The VDA0300 is a wide range transmission and distribution voltage detector. It has the widest and highest voltage range available in a single voltage detector. VDAO300 Features: 2.4kV – 300kV Line to Ground (4kV – 500kV Phase to Phase) Voltage Range. For Overhead and URD Applications. Meter is Passive, Battery is Only Required for the Test Position. A Linear/Logarithmic Scale for Better Resolution from Distribution to Transmission Systems.