The ultra-low frequency dielectric withstａnd voltage test is actually an alternative to the power frequency withstａnd voltage test. When the power frequency withstａnd voltage test is carried out on the large and medium-sized generators, motors, power cables, etc., because their insulating layers have a large capacitance, a large-capacity test transformer or resonant transformer is required. Such huge devices are not only cumbersome and expensive, but also very inconvenient to use. In order to solve this contradiction, the method of reducing the test frequency and thus the capacity of the test power supply is generally adopted internationally. It has been proved from many years of theory and practice at home and abroad that replacing the power frequency withstａnd voltage test with the 0.1Hz ultra-low frequency withstａnd voltage test can not only have the same equivalence, but also greatly reduce the size and weight of the equipment. It is about one-fifth of the power frequency, and the operation is simple.

Technical Parameters

1. Output voltage ratings: See Details of Table 1

2. Output frequency: 0.1Hz, 0.05Hz, 0.02Hz

3. Measurement accuracy: 3%

4. Positive and negative voltage peak errors: ≤ 3％

5. Voltage wave form distortion: ≤ 5％

6. Use condition: indoor and outdoor; temperature: -10℃∽+40℃

Humidity: ≤ 85％RH

7. Power: AC50Hz, 220V