Quick positioning and digital display device of multiloop line faults and method thereof

Abstract

The invention discloses a quick positioning and digital display device of multiloop line faults and a method thereof. The quick positioning and digital display device of the multiloop line faults comprises an induction device, an interface circuit, a microprocessor module and a sound-light alarming circuit. A detecting device detects the loop grounding and short-circuit states in real time, and provides a power supply for low-voltage loops; when the short-circuit and grounding faults occur, the detecting device outputs fault signals to the interface circuit; only the power supply of the fault loops is cut off; superior breakers are not cut off. The interface circuit comprises a sound-light alarming interface circuit and a digital tube display interface circuit; the fault signals are divided into normally closed contact signals and normally open contact signals, which are respectively accessed in the sound-light alarming interface circuit and the digital tube display interface circuit. The digital tube display interface circuit is connected with the input end of the microprocessor module; the output end of the microprocessor module outputs fault display characters. The sound-light alarming interface circuit is connected with the sound-light alarming circuit; the sound-light alarming circuit outputs sound and light alarms.

Description

technical field [0001] The invention relates to the monitoring and display of power supply circuit faults, and more specifically, to a digital display device and method for rapidly locating multi-circuit circuit faults. Background technique [0002] In the automatic control process of the cold rolling process, a large number of detection devices are used to realize the automatic production of the whole process, and it is necessary to provide power and transmit signals to the detection devices through cables. The installation location and environment of the detection device, such as inside the cold rolling mill, around the furnace, around the acid tank, etc., are subject to oil pollution, high temperature, acid mist, etc., which determine the susceptibility of cable faults. Multiple detection devices sharing one circuit breaker is the mainstream power supply method, but when a short circuit or ground fault occurs in any circuit under the circuit breaker, the circuit breaker w...

AI Technical Summary

Problems solved by technology

The common feature of the existing technology is that it only provides short-circuit and ground fault indications for high-voltage lines, and it only detects single-circuit faults, and cannot centrally detect multi-circuit short circuits and ground faults.

Images