Active and passive dual-mode induction high-voltage live display device

Abstract

The invention relates to an active and passive dual-mode sensing high-voltage presence indication device and an implementation method of the device. The device comprises a non-contact high-voltage electrified sensor. The output end of the non-contact high-voltage electrified sensor is connected with a trigger circuit through a rectifier bridge and an energy storage circuit in sequence. The output end of the trigger circuit is connected to a passive channel through a distributor circuit on one route and is connected to an active channel on the other route. The passive channel comprises a first LED lamp and a first optocoupler. The positive electrode of the first LED lamp is connected with the first output end of the distributor circuit. The negative electrode of the first LED lamp is connected with the positive input end of the first optocoupler. The negative input end of the first optocoupler is connected to the negative end of the rectifier bridge. In the active channel, a signal output by the second output end of the distributor circuit passes through a second optocoupler, and is sent to a CPU to be processed, output and displayed after being shaped.

Description

technical field [0001] The invention relates to the technical field of high-voltage charging display, in particular to an active and passive dual-mode induction high-voltage charging display device and a method for realizing the same. Background technique [0002] Due to its important role in ensuring the safety of operators and maintenance personnel, the high-voltage live display has become an important part of high-voltage equipment to achieve intrinsic safety. There are mainly two types of high-voltage charged display devices currently on the market, one is a contact type, and the other is a non-contact type. [0003] Contact charged display device, its high-voltage sensor is directly connected to the high-voltage end, the advantage is that the live display does not need an external working power supply, and the light-emitting element is directly driven by capacitive voltage division for display, but its major disadvantage is that the sensor is directly connected to the h...

AI Technical Summary

Problems solved by technology

[0003] Contact charged display device, its high-voltage sensor is directly connected to the high-voltage end, the advantage is that the live display does not need an external working power supply, and the light-emitting element is directly driven by capacitive voltage division for display, but its major disadvantage is that the sensor is directly connected to the high voltage, and the high-voltage capacitor is due to various There is a danger of breakdown due to these reasons, and there are serious safety hazards. At present, the State Grid system requires that it be replaced with a non-contact type.

[0004] The non-contact charged display device uses the principle of high-voltage electric field effect to detect whether the high-voltage equipment is charged without direct contact. Potential safety hazards; however, such products currently on the market must have an external power supply when working, and when the external power supply is missing, it will not work normally and indicate whether the high-voltage equipment is live, which is easy to mislead the operator or maintenance personnel to think that the equipment is not Live, can not provide anti-mislocking

This major defect greatly restricts the application range of non-contact charged display

[0005] In addition, the current high-voltage live display device on the market can only be installed at a certain distance from the air insulation of the exposed live conductor. In the distribution network, for equipment with a compact structure and extremely limited installation space, such as power distribution ring main Difficulty installing

SM and RM ring network cabinet line side grounding knife switch is completely relying on the line side high-voltage live display device for indirect electric inspection before operation, but currently only one set of high-voltage live display device is installed, which does not meet the indirect electric inspection in the "Safety Regulations" of the State Grid Requirements to apply the "dual approach"

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