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Product Details:
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| Test Principle:: | Very-low Frequency Technology Principle | Usage: | 0.1Hz Withstand Voltage Test For 35KV And Below MV Power Cable And Generator |
|---|---|---|---|
| Design Feature: | Two HV Boosters, 30KV/50KV For Single One | Component: | Controller，HV Booster，Compensation Capacitor Load |
| Test Frequency: | 0.1Hz, 0.05Hz, 0.02Hz | Max.Test Voltage: | 0~ 80KV(peak), Continuously Adjustable |
| Load Range:: | 0.1Hz, ≤0.5μF ; 0.05HZ,≤0.1μF ;0.02HZ ≤2.5μF | Test Accuracy: | No Less Than 3% |
| Output Waveform: | Good Sine Wave,Voltage, Waveform Distortion ≤ 5% | HV Booster Using Way: | Single Or In Series Connection |
| Duty Cycle: | 60mints | ||
| Highlight: | high voltage vlf hipot instruments,vlf cable testing equipment |
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80KV Very Low Frequency High Voltage Test Set For Cable And Generator , AC High Voltage Testing
I. Product Description Of VLF Test Technology :
Withstand voltage test is an essential preventive test for electrical equipment. It is divided into two parts: AC and DC withstand voltage test. AC test technology principle can be further divided into power frequency, variable frequency (VF)and 0.1Hz very low frequency test(VLF), among which the last one is highly recommended by IEC, due to its remarkable advantages under 50KV test voltage.
II. Technogy feature advantage at DC test /power frequency test/VF test/ VLF test
| Aspects | DC | Power Frequency | Variable Frequency | 0.1Hz VLF |
| Equivalency | Poor | Good | Good | Good |
| Insulation Damage | strong | slight | slight | slight |
| Operation Safety | relatively low | relatively low | relatively low | high |
| Wiring Difficulty | complicated | complicated | most complicated | simple |
| Volume | smallest | largest | large | small |
See from the above table , VLF test is the substitute for power frequency test. It is suitable for testing electrical equipment with large capacitance.
III. Product advantage and Feaure
IV. General Technical data:
Remarks: Capacitance of test object can not be larger than the maximum value of the test instrument. If capacitance of test object is smaller than 0.05μF, the hipot should be equipped with an auxiliary device (supplied by HV HIPOT at your option).
V. Other typical model
| Model | Voltage range | Test Frequency | Maximum load |
| VLF-30KV/0.1Hz | 0~ 30KV | 0.1HZ, 0.05HZ, 0.02HZ | 5.5μF |
| VLF-40KV/0.1Hz | 0~ 40KV | 0.1HZ, 0.05HZ, 0.02HZ | 5.5μF |
| VLF-50KV/0.1Hz | 0~ 50KV | 0.1HZ, 0.05HZ, 0.02HZ | 5.5μF |
| VLF-80KV/0.1Hz | 0~ 80KV | 0.1HZ, 0.05HZ, 0.02HZ | 2.5μF |
| Special requirement can be made by order | |||
VI.Test Voltage standard by this test set
1 For MV and below class XLPE cable:
Test peak voltage formula: Ｕmax＝3Ｕ0,
Ｕ0＝Single-phase rated voltage of cable
Test time :60mints
2 For generator stator
Ｕtest＝1.414*βKＵ0,
Utest---- 0.1Hz peak test voltage (kV);
β-------0.1Hz and 50Hz voltage equivalent factor, usually taking 1.2;
K------ Usually take 1.3 to 1.5, generally take 1.5;
Uo----- Generator stator windings rated voltage (kV);:
Contact Person: Sales Manager
Tel: +8613707144739
