High Voltage Indicators & Detectors

  1. HD Electric APT-1 Active Power Tester
    HD Electric Company logo
    Free UK Delivery
    HD Electric APT-1 Active Power Tester
    (no reviews)
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    • Can be used to check overhead, uninsulated conductors for the absence of voltage
    • Alerts the user to the absence of voltage via an audible and visual indication
    • Suitable for overhead lines with voltages ranging from 7.6 kV to 13.2 kV (line-to-ground)
    We require additional information before you purchase this product.
    HD-APT-1
  2. HD Electric DVI-100 Digital Voltage Indicator – Choice of Kits
    HD Electric Company logo
    Free UK Delivery
    HD Electric DVI-100 Digital Voltage Indicator – Choice of Kits
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    • Available as a standalone instrument or as part of a range of kits
    • Suitable for use on overhead and underground systems, as well as transmission systems up to 161kV
    • Measure voltages between 0.1kV and 99kV line-to-ground
    We require additional information before you purchase this product.
    HD-DVI-100-X
  3. HD Electric DVI-500 Digital Voltage Indicator – Choice of Kits
    HD Electric Company logo
    Free UK Delivery
    HD Electric DVI-500 Digital Voltage Indicator – Choice of Kits
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    • Available as a standalone instrument or as part of a variety of kits (60Hz and 50Hz versions)
    • Read the voltage of conductors up to 500kV line-to-ground
    • Can be used to check overhead and underground distribution and transmission systems
    We require additional information before you purchase this product.
    HD-DVI-500-X
  4. HD Electric DVI-100T Digital Voltage Indicator w/ Capacitive Test Kits
    HD Electric Company logo
    Free UK Delivery
    HD Electric DVI-100T Digital Voltage Indicator w/ Capacitive Test Kits
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    • Available in a choice of kits (60Hz and 50Hz versions)
    • Measure voltages on overhead, underground and transmissions systems, and at elbow test points
    • Measure voltages between 0.1kV and 99kV line-to-ground
    We require additional information before you purchase this product.
    HD-DVI-100T-X
  5. HD Electric DVI-500T Digital Voltage Indicator w/ Capacitive Test Kits
    HD Electric Company logo
    Free UK Delivery
    HD Electric DVI-500T Digital Voltage Indicator w/ Capacitive Test Kits
    (no reviews)
    Call for Pricing
    • Available in several kits (60Hz and 50Hz versions)
    • Read the voltage of conductors up to 500kV line-to-ground
    • Capacitive Test Point Mode: conduct measurements at elbow test points
    We require additional information before you purchase this product.
    HD-DVI-500T-X

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About High Voltage Indicators & Detectors

The best warning for an electrician of a hot power line is a high-voltage indicator. Other devices relying on secondary power sources or subject to protective measures such as fuses can give false positive readings because they are not working as a direct result of the electricity in the lines. A high-voltage indicator is very simple and very effective.

Most high-voltage indicators are simple circuits. They consist of a connector attached to a bus bar in the supply cabinet, and a light-emitting diode inside of a small housing with a window to view the light. The LED may or may not flash, but its illumination lets an electrician know the line is powered and must be shut off before work.

A voltage detector is a device that determines the presence or absence of an electrical charge in an object. It can be a simple, pen-shaped piece of testing hardware that indicates the existence of electricity or an advanced tool that detects precise voltage levels in electrical systems.

A voltage detector measures the flux lines of the electric field formed between the earth's potential and a live component of the system.

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