VLF Advantage
1. AC/DC Withstand voltage testing.
2. Tan delta (tgδ test), capacitance (μF) and IR (Ω) Test without external device.
3. Partial discharge testing without external device (for buyer’s option).
4. Safe Optical isolation technology.
5. Easiest to use Fully automatic microcontroller.
6. H/L voltage closed loop negative feedback control circuit, output no capacity rise effect.
7. Built-in printer.
8. Built-in protective resistors.
9. Colour Touch LCD operation, True sine wave output.
10. Real-time display of actual output waveform.
11. Ergonomic, menu guided, large colour touch screen
12. Storage of test results for later retrieval and print.
13. Over voltage and current protected.
14. Variable frequency 0.1Hz, 0.05Hz, 0.02 Hz, 0.01 Hz (auto variable frequency).
15. 60 mins continuous working;
16. Data of current, voltage and waveform directly sampled at HV side.
17. AC voltage & current curve display; DC voltage curve display.
18. Harmful space charges are not injected into the cable insulation.
19. No traveling waves are generated during testing.
20. Rugged and reliable design less prone to failure from transients.
21. Invatation Patent
22. Portable: Control unit + Booster (Tank)
23. CE mark.
24.” IEE 400.2” Analysis software of Tan delta test result (for buyer’s option).
Specification
1.Power: 220V ± 10% AC (110V can be customized), 50/60Hz, single phase;
2.Output-Voltage (Peak): 0 to rated value (30 KV);
3.Output frequency: 0.1Hz, 0.05Hz, 0.02 Hz, 0.01 Hz (auto variable frequency);
4. Stability of frequency: Fluctuation < 0.5%;
5. Measurement accuracy: ±3%;
6. Positive and negative voltage peak error: ≤3%;
7. Voltage waveform distortion: ≤5%;
8. Construction: 1 Control unit + 1 Booster;
9. Ambient conditions of use: temperature Indoor and outdoor : -10ºC ～ + 50ºC.
10. Humidity:≤85%
11. Technical indexes of VLF dielectric loss (tgδ test):
1) Test voltage range: 0 to rated value (KV)
2) Dielectric loss test frequency: 0.1Hz
3) Measurement range: 0.01×10-3- 5000.00×10-3
4) Dielectric loss resolution: 1x10-4
5) Dielectric loss resolution: 1x10-5
6) Capacitance measurement range: 0.01μF-10μF
7) Celectric capacity resolution: 0.01μF
8) Current measurement range: 0–59mA
9) Insulation resistance: 1MΩ-25122MΩ (25.122GΩ)
10) Insulation resistance resolution: 1MΩ
The following “VLF-T” series supply AC/DC withstand voltage testing + tgδ test + Capacity(μF) + IR(Ω):
|
Model no
|
Output
Voltage/
Current
(Peak)
|
Load Capacity
|
Control Unit
|
Booster
|
Power
|
|
Capacitance/
Freuency
|
Net Dim.
(cm)
|
Net Wt
(kg)
|
Net Dim.
(cm)
|
Net Wt
(kg)
|
|
VLF-30T
|
30KV/20mA
|
0.1Hz-0.01Hz
Capacity:≤10µF
Auto Variable
|
40×24×31
|
6
|
34×16×30
|
25
|
1000W
|
|
VLF-40T
|
40KV/20mA
|
0.1Hz-0.01Hz
Capacity:≤10µF
Auto Variable
|
40×24×31
|
6
|
44×18×37
|
40
|
1200W
|
|
VLF-50T
|
50KV/30mA
|
0.1Hz-0.01Hz
Capacity:≤10µF
Auto Variable
|
40×24×31
|
6
|
44×19×37
|
45
|
1500W
|
|
VLF-60T
|
60KV/59mA
|
0.1Hz-0.01Hz
Capacity:≤5µF
Auto Variable
|
40×24×31
|
6
|
45×20×38
34×16×30
|
45+25
|
2000W
|
|
VLF-70T
|
70KV/59mA
|
0.1Hz-0.01Hz
Capacity:≤5µF
Auto Variable
|
40×24×31
|
6
|
45×20×38
34×16×30
|
45+25
|
2500W
|
|
VLF-80T
|
80KV/59mA
|
0.1Hz-0.01Hz
Capacity:≤5µF
Auto Variable
|
40×24×31
|
6
|
45×20×38
34×16×30
|
45+25
|
3000W
|
|
VLF-90T
|
90KV/59mA
|
0.1Hz-0.01Hz
Capacity:≤5µF
Auto Variable
|
40×24×31
|
6
|
46×22×38
45×20×38
|
45+30
|
3500W
|
|
VLF-100T
|
100KV/59mA
|
0.1Hz-0.01Hz
Capacity:≤5µF
Auto Variable
|
40×24×31
|
6
|
50×25×40
45×20×38
|
45+45
|
4000W
|
Analysis software of Tan delta test results (IEE400.2)
Field connection diagram (Test object: cable)
Package for transport :
|
Sr no
|
Name of Commodity
|
Qty
|
N.W
|
G.W
|
Transport size
(LxWxH)
|
|
1
|
Controller
|
1 unit
|
5 kg
|
55 kg
|
450x490x950mm
|
|
Capacitor 0.04µF
|
1 unit
|
5 kg
|
|
Booster (Tank)
|
1 unit
|
25 kg
|
|
Aluminum alloy box
|
1 unit
|
5kg
|
|
Packed in 1 wooden case.
|
Accessories
|
Sr no.
|
Description
|
Quantity
|
Remarks
|
|
1
|
Control unit
|
1
|
unit
|
|
|
2
|
Booster (50KV Tank )
|
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
|
|
|
|
|
0.1Hz VLF AC/DC Hipot tester
