50kV VLF Hipot Tester

Model: VLF-50

VLF stands for Very Low Frequency.

VLF Hipot Tester is an AC output high voltage instrument. VLF HV Tester provides sinusoidal AC voltage but at 0.1Hz-0.02Hz, compared to the 50/60 Hz output of conventional AC test set. It is still an AC voltage with sinusoidal polarity reversals every half cycle.

The 50kV VLF Hipot Tester VLF-50 can output up to 50kV/30mA.

Main Features

1) Output frequency: 0.1Hz, 0.05Hz, 0.02Hz

2) Current, voltage and waveform data are directly sampled from the high-voltage side, which ensures accurate data.

3) With overvoltage protection function. When the output exceeds the set voltage limit, the instrument will stop for protection, and the action time is less than 20ms.

4) With overcurrent protection function for high and low voltage double protection. High voltage side can be set according to the precise stop protection value. When the current on low-voltage side exceeds the rated current, it will be stopped for protection, and the operation time is less than 20ms.

5) The high voltage output protection resistor is designed in the booster body, so there is no need to connect another protection resistor outside.

6) The high and low voltage closed loop negative feedback control circuit is adopted, so the output has no capacitance rise effect.

7) Test results can be saved into tester.

8) Test results can be printed via built-in thermal printer.

Technical Data

1) Output rated voltage: 50kV/30mA(peak value)

2) Output frequency: 0.1Hz, 0.05Hz, 0.02Hz

3) Load capacity

0.1Hz, max. 1.1µF

0.05Hz, max. 2.2µF

0.02Hz, max. 5.5µF

4) Measurement accuracy: 3%

5) Voltage positive and negative peak value error: ≤3%

6) Voltage wave form distortion: ≤ 5％

7) Working condition

temperature: -10℃~+40℃

humidity: ≤ 85％RH

8) Power supply: AC220V ±10%, 50/60Hz

50kV VLF Hipot Tester VLF-50 is powerful test instrument for measuring power cable or rotating machinery(motor/generator) at 0.1Hz, 0.05Hz or 0.02Hz.

HAOMAI ELECTRIC TEST EQUIPMENT CO.,LTD, as a subsidiary of HAOMAI ELECTRIC POWER AUTOMATION CO.,LTD, located in Shenzhen of China, mainly focuses on the sales and services of Protection Relay Test Set, Instrument Transformer Test Set, CT/PT Analyzer, Power Transformer Test Set, Circuit Breaker Testing Equipment, Battery Testing Equipment, IEC 61850 Testing Equipment for Smart Substation, Partial Discharge Detector, Transformer Oil Dissolved Gas Analysis and Moisture Monitor etc. electrical test equipment and online monitoring equipment.

The headquarters, HAOMAI ELECTRIC POWER AUTOMATION is established in 1999 and located in Wuhan of China, which is specialized in developing and manufacturing electrical test equipment and online monitoring equipment. HAOMAI products are widely used in power grid, petrochemical, metallurgy, railway, coal mine, research institutes and all kinds of large-scale factories or enterprises.

HAOMAI follows total quality criteria, and always maintains standardized process and procedures for continuous growth. HAOMAI has been certified by ISO 9001:2015, ISO 14001:2015 and ISO 45001:2018. All of HAOMAI products passed Type Test or Calibration in the third party laboratory accredited under ISO/IEC 17025.

HAOMAI builds own RELAYSTAR laboratory and performance test laboratory, and possesses professional production equipment and testing instruments in factory, such as Agilent 34401A 6 1/2 High-precision Meter, FLUKE Multi-meter, EMH Standard Meter, CLOU Standard Power Source, Oscilloscope, Phase Meter, Insulation Test System, High Voltage Dividers, AC High Voltage Generator, Time Calibration Tester, Standard Micro-resistance etc.

HAOMAI is China well-known mark recognized and approved by State Administration for Industry & Commerce of People's Republic of China, and enjoys high reputation in domestic and foreign markets.

HAOMAI now is the key supplier for SGCC(State Grid Corporation of China) and CSG(China Southern Power Grid). Till 2021 HAOMAI products have been sold to 39 different countries.

HAOMAI always sticks to the faith of "cooperation and sharing", takes the "technology and market" as the direction, "creation and innovation" as the soul, listens to clients carefully, and improves the technology, upgrades the products, optimizes the service and tries all to be the global leader in electrical test and measurement instruments field.