CN202172264U

CN202172264U - Zero line monitoring device

Info

Publication number: CN202172264U
Application number: CN2011202606499U
Authority: CN
Inventors: 傅志海
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-03-21
Anticipated expiration: 2021-07-22

Abstract

The utility model relates to a monitoring device, in particular to a zero line monitoring device. The monitoring device comprises a three-phase power supply detection circuit, a singlechip control circuit, an alarm circuit, a breaker drive circuit and a wireless transceiving circuit, wherein a signal acquired by the three-phase power supply detection circuit is sent to the singlechip control circuit through an optocoupler isolation circuit and is controlled and output to the alarm circuit, the breaker drive circuit and the wireless transceiving circuit through the singlechip control circuit; when an output end and an input end of a zero line of a breaker are in a non-conducting state, a singlechip judges and gives out an alarm signal until the power supply is cut off, so that the safety of power equipment is ensured, and the alarm signal is sent to a receiving host through a wireless emission module to inform an operator on duty to perform timely maintenance.

Description

The zero line supervising device

Technical field

The utility model relates to a kind of supervising device, particularly be a kind of zero line supervising device.

Background technology

In low power distribution system; Circuit breaker is divided into 3 utmost points or 4 utmost points; Wherein 4 utmost points are the connecting and disconnecting that comprise zero line, because service time is long or switch also can cause the inner zero line contact loose contact of circuit breaker often or disconnect phenomenon, it is seriously uneven to cause single-phase load three-phase voltage to occur like this; Zero line belongs to the common port of claiming the three-phase phase line; In case circuit breaker zero line output and input end are when disconnecting, it is too high or too low phase voltage to occur, burns out electric equipment and electrical fire takes place.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of zero line supervising device is provided.

The utility model solves the technical scheme that its technical problem adopted: the zero line supervising device; Comprise three phase mains testing circuit, single chip machine controlling circuit, warning circuit, circuit breaker drive circuit and wireless transceiver circuit; The signal of said three phase mains testing circuit collection sends to single chip machine controlling circuit through optical coupling isolation circuit, exports warning circuit, circuit breaker drive circuit and wireless transceiver circuit to by single chip machine controlling circuit control.

Said three phase mains testing circuit is connected to the input of circuit breaker by the live wire output of three-phase, and the output that the output of zero line is connected in circuit breaker constitutes.

The output signal of said circuit breaker is successively through decompression capacitor, divider resistance, rectifier diode, filter capacitor, voltage stabilizing didoe signal processing.

Said wireless transceiver circuit is made up of FDD-5 transmitter module, JDD-5 receiver module, external light-emitting diode and the loud speaker of JDD-5 receiver module.

Through adopting above-mentioned technical scheme; The beneficial effect of the utility model is: when circuit breaker zero line output and input end during in not on-state, after single-chip microcomputer is judged, send alarm signal; Until cutting off the electricity supply; Thereby the safety of protection power consumption equipment, and pass through wireless transmitter module and send alarm signal to receiving main frame, notify the operator on duty in time to safeguard.

Description of drawings

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

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

Embodiment

As shown in Figure 1; The zero line supervising device of the utility model; Comprise three phase mains testing circuit 1, single chip machine controlling circuit 2, warning circuit 3, circuit breaker drive circuit 4 and wireless transceiver circuit 5; The signal that said three phase mains testing circuit 1 is gathered sends to single chip machine controlling circuit 2 through optical coupling isolation circuit 11, exports warning circuit 3, circuit breaker drive circuit 4 and wireless transceiver circuit 5 to by single chip machine controlling circuit 2 controls.

As shown in Figure 2, three live wires of three-phase are connected to the input of circuit breaker CM1, and zero line N is connected in the output of circuit breaker CM1.Form testing circuit by capacitor C 1, resistance R 1, diode D1, capacitor C 2, voltage-stabiliser tube DW, resistance R 2, resistance R 3 etc., when circuit breaker CM1 was in combined floodgate, live wire L1, zero line N constituted the AC220V ac voltage circuit; Live wire L1 is through capacitor C 1 step-down, resistance R 1 dividing potential drop, diode D1 rectification, capacitor C 2 filtering, voltage-stabiliser tube DW voltage stabilizing, and this voltage signal sends to photoelectrical coupler U1; Make it conducting; It is output as low level signal, and the 38th pin I/O port that is input to single-chip microcomputer IC1 through resistance 3R2 also is in low level state, and expression circuit breaker CM1 zero line is in normal connection power supply state; After single-chip microcomputer IC1 internal processes is judged, do not send control signal.

When circuit breaker CM1 is in combined floodgate; Live wire L1, when zero line N does not constitute the AC220V ac voltage circuit, live wire L1 does not have step-down, voltage-stabiliser tube DW not to have voltage regulation signal output through capacitor C 1 yet, this signal sends to photoelectrical coupler U1; Photoelectrical coupler U1 is in cut-off state; Its output is a high level signal, is input to single-chip microcomputer IC1 the 38th pin I/O port through resistance 3R2 and also is in high level state, and expression circuit breaker CM1 zero line is not in the connection power supply state; Comprehensively be judged as " disconnected zero " through single-chip microcomputer IC1 internal processes; Single-chip microcomputer IC1 sends out three the tunnel and sends control signal, and the first via is exported the 24th pin output low level signal by single-chip microcomputer IC1, make that loud speaker YD sends " ticking ... " The sound; The expression output end voltage is unusual; The second tunnel output through resistance 3R9 current limliting, makes triode Q1 conducting by the 35th pin of single-chip microcomputer IC1 output high level, the relay J adhesive, and its contact J-1 transfers to normally closedly by often opening, and promotes the outage of threading off of circuit breaker CM1 shunt opening coil, guarantees power consumption equipment safety; Third Road output through resistance 3R8 current limliting, makes triode VT1 conducting by the 25th pin output high level signal of single-chip microcomputer I C1; Be input to the 2nd pin of FDD-5 transmitter module IC2, and deliver to its 3rd pin CP modulation signal input end, the high-frequency signal of emission is modulated; Antenna TX promptly launches modulated frequency electromagnetic waves to JDD-5 receiver module IC3; The 4th pin CPA audio signal output end of JDD-5 receiver module IC3 directly drives common electrical dynamic formula loud speaker Y and sends chimes of doom, and its 2nd pin data output end output high level makes LED 1 get electroluminescence simultaneously, and expression receives the alarm signal of extension set; Show malfunction, reach monitoring alarm.

An above-described preferred embodiment that is merely the utility model can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. zero line supervising device; It is characterized in that: comprise three phase mains testing circuit (1), single chip machine controlling circuit (2), warning circuit (3), circuit breaker drive circuit (4) and wireless transceiver circuit (5); The signal that said three phase mains testing circuit (1) is gathered sends to single chip machine controlling circuit (2) through optical coupling isolation circuit (11), exports warning circuit (3), circuit breaker drive circuit (4) and wireless transceiver circuit (5) to by single chip machine controlling circuit (2) control.

2. zero line supervising device according to claim 1 is characterized in that: said three phase mains testing circuit (1) is connected to the input of circuit breaker by the live wire output of three-phase, and the output that the output of zero line is connected in circuit breaker constitutes.

3. zero line supervising device according to claim 2 is characterized in that: the output signal of said circuit breaker is successively through decompression capacitor, divider resistance, rectifier diode, filter capacitor, voltage stabilizing didoe signal processing.

4. zero line supervising device according to claim 1 is characterized in that: said wireless transceiver circuit (5) is made up of FDD-5 transmitter module, JDD-5 receiver module, external light-emitting diode and the loud speaker of JDD-5 receiver module.