A high-voltage live display device for indoor use, comprising an epoxy resin vacuum casting body, with an upper fixed flange and a lower fixed flange on the vacuum casting body, as well as three high-voltage signal sampling points. The feature is that: sensing pieces are respectively set at the three high-voltage signal sampling points of the vacuum casting body, and the sensing pieces are connected to the control circuit through wires; The control circuit consists of a high-voltage signal processing circuit, a voltage stabilizing circuit, and an execution circuit. Compared with the existing technology, the present utility model adopts an induction chip for sampling, which can omit the capacitor core rod and reduce production costs. It uses the high-voltage signal obtained by the induction chip to process and control the operation of the relay, achieving display and locking functions
The high-voltage live display device can not only indicate the live status of the circuit, but also cooperate with the electromagnetic lock to achieve forced locking of the operating handle and network door of the switchgear. To achieve the purpose of preventing live shutdown, closing grounding switches, and preventing accidental entry into live compartments. Improve the error prevention performance of switchgear.
The high-voltage live display device consists of two components: a sensor and a display, which are connected together by outdoor wires.
The post insulator type sensor in the device can be matched with various types of high-voltage switchgear, isolation switchgear, grounding switches, etc.
The display functions in the device include prompt type and forced type.
The prompt type has a single display (i.e. three sensors with one display, dual display (i.e. three sensors with two displays, wiring principle is the same as single display), and the two displays are installed on two different sides of the switchgear. Reminder type: The light-emitting diode is not allowed to rest.
Compulsory type: It not only has all the functions of prompt type, but also uses voltage signals to control electronic switches, and cooperates with electromagnetic locks to perform forced locking. When only one phase of the three-phase circuit is charged, the electromagnetic lock cannot be unlocked. The direct key switch in the display is used as a selection for the working and resting conditions of the light-emitting diode. When the neon light is in a resting state, the forced locking circuit cannot be unlocked.