Description
VLF (Very Low Frequency) Hipot Testers are suitable for testing power cables, transformers, switchgear, rotating machinery and other electrical apparatus.The VLF sereis only supply AC withstand voltage testing.For buyer's option:1.Tan delta (tgδ test for option), capacitance (μF) and IR (Ω) Test without external device.2."IEE 400.2" Analysis of Tan delta test result.3.Partial discharge testing without external device .4.DC withstandi voltage test,DC leakage current measuremen.-Micro-controller
-Advanced digital frequency technology
-Built-in printer
-Discharge free
-Portable
-60mins Continous working
-CE mark
-Patent
-5th generation AC withstand voltage testing
DC withstand voltage testing
VLF Advantage1.AC Withstand voltage testing, Voltage & current curve display.
2.Tan delta (tgδ test for option), capacitance (μF) and IR (Ω) Test without external device.
3.Partial discharge testing without external device .
4.DC withstandi voltage test,DC leakage current measurement (for buyer's option).
5."IEE 400.2" Analysis of Tan delta test result.
6.Safe Optical isolation technology.
7. Easiest to use Fully automatic microcontroller.8. H/L voltage closed loop negative feedback control circuit, output no capacity rise effect.9. Built-in printer.10. Built-in protective resistors. 11. Colour Touch LCD (154*86mm)operation, True sine wave output.12. Real-time display of actual output waveform. 13. Ergonomic, menu guided, large colour touch screen14. Storage of test results for later retrieval and print. 15. Over voltage and current protected.16.Auto variable frequency 0.1Hz, 0.05Hz, 0.02 Hz, 0.01 Hz.17. 60 mins continuous working;18. Data of current, voltage and waveform directly sampled at HV side.19. Rugged and reliable design less prone to failure from transients.20. Invatation Patent 21. Portable: Control unit + Booster (Tank)22. CE mark.23. RS232 for option.Specification1.Power: 220V ± 10% AC (110V can be customized), 50/60Hz, single phase; 2.Output-Voltage (Peak): 1 to rated value (KV), details see the below table;3.Output frequency: 0.1Hz, 0.05Hz, 0.02 Hz, 0.01 Hz (auto variable frequency);4.Load: 0.5μF (approx 6,000 ft of cable) @ 0.1 Hz 1.0μF (approx 12,000 ft of cable) @ 0.05 Hz 2.5μF (approx 30,000 ft of cable) @ 0.02 Hz 5.0μF (approx 60,000 ft of cable) @ 0.01 Hz 5. Stability of frequency: Fluctuation < 0.5%;6. Measurement accuracy: ±3%;7. Positive and negative voltage peak error: ≤3%; 8. Voltage waveform distortion: ≤5%; 9. Construction: 1 Control unit + 1 Booster (≤60KV set); 1 Control unit + 2 Boosters(≥60KV set).10. Ambient conditions of use: temperature Indoor and outdoor : -10ºC ~ + 50ºC. 11. Humidity:≤85% 12. Technical indexes of VLF tgδ test (for option): 1) tgδ test voltage range: 1 to 40KV (Only one booster can be used for tan delta test if 2 boosters set) 2) Measurement voltage accuracy: 3% 3) Dielectric loss test frequency: 0.1Hz 4) Measurement range: 0.01×10-3- 655.35×10-3 5) Dielectric loss accuracy: 1x10-4 6) Dielectric loss resolution: 1x10-5 7) Capacitance measurement range: 0.001μF-10μF 8) Celectric capacity resolution: 0.001μF 9) Current measurement range: 0-59mA 10) Current resolution: 0.1mA 11) Insulation resistance: 0.01GΩ-65.53GΩ 12) Insulation resistance resolution: 10MΩ13.Main technical indexes of VLF PD test : 1) Partial discharge measurement range: 0.01pc-200pc 2) Partial discharge detection sensitivity: 0.01pc 3) Capacitance range: 0.001μF-10μF 4) Sampling bits: 12 bits 5) Sampling speed: 12M/S 6) Test voltage: 0 to rated value (KV)14.DC leakage current measurement (for option): 1) Output rated voltage: same as rated AC voltage output 2) Voltage accuracy: 3% 3) Leakage current range: 0-2000μA 4) DC Current resolution: 1μA 5) DC current accuracy: 3% 6) It is necessary to parallel the capacitor we supplied if testing DC leakage current.
