CN202405748U

CN202405748U - Novel aftercurrent detector

Info

Publication number: CN202405748U
Application number: CN2012200101136U
Authority: CN
Inventors: 康丽双
Original assignee: Quanzhou Leihang Electronic Co Ltd
Current assignee: Quanzhou Leihang Electronic Co Ltd
Priority date: 2012-01-11
Filing date: 2012-01-11
Publication date: 2012-08-29
Anticipated expiration: 2022-01-11

Abstract

The utility model relates to a novel aftercurrent detector, which comprises an electricity leakage detecting circuit, a signal triggering circuit, a time-delay circuit and a power-off circuit. Signals acquired by the electricity leakage detecting circuit are transmitted to the signal triggering circuit, the signal triggering circuit is in bidirectional data transmission with the time-delay circuit, and output signals of the time-delay circuit are transmitted to the power-off circuit and a wireless transceiving alarm circuit. The detector has the function of prevention from false switching, and a switch can be tripped at the first time and then can be automatically switched on to perform trial line energization after a period of time, so that bustling of people due to accidental electricity leakage and tripping and even accidents due to operation in darkness can be avoided. A normally-closed contact of a contactor is used for supplying power, the contactor is in the release state normally, and accordingly, power consumption is avoided at ordinary times. An electronic circuit is in the off state at ordinary times, so that static consumption is eliminated, the electronic circuit cannot be susceptible to abnormal power sources such as thunder and lightning and the like due to long-term energization. The novel aftercurrent detector has the remote wireless alarm function, thereby being capable of sending out electricity leakage alarm signals to a duty room when electricity leakage accidents occur.

Description

A kind of novel residual current detector

Technical field

The utility model relates to a kind of detector, and what be specifically related to is a kind of novel residual current detector.

Background technology

Residual current is commonly called as leakage current, mainly uses central application of circuit breaker or earth leakage protective device protection equipment, and the fire that electric leakage causes; Account for more than 40% of fire ratio, bring serious threat for people's the security of the lives and property, the most residual current protecting that adopts of China is taken precautions against; Traditional residual current operated protective device when electric leakage earth fault takes place, sends the action outage of threading off; Need the professional operating personnel button of fixing a breakdown, the people is for sending electric combined floodgate.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of novel residual current detector is provided.

The utility model solves the technical scheme that its technical problem adopted: a kind of novel residual current detector; Comprise electric-leakage detection circuit, signal triggering circuit, delay circuit and power-down circuit; The signal of said electric-leakage detection circuit collection transfers to the signal triggering circuit; Signal triggering circuit and delay circuit bidirectional data transfers, the output signal of said delay circuit is sent to power-down circuit and wireless receiving and dispatching warning circuit.

Said electric-leakage detection circuit comprises that resistance R 1, capacitor C 1 that electric leakage instrument transformer LN and output thereof connect constitute, and wherein resistance R 1 is parallelly connected with capacitor C 1.

Said signal triggering circuit comprises normally-closed contact JC-1, normally opened contact JC-2, the relay J 1 of controllable silicon SCR, A.C. contactor JC, A.C. contactor JC.

Said delay circuit adopts time-base circuit IC2.

The input of said time-base circuit IC2 is connected with capacitor C 3, the resistance R 2 that connects power supply respectively, and said capacitor C 3 also is parallel with trigger switch JC-3.

Said wireless receiving and dispatching warning circuit comprises LED 1 and the loud speaker Y that FDD-5 transmitter module IC3, JDD-5 receiver module IC4, JDD-5 receiver module IC4 output connect.

Through adopting above-mentioned technical scheme, the beneficial effect of the utility model is:

1, this detector has the anti-error closing function, can be at the trip switch first time, and it, can be avoided because of accidental leakage tripping lets the people have to run around all the time wears him out after after a while can the automatic reclosing trial line charging in tripping operation, even feels about in the dark operation and have an accident;

2, use the normally-closed contact power supply of contactor, just often contactor is release condition, so not power consumption at ordinary times;

3, be that electronic circuit also is off-position at ordinary times, both eliminated static consumption, can not be subject to the influence of abnormal power supplys such as thunder and lightning again because of long-term energising.

4, have the long distance wireless warning function, when leak current fault takes place, send the leakage-current alarm signal to night shift room.

Description of drawings

Fig. 1 is the circuit structure block diagram of the utility model;

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

Embodiment

Like Fig. 1, shown in Figure 2; A kind of novel residual current detector of the utility model; Comprise electric-leakage detection circuit 1, signal triggering circuit 2, delay circuit 3 and power-down circuit 4; The signal that said electric-leakage detection circuit 1 is gathered transfers to signal triggering circuit 2, and signal triggering circuit 2 and delay circuit 3 bidirectional data transfers, the output signal of said delay circuit 3 are sent to power-down circuit 4 and wireless receiving and dispatching warning circuit 5.

