Duncan Instruments Canada Ltd
Duncan Instruments Canada Ltd.
Electronic Measurement Solutions since 1968
ISO 9001


High Voltage Indicators Model: HVI


The High Voltage Indicator (HVI) is used to indicate the presence of voltage to ensure the safety of maintenance or installation personnel allowing the apparatus to be safely earthed. Voltage up to 15kV AC or DC, on busbars or within switchgear enclosures will be shown by means of neon indicators. When used within switchgear special bent end adaptors, 60 or 90, are available as accessories.

A battery powered electronic proving unit is available to allow the fully assembled indicator to be tested at site before and after use.

Operation & Features

After carrying out a proving test the HVI can be applied to the HV source and the neon indicators will show whether there is voltage present. The indication will start as low as 200V by means of flashing neon lights which will gradually increase their rate of flash until steady state is reached at 6.35KV (the phase to earth voltage on an 11kV system.

  • Small and compact for use in confined spaces
  • High immunity to interference fields
  • Utilises proven resistor chain method of measurement
  • Clear safety limit marks
  • Operator hand guard with viewing window
  • Automatic battery check on Proving Unit
  • Indoor and outdoor use (dry conditions)
  • Operating temperature range - 5C to + 50C
  • Can be used on DC system
HV Indicator Kit

Each complete HV Indicator kit comprises:

      • Indicator complete with earth lead
      • Proving unit complete with batteries
      • Polymer cleaning Kit
      • Instruction Manual
      • Carry Satch

Technical Specification
HVI Indicator
High Voltage Indicator
Range 0.2 to 15kV 50/60HZ and DC
Circuit Current 0.4mA nominal at 15kV
0.293mA nominal at 11kV
Dielectric Test 20kV for one minute
Length 485 mm
Diameter 32 mm
Weight 0.6 kg
HVI Proving Unit
Proving Unit
Output Voltage 300V DC norminal
Batteries 2 off C cells, IEC R14 or LR14
Battery Low 2V DC norminal
Length 255mm
Diameter 37 mm
Weight 0.4kg
Bent End Adaptors
Bent End Adaptors
Adaptors with a 60 or a 90 bend are available
Weight 675mm
Weight 0.27kg

Instrument selection
Last modified: April 06, 2011.
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