CN203707739U

CN203707739U - Leakage protector with self-check function

Info

Publication number: CN203707739U
Application number: CN201320872992.8U
Authority: CN
Inventors: 戴静振
Original assignee: SHENZHEN YIMIN ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: SHENZHEN YIMIN ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-12-28
Filing date: 2013-12-28
Publication date: 2014-07-09
Anticipated expiration: 2023-12-28

Abstract

The utility model relates to a leakage protector with a self-check function, and belongs to the safe power consumption technical field; the leakage protector comprises a power supply circuit, a leakage sampling circuit, a self-check circuit, a data processing chip, a display circuit, a storage circuit, an alarm circuit, a keyboard circuit and an output/drive load circuit; the leakage protector can realize self-check function, can carry out real time monitoring to work condition of the leakage protector, and alarm warnings can be sent when the protector fails; safety leakage scope can be set according to different power demands, and leakage value and work state of the protector can be displayed; set work parameters of the protector can be stored and memorized; the protector is convenient and safe in operation.

Description

With the earth leakage protective device of self-checking function

Technical field

The utility model relates to earth leakage protective device, belongs to safety utilization of electric power technical field, relates in particular to a kind of earth leakage protective device with self-checking function.

Background technology

For guaranteeing Electrical Safety; at present solar obligation earth leakage protective device all in cubicle switch; and in order to ensure the normal work of earth leakage protective device; in use; need user regularly to press the working condition of testing button check protection device, if press experiment button, protector switch trip; illustrate that earth leakage protective device can normally work, can disconnect when zero-sequence transformer produces when uneven leakage current is greater than certain value.

But in actual application; due to a variety of causes; seldom there is user regularly to press experiment button and detect the working condition of earth leakage protective device; once earth leakage protective device breaks down like this; and user when ignorant; just while easily causing line electrical leakage or the person to get an electric shock, protective effect is failure to actuate, is not produced to protector, and this has brought very large hidden danger to safety utilization of electric power.In addition, the earth leakage protective operating value of current earth leakage protective device product is all fixed, and does not possess the adjustable function of earth leakage protective scope, can not adjust according to concrete need for electricity, uses very inconvenience.

Summary of the invention

For solving the deficiencies in the prior art, the utility model provide a kind of safer, use more easily with the earth leakage protective device of self-checking function.

In order to achieve the above object; the earth leakage protective device with self-checking function that the utility model provides; comprise power circuit, electric leakage sample circuit, self-checking circuit, data processing chip, display circuit, memory circuit, warning circuit, keyboard circuit and output/driving load circuit, described power circuit, electric leakage sample circuit, self-checking circuit, display circuit, memory circuit, warning circuit, keyboard circuit are all connected with data processing chip with output/driving load circuit.

Described electric leakage sample circuit and keyboard circuit respectively by collected electric signal transmission to data processing chip, the treated signal of telecommunication is transferred to respectively display circuit, memory circuit, warning circuit, output/driving load circuit and self-checking circuit by data processing chip.

Described power circuit comprises input terminal assembly, fuse F1, anti-thunder tube FLG, transformer T1, rectifier bridge D1, voltage stabilizing chip U4 and U5 and filter capacitor C1, C2, C3, C8, C9.

Described electric leakage sample circuit is by instrument transformer L4, resistance R 15, R16, R18, R19, R27, filter capacitor C7, C20, rectifier diode D9 and operational amplifier U2-B composition.

Described self-checking circuit is by protecting diode D3, triode Q7, and resistance R 1, R31, R32 and relay J 1 form.

Described data processing chip is connected with capacitor C 15; Described data processing chip is connected with display screen XSP and forms display circuit, is connected forms memory circuit with storage chip U2 and filter capacitor C17, is connected forms warning circuit with buzzer SP1, is connected forms keyboard circuit with button K2, K5, K6.

Described output/driving load circuit is by resistance R 33, R34, and triode Q8 and relay J 2 form, and are connected with data processing chip by R34, is connected with output terminal assembly or socket by relay J 2.

The utility model has the advantages that, can be achieved as follows several large functions:

1. self-checking function: can realize in real time earth leakage protective device self is detected, find in time the fault that protector may occur, the possibility that while strictly stopping electric leakage occurs or get an electric shock, protector is failure to actuate, effectively avoids the generation with electrification;

2. warning function: detect and find when earth leakage protective device exists fault understand warning reminding or ban use of, and can be incorporated to microsystem;

3. self-defined earth leakage protective scope: can safe electric leakage scope be set according to the situation of different needs for electricity and concrete power supply facilities, use more convenient;

4. memory function: can set safe electric leakage scope and protector running parameter be remembered and be stored;

5. Presentation Function: protector can show that whether electrical leakage, the relevant operating state that data and earth leakage protective device be set be normal in real time.

