VLF Multi-Function Hipot Tester Product Introduction This product utilizes digital frequency conversion technology and is controlled by a microcontroller, fully automating voltage boost, buck, measurement, and protection. Due to its fully electronic nature, it is small in size and light in weight. It features a large, color touchscreen display that is clear, intuitive, and easy to operate, displaying the output waveform. Key features are as follows: 1.1.1 Ultra-low frequency circuits with a rated voltage of 60kV or less adopt an integrated structure; ultra-low frequency circuits with a rated voltage greater than 60kV adopt an integrated unit connected in series with a step-up transformer, which greatly reduces the overall weight, enhances the load-carrying capacity, and achieves multiple uses in one unit. Operation is extremely simple. 1.1.2 Current and voltage data are directly sampled from the high-voltage side. Due to the use of a closed-loop negative feedback control circuit, there is no capacitive rise effect in the output. 1.1.3 Intelligent Integrated Protection Function: Without needing to set current and voltage protection values, the instrument can calculate overvoltage and overcurrent protection values based on the sample capacitance and test voltage. It can trigger protection shutdown for overvoltage, overcurrent, low resistance faults in the sample, and flashover. Major Technical Indicators 1.3.1 Rated output voltage: 30kV-80kV. See Table 1 for specifications. 1.3.2 Output Frequency: Automatic frequency conversion range : 0.1 Flz - 0.01 Flz 1.3.3 Load capacity: See Table 1 1.3.8 Voltage positive and negative peak error: <3% 1.3.9 Voltage waveform distortion: <3% 1.3.10 Operating conditions: Indoor and outdoor; 1.3.11 Input power: 50Hz frequency , 230V ± 5% voltage ( or 60Flz frequency , 120V ± 5% voltage ). 1.3.12 It has a grounding detection function; voltage boosting will be disabled if grounding is not enabled . # Main Technical Specifications # Localized output measurement range: O-IOOOOpc # Local Amplification Resolution: Ipc # Sampling data bit depth: 12 bits # Displays the instantaneous and peak values of partial discharge. # Discharge pulse frequency: 1 KFfz-2000KFIz # Evaluation method of sample quality using partial emission level : # The data measured by this instrument should be understood as a relative quantity reflecting the strength of the cable discharge. The discharge intensity is divided into 10,000 equal parts. A value less than 10 indicates no discharge; 10-100 indicates a slight discharge; and a value greater than 100 indicates a large discharge, rendering the cable unqualified. This method of judgment is based on empirical values derived from extensive experimental data; do not apply the data measured by this instrument to other relevant standards.