High Voltage Electric Display Device With Neon Lamps , Neon Voltage Indicator

DXN-5T High Voltage Indicator with  Sulphur hexafluoride Switchgear equipment

High voltage electric display devices using neon lamps as display elements are widely used in distribution cabinets. After a long period of operation, a high loss of visibility and extensive damage to neon bubbles are found. In order to compensate for the defect, a neon light running / closing switch was installed on the electric display device, which was in a state of turning off at normal times, thus temporarily deactivating the whole high-voltage electric display device.

This treatment loses the role of a high-voltage live display device as a monitor for whether the line side is charged.The brightness of neon lamps is low, especially in bright environments where the brightness is scoured and less visible.The old type of high-voltage electric display device with mandatory electrical latching, which is too simple in principle, consists of half wave rectifying and directly combining the signals from the A, B and C phase sensors to control the latching circuit. In this way, when the system has an anomaly of single phase grounding or absence phase, the drift of the locked-in control voltage can lead to the accident of the electrically connected grounding switch.