Accompanying drawing explanation

Fig. 1 is circuit block diagram of the present utility model.

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

Embodiment

Below in conjunction with accompanying drawing, an embodiment of the present utility model is described in further detail.

As depicted in figs. 1 and 2, a kind of earth leakage protective device with self-checking function, it is by power circuit (A), electric leakage sample circuit (B), self-checking circuit (C), data processing chip (U1), display circuit (D), memory circuit (E), warning circuit (F), keyboard circuit (G) and output/drive load circuit (H) to form, described power circuit (A), electric leakage sample circuit (B), self-checking circuit (C), display circuit (D), memory circuit (E), warning circuit (F), keyboard circuit (G) is all connected with data processing chip (U1) with output/driving load circuit (H).

As shown in Figure 2, described electric leakage sample circuit (B) and keyboard circuit (G) respectively by collected electric signal transmission to data processing chip (U1), the treated signal of telecommunication is transferred to respectively display circuit (D), memory circuit (E), warning circuit (F), output/drive load circuit (H) and self-checking circuit (C) by data processing chip (U1).

Described power circuit (A) comprises input terminal assembly, fuse F1, anti-thunder tube FLG, transformer T1, rectifier bridge D1, voltage stabilizing chip U4 and U5 and filter capacitor C1, C2, C3, C8, C9.

Described electric leakage sample circuit (B) is by instrument transformer L4, resistance R 15, R16, R18, R19, R27, filter capacitor C7, C20, rectifier diode D9 and operational amplifier U2-B composition.

Described self-checking circuit (C) is by protection diode D3, triode Q7, and resistance R 1, R31, R32 and relay J 1 form.

Described data processing chip (U1) is connected with capacitor C 15; Described data processing chip (U1) is connected with display screen XSP and forms display circuit (D), be connected with storage chip U2 and filter capacitor C17 and form memory circuit (E), be connected with buzzer SP1 and form warning circuit (F), be connected with button K2, K5, K6 and form keyboard circuit (G).

Described output/driving load circuit (H) is by resistance R 33, R34, and triode Q8 and relay J 2 form, and is connected with data processing chip (U1) by R34, is connected with output terminal assembly or socket by relay J 2.

Compare with similar protector product; the utility model possesses self-checking function; working condition that can Real-Time Monitoring earth leakage protective device; when effectively avoiding electric leakage or getting an electric shock protector be failure to actuate and cause with electrification, there is the advantages such as earth leakage protective actuating range is adjustable, protector operating state is visible simultaneously.

Claims

1. the earth leakage protective device with self-checking function; it is characterized in that it is made up of power circuit, electric leakage sample circuit, self-checking circuit, data processing chip, display circuit, memory circuit, warning circuit, keyboard circuit and output/driving load circuit, described power circuit, electric leakage sample circuit, self-checking circuit, display circuit, memory circuit, warning circuit, keyboard circuit are all connected with data processing chip with output/driving load circuit.

2. the earth leakage protective device with self-checking function according to claim 1; it is characterized in that: described electric leakage sample circuit and keyboard circuit respectively by collected electric signal transmission to data processing chip, the treated signal of telecommunication is transferred to respectively display circuit, memory circuit, warning circuit, output/driving load circuit and self-checking circuit by data processing chip.

3. the earth leakage protective device with self-checking function according to claim 1, is characterized in that: described power circuit comprises input terminal assembly, fuse F1, anti-thunder tube FLG, transformer T1, rectifier bridge D1, voltage stabilizing chip U4 and U5 and filter capacitor C1, C2, C3, C8, C9.

4. the earth leakage protective device with self-checking function according to claim 1; it is characterized in that: described electric leakage sample circuit is by instrument transformer L4; resistance R 15, R16, R18, R19, R27, filter capacitor C7, C20, rectifier diode D9 and operational amplifier U2-B composition.

5. the earth leakage protective device with self-checking function according to claim 1, is characterized in that: described self-checking circuit is by protecting diode D3, triode Q7, and resistance R 1, R31, R32 and relay J 1 form.

6. the earth leakage protective device with self-checking function according to claim 1, is characterized in that: described data processing chip is connected with capacitor C 15; Described data processing chip is connected with display screen XSP and forms display circuit, is connected forms memory circuit with storage chip U2 and filter capacitor C17, is connected forms warning circuit with buzzer SP1, is connected forms keyboard circuit with button K2, K5, K6.

7. the earth leakage protective device with self-checking function according to claim 1; be characterised in that: described output/driving load circuit is by resistance R 33, R34; triode Q8 and relay J 2 form; and be connected with data processing chip by R34, be connected with output terminal assembly or socket by relay J 2.