I. Overview
Impulse voltage generator is a device to generate impulse voltage wave power withstand the test atmosphere for over-voltage and over voltage insulation performance, so the impulse voltage generator not only can produce lightning impulse voltage waveform, lightning impulse voltage chopper, also can produce operating impulse voltage waveforms.
This series of impulse voltage generator may insulator string, long air gap, bushings, transformers, transformers and other impulse voltage test conducted tests and other scientific research.
Third, the use conditions
Installation, use at not more than 1000 meters above sea level
Ambient air temperature: -20 ℃ ~ + 40 ℃, air relative humidity less than 90% (20 ℃), the maximum temperature: 25 ℃
No conductive dust exist
No fire and explosion dangerous goods
Does not contain corrosive metal and insulation gases and vapors
No severe vibration, impact and intense turbulence
Not more than 3 degrees horizontal horizon, mobile device ground roughness ±1mm / m2
Supply voltage waveform is a sine wave, waveform distortion rate less than 3%, the frequency of 50Hz, power side from the outside should not be over-voltage.
There is a reliable ground, grounding grid should have good impact properties, steady state grounding resistance should not exceed 0.5W, and the ground should be the body attachment.
When generating lightning impulse voltage wave generator high-side on the ground around the minimum safe distance from the object as follows:
Table1、 1500 impulse voltage generator
Rated voltage (kV) | 300 | 300 | 900 | 1500 |
The minimum distance (m) | 1 | 1.5 | 2.25 | 3.5 |
Fourth, the main technical parameters
1, Nominal voltage: p500kV
2, rated voltage level: p100kV
3, nominal energy: 50kJ
4, each level of the main capacitor: 2uF 100kV
5, the impact of the total capacitance: 0.4uF
6, the total number of stages: 5
7, the load capacitance: 0-2000PF following can produce the following waveform
(1) standard lightning impulse voltage full wave, p1.2 / 50uS voltage utilization factor is less than 90%; wave head time 1.2p30% uS. Wave-tail time of 50p20%uS..
(2) Standard steep wave, 2-6/ uS，The overzero coefficient is 0.25-0.35%