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VLF30/40kV
Download Product Specs
The VLF 30kV / 40kV Very Low Frequency Tester is a compact and portable insulation test system designed for testing medium-voltage power cables and electrical equipment.
Using 0.1Hz sine wave technology, the system provides a non-destructive alternative to traditional AC withstand testing while significantly reducing equipment size, weight, and power requirements.
The tester is ideal for utilities, contractors, and industrial maintenance teams performing insulation withstand testing on MV cable systems.
Key Features
• Very Low Frequency 0.1Hz sine wave testing
• Compact and portable design
• Single-button operation with structured menu system
• Large LCD display for clear readings
• Adjustable test frequencies 0.1Hz / 0.05Hz / 0.02Hz
• Closed-loop voltage control for stable output
• Integrated over-voltage and over-current protection
• High-voltage output protection resistor built into booster
• Optional Tan Delta diagnostic testing
Applications
• Medium-voltage cable insulation testing
• Power utility cable commissioning
• Industrial power system maintenance
• Motor insulation testing
• Preventive maintenance testing
Technical Specifications
Rated Voltage
30kV / 40kV (peak)
Frequency Range
Automatic frequency change
0.1Hz – 0.01Hz
Load Capacity
≤10µF
System Weight
Controller: 4 kg
Booster: 25 kg
Application Range
30kV Model
• Cable testing up to 11kV
40kV Model
• Cable testing up to 22kV
Power Supply
AC 220V ±5% / 50Hz
Operating Conditions
Operating Temperature
-10°C to +40°C
Humidity
≤85% RH