Overview
The HVA120 insulation tester by b2hv is a powerful 0.1 Hz VLF cable test system for testing medium-voltage cables. It is well known that DC testing of aged extruded cable such as XLPE and EPR is potentially damaging to the cable insulation, causing premature failure of the cable under service conditions. In addition, DC "proof" or hipot testing has been found to be effective in detecting serious defects in cables. Since this is the main objective of any hipot test, and due to the negative side effects of DC, VLF AC waveform testing is now recommended by almost all cable testing standards.
Features
- Predefined standard-compliant cable test sequences
- RMS measurement of output voltage and current
- Measurement of capacitance and resistive load.
- Automatic and load dependent frequency selection (0.01Hz to 0.1Hz)
- Display of current test time.
- Integrated real-time scope function.
- Large output load capability (up to 10µF)
- Automatic measurement reporting
- Report storage (HVA Control Center) for data analysis and storage
- Flashover detection and ultra fast switch off. Flashover voltage measurement
- Time optimized burning mode. No regular maintenance required.
- With it's weight of 181kg the hipot tester provides an excellent power-to-weight-ratio
- The HVA120 cable tester offers various operating modes: cable testing, cable sheath/jacket testing, cable fault conditioning (burning), vacuum bottle test
- The HVA system may then be used for partial discharge measurement.
Acceptance or maintenance hipot/proof testing using VLF high voltage sinusoidal AC allows the operator to efficiently detect serious cable insulation defects, before they result in an in-service failure, without affecting those healthy sections of the cable that still have remaining service life.
Duty cycle
Operating time of this test set is not thermally limited; it may operate continuously.
Safety first
The test set has two independent earthing devices (electronic and mechanical discharging) and an integrated 12 kV transient protection system (at 50 Hz) to protect both the operator and the device.
Connectivity
On site, no external PC is needed. All results can be later downloaded via USB for further investigation and easy reporting via software tool.
Solid HV connectors
Robust HV connectors allow the use of various HV test lead lengths, quick exchange of a replacement cable, or a simpler upgrade path for connection of diagnostics systems.
Service and maintenance
With no oil or arcing contacts, the dry-type transformer makes this test set almost maintenance-free.
