The product combined modern digital frequency conversion advanced technology, and adopts microcomputer control. Voltage boost and reduction, measurement, protection all are automatic. Because of entire electronization, so small size and light weight, big screen LED displaying, clear and visually, can show output waveform, printing test report. Design index is fully suitable forn (Power equipment special-purpose measuring instrument general technology condition, 4th part: ultralow frequency high voltage generator general technology condition) electric industrial standard and use very conveniently. Presently domestic and overseas all adopt mechanical method to perform modulation and demodulation for ultralow frequency signal generation. So exist abnormal sine wave, big measure deviation, HV spark discharge, heavy equipment, moreover sine wave 2 and 4 quadrant needs big power high voltage resistor to discharge and reshape. So it has big power consumption. The product can overcome those weak points and have below characteristics

(1), Adopt single structure for ultralow frequency with lower or equal 50kV rated voltage (1 set booster); Cascaded structure is for higher than 50kV ultralow frequency  (2 sets booster). So reduce weight largely and increase loading capability. Moreover 2 sets booster can be independently as use for low voltage grade ultralow frequency.

(2), Current, voltage and waveform data all can be captured from high voltage side, so data is accurate.

(3), Have overvoltage protected function. If output is over specified voltage, instrument will shut down and within 20ms action.

(4), Have overcurrent protected function：designed for high-low voltage double protection，high voltage side can shut down and protect based on specified value; low voltages side can shut down and protect if over rated current，time of action all are lower than 20ms.

(5), High voltage output protected resistor is designed inside of booster, so no need to connect protected resistor.

(6), Because of adopting high and low closed-loop negative feedback control circuit，so no output capacitance raise effect.

  Table 1

1,Output rated voltage: refer to table 1 
2,Output frequency：0.1Hz, 0.05Hz, 0.02Hz 
3,Loading capacity： 0.1Hz     max 1.1µF 
                                        0.05Hz   max 2.2µF  
                                        0.02Hz  max 5.5µF
4,Measurement accuracy：3% 
5,Voltage + and - peak value deviation：≤3％ 
6,Voltage waveform distortion：≤5％ 
7,Usage conditions: indoor、outdoor；temperature：-10℃∽+40℃；humidity：≤85％RH 
8,Power protector tube：refer to table 1 
9,Power：frequency 50Hz，voltage 220V±5%.