HVA28TD VLF/DC Hipot Tester with Tan Delta

Compact and portable HVA28TD VLF/DC test set system

The HVA28TD is a truly compact and portable VLF/DC test set system for testing medium voltage cables. It performs VLF and DC testing, sheath testing with sheath fault location mode and TD leakage current correction (guard terminal) is included. Assessments of cable condition can also be carried out by use of Tan Delta Diagnostics.

The smallest VLF/DC unit on the market now includes an integrated Tan Delta measurement system to perform advanced electrical insulation diagnostics. For example, this can be extremely useful when performing advanced diagnostics on cable systems as it provides valuable information as to the condition of the cable insulation and shield.

The instrument automatically performs a TD test, stepping up the voltage at the user prescribed levels (according to the IEEE) and stores the results. All test parameters including insulation resistance, capacitance, RMS current and voltage, test durations, voltage steps, tan delta, and standard deviation are all measured and displayed by the HVA28 LCD display or stored to an internal memory. 

Test results can also be transferred directly to a USB memory stick or wirelessly via Bluetooth to a PC for later analysis and reporting using the supplied industry leading reporting software – TD Control Center. All units are shipped with a calibration certificate, TD Control Center software, corona protection shields, Bluetooth dongle, and an accessories tote.

Features

Integrated TD unit
TD resolution ±1×10-4
TD analysis and reporting using TD Control Center
Digital RMS metering
Smallest unit available
Bluetooth/USB Mem. stick PC Interface
Colour LCD Display
Insulation resistance and cap. measurement
Perform advanced diagnostics on MV Cables according to IEEE400 and 400.2
Output frequency optimisation
Real time oscilloscope display
Auto and manual test sequences
Internal storage of test reports
Unlimited duty cycle
Flashover voltage detection
Power supply immunity and independence
Low maintenance, oil-free design
RMS Digital Metering of Current and Voltage

Output Modes

VLF 20kVrms/28kV peak output
DC ±28kV
Sine/square/ DC outputs
Cable jacket / sheath testing mode
TD measurement mode
Vacuum bottle testing mode
Fault cconditioning/trip
Load independent output waveform

Safety

Short circuit detection
Emergency Off button
Integrated internal discharge of DUT
12kV power frequency voltage feedback protection