FIELD: electricity.
SUBSTANCE: marker consists of casing (1) with clamp (2) (groove-type, spiral-type, etc.) for attachment to a wire or protection wire (3) of the line. An electrical circuit of the marker consists of inductive transformer (4) and frequency converter (5), which act from electromagnetic field of the wire or protection wire (3) of the line and provide electrical power supply rated at least at 1 W, solid-state light source (6) represented by light-emitting diodes providing light radiation of at least 5 Cd, which is non-directed in horizontal plane, at vertical projection at an angle of 0° to 180°, photocell (7) responding to low level of total illumination, the threshold value of which for actuation of the light warning system is set to 30-50 lux. Protection against radio interference is provided by means of toroidal circular or ellipsoidal screen (9). The marker is designed for operation at the temperatures within -60°C to +60°C.
EFFECT: improving reliability, simplifying installation and providing independence of electrical power supply.
5 cl, 1 dwg
