Individual voltage indicator SNI-110E ELEKTRO TRADE ET-SGN110

Individual voltage indicator SNI-110E (hereinafter referred to as the indicator) is designed to warn personnel working on overhead power lines (OHL) about being in a potentially dangerous zone due to approaching wires under 6-110 kV voltage to a dangerous distance: less than 2m; at the same time, the sensitivity of the indicator is such that signals of the presence of voltage are given only when the operator approaches the OHL wires (when climbing OHL poles) and are not given when the operator is on the ground. The indicator triggers from 2.1m when approaching the OHL. The indicator is also used for working in 6-110kV switchgear, in which case the indicator triggers only when the cell door is open. Triggering distance: 1.5m from the live part. Indicator sensitivity (triggering distance) is the distance between the indicator, attached to the electrician's workwear, and the nearest live wire at which an intermittent light and sound signal occurs. At a line voltage of 6-110kV, the triggering distance is no more than 2.1m and no less than 1.5m. Indicator supply voltage: 3V Current consumption in standby mode and in signaling mode: 4μA The principle of operation of the indicator is based on the induction of a potential difference between two electrodes introduced into the electric field. The indicator is made in a dielectric housing, the back surface of which features a clip used to attach the indicator to workwear. The clip simultaneously serves as the power switch and the self-test switch of the indicator. The low operating current of the electrical circuit allows the indicator to be used without replacing the battery for the entire service life. The indicator is switched on automatically when it is attached to workwear. At the same time, the indicator emits a short light and sound signal confirming its activation and operability, i.e., it has a self-control function. The indicator works reliably on any poles: including reinforced concrete, with a grounding drop, cable entry, line disconnector, etc. A "DEAD ZONE" of the indicator is possible when the electrician approaches parallel to the axis of the pole at a distance of less than 0.2 meters. When deviating by an angle of more than 10 degrees or moving away from the pole at a distance of more than 0.2 meters, the "DEAD ZONE" disappears. The indicator has dynamic sensitivity, i.e., as it approaches live parts under voltage, the frequency of the indicator's light and sound pulses increases. The indicator allows for a preliminary assessment of the presence of voltage on live parts at distances between them and the operator that significantly exceed safe distances; this is carried out at the operator's request by closing the contact with a hand and directing the indicator toward the live parts.