top of page
VLF80/90kV
VLF_edited_edited.png
Introduction to the VLF.Series:

  • The VLF sine wave test series is a compact, robust, and portable VLF sine wave test system designed for medium and high-voltage cables.

  • Featuring air cooling, this system can operate continuously, making it ideal for testing with 0.1 Hz sine wave voltages.

  • The VLF testing system is user-friendly, with single-button operation, a simple menu structure, and a large LCD display for easy control.

  • This series of ultra-low frequency AC withstand voltage testers is perfect for on-site testing of insulation and voltage withstand capacity in polyethylene, crosslinked polyethylene cables, and other high-voltage electrical equipment used by power departments and industrial sectors.

  • Unlike DC voltage withstand tests, this device is considered non-destructive and serves as a great alternative to AC frequency voltage withstand testing.

  • The Model S units also offer a DC withstand test function.

Specs

VLF80/90kV

  • Rated Voltage: 80/90kV (Peak)

  • Load Carrying Capacity:

    • ≦10µF (within 50kV)

    • ≦4µF (above 50kV)

  • Product Structure:

    • Controller: 4kg

    • Primary Booster (40kV): 25kg

    • Two-stage Booster (40/50kV): 45kg

  • Application Range: Used for voltage resistance test of cables and motors greater than 35KV

VLF30/40kV / VLF50kV/VLF60kV/VLF80/90kV
Key Features:

  • Data of current and voltage are obtained directly through the sampling of the high-pressure side.

  • Over-voltage protection: shut down protection operates within 20ms when the output voltage exceeds limits.

  • Over-current protection: dual protection of high and low voltage, downtime protection can be accurately set on the high-pressure side, and shut down protection operates within 20ms when the current of the low-voltage side exceeds current limits.

  • High-voltage output protection resistor is integrated into the HV booster, eliminating the need for an additional outside resistor.

  • The settings allow you to regulate the frequency, which can be adjusted to the following output frequencies: 0.1, 0.05, and 0.02Hz.

  • Closed-loop negative feedback control circuit of high and low voltage.

  • Measurement accuracy: 3%.

  • Positive and negative voltage peak errors: ≤ 3%.

  • Voltage waveform distortion: ≤ 5%.

  • Operating Temperature (indoor and outdoor): -10℃ to +40℃.

  • Humidity: ≤ 85% RH.

  • Power: AC 50Hz, 220V ±5%.

bottom of page