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Ultralow Frequency High Voltage Generator LVF

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Application:
The LVF tester is applied in power cable and generator insulation test in power system

Features:
(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.

Parameters:

Table 1

Type

Rated voltage

Load capacity

Power fuse

Structure, weight

VLF-30/1.1

30kV

(peak)

0.1Hz,≤1.1µF

5A

 Controller:4kg

Booster:25 kg

0.05Hz,≤2.2µF

0.02Hz,≤5.5µF

VLF-40/1.1

30kV

(peak)

0.1Hz,≤1.1µF

6A

Controller:4 kg

Booster:35 kg

0.05Hz,≤2.2µF

0.02Hz,≤5.5µF

VLF-50/1.1

50kV

(peak)

0.1Hz,≤1.1µF

7A

Controller:4 kg

Booster:50 kg

0.05Hz,≤2.2µF

0.02Hz,≤5.5µF

VLF-60/1.1

60kV

(peak)

0.1Hz,≤1.1µF

10A

Controller:4 kg

Primary booster(30kV):25 kg

Second booster(30kV):45 kg

0.05Hz,≤2.2µF

0.02Hz,≤5.5µF

VLF-70/0.5

70kV

(peak)

0.1Hz,≤0.5µF

10A

Controller:4 kg

Primary booster(30kV):25 kg

Second booster(40kV):50 kg

0.05Hz,≤1µF

0.02Hz,≤2.5µF

VLF-80/0.5

80kV

(peak)

0.1Hz,≤0.5µF

12A

Controller:4 kg

Primary booster(30kV):25 kg

Second booster(50kV):50 kg

0.05Hz,≤1µF

0.02Hz,≤2.5µF