The VLF testers (Generator) are suitable for
testing cables, transformers, switchgear,
rotating machinery, and other
electrical apparatus.
VLF ADVANTAGES:
· Easiest to use Fully automatic microcontroller
· Built-in printer
· True sine wave output
· Real-time display of actual output waveform
· Ergonomic, menu guided, large backlit LCD
· Storage of test results for later retrieval and print.
· Over voltage and current protected
· Variable frequency 0.1Hz, 0.05Hz, 0.02 Hz
· Data of current, voltage and waveform directly sampled at HV side.
· AC testing does not degrade good cable insulation
· Harmful space charges are not injected into the cable insulation
· No traveling waves are generated during testing
· Rugged and reliable design less prone to failure from transients
Load Ratings
SPECIFICATIONS
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Input
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220 ± 10% Volts AC, 50 Hz
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Output-Voltage AC
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30kV
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Output frequency
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0.1Hz, 0.05Hz, 0.02Hz.
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Stability of frequency
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Fluctuation < 0.5%
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Measurement accuracy
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±3%.
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Positive and negative voltage peak errors
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≤3%.
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Voltage waveform distortion
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≤5%
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Protection
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Mains fuse.
Over voltage protection.
Over current protection.
Protective HV resistor connected inside.
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Construction
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temperature Indoor and outdoor : -10C
to + 40ºC.
Humidity:≤85%
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Ambient conditions of use
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1) Cable for mains supply: 1 number.
2) Interconnecting cable: 1 number.
3) H.V. Test lead: 1 pair.
4) Discharge rod: 1 number.
5) Operating manual: 1 number.
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Load Ratings
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Type no.
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Frequency/Capacity
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Rated Test Voltage/Current/Capacitance
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VLF-30/1.1
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0.1 Hz, ≤1.1µF
0.05Hz, ≤2.2µF
0.02Hz, ≤5.5µF
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30kV/20mA
Test capacity:Up to10KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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VLF-40/1.1
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0.1 Hz, ≤1.1µF
0.05Hz, ≤2.2µF
0.02Hz, ≤5.5µF
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40KV/ 25mA
Test capacity:up to 13.8KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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VLF-50/1.1
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0.1 Hz, ≤1.1µF
0.05Hz, ≤2.2µF
0.02Hz, ≤5.5µF
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50KV/30mA
Test capacity: 15.75KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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VLF-60/1.1
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0.1 Hz, ≤1.1µF
0.05Hz, ≤2.2µF
0.02Hz, ≤5.5µF
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60KV/37mA
Test capacity:18KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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VLF-70/0.5
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0.1 Hz, ≤0.5µF
0.05Hz, ≤1.0µF
0.02Hz, ≤2.5µF
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70KV/40mA
Test capacity:25KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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VLF-80/0.5
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0.1 Hz, ≤0.5µF
0.05Hz, ≤1.0µF
0.02Hz, ≤2.5µF
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80kV/50mA
Test capacity:up to 35KV cable or generator
0.1Hz@1.1uF: up to 5KM of cable.
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