Active Member
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[China]
Address: Layers Building 2,N0.2-2 Guannan Science&Technology Industrial Park, East Lake High-Tech Development Zone,Wuhan ,China
Contact name:Jianbin Cao
WUHAN FANKE HAIWO HIGH VOLTAGE TECHNOLOGY CO.,LTD. |
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90KV Very Low Frequency High Voltage Test Set For Cable And Generator , AC High Voltage Testing
I. Product Description :
This test set model VLF-90KV/0.1Hz is designed to perform on-site withstand voltage test with very-low frequency technology for power generators or 45KV and below XLPE power cable.Compared with Hipot test set at main power frequency, VLF HV Test Set just needs much small test power capacity(About 1/500 in theory). Its size and weight also is decreased greatly. Specially the appearance of surveillance can discover the generator insulation abnormal phenomena such as surface corona, discharge and so on.
Based on electronic frequency conversion and microprocessor
controlled technology, Model VLF-90KV/0.1Hz has excellent performance.
It is prohibited to boost voltage without load, or to connect with
resistive load. If the specimen capacitance is less than 0.05uF,
the test set output waveform will be bad. For better performance,
optional capacitor is necessary to connect.
Until now , the designed test set also forms many different serialized model according to different withstand test applications through HV booster number of configurations in each set, The alike model can see other typical model at following clause.
II. Supply list of this set:
| Sn | Description | Quantity
| |
| 1 | Control unit | 1 | unit |
2 | 50KV HV Booster | 1 | unit |
| 40KV HV Booster | 1 | unit | |
| 3 | Discharging rod | 1 | unit |
| 4 | Load Capacitor, 0.04µF | 1 | unit |
| 5 | HV Test/Connection Cables | 1 | set |
| 6 | Earth cable | 1 | unit |
| 7 | 20A Fuse | 5 | unit |
| 8 | Print paper | 2 | unit |
| 9 | Manual | 1 | unit |
| 10 | Factory test report | 1 | unit |
III. Product Feature :
IV. General Technical data:
V. Measuring and control software panel :
VI.Test Connection Figure
1. For XLPE cable under 90KV test voltage
2. For Generator stator under 50KV test voltage
VII. 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 | |||
VIII.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);:
