The high-voltage withstand voltage test of electrical equipment is one of the important items stipulated in the "Insulation Preventive Test". The withstand voltage test can be divided into AC withstand voltage test and DC withstand voltage test. The AC withstand voltage test can be divided into power frequency, frequency conversion and 0.1Hz ultra-low frequency test technology. Among them, 0.1Hz ultra-low frequency technology is an excellent technology and is the current international electrician Technology recommended by the committee. Our company's new generation of ultra-low frequency and high-voltage generator is a core product independently developed by American technology. It adopts 7-inch touch screen, ARM7 single-chip microcomputer, high-speed AD acquisition circuit, and is equipped with background management software. It overcomes many shortcomings of similar domestic products. The cost performance is much higher than similar imported products, and it is especially suitable for electrical equipment with large insulation equivalent capacitance (such as: power cables, power capacitors, large and medium-sized generators and motors, etc.) withstand voltage test, in line with the new national power industry promulgated in 2004 Standard "Ultra-low frequency and high voltage generator general technical conditions DL/T849.4-2004" requirements.

1. Excellent technology: using digital frequency conversion technology, microcomputer control, the test process of boosting, depressurizing, measurement, protection, etc. is fully automated.

2. Convenient operation: simple wiring and fool-like operation.

3. Comprehensive protection: multiple protections (overvoltage protection, high and low voltage side overcurrent protection), rapid action (action time ≤ 10ms), the instrument is safe and reliable.

4. Safe and reliable: the controller and the high-voltage generator are connected with low voltage, photoelectric control, safe and reliable.

5. The high and low voltage closed-loop negative feedback control circuit is adopted, and the output has no capacity increase effect.

6. Complete configuration: capacitive touch screen, LCD Chinese character display, automatic storage, and automatic printing.

7. Large test range: 0.1Hz, 0.05Hz and 0.02Hz multiple frequency options, large test range.

8. Small size and light weight: very conducive to outdoor operations.

1. Output rated voltage: see the table below

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

3. Load capacity: 0.1H-1.1µF

0.05Hz-2.2µF

0.02Hz -5.5µF

4. Measurement accuracy: 3%

5. Positive and negative peak voltage error: ≤3%

6. Distortion degree of voltage waveform: ≤5%

7. Conditions of use: indoors and outdoors; temperature: -10℃～+40℃; humidity: ≤85％RH

8. Power fuse: see the table below

9. Power supply: voltage 220V±5%, 50±5Hz

10. The electric capacity of the tested product shall not exceed the rated electric capacity of the instrument. The numerical values are shown in the following table: