The Megger Detex Voltage Detectors are for use on any grounded electrical system, DETEX Voltage Detectors are available in seven models that cover a range from distribution class to transmission line voltages up to 550 kV. Megger offers six electronic "beeper" models and one model with white LED indication for greater visibility when testing indoors.
The beeper-style electronic detectors provide audible and visual indication of the presence of phase-to-ground ac voltages, in accordance with ANSI C84.1-1982 standards.
The 6.9-kV model is equipped with a telescopic pole. All other models are fitted for universal spline mounting on a hot line pole rated for the voltage of the system being tested.
Electronic voltage detectors for use on distribution line voltages (Cat. No. 514360 series) provide a single red LED.
Detectors rated for transmission line voltages (Cat. No. 514242 series) provide four LEDs for improved visibility at greater distances.
The white LED-indicating voltage detector is designed for indoor testing of grounded ac systems. A row of bright LED indicators provide easy visibility in poor lighting conditions. During testing, the presence of voltages within the detector's operating range will illuminate the bright LED bulbs.
A built-in piezoelectric voltage source provides a test feature to ensure that the detector is operative before use. A pushbutton activates the self-test.
The detector is equipped with a 48-in. (1219-mm) telescopic pole calibrated and marked for voltages within the ratings of the detector. These demarcations assist the user in adjusting the pole to the length required for safe operation. The pole retracts to 34 in. (864 mm) for convenient storage in a vinyl carrying case when not in use.
All DETEX models provide continuous monitoring with no on/off switch. They respond to minimum phase-to-ground voltages as outlined by ANSI C84.1 standards, with conformance to IEC guidelines for capacitive high-voltage test instruments.
Prior to testing, a self-test may be activated on the electronic detectors at the push of a button. The test simulates application of external voltage to the probe electrode, which verifies the operation of the buzzer and lights a red LED.
When the TEST button is released, a green LED indicates the detector is operative and ready for use. If voltages within the detector's operating range are present during testing, the green LED extinguishes, the red LED flashes and the audio tone sounds until the detector is removed from the voltage source.
