Very low frequency HV generator as the new generator of AC withstand voltage tester, replacing resonant withstand voltage tester, is widely used in AC withstand voltage test of large capacity equipments such as generator, cable, insulator, power capacitor, large transformer etc. Not only can it be the first choice of on-site and outdoor testing, but also as the ultra low frequency source.

Advantage:

1. Small volume, light weight, easily to operate. Theoretical speaking, the capacity is 1/500 of power frequency.

2. AC ultra low frequency tester doesn't form tree-clearance in the insulating condition.

3. Unlike DC test, it's uneasy to destroy cables; meanwhile the capacitance effect of testing articles has no influence to it.

4. Pernicious polarization charge would make no way to dielectric during the testing.

Features:

1. Adopting digital conversion technology and microcomputer controlling system make the testing process completely automatic.

2. The large liquid crystal screen insure that testing wave-form (sinusoid wave) can be display, testing reports can be printed.

3. Full protection: multiple protection (over-voltage protection, over-current protection), prompt action (action time≤20ms), the device safe and reliable.

4. Multi-frequency selections (0.1HZ, 0.05HZ, 0.02HZ) strengthen the load-bearing capability.

5. Safe and reliable: the controller connect with HV generator, photoelectric control, safe and reliable.

6. Adopts high and low voltage closed-loop negative feedback control circuit, output without capacitance-rised effect.