Said electric-leakage detection circuit 1 comprises that resistance R 1, capacitor C 1 that electric leakage instrument transformer LN and output thereof connect constitute; Wherein resistance R 1 is parallelly connected with capacitor C 1, and signal triggering circuit 2 comprises normally-closed contact JC-1, normally opened contact JC-2, the relay J 1 of controllable silicon SCR, A.C. contactor JC, A.C. contactor JC.Under normal condition, the closed power supply of the normally-closed contact JC-1 of A.C. contactor JC, normally opened contact JC-2 breaks off, and so the normally opened contact of the relay J 1 of electric-leakage detection circuit is the delay circuit 3 of JC coil and back no power all.

When electric circuit or equipment have electric leakage, there is the induced current of generation to press the controllable silicon SCR conducting in the LN electric leakage instrument transformer; Relay J 1 gets electric, the J1-1 adhesive of its contact, and A.C. contactor JC gets; The power supply of normally-closed contact JC-1 disconnecting consumers; The closed self-insurance of normally opened contact JC-2, electric-leakage detection circuit dead electricity, relay J 1 discharge again again.Meanwhile, delay circuit 3 energisings.

Said delay circuit 3 adopts time-base circuit IC2, and civil power provides working power through power transformer B step-down, D5-D8 rectification, diode C2 filtering, pressurizer IC1 voltage stabilizing output 12V DC power supply for this machine.During energising just, time-base circuit IC2 the 2nd and 6 pin can not suddenly change because of capacitor C 3 voltage, and present high level, and the 3rd pin of time-base circuit IC2 is output as low level, and relay J 2 is release condition.Capacitor C 3 was charged through resistance resistance R 2 after a period of times; The 2nd, the 6 pin current potentials of time-base circuit IC2 drop to 2/3 supply voltage, its 3rd pin output high level, relay J 2; Its normally-closed contact J2-1 breaks off; A.C. contactor JC dead electricity discharges, and normally opened contact JC-2 breaks off, and delay circuit is thereafter also got back to off-position.The closed trial line charging of normally-closed contact JC-1.Simultaneously,, be input to the 2nd pin of FDD-5 transmitter module IC3, and deliver to its 3rd pin modulation signal input end CP, the high-frequency signal of emission is modulated because the 3rd pin of time-base circuit IC2 output high level through resistance R 4 current limlitings, makes transistor Q1 conducting.Antenna TX promptly externally launches modulated frequency electromagnetic waves.

LED 1 that is connected by JDD-5 receiver module IC4, JDD-5 receiver module IC4 output and loud speaker Y etc. form the wireless receiving alarm control circuit; The 4th pin audio signal output end CPA of JDD-5 receiver module IC4 directly drives common electrical dynamic formula Y loud speaker and sends chimes of doom, and its data output end 2 pin output high level makes LED 1 get electroluminescence simultaneously.Expression receives the data-signal of extension set, reaches long-distance monitoring and alarming.

If load end is accidental electric leakage, then recover normal power supply this moment: then recover normal power supply this moment, if leakage still exists, then tripping operation once more is etc. examine.

What the input of time-base circuit IC2 connected respectively connects capacitor C 3, resistance R 2 for anti-interference set, in order to avoid clutter makes circuit erroneous action.The trigger switch JC-3 of capacitor C 3 parallel connections can bleed off the electric charge on the capacitor C 3 in the moment of A.C. contactor JC trial line charging, guaranteed that circuit can return to the initial time delay state rapidly.When LED 2 was lighted, indicating circuit was in the time-delay "on" position.

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. novel residual current detector; It is characterized in that: comprise electric-leakage detection circuit (1), signal triggering circuit (2), delay circuit (3) and power-down circuit (4); The signal that said electric-leakage detection circuit (1) is gathered transfers to signal triggering circuit (2); Signal triggering circuit (2) and delay circuit (3) bidirectional data transfers, the output signal of said delay circuit (3) is sent to power-down circuit (4) and wireless receiving and dispatching warning circuit (5).

2. residual current detector according to claim 1 is characterized in that: said electric-leakage detection circuit (1) comprises that resistance R 1, capacitor C 1 that electric leakage instrument transformer LN and output thereof connect constitute, and wherein resistance R 1 is parallelly connected with capacitor C 1.

3. residual current detector according to claim 1 and 2 is characterized in that: said signal triggering circuit (2) comprises normally-closed contact JC-1, normally opened contact JC-2, the relay J 1 of controllable silicon SCR, A.C. contactor JC, A.C. contactor JC.

4. residual current detector according to claim 1 and 2 is characterized in that: said delay circuit (3) adopts time-base circuit IC2.

5. residual current detector according to claim 4 is characterized in that: the input of said time-base circuit IC2 is connected with capacitor C 3, the resistance R 2 that connects power supply respectively, and said capacitor C 3 also is parallel with trigger switch JC-3.

6. residual current detector according to claim 1 is characterized in that: said wireless receiving and dispatching warning circuit (5) comprises LED 1 and the loud speaker Y that FDD-5 transmitter module IC3, JDD-5 receiver module IC4, JDD-5 receiver module IC4 output connect.