The Greenlee T330-138500 (52087280) TAG-330 Contact Voltage Detector with Overhead Probes, 138kV to 500kV, is a direct contact type voltage detector for use on transmission voltages. The single range unit determines if a conductor is energized within its specific voltage setting. When operating within the unit's voltage range, the TAG-330 Detector will provide both an audible and visual alarm upon making contact with an energized conductor.

If the TAG-330 is used in situations where the voltage is more than three times higher than the range listed on the product label, the TAG-330 will act as a proximity detector before direct contact is made.

The All-Check self-test feature is required both prior to and after line testing to make certain the unit is working properly. The All-Check self-test is operated by pushing the test button, which will test the battery, the electronic circuitry and the audible and visual alarm.

A universal spline adapter is built into the polycarbonate housing of the TAG-330 Voltage Detector. An extension hot stick (sold separately) is required for use at all times. Hot sticks are available from Greenlee and must be used when placing the detector in contact with any conductor.