Non-Contact, High Voltage Detector 275HVD
9
3.4 Detection Levels
The 275HVD is used by moving it closer to the live conductor until the
buzzer and light warnings are triggered. It is designed to detect at a lower
voltage than the range setting.
The following data is considered as typical response for the 275HVD. Vari-
ations may occur from unit to unit. As a general rule, in a “clean” environ-
ment, the 275HVD will trigger @ 45 to 65% of the voltage range at 4"/10cm,
and detected the selected voltage setting at 8 to 12" (20 to 30cm).
The following data provides indicative distances at which the 275HVD will
detect a given voltage. Note that these tests were conducted in ideal test
conditions (unshielded single conductor, lab environment, sensor head
perpendicular to conductor) and are not fully representative of the work
site,whichmayhaveothervoltagespresent(andwhichmayinuencethe
overall results).
The distances should only be taken as indicative and not as electrical
specications.Careshouldbetakenwheninpresenceofotherconductors
which may also be detected by the 275HVD (see § 4.2). Measurements
are based upon a 90° angle (sensor head perpendicular to conductor).
Range Setting Distance Voltage Detection
240V 4" – 10cm 75V – 90V
2kV 4" – 10cm 1.3kV
6kV 4" – 10cm 3.6kV
11kV 4" – 10cm 7.5kV
22kV 4" – 10cm 11kV
33kV 4" – 10cm 19.5kV
132kV 4" – 10cm Not Rated
275kV 4" – 10cm Not Rated
Range Setting Voltage Distance
240V 240V 10.5" - 27cm
2kV 2kV 10.5" - 27cm
6kV 6kV 11.5" - 29cm
11kV 11kV 10.5" - 27cm
22kV 22kV 12.2" - 31cm
33kV 33kV 11.0" - 28cm
132kV 132kV 10.0" - 25cm
275kV 275kV 10.0" - 25cm
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