CN203117696U

CN203117696U - Residual current monitoring module

Info

Publication number: CN203117696U
Application number: CN 201320046770
Authority: CN
Inventors: 李明洁
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-22
Filing date: 2013-01-22
Publication date: 2013-08-07
Anticipated expiration: 2023-01-22

Abstract

The utility model relates to a residual current monitoring module comprising a residual current detection circuit and a single-chip microcomputer control circuit. An output signal of the residual current detection circuit is transmitted to a comparator circuit by an amplification circuit. An output signal of the comparator circuit can be transmitted to the single-chip microcomputer control circuit, and an output signal of the single-chip microcomputer control circuit can be transmitted to a ZigBee wireless module circuit. When the residual current faults occur, the ZigBee wireless module circuit can be used for the networking, and an alarming signal can be sent to an alarming center. The residual current monitoring module has advantages of simple networking, low costs, and abilities of monitoring safe utilization of electric power, and realizing wireless monitoring and alarming.

Description

The residual current monitoring module

Technical field

The utility model relates to a kind of monitoring module, particularly be a kind of residual current monitoring module.

Background technology

Residual current is commonly called as leakage current, use in the middle of mainly using isolating switch or earth leakage protective device protection equipment, but traditional earth leakage protective device mainly acts on two kinds of action power dump and warning circuits, can not satisfy the technical requirement of modern Distribution System of Intelligent Buildings.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of residual current monitoring module is provided.

The technical scheme that its technical matters that solves the utility model adopts is: the residual current monitoring module, comprise residual current testing circuit and single chip machine controlling circuit, the output signal of described residual current testing circuit is transferred to comparator circuit through amplifying circuit, the output signal of described comparator circuit is transported to single chip machine controlling circuit, and the output signal of described single chip machine controlling circuit is sent to ZigBee wireless module circuit.

Described residual current testing circuit adopts circuit mutual inductor LN to gather the residual current signal as sensor.

Described single chip machine controlling circuit adopts 2051 single-chip microcomputer IC3.

Described ZigBee wireless module circuit adopts ZM2410 wireless communication module IC4.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: when the residual current fault took place, the utility model sent alerting signal by the networking of ZigBee wireless module circuit to alarm center.Realization safety utilization of electric power monitoring has that networking is simple, wireless monitor is reported to the police, low cost and other advantages.

Description of drawings

Fig. 1 is frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1 and Figure 2, residual current monitoring module of the present utility model, comprise residual current testing circuit 1 and single chip machine controlling circuit 2, the output signal of described residual current testing circuit 1 is transferred to comparator circuit 12 through amplifying circuit 11, the output signal of described comparator circuit 12 is transported to single chip machine controlling circuit 2, and the output signal of described single chip machine controlling circuit 2 is sent to ZigBee wireless module circuit 21.

Described residual current testing circuit 1 adopts circuit mutual inductor LN to gather the residual current signal as sensor, three-phase firewire and zero line are passed circuit mutual inductor LN simultaneously, when the three-phase firewire root has earth fault, the secondary generation induction weak voltage signal of circuit mutual inductor LN, this signal is input to amplifier IC1 the 2nd pin, after amplifier IC1 internal arithmetic is amplified, through diode D1 rectification, be input to comparer IC2 the 2nd pin after capacitor C 2 filtering, when the 2nd pin voltage of comparer IC2 is higher than its 3rd pin voltage, illustrate the residual current fault takes place, the upset of comparer IC2 internal comparator circuit, its the 1st pin output high level signal, this signal is input to the 18th pin of 2051 single-chip microcomputer IC3, after 2051 single-chip microcomputer IC3 internal processors are judged, by the 6th of ZM2410 wireless communication module IC4, the 2nd of 7 ends and 2051 single-chip microcomputer IC3,3 ends are formed ZigBee wireless module circuit 21, ZM2410 wireless communication module IC4 is the embedded serial ports transparent transmission of the Zigbee of built-in 2.4GHZ (some multiple spot and point-to-multipoint) communications protocol, supports aerial upgrade firmware or configuration far module information.Up to the output of the power of 7dBm and-receiving sensitivity of 100dBm, can satisfy telecommunication, send the AT instruction by 2051 single-chip microcomputer IC3 ZM2410 wireless communication module IC4 is realized wireless data transceiving, switch pin with the RS-485 direction, send current warning message to data center, realization safety utilization of electric power monitoring has that networking is simple, wireless monitor is reported to the police, low cost and other advantages.

Above-described only is a preferred embodiment of the present utility model, can not limit the scope that the utility model is implemented, and every equalization of doing according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. residual current monitoring module, it is characterized in that: comprise residual current testing circuit (1) and single chip machine controlling circuit (2), the output signal of described residual current testing circuit (1) is transferred to comparator circuit (12) through amplifying circuit (11), the output signal of described comparator circuit (12) is transported to single chip machine controlling circuit (2), and the output signal of described single chip machine controlling circuit (2) is sent to ZigBee wireless module circuit (21).

2. residual current monitoring module according to claim 1 is characterized in that: described residual current testing circuit (1) adopts circuit mutual inductor LN to gather the residual current signal as sensor.

3. residual current monitoring module according to claim 1 and 2 is characterized in that: described single chip machine controlling circuit (2) employing 2051 single-chip microcomputer IC3.

4. residual current monitoring module according to claim 1 and 2 is characterized in that: described ZigBee wireless module circuit (21) employing ZM2410 wireless communication module IC4.