CN2241934Y

CN2241934Y - Multi-function protector for electricity consumer

Info

Publication number: CN2241934Y
Application number: CN 95237191
Authority: CN
Inventors: 罗永红
Original assignee: 唐建军
Priority date: 1995-07-14
Filing date: 1995-07-14
Publication date: 1996-12-04
Anticipated expiration: 2005-07-14

Abstract

The utility model relates to a protector for electric consumers, which overcomes the problem that the existing protector has single function and poor sensitivity. The utility model is formed by that after rectified and filtered, the output of a voltage transformer is connected with a switch transistor to control a relay J; a controlled-silicon SCR is connected between the ground and the switch transistor in series; the normal-open contact point of the relay J is connected into an electric line in series; after rectified and filtered, the output of a current transformer is output by an emitter follower to control the controlled-silicon SCR; after a rectified and filtered, the output a zero-sequence current transformer is output to control the controlled-silicon SCR; an alarm circuit is controlled by the normal-open contact point of the relay J; a voltage-sensitive resistor is connected with the electric line in parallel. The utility model is suitable for the electric protection.

Description

Multi-functional Electric protector

The utility model relates to a kind of Protector for using electricity, particularly a kind of multi-functional Electric protector.

Along with improving constantly of living standards of the people, various household electrical appliance also increase day by day, but along with also having brought many potential safety hazards, as the body leakage of some defective household electrical appliances, also some people does not observe the private of safety utilization of electric power rule and draws random connecing, so that causes the generation of various accidents.The power protector that occurs on market at present generally all is that function ratio is more single, even what earth leakage protective and over-voltage over-current protection were arranged also all is that sensitivity is lower, functional reliability is poor, is difficult to be suitable for home appliance and electric consumer's safeguard protection.

It is a kind of simple in structure that the purpose of this utility model is to provide, the multi-functional Electric protector that reliable operation is highly sensitive.

The utility model is finished with following mode: multi-functional Electric protector comprises zero sequence current mutual inductor L0 summation current transformer L1 and the transformer B1 that is connected on on the electric line, after being connected to current rectifying and wave filtering circuit on the output of transformer B1, be connected to the switching circuit that constitutes by switch triode BG1, between the emitter of switch triode BG1 and power supply ground, be connected in series relay J, between the base stage of switch triode BG1 and ground, be connected in series controllable silicon SCR, two the normal opened contact J1 and the J2 of relay J are connected on on the electric line, two normally closed contact serial connection warning circuit; On the output of current transformer L1, be connected to current rectifying and wave filtering circuit Z3 output and connect the emitter follower that constitutes by triode BG2 and resistance, meet the control utmost point A of controllable silicon SCR from the emitter output of triode BG2 through diode D4; On the output of zero sequence current mutual inductor L0, be connected to current rectifying and wave filtering circuit Z2 and export the control utmost point A that is connected to controllable silicon SCR through diode D1; On the Live wires road and be connected to piezo-resistance Rm.Warning circuit is to be connected in series by resistance R 1 and after connecing capacitor C 1 by K switch, meets current rectifying and wave filtering circuit Z1 and exports language integrated circuit (IC) and loud speaker Y to.On relay normally open contact J1 and J2 and be connected to button AN.

The utlity model has simple in structure, multiple functional, reliable operation, highly sensitive, it has overvoltage, overcurrent, electric leakage, thunderstorm hour automatic trip and reports to the police, and the advantage of reporting to the police automatically during incoming call is a kind of comparatively ideal power consumption equipment protector.

Fig. 1 is the utility model circuit theory diagrams.

Below in conjunction with accompanying drawing the utility model is described in further detail:

