Product Details

  HTDP-H Ultra-Low Frequency Insulation Withstand Voltage Test Device | Ultra-Low Frequency Insulation Withstand Voltage Test Device is the core product independently developed by our company，It overcomes the many shortcomings of the first-generation mechanical products, and its cost performance is far higher than similar imported products. It is especially suitable for withstand voltage tests on electrical equipment with large equivalent insulation capacitance (such as power cables, power capacitors, large and medium-sized generators and motors, etc.), and meets the requirements of the newly promulgated national electric power industry standard "General Technical Conditions for Ultra-Low Frequency High Voltage Generators DL/T849.4-2004" in 2004.

Product Features:

  ◆ Current, voltage, and waveform data are all sampled directly from the high-voltage side, so the data is accurate;

  ◆ It has overvoltage protection function. When the output exceeds the set voltage limit, the instrument will stop for protection, with an action time of less than 20ms;

  ◆ It has overcurrent protection function: designed as dual protection for high and low voltage. The high-voltage side can perform precise shutdown protection according to the set value; when the current on the low-voltage side exceeds the rated current, shutdown protection will be performed, with an action time of less than 20ms;

  ◆ The high-voltage output protection resistor is designed inside the booster, so there is no need to connect an external protection resistor;

  ◆ Due to the adoption of high and low voltage closed-loop negative feedback control circuit, the output has no capacitive rise effect.

  ◆ Good equivalence: Scientific theory and practice have proven that 0.1Hz ultra-low frequency withstand voltage test has good equivalence with power frequency withstand voltage test. 

  ◆ Small size: Theoretically, the capacity is 1/500 of power frequency, so it is small in size and light in weight.  

  ◆ Low destructiveness: The 0.1Hz ultra-low frequency withstand voltage test will not cause great damage to insulation like DC withstand voltage test, and harmful polarized charges will not enter the dielectric.  

  ◆ Advanced technology: It adopts power electronic components, microcomputer control, safe and simple, convenient operation, and reliable data.

Product Parameters:

 

  ◆ Output frequency: 0.1Hz, 0.05Hz, 0.02Hz;

  ◆ Load capacity: 0.1 Hz   max 0.5μF  

               0.05 Hz  max 1.0μF  

               0.02 Hz  max 2.5μF;

  ◆ Measurement accuracy: 3%;

  ◆ Voltage positive and negative peak error: ≤3%;

  ◆ Voltage waveform distortion: ≤5%;

  ◆ Operating conditions: indoor and outdoor; temperature: -10℃∽+40℃; humidity: ≤85% RH;

  ◆ Power supply: AC 50 Hz, 220V ±5%;



Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.