CN201360110Y

CN201360110Y - Intelligent fireproof electricity-leakage monitor

Info

Publication number: CN201360110Y
Application number: CNU2009201416413U
Authority: CN
Inventors: 龚建林; 夏菊生; 章崎; 万鹏; 陆清华
Original assignee: JIANGXI JINGCHENG MEASUREMENT CONTROL CO Ltd
Current assignee: JIANGXI JINGCHENG MEASUREMENT CONTROL CO Ltd
Priority date: 2009-02-11
Filing date: 2009-02-11
Publication date: 2009-12-09
Anticipated expiration: 2019-02-11

Abstract

The utility model discloses an intelligent fireproof electricity-leakage monitor, which comprises a shell, a zero sequence transformer as well as a central processing circuit, a rectifying amplification circuit, a voltage sampling circuit, a sound and light alarming circuit, a communication circuit and a power supply circuit which are installed on a circuit board, wherein a front panel of the shell is provided with a dot matrix liquid crystal display connected with the central processing circuit, and keys. The electricity-leakage monitor is characterized by also comprising a dual-path silicon controlled output circuit. Furthermore, the electricity-leakage monitor also comprises a self-check analog electricity-leakage generation circuit. The electricity-leakage monitor has the advantages of monitoring electricity-leakage, over-voltage and under-voltage, being capable of realizing communication with an upper computer, facilitating centralized monitoring, and being visualized and simple with menu type operation; besides, the monitor has the advantages that by the keys on the panel and the liquid crystal display, all measuring parameters can be displayed, and alarming values and protection action values can be set and displayed fully with Chinese characters.

Description

Intelligent fire prevention electric leakage monitor

Technical field

The utility model relates to power equipment, especially relates to a kind of intelligent fire prevention electric leakage monitor.

Background technology

It is a kind of effective safeguard procedures that prevent that personal electric shock, electrical fire and electric equipment from damaging that leakage current protector (being RCD) is installed in low voltage electric network.The principle of leakage current protector is mainly utilized magnetic balance, and the electric current that main circuit flows into the leakage current protector will equate that with the electric current of outflow the words that wait can not cause the magnetic imbalance, thereby causes the mechanical mechanism action, cuts off the electricity supply.And cause the magnetic reason of unbalanced to be exactly because the electric current of input and the electric current of output are unequal, and having produced leakage current, in general earth fault take place, and to make electric current flow back to power-supply system from the earth be a main cause.

Existing leakage current protector is a lot, generally all comprises circuit such as central processing circuit, sample circuit, sound light alarming circuit, drive circuit and power circuit, and there is following shortcoming in they: 1, function singleness; 2, can't show electrical leakage; 3, can not report to the police; 4, parameter can not be set, revise; 5, can not detect automatically.

Summary of the invention

The purpose of this utility model be to provide a kind of have electric leakage, overvoltage, under voltage monitoring function, can realization and upper machine communication, be convenient to button on centralized monitor, the panel and LCD and can show and alarming value, protection operating value are set, full Chinese character shows and menu mode operation, simple intelligent fire prevention electric leakage monitor directly perceived each measurement parameter.

The purpose of this utility model is achieved in that the utility model comprises housing, zero-sequence transformer and the central processing circuit that is installed on the circuit board, the rectification amplifying circuit, voltage sample circuit, sound light alarming circuit, telecommunication circuit and power circuit, voltage sample circuit, sound light alarming circuit is connected with central processing circuit respectively by lead with telecommunication circuit, the lattice lcd display and the button that are connected with central processing circuit respectively by lead are installed on the front panel of housing, power circuit with the filtering of 220V civil power step-down rectifier after output DC supply with other circuit, feature is also to comprise two-way controllable silicon output circuit.

The utility model comprises that also circuit takes place in self check simulation electric leakage.

The utility model is owing to increased two-way controllable silicon output circuit and self check simulation electric leakage generation circuit on the basis of conventional leakage current protector, thereby it has the active output of two-way (220V, 1A), residual current and overvoltage are exported one the road and are driven, under voltage is exported one the road and is driven, different loads can be disconnected respectively, also same distribution release can be in parallelly driven; And the utility model has also adopted lattice graphics lcd as display device, and full menu Chinese character operation, directly perceived, simple can show a plurality of parameters simultaneously.Because the utility model has designed self check simulation electric leakage circuit taking place, thereby can simulate leakage current by program control and monitor whether operate as normal of the utility model at any time.Therefore, the utlity model has electric leakage, overvoltage, under voltage monitoring function, can realization and upper machine communication, be convenient to button on centralized monitor, the panel and LCD and can show and alarming value, protection operating value are set, full Chinese character shows and menu mode operation, simple advantage directly perceived each measurement parameter.

Description of drawings

Fig. 1 is a shell structure schematic diagram of the present utility model;

Fig. 2 is a circuit diagram of the present utility model.

