CN203260995U

CN203260995U - Single-phase safety electricity-using appliance

Info

Publication number: CN203260995U
Application number: CN 201320300985
Authority: CN
Inventors: 李春祥; 张凡振; 关长山
Original assignee: QINHUANGDAO SANGGE ELECTRIC CONTROL EQUIPMENT CO Ltd
Current assignee: QINHUANGDAO SANGGE ELECTRIC CONTROL EQUIPMENT CO Ltd
Priority date: 2013-05-29
Filing date: 2013-05-29
Publication date: 2013-10-30
Anticipated expiration: 2023-05-29

Abstract

A single-phase safety electricity-using appliance is composed of a breaker, an IGBT power switch, an isolation transformer, a pulse isolation drive circuit, a state display and alarm circuit, a DSP control circuit, a signal isolation adjustment circuit, an auxiliary power supply, an input voltage sampling circuit, an input current sampling circuit, an electric leakage monitoring circuit, an output current sampling circuit and a 485 communication circuit. The single-phase safety electricity-using appliance has an anti-electric shock function, can protect equipment and circuits in case of overcurrent, overvoltage, undervoltage and short circuit, has functions of automatic power-on and power-off, delayed power supply, automatic electric leakage detection and alarm, and can detect and control circuits by connecting an external remote monitoring system and the 485 communication circuit.

Description

Single-phase safety utilization of electric power instrument

Technical field

The utility model relates to protective device for electric safety, is specifically related to a kind of single-phase safety utilization of electric power instrument.

Background technology

At present, electricity consumption instrument commonly used is protected circuit by earth leakage protective device.Earth leakage protective device mainly is divided into voltage-type and current mode, and its principle all is to cut off supply line by testing circuit and executive circuit, makes down circuitry, guarantees circuit or personal safety.In case this method testing circuit or executive circuit break down, and accident potential will occur.Simultaneously; traditional guard method mainly be by fuse or excess flow switch be used for circuit is protected; fuse needs could cut off power supply after the fusing in the ordinary course of things; fusing time and electric current are inversely proportional to; fusing must have larger electric current in short time; can produce a large amount of sparks and high temperature during fusing; excess flow switch need to instantaneously surpass ten times of rated current or just can cut off the electricity supply more than the decades of times; and larger electric current also will produce larger spark and high temperature, and these sparks and high temperature hide some dangers for for serious accident too.In addition, because what use is fuse or excess flow switch, in case fuse or excess flow switch play a role after having an accident, whole circuit namely is cut off, only have again change fuse or replacement excess flow switch after, circuit could recover normally, and can't be normal by the automatic recovery of self function of circuit.

Summary of the invention

The purpose of this utility model is to provide a kind of and is installed in real-time detection line electricity consumption situation in the electric line, and the single-phase safety utilization of electric power instrument that the person and power consumption equipment are protected fast.

The technical scheme that realizes the utility model purpose is: a kind of single-phase safety utilization of electric power instrument, and it comprises circuit breaker, IGBT power switch, isolating transformer, impulsive quarantine drive circuit, state demonstration and circuit for alarming, DSP control circuit, signal isolation Circuit tuning, accessory power supply, input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit and 485 communicating circuits; Single phase poaer supply accesses described circuit breaker input, and the circuit breaker output connects IGBT power switch input, and IGBT power switch output connects the input of isolating transformer, and the output of isolating transformer connects load; The input of described input voltage sample circuit, input current sample circuit is connected with the single phase poaer supply of circuit breaker output respectively; The input of described electric leakage monitoring circuit, output current sample circuit is connected with the output of isolating transformer respectively; The output of described input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit connects respectively the input of signal isolation Circuit tuning, the output of signal isolation Circuit tuning connects the input of DSP control circuit, the signal end of the connection status demonstration of DSP control circuit output and circuit for alarming, 485 communicating circuits and impulsive quarantine drive circuit, impulsive quarantine drive circuit output connects the signal input part of IGBT power switch; Described accessory power supply input is connected with the single phase poaer supply of circuit breaker output, and auxiliary power output end is connected with impulsive quarantine drive circuit, state demonstration and circuit for alarming, DSP control circuit, signal isolation Circuit tuning, input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit, 485 communicating circuits respectively.

The utlity model has electroshock-proof function, simultaneously the overcurrent of equipment and circuit, overvoltage, under-voltage, short-circuit conditions are had defencive function, and have auto-power-cutting, time-delay and send electricity, automatically detect electric leakage and warning function; By outer remote supervisory control system and being connected of 485 communicating circuits circuit being detected and controls.

Description of drawings

Accompanying drawing 1 is theory diagram of the present utility model.

