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High Accuracy VLF High Voltage Testing 60KV High Voltage Vlf Hipot Instruments

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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.

High Accuracy VLF High Voltage Testing 60KV High Voltage Vlf Hipot Instruments

Country/Region china
City & Province wuhan hubei
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Product Details

60KV Very Low Frequency Test Set For Cable , VLF Cable Tester , HV Test , Generator Insulation

 

I. Application :

 

Model VLF-60KV/0.1Hz is designed to perform on-site withstand voltage test with very-low frequency test frequency for power generators or 35KV 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.

 

VLF hipot tester combines modern advanced digital variable frequency technology and micro computer control together, therefore, it can realize the full automatic voltage boost, stepdown, measurement and protection as well as the manual intervention in the process of automatic voltage boost. The full electronic design ensures the small size and light weight. The big LCD screen ensures the clear and visual display, and can display the output wave form. The printer outputs test reports

 

The test set  consists of a control box, one HV boosters, a compensation capacitor and a discharge rod.Based on electronic frequency conversion and microprocessor controlled technology, it has excellent performance on cable or generator testing.


 

II. Supply list of this Model:

 

Sn

Description

Qty.

1

Control unit

1

unit

2

60KV 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. Technical Feature
  • The data is accurate because that current, voltage, waveform data are sampled directly from the high voltage side;
  • It has overvoltage protection function. If the output voltage exceeds the set limit value, the instrument will shutdown with an action time less than 20 ms;
  • It has over current protection function. It will shutdown if current exceeds the set value in high voltage side with action time less than 20 ms. And it will shutdown if current exceeds rated current in low voltage side with action time less than 20 ms;
  • A built-in protection resistor and so no need other outside resistor;
  • It adopts high and low voltage closed-loop negative feedback control circuit, and so voltage will not go up due to an inherent capacitance.

 

IV. Universal technical data

  1. Output frequency: 0.1Hz, 0.05Hz, 0.02Hz
  2. Measurement accuracy: 3%
  3. Positive and negative voltage peak errors: ≤ 3%
  4. Voltage wave form distortion: ≤ 5%
  5. Use condition: indoor and outdoor; temperature: -10℃+40℃
  6. Humidity: ≤ 85%RH
  7. Power: AC50Hz, 220V ±5%
 
 
V. Optioonal Model and Test Range:
 
ModelRated voltageLoading abilityWeightApplication
VLF-30

30kV

(Peak value)

0.1Hz,≤1.1µF

Controller:4㎏

Step-up equipment:25㎏

Dimension:323*174*323

10 kV Cable, generator, etc.
0.05Hz,≤2.2µF
0.02Hz,≤5.5µF
VLF-40

40kV

(Peak value)

0.1Hz,≤1.1µF

Controller:5㎏

Step-up equipment:30㎏

Dimension:357*208*343

13.8 kV Cable, generator, etc.
0.05Hz,≤2.2µF
0.02Hz,≤5.5µF
VLF-50

50kV

(Peak value)

0.1Hz,≤1.1µF

Controller:6㎏

Step-up equipment:45㎏

Dimension:357*210*365

15.75 kV Cable, generator, etc.
0.05Hz,≤2.2µF
0.02Hz,≤5.5µF
VLF-60

60kV

(Peak value)

0.1Hz,≤1.1µF

Controller:6㎏

Step-up equipment:50㎏

Dimension:357*220*370

18 kV Cable, generator, etc.
0.05Hz,≤2.2µF
0.02Hz,≤5.5µF
VLF- 80

80kV

(Peak value)

0.1Hz,≤1.1µF

Controller:8㎏

Step-up equipment:90㎏

Dimension:357*240*390

35 kV Cable, generator, etc.
0.05Hz,≤2.2µF
0.02Hz,≤5.5µF
 


 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

NOTE :  Test  Voltage Standard

1.For cable test

Test peak voltage formula: Umax=3U0

0Single-phase rated voltage of cable

Test time :60mints

 

2. For generator stator

test=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);:

 

 

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