CN105572525A

CN105572525A - Single-phase electric leakage monitoring apparatus

Info

Publication number: CN105572525A
Application number: CN201410612203.6A
Authority: CN
Inventors: 吴志兵; 来庆松; 来心怡
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-11-04
Filing date: 2014-11-04
Publication date: 2016-05-11

Abstract

The invention provides a single-phase electric leakage monitoring apparatus. According to the single-phase electric leakage monitoring apparatus, anti-electricity stealing electric energy meter technologies, power line carrier communication technologies and leakage current detection technologies are integrated. With the apparatus adopted, even if leakage current is very small, as long as the leakage current can be detected, an electric leakage fault can be eliminated in advance, and the tripping of a short-circuit electric leakage circuit breaker can be decreased; and as for some electricity users who do not allow frequent cutting off of a power source, the short-circuit electric leakage circuit breaker cannot be used, while, the single-phase electric leakage monitoring apparatus of the invention can be used, and can timely report electric leakage information. The single-phase electric leakage monitoring apparatus not only can detect measurement parameters of an electric energy meter such as effective voltage and effective current, and can also detect the leakage current of the vector current difference of phase lines and a null line, and has a power line carrier communication function. The single-phase electric leakage monitoring apparatus can replace existing electric energy meters, and can monitor leakage current and have the power line carrier communication function, and can be applied to millions of households, and have a promotion value.

Description

Single-phase earth leakage monitoring equipment

One, technical field

The technical field of the leakage current detection of single-phase earth leakage watch-dog mainly at residential electricity consumption family, also relating to the technical fields such as electric energy metrical, anti-electricity-theft and electric line carrier communication, is anti-electricity-theft electric energy meter technology, the technical field of leakage current Detection Techniques together with electric line carrier communication Integration ofTechnology.

Two, background technology

Along with the raising of Living consumption, electricity is applied to the universal of household electrical appliances of all kinds from illumination, as refrigerator, washing machine, electric heater, TV and air-conditioning etc., increasing household electrical appliance enter family, have the place of consumer, just likely can leak electricity, because all electrical equipment all may produce leakage current, and very little leakage current likely can cause great harm, likely can cause serious consequence, such as electric shock, fire and device damage etc.

Even if when leakage current is very little, to real-time detect, just can get rid of abnormal leak current fault in advance, reduce the tripping operation of " short circuit residual current circuit breaker "; Further, the electricity consumer of cutting off the electricity supply easily is not allowed for some, can not adopt " short circuit residual current circuit breaker ", this equipment can be used to detect electric leakage and short circuit.Further, this equipment can in time electric leakage information by electric line carrier communication gives.

Single-phase earth leakage watch-dog can detect in the family of electricity consumer whether occur electric leakage in time, more small leakage current can be detected, and, this equipment can leak electricity information by power carrier communication to concentrator user in time, computer software system is sent to again by concentrator, software systems receive the laggard row relax of data, and staff can be sent to process to scene, the leakage current realizing electricity consumer can Real-Time Monitoring, the abnormal leakage current reaching excision electricity consumer in time and the object of fixing a breakdown, reach the object prevented trouble before it happens.

Since this equipment can be applied to huge numbers of families, so we allow this equipment have the electric energy meter function of anti-electricity-theft metering electric energy, can replace current electric energy meter, have electric power carrier communication function simultaneously, so this equipment has popularizes value in an all-round way.

Three, summary of the invention

The function of electric energy meter calculates the effective voltage of phase line and zero line and watt current and obtains active energy, but leakage current is the difference of the vector current of phase line and zero line, is not the difference of watt current.

Single-phase earth leakage watch-dog is the detecting function of the watt current of existing phase line and zero line, have the function of measuring of electric energy meter, there is again the detecting function of the difference of the vector current of phase line and zero line, namely the detecting function of leakage current is had, add and there is electric power carrier communication function, three's function all realizes inside an equipment, is exactly the summary of the invention of this equipment.

Four, accompanying drawing explanation

1, Fig. 1 is the fundamental diagram of single-phase earth leakage monitoring equipment

2, Fig. 2 is the wiring diagram of the connection terminal of single-phase earth leakage monitoring equipment

3, Fig. 3 is the pulse output map of the electric energy meter function of measuring of single-phase earth leakage monitoring equipment

4, Fig. 4 is the external zero-sequence transformer size block trrellis diagram of single-phase earth leakage monitoring equipment, external zero-sequence transformer dimensions is as follows, during wiring, the phase line of user and zero line input end are first received on 9 and 10 of the connection terminal of this equipment through the zero-sequence transformer center via hole of this equipment again.

5, Fig. 5 is the full screen display content graph of the LCDs of single-phase earth leakage monitoring equipment

6, Fig. 6 is the finished figure of single-phase earth leakage monitoring equipment

five, embodiment

First single-phase earth leakage monitoring equipment has the function of measuring of anti-electricity-theft electric energy meter, also there is the function such as leakage current detect function and electric power carrier wave remote communication, the functions such as metering, anti-electricity-theft, detection of electrical leakage, electric power carrier wave remote meter reading, infrared communication, LCD display, power test pulse output and electric power carrier wave remote communication can be realized.

