CN201421934Y

CN201421934Y - Electric leakage and over-voltage protection plug board

Info

Publication number: CN201421934Y
Application number: CN2009200791727U
Authority: CN
Inventors: 陈清尧
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-23
Filing date: 2009-02-23
Publication date: 2010-03-10
Anticipated expiration: 2019-02-23

Abstract

The utility model discloses an electric leakage and over-voltage protection plug board. The plug board is characterized in that the plug board comprises a power input unit, a control protection circuit and an eight-way output socket; the power input unit consists of a three-pin plug, a fuse, a power indicator and an AC voltmeter; the control protection circuit is composed of an electric leakage and over-voltage release breaker, a mutual inductor, a thermal resistor, a thyristor, a rectifier and the like; and the eight-way output socket is composed by the connection of eight three-hole socketsin parallel. The electric leakage and over-voltage protection plug board is suitable for being used in household appliances such as televisions, refrigerators, washing machines, electric fans and computers, and has the functions of AC voltage indication, electric leakage and over-voltage protection and the like.

Description

Electric leakage overvoltage protection plate

Technical field

The utility model relates to socket, and the overvoltage protection plate is specifically related to leak electricity.

Background technology

At present, the electrical equipment plate that generally uses in the family is a plate of not being with electric leakage and over-voltage protecting function, in case run into that line voltage is unusual, thunder and lightning and household electrical appliance electric leakage etc., causes easily and damages household electrical appliance or generation accident of human electric shock phenomenon.

The utility model content

Problem to be solved in the utility model is how a kind of electric leakage overvoltage protection plate is provided; in a single day this electric leakage overvoltage protection plate runs into that household electrical appliance leak electricity, when electric shock or line voltage are too high; socket just cuts off electrical network automatically on the plate; thereby effectively protect the person and security appliance, these utility model properties of product are safe and reliable, durable in use.

The technical problem that the utility model proposed is to solve like this: construct a kind of electric leakage overvoltage protection plate, it is characterized in that: comprise power supply input, control protection electric circuit and eight road accessory power outlets; The power supply input is made up of three-pin plug, insurance, power supply indicator and A.C. voltmeter; Control protection electric circuit is made up of electric leakage overvoltage dropout circuit breaker, instrument transformer, thermistor, controllable silicon and rectifier device; Eight road sockets of output are composed in parallel by 8 Three-hole sockets; The live wire end (L) of three-pin plug (CT) connects dropout circuit breaker (K1) fixed contact one end through insurance (RD), and the zero line side (N) of three-pin plug (CT) directly is connected with dropout circuit breaker (K1) the fixed contact other end; The zero line side (N) of 8 Three-hole sockets (CZ1-CZ8) links to each other together after instrument transformer (L1) is connected with moving contact one end of dropout circuit breaker (K1); the live wire end (L) of 8 Three-hole sockets (CZ1-CZ8) links to each other together after instrument transformer (L2) is connected with the moving contact other end of dropout circuit breaker (K1), and the ground protection end of 8 Three-hole sockets (CZ1-CZ8) is connected with plug (CT) ground protection end after linking to each other together.

The beneficial effects of the utility model are: in case run into that household electrical appliance leak electricity, when electric shock or line voltage are too high; socket just cuts off electrical network automatically on the plate; thereby effectively protect the person and security appliance, these utility model properties of product are safe and reliable, durable in use.

Description of drawings

Accompanying drawing 1 is a circuit structure diagram of the present utility model.

Embodiment

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

As shown in Figure 1, components and parts are installed in the printed board of a 4cm * 4cm in the utility model frame of broken lines, and A, B, four end points of C, D are connecting line terminals of socket on components and parts printed board and plug, insurance, the plate.The A terminal is the terminal that fuse RD output is connected with the live wire L input of dropout circuit breaker K1; The B terminal is the terminal that the zero line N input of zero line side N on the plug and residual current circuit breaker K1 is connected; The C terminal is the terminal that socket live wire end L is connected with instrument transformer L2 coil output on the plate; The D terminal is the terminal that socket zero line side N is connected with instrument transformer L1 coil output on the plate; Ground wire E is connected with ground wire E on the socket on the three-pin plug; A.C. voltmeter one terminates on the live wire L, the other end is connected on the zero line N, and A.C. voltmeter is fixed on the plate face, and insurance RD is installed in the plate side.