Among Fig. 1,1, the IGBT power switch, 2, isolating transformer, 3, impulsive quarantine drive circuit, 4, state shows and circuit for alarming, 5, the DSP control circuit, 6, signal isolation Circuit tuning, 7, accessory power supply, 8, the input voltage sample circuit, 9, input current sample circuit, 10, electric leakage monitoring circuit, 11, the output current sample circuit, 12,485 communicating circuits, 13, load, 14, circuit breaker.

Embodiment

By reference to the accompanying drawings embodiment of the present utility model is described.

In the embodiment in figure 1, single phase poaer supply access circuit breaker 14 inputs are for complete machine provides power supply.The output of circuit breaker 14 connects the input of IGBT power switch 1, and supply voltage is input to IGBT power switch 1.The output of IGBT power switch 1 connects the input of isolation transformation 2, and supply voltage is powered to isolating transformer 2 through the control of IGBT power switch 1.The output of isolating transformer 2 connects load 13, and the voltage that isolated variable is later is to load 13 power supplies.

The input of input voltage sample circuit 8, input current sample circuit 9 is connected with the single phase poaer supply of circuit breaker output respectively, current voltage and current value in the testing circuit.The input of electric leakage monitoring circuit 10, output current sample circuit 11 is connected with the output of isolating transformer 2 respectively, detects respectively leakage current and operating current in the load circuit.The output of input voltage sample circuit 8, input current sample circuit 9, electric leakage monitoring circuit 10, output current sample circuit 11 connects respectively the input of signal isolation Circuit tuning 6, and input voltage sample circuit 8, input current sample circuit 9, electric leakage monitoring circuit 10, output current sample circuit 11 are transformed into low-voltage dc signal with the signal that collects and send 6 processing of signal isolation Circuit tuning to.The output of signal isolation Circuit tuning 6 connects the input of DSP control circuit 5, after the signal process filtering that signal isolation Circuit tuning 6 collects each sample circuit, adjustment, the isolation, become and be fit to the analog quantity that DSP control circuit 5 is processed, deliver to again the input of DSP control circuit 5, process to control the work of complete machine through DSP control circuit 5 internal processes.The signal end of the demonstration of DSP control circuit 5 output connection status and circuit for alarming 4,485 communicating circuits 12 and impulsive quarantine drive circuit 3; when any one signal that collects during greater than set point; DSP control circuit 5 sends stopping signal and turn-offs to impulsive quarantine drive circuit 3 control IGBT power switchs 1; protection loaded line and personal safety; demonstrate failure cause by state demonstration and circuit for alarming 4 simultaneously, and by being connected of outer remote supervisory control system and 485 communicating circuits 12 work at present state and running parameter being uploaded to the host computer demonstration.Impulsive quarantine drive circuit 3 outputs connect the signal input part of IGBT power switch 1, be used for carrying out the control signal that DSP control circuit 5 sends and open or turn-off IGBT power switch 1, the work of control complete machine with stop.Accessory power supply 7 inputs are connected with the single phase poaer supply of circuit breaker 14 outputs, and accessory power supply 7 outputs are connected with impulsive quarantine drive circuit 3, state demonstration and circuit for alarming 4, DSP control circuit 5, signal isolation Circuit tuning 6, input voltage sample circuit 8, input current sample circuit 9, electric leakage monitoring circuit 10, output current sample circuit 11,485 communicating circuits 12 respectively.Accessory power supply 7 is obtained input voltage from the power supply of circuit breaker 14 outputs, through providing stable working power for other circuit of complete machine after conversion, rectification, the voltage stabilizing.

Claims

1. single-phase safety utilization of electric power instrument is characterized in that: it comprises circuit breaker, IGBT power switch, isolating transformer, impulsive quarantine drive circuit, state demonstration and circuit for alarming, DSP control circuit, signal isolation Circuit tuning, accessory power supply, input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit and 485 communicating circuits; Single phase poaer supply accesses described circuit breaker input, and the circuit breaker output connects IGBT power switch input, and IGBT power switch output connects the input of isolating transformer, and the output of isolating transformer connects load; The input of described input voltage sample circuit, input current sample circuit is connected with the single phase poaer supply of circuit breaker output respectively; The input of described electric leakage monitoring circuit, output current sample circuit is connected with the output of isolating transformer respectively; The output of described input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit connects respectively the input of signal isolation Circuit tuning, the output of signal isolation Circuit tuning connects the input of DSP control circuit, the signal end of the connection status demonstration of DSP control circuit output and circuit for alarming, 485 communicating circuits and impulsive quarantine drive circuit, impulsive quarantine drive circuit output connects the signal input part of IGBT power switch; Described accessory power supply input is connected with the single phase poaer supply of circuit breaker output, and auxiliary power output end is connected with impulsive quarantine drive circuit, state demonstration and circuit for alarming, DSP control circuit, signal isolation Circuit tuning, input voltage sample circuit, input current sample circuit, electric leakage monitoring circuit, output current sample circuit, 485 communicating circuits respectively.