This equipment has the remarkable advantages such as measuring accuracy is high, good stability, overload capacity are strong, reliability is high; can be power department and advanced, reliable metering outfit and leakage current detect are provided; its performance index meet the every technical requirement to single-phase electronic energy meter in GB/Z6829-2008 " General Requirements of aftercurrent action protecting electrical equipment " and GB/T17215.321-2008 " 1 grade and 2 grades of state type active electric energy meters ", and electric power carrier wave remote meter reading communication protocol meets DL/T-645-1997 communication protocol requirements.

1, principle of work

(1) a road circuit of single-phase earth leakage monitoring equipment is metering active energy, realize the effective voltage of real-time detection and calculating phase line and zero line, watt current and active energy, namely there is the function of measuring of electric energy meter, as the watt current 60mA larger than the watt current of phase line of zero line, think stealing.

(2) an other road of single-phase earth leakage monitoring equipment is used as leakage current detect, the difference of the vector current detected between phase line and zero line by a zero-sequence transformer converts the metering IC of voltage signal to electric leakage monitoring to, CPU measures leakage current by computing, when leakage current is greater than 25mA, think to have leaked electricity.

(3) single-phase earth leakage monitoring equipment delivers to the output device such as display section, power carrier communication part as required effective voltage, watt current, stealing electric current and leakage current.

2, the character of LCDs and the meaning of digitized representation

(1) full screen display 3 seconds when powering on.

(2) often (equally will show under power down mode) is shown under the low alarm condition of battery electric quantity normally do not show.

(3) equipment shows at communication state do not show at ordinary times.

(4) show when equipment is in cryptographic key protection state when ammeter is in key released state, lock can disappear.

(5) equipment divides two screen displays to show table number, and the first screen display shows the high 6 of table number, and the second screen display shows the low 6 of table number; Liquid crystal display also shows " table number " simultaneously.

(6) " V " representative voltage, display format is " XXXXX.X ", and X is magnitude of voltage, 1 decimal.

(7) " A " represents electric current, and display format is " XXXX.XX ", and X is current value, 2 decimals.

3, metering and leakage current detect function

(1) watch-dog that leaks electricity is divided into A, B two-phase, and A phase is phase line input, and B phase is zero line input, and when meritorious total electricity is measured in output, the phase choosing the higher value in Ia and Ib is measured, and reverse active energy is pressed forward electric energy and added up.

(2) when IB is greater than 60mA than IA electric current, think stealing state, amber light is lighted, and when IA is larger than IB electric current, and zero-sequence transformer detects the electric current being more than or equal to 25mA, thinks electric leakage state, and amber light glimmers.

(3) when detecting that electric leakage or power stealing are reported to the police, ammeter all can pass through carrier module active reporting electric leakage state or stealing state and leakage current to concentrator.

(4) when phase line and zero line connect instead, anti-phase pilot lamp is lighted.

(5) the accumulative meritorious total electricity in equipment resets by showing interior reset button.

4, Presentation Function

(1) under normal operating condition, electric energy meter carries out automatic wheel and shows, and every item number shows 6 seconds according to except ammeter electric energy, and other is taken turns aobvious item and shows 2 seconds, and the aobvious item of wheel is as follows:

First screen: device number is high six

Second screen: device number is low six

3rd screen: equipment metering electric energy (kWh)

4th screen: voltage (V)

5th screen: actual electric current (A)

6th screen: leakage current (A)

(2) show under power down mode: current accumulative active energy (kWh) always.

(3) next screen can be switched to by button in table.

(4) when battery electric quantity is not enough, liquid crystal display shows

(5) pulse signal lamp: have during electrical energy pulse and glimmer, no pulse is often bright.

(6) power carrier communication module could can only be plugged when equipment does not power on.

5, electric line carrier communication function

(1) electric line carrier communication stipulations meet DL/T645-1997 communication protocol.

(2) communication baud rate 1200bps, even parity check, repeater span≤500m.

(3) this equipment can send in accumulative total active energy, voltage, reality electric current, leakage current and state status.

(4) when equipment Inspection is to electric leakage state, can active be sent.

6, infrared communication function

(1) infrared communication stipulations meet DL/T645-1997 and to communicate anti-view.

(2) communication baud rate 1200bps, even parity check.

(3) can accumulative total active energy of this equipment of copy reading, voltage, reality electric current, leakage current and state status by infrared palm machine.

7, data storage function

Device interior storer can store accumulative total electricity consumption, and calibration parameter, the quantity of parameters such as table number, under powering-off state, data can not be lost.

8, install and press line

Equipment is arranged on the place of room ventilation drying, should be fixed on object that is firm, fire-resistant, that not easily shake, can on fixed base plate or wall with three screws, the good hole of subdrilling on base plate or wall.

Correctly should access phase line and the zero line of electricity consumer by wiring diagram, the inlead suggestion of connection terminal uses copper cash or copper sleeve, and the screw in connection terminal should be tightened, and guarantees this device security reliability service.

Claims

1. both had the detecting function of the measuring parameter such as effective voltage and watt current of electric energy meter, namely there is the function of electric energy meter, there is again the monitoring function of the leakage current of the difference of the vector current of phase line and zero line, have the monitoring function of leakage current, both function has all simultaneously inside an equipment.

2. both had the detecting function of the measuring parameter such as effective voltage and watt current of electric energy meter, namely there is the function of electric energy meter, there is again the monitoring function of the leakage current of the difference of the vector current of phase line and zero line, namely there is the monitoring function of leakage current, also have electric line carrier communication function, this three's function has all simultaneously inside an equipment.