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 electronic design, 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 directly sampled from the high-voltage side, ensuring accurate data;
◆ Overvoltage protection function: when the output exceeds the set voltage limit, the instrument will shut down for protection, with an action time of less than 20ms;
◆ Overcurrent protection function: designed with dual protection on both high and low voltage sides. 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 activated, with action times both 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 circuits, there is no capacitive rise effect in the output.
◆ Good equivalence: scientific theory and practice have proven that 0.1Hz ultra-low frequency withstand voltage tests have good equivalence with power frequency withstand voltage tests.
◆ Small size: theoretically, the capacity is 1/500 of that at power frequency, so it is small in size and light in weight.
◆ Low destructiveness: 0.1Hz ultra-low frequency withstand voltage tests do not cause significant damage to insulation like DC withstand voltage tests, and harmful polarization charges do not enter the dielectric.
◆ Advanced technology: uses power electronic components, microcomputer control, safe and simple, easy to operate, and reliable data.
| Model | Peak Voltage | Measurement Range | Weight | Application |
| GDVLF-30/1.1 | 30kV |
|
Controller: 4kg Booster: 25kg |
For cables, motors, etc. with voltage levels of 10kV and below |
| GDVLF-40/1.1 | 40kV |
|
Controller: 5kg Booster: 25kg |
For cables, generators, etc. with voltage levels of 13.8kV and below |
| GDVLF-50/1.1 | 50kV |
|
Controller: 6kg Booster: 25kg |
For cables, generators, etc. with voltage levels of 15.75kV and below |
| GDVLF-60/1.1 | 60kV |
|
Controller: 6kg Booster: 45kg |
For cables, generators, etc. with voltage levels of 18kV and below |
| GDVLF-80/0.5 | 80kV |
|
Controller: 7kg Two boosters: 65kg |
For cables, generators, etc. with voltage levels of 35kV and below |
