Product Details

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Product Parameters

1. Main parameters of the product are shown in Table 1 

Table 2 — Main technical parameters of VLF series frequency high voltage generator

Model	Peak Voltage	Measurement Range	Weight	Application
VLF-30/1.1	30kV	≤1.1μF at 0.1Hz	Controller: 4kg Booster: 25kg	For cables and generators with voltage 10kV and below
		≤2.2μF at 0.05Hz
		≤5.5μF at 0.02Hz
VLF-50/5.0	50kV	≤5.0μF at 0.1Hz	Controller: 5kg Booster: 55kg	For burning through cable faults
		≤10μF at 0.05Hz
		≤25μF at 0.02Hz
VLF-80/1.1	80kV	≤1.1μF at 0.1Hz	Controller: 5kg Booster: 45kg	For cables and generators with voltage 35kV and below
		≤2.2μF at 0.05Hz
		≤5.5μF at 0.02Hz

Note: If powered by a portable generator, the output voltage and frequency of the generator must be stable (generally requiring power greater than 3kW, frequency 50Hz, voltage

220V±5%), otherwise some auxiliary measures should be taken to stabilize the generator output. 

3. Output voltage accuracy:

Output high voltage peak instability: ≤1%

Output voltage frequency instability: ≤3%

Output voltage waveform distortion rate: <5%

4. Operating environment: Temperature -10°C to +40°C, humidity ≤85%RH

5. Test range description:

1) The capacitance of the test object must not exceed the maximum rated capacitance of the instrument; see Table 1 for values;

2) If the capacitance of the test object is too small, it will affect the output waveform. If it is less than 0.05μF, the instrument will not output normally. In this case, the auxiliary device (optional) provided by our company can be used. 

3) Estimation of capacitance of common electrical equipment is shown in Tables 2 and 3

Table 2 — Single-phase-to-ground capacitance of different types of generators

Model	Turbine Generator			Hydro Generator
Generator Capacity (MW)	200	300	600	85	125-150	300	400
Single-phase-to-ground Capacitance (μF)	0.198	0.18-0.26	0.31-0.34	0.69	1.8-1.9	1.7-2.5	2.0-2.5

Product Models

ZSVLF Frequency High Voltage Generator