Model no | Output
Voltage/
Current
(Peak) | Load Capacity | Control Unit | Booster(Tank) | Power |
Capacitance/
Freuency | Net Dim.
(cm) | Net Wt
(kg) | Net Dim.
(cm) | Net Wt
(kg) |
| VLF-30 | 30KV/20mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤10µF | 40×31×20 | 6 | 29x15×35 | 25 | 1000W |
| VLF-40 | 40KV/20mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤10µF | 40×31×20 | 6 | 29x15×35 | 25 | 1200W |
| VLF-50 | 50KV/30mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤10µF | 40×31×20 | 6 | 45×19×36 | 45 | 1500W |
| VLF-60 | 60KV/59mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤5µF at 60KV; | 40×31×20 | 6 | 45×19×36
| 45 | 2000W |
| VLF-70 | 70KV/59mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤5µF at 70KV;
Capacity:≤10µF for single booster (30/40KV) |
40×31×20
| 6 | 29x15×35 | 25 | 2500W |
| 36x19×45 | 45 |
| VLF-80 | 80KV/59mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤5µF at 80KV;
Capacity:≤10µF for single
booster (30/50KV) | 40×31×20
| 6 | 29x15×35 | 25 | 3000W |
| 36x19×45 | 45 |
| VLF-90 | 90KV/59mA | 0.1Hz-0.01Hz
Auto Variable
Capacity:≤5µF at 90KV;
Capacity:≤10µF for single
booster (40/50KV) | 40×31×20 | 6 | 29x15×35 | 25 | 3500W |
| 36x19×45 | 45 |
Field connection diagram (Test object: cable)
True LCD screenshoot test resultsPackage for transport : 1) 30KV/40KV test set:
| Sr no | Name of Commodity | Qty | N.W | G.W | Transport size
(LxWxH) |
1
| Controller | 1 unit | 5 kg |
52 kg |
450x380x800mm |
| Capacitor 0.04µF | 1 unit | 5 kg |
| Booster I (30/40KV) | 1 unit | 25 kg |
| Aluminum alloy box | 1 unit | 5kg |
| Total: | 1 set | 40 kg | 52 kg | 0.14 m3 |
| Packed in 1 wooden case. |
2) 50KV/60KV test set:
| Sr no | Name of Commodity | Qty | N.W | G.W | Transport size
(LxWxH) |
1
| Controller | 1 unit | 5 kg |
80 kg |
470x430x950mm |
| Capacitor 0.04µF | 1 unit | 5 kg |
| Booster I (50/60KV) | 1 unit | 45 kg |
| Aluminum alloy box | 1 unit | 5kg |
| Total: | 1 set | 60 kg | 80 kg | 0.19 m3 |
| Packed in 1 wooden case. |
2) 70KV/80KV test set:
| Sr no | Name of Commodity | Qty | N.W | G.W | Transport size
(LxWxH) |
1
| Controller | 1 unit | 5 kg |
52 kg |
450x380x800mm |
| Capacitor 0.04µF | 1 unit | 5 kg |
| Booster I (30/40KV) | 1 unit | 25 kg |
| Aluminum alloy box | 1 unit | 5kg |
| 2 | Booster II (40/50KV) | 1 unit | 45 kg | 69 kg | 470x430x720mm |
| Aluminum alloy box | 1 unit | 6 kg |
| |
| Total: | 1 set | 91 kg | 121 kg | 0.29 m3 |
| Packed in 2 wooden cases. |
Accessories| Sr no. | Description | Quantity | Remarks |
| 1 | Control unit | 1 | unit | |
| 2 | Booster I (Tank I) | 1 | unit | 1 Booster if ≤60KV set;
2 boosters for ≥70KV set. |
| Booster II (Tank II) | 1 | unit |
| 3 | Capacitor (0.04µF) | 1 | unit | Used as Capacity supplement, or test object for demo |
| 4 | Discharge rod | 1 | unit | |
| 5 | HV Test/Connection cables | 1 | set | |
| 6 | Earth cable | 1 | unit | |
| 7 | Power supply cable | 1 | unit | |
| 8 | Fuse | 2 | units | |
| 9 | Printer paper | 1 | unit | |
| 10 | Operating manual | 1 | unit | |
| 11 | Aluminium alloy box | 1 | unit | 1 aluminium alloy box ≤60KV set;
2 aluminium alloy boxes ≥70KV set. |
| 1 | unit |
| 12 | Calibration report | 1 | unit | |
Complaint
