GDVLF-40/1.1 Ultra-Low Frequency Motor Withstand Voltage Tester
Darui Electric recommends:
The GDVLF-40 ultra-low frequency motor withstand voltage tester is mainly designed and manufactured for non-destructive insulation withstand voltage tests of cables, motors, etc. with voltage levels of 35kV and below.
Mainly used for plastic power cables such as PE (polyethylene) / XLPE (cross-linked polyethylene) with voltage levels of 35kV and below. Suitable for power departments and power cable maintenance departments. It incorporates modern digital frequency conversion advanced technology, adopts microcomputer control, and fully automates voltage boosting, voltage reduction, measurement, and protection. Due to full electronization, it is small in size and light in weight, with a large-screen LCD display that is clear and intuitive, and can display output waveforms and print test reports.
◆ Current, voltage, and waveform data are all directly sampled 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 no external protection resistor is needed;
◆ 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: 0.1Hz ultra-low frequency withstand voltage test will not cause significant damage to insulation like DC withstand voltage test, and harmful polarized charges will not enter the dielectric.
◆ Advanced technology: adopts power electronic components, microcomputer control, safe and simple, convenient operation, and reliable data.
| Model |
Peak Voltage |
Measurement Range |
Weight |
Application |
| GDVLF-30/1.1 |
30kV |
- At 0.1Hz ≤1.1μF
- At 0.05Hz ≤2.2μF
- At 0.02Hz ≤5.5μF
|
Controller: 4kg
Booster: 25kg |
Cables, motors, etc. with voltage of 10kV and below |
| GDVLF-40/1.1 |
40kV |
- At 0.1Hz ≤1.1μF
- At 0.05Hz ≤2.2μF
- At 0.02Hz ≤5.5μF
|
Controller: 5kg
Booster: 25kg |
Cables, generators, etc. with voltage of 13.8kV and below |
| GDVLF-50/1.1 |
50kV |
- At 0.1Hz ≤1.1μF
- At 0.05Hz ≤2.2μF
- At 0.02Hz ≤5.5μF
|
Controller: 6kg
Booster: 25kg |
Cables, generators, etc. with voltage of 15.75kV and below |
| GDVLF-60/1.1 |
60kV |
- At 0.1Hz ≤1.1μF
- At 0.05Hz ≤2.2μF
- At 0.02Hz ≤5.5μF
|
Controller: 6kg
Booster: 45kg |
Cables, generators, etc. with voltage of 18kV and below |
| GDVLF-80/0.5 |
80kV |
- At 0.1Hz ≤1.1μF
- At 0.05Hz ≤2.2μF
- At 0.02Hz ≤5.5μF
|
Controller: 7kg
Two boosters: 65kg |
Cables, generators, etc. with voltage of 35kV and below |
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
