VLF AC Hipot Series
0-40 kVAC and 100 kVACModels With variable frequency 0.01 to 0.1Hz, output.
Description :
AT LAST : The portable VLF AC Testing Solution for XLPE. PE & EPR Cables
The Jupiter Instruments India, Very Low Frequency (VLF) series of AC Hipots finally enables utilities and industry to economically AC field test cables and electrical apparatus instead of DC testing.
WHAT IS VLF?
A VLF unit s and AC hipot with a 0.1 Hz of lower output frequency, used for AC testing high capacitance loads. At 0.1 Hz, 600 times less power than at 50 Hz. A VLF test is a go/no-go stress test. The load either holds the test voltage or break down. It is the surest and easiest way to expose defects in cables and generators.
WHY VLF HIPOT?
"Because DC testing can be harmful to cables and deleteriously cause faults within the solid dielectric insulation of cables!" VLF testing exposes cables defects while not harming good insulation.
VLF AC Hipot Series (100 kV VLF Model Also available)
Some Benefits of JUPITER VLF-AC Hipots :
- Smallest, lightest weight AC-VLF Hipot available with the largest test load ratings.
- Two-piece portability
- Simple and easy operation
- 230 Vac, 50/60 Hz, Input line required
- The VLF AC hipot does NOT generate harmful voids in the Insulation through treeing.
- Harmful space changes dose not generated during testing .
- A true-sinusoidal output voltage waveform is used
- No traveling waves are generated during testing
- Waveshape independent of capacitive loading between 0.01 and maximum load.
Additional test applications :
- Rotating machinery-IEEE-433
- Capacitors
- Full Real Cable
- Bushings & Insulators
- Transformers
Need more information on VLF
- For more information on our VLF products and VLF testing, please contact us.
Model JLF 40 & JLF 60 are continuously adjustable 0-40 kilovolt and 0-60 kilovolt AC hipots with a 0.1 Hz sinusoldal output. The wave shape is independent of capacitive loading and can test cables upto 20 Km in length. The units are portable and operate from a conventional 230 volt electrical service.
The test sets depending on model, consists of control and HV Section interconnecting and output cables, Cushion Grip carrying handles fa ciliate transport by one or two men. Operator skill is not require.
Controls are elementary Power ON switch, HV ON, Motorized KV increase & decrease and a single range 40 KV / 60 KV peak kilo voltmeter. The unit is continuous duty operation.
A VLF test can detect cable defects at a much lower voltage than a DC Hi-pot / Proof test. Also, voltage transients are much smaller with a VLF AC Hipot test during cable failure or flashover than with a DC Hipot / Proof Test. No travelling waves are generated with VLF during testing.
The VLF AC Hipot also bums, breaks-down and conditions a cable fault much quicker than conventional DC bumers. Therefore, fault locating time is reduced with existing thumper/rader devices.
SPECIFICATIONS VLF-40 (40kV, 10µF)
Input :
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230V, 50/60Hz, 10A.
|
Output Voltage and Frequency :
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Sinusoidal, 0-40 kVAC peak 0.01 to 0.1Hz
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Load Rating :
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10µF
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Duty :
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Continuous
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Kilovoltmenter :
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4" deflection 40-0-40 kVAC Peak
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Charging Current meter :
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As per requirement
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Modes :
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VLF AC & DC Mode
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Weight :
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50Kg. Approx.
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HV Output Cable :
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10 Mtr. with Crocodile Clamp.
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Interconnect Cable length :
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4 Mtr. with sockets
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Shorting Stick
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2 Mtr., 2 Mtr. Lead with Clamp
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SPECIFICATION JLF 60 (60 kV, 10µF)
Input :
|
230V, 50/60Hz, AC.
|
Output Voltage and Frequency :
|
Sinusoidal, 0-60 kVAC peak 0.01 to 0.1Hz
|
Load Rating :
|
10µF
|
Duty :
|
Continuous
|
Kilovoltmenter :
|
4" deflection 60-0-60 kVAC Peak
|
Charging Current meter :
|
As per requirement
|
Modes :
|
VLF AC & DC Mode
|
Weight :
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90Kg. Approx.
|
HV Output Cable :
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20 Mtr. with Crocodile Clamp.
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Interconnect Cable length :
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4 Mtr. with sockets
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Shorting Stick
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3 Mtr., 3 Mtr. Lead with Clamp
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