Embodiment

Below in conjunction with embodiment and contrast accompanying drawing the utility model is described in further detail.

This utility model comprises housing 1, zero-sequence transformer L1 and the central processing circuit CPU (model: PIC16F877) that is installed on the circuit board, the rectification amplifying circuit, voltage sample circuit, sound light alarming circuit, telecommunication circuit, two-way controllable silicon output circuit, circuit and power circuit take place in self check simulation electric leakage, sample circuit, sound light alarming circuit is connected with central processing circuit CPU respectively by lead with telecommunication circuit, the lattice lcd display 2 and the button 3 that are connected with central processing circuit CPU respectively by lead are installed on the front panel 4 of housing 1, power circuit with the filtering of 220V civil power step-down rectifier after output+5V direct current supply with other circuit, two-way controllable silicon output circuit is by the 1st, 2 triode BG1, BG2, the 1st, 2 bidirectional triode thyristor KG1, KG2,1--the 8th resistance R 1--R8, the 1st, 2 capacitor C 1, C2 and the 1st, 2 isolating transformer B1, B2 forms, the 1st output 20 pin of one termination central processing circuit CPU of the 1st resistance R 1, the base stage of another termination the 1st triode BG1 of the 1st resistance R 1, the grounded emitter of the 1st triode BG1, the collector electrode of the 1st triode BG1 successively with the 2nd resistance R 2, connect+5V voltage after the primary coil series connection of the 1st isolating transformer B1, the terminal A 1 of the 1st bidirectional triode thyristor KG1 successively with the secondary coil of the 1st isolating transformer B1, meet the control end F1 of the 1st bidirectional triode thyristor KG1 after 3 series connection of the 3rd resistance R, the 1st capacitor C 1 is connected in parallel on the two ends of the secondary coil of the 1st isolating transformer B1, the 4th resistance R 4 is connected in parallel between the terminal A 1 and end points E1 of the 1st bidirectional triode thyristor KG1, the 2nd output 16 pin of one termination central processing circuit CPU of the 5th resistance R 5, the base stage of another termination the 2nd triode BG2 of the 5th resistance R 5, the grounded emitter of the 2nd triode BG2, the collector electrode of the 2nd triode BG2 successively with the 6th resistance R 6, connect+5V voltage after the primary coil series connection of the 2nd isolating transformer B2, the terminal A 2 of the 2nd bidirectional triode thyristor KG2 successively with the secondary coil of the 2nd isolating transformer B2, meet the control end F2 of the 2nd bidirectional triode thyristor KG2 after 7 series connection of the 7th resistance R, the 2nd capacitor C 2 is connected in parallel on the two ends of the secondary coil of the 2nd isolating transformer B2, the 8th resistance R 8 is connected in parallel between the terminal A 2 and end points E2 of the 2nd bidirectional triode thyristor KG2, the terminal A 1 of the 1st bidirectional triode thyristor KG1 meets electric leakage and overvoltage tripping operation output G, the terminal A 2 of the 2nd bidirectional triode thyristor KG2 meets undervoltage trip output D, the common port of the end points E2 of the end points E1 of the 1st bidirectional triode thyristor KG1 and the 2nd bidirectional triode thyristor KG2 line end L that starts to exchange fire, common port COM connecting to neutral line end N.

The utility model comprises that also circuit takes place in self check simulation electric leakage, circuit takes place by the instrument transformer winding L in self check simulation electric leakage, the 3rd bidirectional triode thyristor KG3,9--the 11st resistance R 9-R11 and self check button K form, electric leakage self check end 17 pin of one termination central processing circuit CPU of the 11st resistance R 11, the control end F3 of another termination the 3rd bidirectional triode thyristor KG3 of the 11st resistance R 11, terminal A 3 ground connection of the 3rd bidirectional triode thyristor KG3, the end points E3 of the 3rd bidirectional triode thyristor KG3 successively with the 10th resistance R 10, the 9th resistance R 9, the input of instrument transformer winding L series connection back connecting to neutral preface instrument transformer, the input of the output termination rectification amplifying circuit of zero-sequence transformer, analog input end 2 pin of the output termination central processing circuit CPU of rectification amplifying circuit, the end ground connection of self check button K, the common port of another termination the 10th resistance R 10 and the 9th resistance R 9.

Operation principle:

1, two-way controllable silicon output circuit: the 1st output 20 human hair combing wastes by central processing circuit CPU go out command signal, through the 1st triode BG1, the 1st bidirectional triode thyristor KG1 conducting of the 1st isolating transformer B1 Coupling Control electric leakage and overvoltage tripping operation output G are got, or go out command signal by the 2nd output 16 human hair combing wastes of central processing circuit CPU, through the 2nd triode BG2, the 2nd bidirectional triode thyristor KG2 conducting of the 2nd isolating transformer B2 Coupling Control undervoltage trip output D is got, give the release of back, trigger the electric switch tripping operation.