As shown in Figure 1, the multi-functional Electric protector of the utility model is by being connected on zero sequence current mutual inductor L0 summation current transformer L1 and voltage transformer B1 in the electric line, be connected to the full-wave rectifier filter circuit of forming by diode D2 and D3 and capacitor C 4 and resistance R 3 at the low-pressure side output of transformer B1, the switching circuit that provides DC power supply to constitute to switch triode BG1, at the base stage connecting resistance R4 of switch triode BG1 to power positive end, connect controllable silicon SCR to power supply ground, between the emitter of switch triode BG1 and power supply ground, be connected in series relay J, the a pair of normal opened contact J1 of relay J and J2 are serially connected in in the electric line, its normally closed contact serial connection warning circuit, on normal opened contact J1 and J2 respectively and be connected to two normal opened contacts of push-button switch AN.On the Live wires road and be connected to piezo-resistance Rm, piezo-resistance Rm adopts MYL-270, and it can be higher than 270 volts alternating voltage to crest voltage and be the earial drainage state, thereby makes piezo-resistance Rm be short-circuit condition.Secondary side at current transformer L1 is connected to rectifier Z3 and filter capacitor C5 and resistance R 5, provide direct current signal to emitter follower, the i.e. emitter follower of forming by triode BG2 and resistance R 6, R7, R8, adjust the startup value with potentiometer R6, export the control utmost point A to controlled device SCR through diode D4 from the emitter of triode BG2.By being connected to rectifier Z2 and filter capacitor C3 and resistance R 2 outputs on the zero sequence current mutual inductor L0 output through the control utmost point A of diode D1 to controllable silicon SCR.Warning circuit be by serial connection after the K switch by resistance R 1 and after connecing capacitor C 1 step-down, behind rectifier Z1 and filter capacitor C2, meet CM9300 language chip IC and loud speaker Y.

During use, after pressing the button AN, transformer B1 secondary has output, the triode BG1 turn-on relay J adhesive of switching on, its normal opened contact J1 and J2 closure, the circuit normal power supply is when the circuit overcurrent, the output of current transformer L1 secondary increases, export the control utmost point A of controllable silicon SCR to from triode BG2, make the SCR conducting, triode BG1 ends, the relay J outage, its normal opened contact J1 and J2 disconnect, the line disconnection power supply, the normally closed contact closure of while relay J, warning circuit is reported to the police, when circuit has the people to get an electric shock or leaks electricity, because zero sequence current mutual inductor L0 detects electric leakage signal and behind rectifying and wave-filtering, the control utmost point A through diode D1 exports controllable silicon SCR to makes the SCR conducting, triode BG1 ends, the relay J outage, its normal opened contact J1 and J2 disconnect, and warning circuit is reported to the police simultaneously.When with the electric line overvoltage, because piezo-resistance Rm conducting, circuit is short-circuit condition, and controllable silicon SCR triggers, and relay J discharges, and deenergization is also reported to the police.When cause was stopped power supply, relay J was release condition, and subscriber line circuit is cut off, when sending a telegram here again, and circuit alarm, the effect of K switch is to remove to report to the police.This device also has the certain protection effect to thunderbolt, mainly is can be higher than 270 volts voltage to peak value by piezo-resistance Rm to be the earial drainage state, thereby makes piezo-resistance Rm be short-circuit condition, reaches open-circuit line and protects the purpose of power consumption equipment.

Claims

1. multi-functional Electric protector, it comprises zero sequence current mutual inductor L0 summation current transformer L1 and the transformer B1 that is connected on on the electric line, it is characterized in that after being connected to current rectifying and wave filtering circuit on the output of transformer B1, be connected to the switching circuit that constitutes by switch triode BG1, between the emitter of switch triode BG1 and power supply ground, be connected in series relay J, between the base stage of switch triode BG1 and ground, be connected in series controllable silicon SCR, two the normal opened contact J1 and the J2 of relay J are connected on on the electric line, two normally closed contact serial connection warning circuit;

On the output of current transformer L1, be connected to current rectifying and wave filtering circuit Z3 output and connect the emitter follower that constitutes by triode BG2 and resistance, meet the control utmost point A of controllable silicon SCR from the emitter output of triode BG2 through diode D4;

On the output of zero sequence current mutual inductor L0, be connected to current rectifying and wave filtering circuit Z2 and export the control utmost point A that is connected to controllable silicon SCR through diode D1;

On the Live wires road and be connected to piezo-resistance Rm.

2. according to the described protector of claim 1, it is characterized in that warning circuit is to be connected in series by resistance R 1 and after connecing capacitor C 1 by K switch, meets current rectifying and wave filtering circuit Z1 and exports language integrated circuit (IC) and loud speaker Y to.

3. according to the described protector of claim 1, it is characterized in that on relay normally open contact J1 and J2 and be connected to button AN.