VLF (Very Low Frequency) Hipot Testers are suitable for testing power cables, transformers, switchgear, rotating machinery and other electrical apparatus.
For buyer's option:
1.Tan dleta (tgδ) test + Capacity(μF) + IR(Ω)
2."IEE 400.2" Analysis of Tan delta test result
3.Partial discharge PD(pc) testing
4.DC withstand voltage test (leakage current display)
-Micro-controller
-Advanced digital frequency technology
-Built-in printer
-Discharge free
-Portable
-60mins Continous working
-CE mark
-Patent
-5th generation
VLF Advantage
1.AC Withstand voltage testing, Voltage & current curve display.
2.Tan delta (tgδ test), capacitance (μF) and IR (ohm) Test without external device.
3.Partial discharge testing without external device (for buyer's option).
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 screen
14. Storage of test results 99 groups 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. IP67 waterproof rugged and reliable design.
20. Invatation Patent
21. Portable: only one unit for 30KV/40KV/50KV/60KV, 2 units for 80KV (Control unit + Tank).
22. CE mark.
23. RS232/USB (for buyer's option).
Specification
1.Power: 220V ± 10% AC (110V can be customized), 50/60Hz, single phase;
2.Output-Voltage (Peak): 1 to rated value (KV);
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: only one unit for 40KV; 2 units for 80KV(1 Control unit +1 Tank).
10. Ambient conditions of use: temperature Indoor and outdoor : -10ºC ~ + 50ºC.
11. Humidity:≤85%
Model no |
Output
Voltage
(AC/DC) |
Output current |
Load Capacity |
Fuse |
Structure |
Capacitance/
Frequency |
| |
| VLF-30TD |
1~30KV |
AC: 20mA
DC: 2000μA |
Auto/manual Frequency:0.1Hz-0.01Hz
Capacity≤10µF
(1.0µF@0.1Hz/30KV) |
10A |
Integrated device:35kg
1 Capacior: 3kg |
| VLF-40TD |
1~40KV |
AC: 20mA
DC: 2000μA |
Auto/manual
Frequency:0.1Hz-0.01Hz
Capacity≤10µF
(1.0µF@0.1Hz/40KV) |
15A |
Integrated device:35kg
1 Capacior: 3kg |
| VLF-50TD |
1~50KV |
AC: 30mA
DC: 2000μA |
Auto/manual Frequency:0.1Hz-0.01Hz
Capacity≤10µF
(1.0µF@0.1Hz/50KV) |
20A |
Integrated device:40kg
1 Capacior: 4.2kg |
| VLF-60TD |
1~60KV |
AC: 59mA
DC: 2000μA |
Auto/manual Frequency:0.1Hz-0.01Hz
Capacity≤5µF
(0.5µF@0.1Hz/60KV) |
20A |
Integrated device:40kg
1 Capacior: 4.2kg |
| VLF-70TD |
1~70KV |
AC: 59mA
DC: 2000μA |
Auto/manual Frequency:0.1Hz-0.01Hz
Capacity≤5µF at 70KV;
≤10µF at 50KV
(0.5µF@0.1Hz/70KV) |
30A |
Control part:35kg
(Controller+1*30KV tank)
1*40KV tank: 45kg
1 Capacior: 4.2kg |
| VLF-80TD |
1~80KV |
AC: 59mA
DC: 2000μA |
Auto/manual Frequency:0.1Hz-0.01Hz
Capacity≤4µF at 80KV
≤10µF at 50KV
(0.4µF@0.1Hz/80KV) |
30A |
Control part:35kg
(Controller+1*40KV tank)
1*40KV tank: 45kg
1 Capacior: 4.2kg |
| Note: DC leakage current measurement for buyer's option. |
12. Technical indexes of VLF tgδ test:
1) tgδ test voltage range: 1 to 40KV;
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: 10MΩ
Analysis of Tan delta test results (IEE400.2)
13.Main technical indexes of VLF PD test (for option):
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.
Field connection diagram
It gives 80KV output when external connecting 40KV tank.
Package for transport
1) 40KV test set:
| Sr no |
Name of Commodity |
Qty |
N.W |
G.W |
Transport size
(LxWxH) |
| 1 |
40KV test set
Including 1 capacitor and 1 wires case |
1 unit |
46 kg |
80 kg |
580x400x500mm |
| Total: |
1 set |
46 kg |
80 kg |
0.19 m3 |
| Packed in 1 wooden case. |
2) 80KV test set:
| Sr no |
Name of Commodity |
Qty |
N.W |
G.W |
Transport size
(LxWxH) |
| 1 |
Controll part |
1 unit |
45 kg |
50 kg |
550x400x500mm |
| 2 |
Tank |
1 unit |
45 kg |
69 kg |
470x430x720mm |
| Capacitor |
1 unit |
4 kg |
| Aluminum alloy box |
1 unit |
6 kg |
| |
| Total: |
1 set |
90 kg |
119 kg |
0.26 m3 |
| Packed in 2 wooden cases. |
Accessories
| Sr no. |
Description |
Quantity |
Remarks |
| 1 |
Control part |
1 |
unit |
|
| 2 |
Booster (Tank) |
1 |
unit |
No external tank for 30KV,40KV,50KV, 60KV |
| 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 |
|
| 12 |
Calibration report |
1 |
unit |
|
Audited Supplier 
Audited Supplier 
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