2, circuit takes place in self check simulation electric leakage: electric leakage self check end 17 human hair combing wastes by central processing circuit CPU go out command signal, control the 3rd bidirectional triode thyristor KG3 conducting, zero-sequence transformer will be given central processing circuit CPU judgement through the over commutation amplifying circuit and finish self check by certain electric current.

Claims

1, a kind of intelligent fire prevention electric leakage monitor, comprise housing (1), zero-sequence transformer and the central processing circuit (CPU) that is installed on the circuit board, the rectification amplifying circuit, voltage sample circuit, sound light alarming circuit, telecommunication circuit and power circuit, voltage sample circuit, sound light alarming circuit is connected with central processing circuit (CPU) respectively by lead with telecommunication circuit, the lattice lcd display (2) and the button (3) that are connected with central processing circuit (CPU) respectively by lead are installed on the front panel (4) of housing (1), power circuit with the filtering of 220V civil power step-down rectifier after output+5V direct current supply with other circuit, it is characterized in that: also comprise two-way controllable silicon output circuit, two-way controllable silicon output circuit is by the 1st, 2 triode (BG1, BG2), the 1st, 2 bidirectional triode thyristor (KG1, KG2), 1--the 8th resistance (R1--R8), the 1st, 2 electric capacity (C1, C2) and the 1st, 2 isolating transformer (B1, B2) form, the 1st output 20 pin of one termination central processing circuit (CPU) of the 1st resistance (R1), the base stage of another termination the 1st triode (BG1) of the 1st resistance (R1), the grounded emitter of the 1st triode (BG1), the collector electrode of the 1st triode (BG1) successively with the 2nd resistance (R2), connect+5V voltage after the primary coil series connection of the 1st isolating transformer (B1), the terminal A 1 of the 1st bidirectional triode thyristor (KG1) successively with the secondary coil of the 1st isolating transformer (B1), meet the control end F1 of the 1st bidirectional triode thyristor (KG1) after the 3rd resistance (R3) series connection, the 1st electric capacity (C1) is connected in parallel on the two ends of the secondary coil of the 1st isolating transformer (B1), the 4th resistance (R4) is connected in parallel between the terminal A 1 and end points E1 of the 1st bidirectional triode thyristor (KG1), the 2nd output 16 pin of one termination central processing circuit (CPU) of the 5th resistance (R5), the base stage of another termination the 2nd triode (BG2) of the 5th resistance (R5), the grounded emitter of the 2nd triode (BG2), the collector electrode of the 2nd triode (BG2) successively with the 6th resistance (R6), connect+5V voltage after the primary coil series connection of the 2nd isolating transformer (B2), the terminal A 2 of the 2nd bidirectional triode thyristor (KG2) successively with the secondary coil of the 2nd isolating transformer (B2), meet the control end F2 of the 2nd bidirectional triode thyristor (KG2) after the 7th resistance (R7) series connection, the 2nd electric capacity (C2) is connected in parallel on the two ends of the secondary coil of the 2nd isolating transformer (B2), the 8th resistance (R8) is connected in parallel between the terminal A 2 and end points E2 of the 2nd bidirectional triode thyristor (KG2), the terminal A 1 of the 1st bidirectional triode thyristor (KG1) meets electric leakage and overvoltage tripping operation output G, the terminal A 2 of the 2nd bidirectional triode thyristor (KG2) meets undervoltage trip output D, the common port of the end points E2 of the end points E1 of the 1st bidirectional triode thyristor (KG1) and the 2nd bidirectional triode thyristor (KG2) the line end L that starts to exchange fire, common port COM connecting to neutral line end N.

2, intelligent fire prevention electric leakage monitor as claimed in claim 1, it is characterized in that: comprise that also circuit takes place in self check simulation electric leakage, circuit takes place by instrument transformer winding (L) in self check simulation electric leakage, the 3rd bidirectional triode thyristor (KG3), 9--the 11st resistance (R9-R11) and self check button (K) are formed, electric leakage self check end 17 pin of one termination central processing circuit (CPU) of the 11st resistance (R11), the control end F3 of another termination the 3rd bidirectional triode thyristor (KG3) of the 11st resistance (R11), terminal A 3 ground connection of the 3rd bidirectional triode thyristor (KG3), the end points E3 of the 3rd bidirectional triode thyristor (KG3) successively with the 10th resistance (R10), the 9th resistance (R9), the input of instrument transformer winding (L) series connection back connecting to neutral preface instrument transformer, the input of the output termination rectification amplifying circuit of zero-sequence transformer, analog input end 2 pin of the output termination central processing circuit (CPU) of rectification amplifying circuit, one end ground connection of self check button (K), the common port of another termination the 10th resistance (R10) and the 9th resistance (R9).