to avoid electric shock and personal injury!
9. Please do not continue to operate if the product has suspected fault or damage!
10. Please do not operate in humid environment!
