Short-circuit monitoring system for urban lamp post electrical box

Abstract

The invention relates to the technical field of intelligent lamp poles, and provides an urban lamp pole electrical box short circuit monitoring system, which comprises a short circuit current detection circuit, and is characterized in that the short circuit current detection circuit comprises a voltage follower U4A, a voltage division circuit, a double-limit comparison circuit and an NAND gate U6 which are arranged in sequence, the input end of the voltage follower U4A is used for being connected with a current sensor, and the output end of the voltage follower U4A is used for being connected with the current sensor; the voltage division circuit comprises a resistor R1, a potentiometer RP1 and a resistor R2 which are connected in series, the double-limit comparison circuit comprises an operational amplifier U5A and an operational amplifier U5B, the first end of the resistor R1 is connected with a power supply + 15V, the second end of the resistor R1 is connected to the in-phase input end of the operational amplifier U5A, the inverting input end of the operational amplifier U5A is connected with the output end of the voltage follower U4A, the first end of the resistor R2 is connected with a power supply-15V, and the second end of the resistor R2 is connected with the output end of the voltage follower U4A. And the second end of the resistor R2 is connected to the inverted input end of the operational amplifier U5B. According to the technical scheme, the problem that the short-circuit monitoring system of the urban lamp post electrical box in the prior art is not timely in protection is solved.

Description

technical field [0001] The invention relates to the technical field of smart light poles, in particular to a short circuit monitoring system for an electrical box of an urban light pole. Background technique [0002] At present, all cities in our country have installed street lights, and even there are street lights on remote rural roads. Street lights have become an indispensable part of people's lives. While street lights bring convenience to people, they also bring some hidden dangers. For example, after long-term use of the lines of street lights electrical boxes, short circuits are caused due to insulation damage, which may damage the street lights in light cases, or cause nearby items to catch fire in severe cases, affecting pedestrian safety. Therefore, it is urgent to improve the short circuit monitoring circuit of the existing urban light pole electrical box. SUMMARY OF THE INVENTION [0003] The invention proposes a short circuit monitoring system for an electri...

AI Technical Summary

Problems solved by technology

[0003] The invention proposes a short-circuit monitoring system for the electrical box of urban light poles, which solves the problem of untimely protection of the short-circuit monitoring system of the electrical box of urban light poles in the related art

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