The utility model electric leakage overvoltage protection plate is inserted on the electrical network socket by three-pin plug, power supply indicator ZD sends ruddiness, A.C. voltmeter shows line voltage, civil power adds to K1 dropout circuit breaker L, N end of incoming cables through protective tube RD and zero line side, by L1, the L2 coil of current transformer T, receive on the socket of 8 CZ1-CZ8 that are connected in parallel; Elementary L1, the L2 of T adopt two-wire and around 2 circles in magnet ring, secondary L3 around 300 circles also in magnet ring; Under normal circumstances, by L1, L2 size of current equate, direction is opposite, producing magnetic flux on the magnet ring cancels each other, magnetic flux on the L3 is zero, the non-inductive voltage in its two ends, controllable silicon BT169 control utmost point triggerless voltage is in cut-off state, and no current passes through among the tripping relay coil DT, dropout circuit breaker K1 dibit linked switch is in closure state, and voltage equals electrical network and powers on and press to the load normal power supply on the socket.When the household electrical appliance generation leaky on the plate; be that some electric current flows into the earth on the L line; flow among L1 and the L2; the electric current that flows out is unequal; the magnetic flux that produces on the magnet ring can not offset; then produce induced current among the secondary coil L3; then produce induced potential on the R1; this voltage triggers the silicon controlled trigger electrode through current-limiting resistance R2; the controllable silicon conducting, simultaneously by rectifier D4-D7 rectification, the DC power supply after its rectification is to tripping relay DT coil power supply; the DT coil produces the magnetic field adhesive armature; drive transmission mechanism K1 is disconnected rapidly, stop to power to the load, play the earth leakage protective effect; after waiting to fix a breakdown, the button plate of hand-reset K1 can use again.

Piezo-resistance RU is connected in parallel on current transformer L1, the L2 leading-out terminal is formed overvoltage crowbar; when unusual or thunder and lightning is scurried into electrical network and is caused overvoltage when line voltage; its RU resistance becomes low resistance by high value rapidly; form short circuit current; the secondary coil L3 of instrument transformer produces induced potential rapidly, triggers the controllable silicon conducting, and tripping relay DT coil produces the magnetic field adhesive armature; K1 trips rapidly, prevents because of the household electrical appliance on the overvoltage damage socket.K2 is the test button switch, and R3 is the hookup current-limiting resistor, presses K2, and simulation L1, L2 electric current is unequal, and dropout circuit breaker K1 is if open circuit shows that it shields immediately.C1 is that high-frequency bypass capacitor strobes; C2 is an anti-interference capacitor; the mistake control action that prevents electric spark and thunder and lightning from disturbing and cause, D1-D3 is a transient high-current limiting protecting element, prevents when leakage current is excessive among the coil L3 elements such as the too high damage controllable silicon of induced voltage.

Component parameters: R1-R3 selects the carbon film resistor of 1/8W for use, and R selects the fixed carbon resister of 100K for use; D1-D7 selects the IN4148 diode for use; C1-C2 selects monolithic capacitor for use; Controllable silicon T selects BT169 for use; Voltmeter is selected the AC system voltmeter of 0-300V for use.

The utility model also can be made various flexible mode, more than by embodiment by accompanying drawing 1 illustrated embodiment, be that foregoing of the present utility model is done step detailed description, but this should be interpreted as that the scope of the theme that the utility model is above-mentioned only limits to described example.Do not breaking away under the above-mentioned technological thought situation of the utility model, various replacements and change according to ordinary skill knowledge and customary means are made all should be included in the scope of the present utility model.

Claims

1, a kind of electric leakage overvoltage protection plate is characterized in that: comprise power supply input, control protection electric circuit and eight road accessory power outlets; The power supply input is made up of three-pin plug, insurance, power supply indicator and A.C. voltmeter; Control protection electric circuit is made up of electric leakage overvoltage dropout circuit breaker, instrument transformer, thermistor, controllable silicon and rectifier device; Eight road sockets of output are composed in parallel by 8 Three-hole sockets; The live wire end (L) of three-pin plug (CT) connects dropout circuit breaker (K1) fixed contact one end through insurance (RD), and the zero line side (N) of three-pin plug (CT) directly is connected with dropout circuit breaker (K1) the fixed contact other end; The zero line side (N) of 8 Three-hole sockets (CZ1-CZ8) links to each other together after instrument transformer (L1) is connected with moving contact one end of dropout circuit breaker (K1); the live wire end (L) of 8 Three-hole sockets (CZ1-CZ8) links to each other together after instrument transformer (L2) is connected with the moving contact other end of dropout circuit breaker (K1), and the ground protection end of 8 Three-hole sockets (CZ1-CZ8) is connected with plug (CT) ground protection end after linking to each other together.