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VLF/DC Hipot Tester with Integrated Tan Delta

The HVA68TD is a truly compact and portable VLF test set that determines the condition of medium voltage cables with a voltage rating up to 46 kV (acc. to IEEE 400.2). It performs VLF and DC testing, as well as sheath testing and sheath fault location (additional fault probe needed).

The high output power of the HVA greatly expands the load possibilities. It allows testing longer cables or several phases in parallel. The integrated Tan Delta diagnostics enables a straightforward condition assessment of the cable system.

Performance: Best in class output power combined with outstanding TD diagnostics features. Safety first: Two independent discharge devices (electronic & mechanical) plus an integrated 12 kV backfeed protection system (at 50/60 Hz).

MWT: The HVA68TD offers Monitored Withstand Testing, a combination of withstand testing & Tan Delta diagnostics in compliance with IEEE 400.2.

Connectivity: On-site, no external PC is needed. All results can be downloaded later via USB or Bluetooth for further investigation and easy reporting with the HVA ControlCenter.

Flexible high voltage connection options: Our HV test leads enable a simple and safe connection between HVA & DUT. They are available in different lengths and are quickly exchangeable.


  • VLF AC/DC 68kV now with integrated TD !!
  • Meets all NETA and IEEE Stds !!
  • Powerful 2uF (>20 000ft) output at Full Voltage and Freq.
  • Ideal for long cable runs on Solar & Wind Farms
  • Integrated Automatic Cable Fault Prelocation APL
  • Rugged Oil Free Construction with 100% duty cycle onsite operation
  • Dual Safety Discharge and 12kV System Backfeed Protection

Output Modes

  • VLF 48kVrms/68kV Peak output
  • DC ±68kV
  • Sine/Square/ DC outputs
  • Cable Jacket / Sheath testing mode
  • TD measurement mode
  • Vacuum bottle testing mode
  • Fault Conditioning/Trip
  • Load independent output waveform


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

Optional Attachments

Technical Specifications

Ordering Information:
706 803
Power Supply/Input Voltage:
110 to 240V AC ±10% (50/60Hz)
Input Power Requirements:
1.5 kVA @ 120V (limited) 3.5kVA @ 240V
Rated Max Output Voltage:

Sinusoidal RMS/Peak
48kV / 68kV
± 0-68 kV
± 1%, Resolution: 0.1 kV
Output Current:
0-88 mA
Resistance Range:
0.1 MΩ - 20 GΩ
Output Frequency (default 0.1Hz):
0.01-0.1 Hz in Steps of 0.01 Hz (default 0.1 Hz)
Automatic Frequency Optimization
Output Load:
2 µF @ 0.1 Hz @ 44 kVrms
Sheath Test Trip Current
0.1 ... 5mA
Sheath Fault Location:
35 mA max.
Voltage and Current (True RMS and / or Peak), Tan Delta Capacitance, Resistance, Time, Flashover Voltage
Tan Delta Measurement:
Accuracy ± 1 x 10-4. Fully Compliant with IEEE400.2
Duty Cycle:
Continuous, no thermal limitation of operating time
Test Modes:
Manual & Automatic
Output Modes:
AC (VLF) Sinewave Symmetrical and Load-Independent Across Full Range, DC (Plus orNegative Polarity), Burn/Fault Condition or Fault Trip Mode, Jacket/Sheath Testing, Squarewave
50 / 60 Hz - 12kV Feedback Protection / Dual Discharge System (internal)
Computer Interface:
Bluetooth and USB
Memory / Test Record Storage:

Built in Memory
50 Test Records, 50 Test Sequences
USB Flash Drive
Unlimited (see options)
PC Software
“HVA Control Center” and “TD Control Center” Windows Compatible
Standard HV Test Lead Cable Included:
13ft / 4m
139 lbs / 63 kg

Imperial (inches)
18.3 x 13.4 x 20.1"
Metric (mm)
466 x 340 x 510mm
-13°F to 158°F / -25°C to 70°C
23°F to 113°F / -5°C to +45°C
85% RH non-condensing

* Based on typical MV cable. 100pf/ft or 330 pF/m

Note: Due to continuous development, the information may change without notice.

Tan Delta
Partial Discharge