B2 HVA28 - Page 33

Design and Construction
© b2 electronic GmbH DHV0086 Rev06 33
Output Modes
The HVA can carry out HV testing in the following output modes:
Output mode Characteristics
DC [- /+] Single-polarity output. DUT is polarized (negative/positive) with respect
to ground.
• Not recommended for testing extruded cables (e.g. XLPE cables).
• Measured value: dielectric loss of the DUT (including leakage current
across terminations)
• DC - : Most commonly used DC output mode
VLF Withstand
Test (VLF)
Sine wave or
square wave
• Suitable for testing extruded cables (e.g. XLPE cables) and other
DUTs.
• Measured values shown as RMS.
VLF Tan Delta
Measurement
(VLF TD)
Sine wave
• Measures the Tan Delta value of the DUT according to selectable
standards and/or custom limits
• Measured values shown as RMS, TD E-3.
Vacuum Bottle
Testing
(VB)
• Not suitable for testing with DC above DUT voltage rating (X-ray hazard)
• Possible in manual and automatic test modes.
• Tripcurrentandriserateareuser-dened.
• Measured value: peak voltage
Sheath Test
(ST)
• Suitable for sheath test
• Durationisuser-dened
• Max test voltage: 10 kV
Sheath Fault
Location Mode
(SFL)
• Suitable for sheath fault location
• Durationisuserdened
• Pulseisuserdened
• (1:3 / 4 s, 1:5 / 4 s, 1:5 / 6 s, 1:9 / 6 s)