A Very Low Frequency (VLF) AC Hipot Tester is a specialized electrical testing device used to assess the insulation integrity of high-voltage cables, transformers, switchgear, and other electrical equipment. The VLF AC Hipot Tester generates an AC voltage at a very low frequency, typically in the range of 0.01 Hz to 0.1 Hz, which is significantly lower than the standard power frequency of 50 or 60 Hz.

1. Output rated voltage：refer to table 1
2. Outpout frequency：0.1Hz、0.05Hz、0.02Hz
3. Load capacity:0.1Hz maximum 1.1µF 4. Measurement accuracy：3%
5. Plus&Minus voltage peak error value:≤3％
6. Voltage waveform distortion：≤5％
7. Use condition：indoor,ouTdoor,tempeature： 8. Power：220V±5%，50±5Hz
Table1

Model	Rated Voltage	Load	Fuse	Weight
	40kV	0.1Hz,≤1.1µF		Controller：6Kg
40KV /1.1			8A
		0.05Hz,≤2.2µF
	（Peak Value）			Booster：20Kg
		0.02Hz,≤5.5µF
	50kV	0.1Hz,≤1.1µF		Controller：6Kg
50kV/1.1			10A
		0.05Hz,≤2.2µF
	（Peak Value）			Booster：45Kg
		0.02Hz,≤5.5µF
	80kV	0.1Hz,≤1.1µF
80KV/0.5			20A	Controller：6Kg
		0.05Hz,≤2.2µF
	（Peak Value）
				booster：50Kg
		0.02Hz,≤5.5µF

1. Advanced technology:digital frequency conversion technology,microcomputer control,pressure rise, pressure reduction,measurement,protection,etc
2. The test process is fully automated.
3. Easy to operate:simple wiring,fool operation.
4. Comprehensive protection:multiple protection(over-voltage protection,over-current protection at high and low voltage sides),rapid action(when acting)
5. Room≤10ms),the instrument is safe and reliable.
6. Safety and reliability:the controller is connected with the low voltage of the high voltage generator, with photoelectric control,safe and reliable use.
7. The high and low voltage closed-loop negative feedback control circuit is adopted, and the output has no capacity rise effect.
8. Complete configuration:capacitive touch screen,LCD Chinese character display, automatic storage,automatic printing.
9. Large test range:0.1Hz,0.05Hz and 0.02hz multi frequency selection,large test range.
10. Small volume and light weight:it is very convenient for outdoor operation.

Vlf Hipot tester adopt 0.1Hz ultra-low frequency withstand voltage technology. It is especially suitable for withstand voltage test of electrical equipment with large insulation equivalent capacitance ,such as power cable, power capacitor, large and medium-sized generator and motor, etc.