CN2176613Y

CN2176613Y - Electric power measuring monitor

Info

Publication number: CN2176613Y
Application number: CN 93231320
Authority: CN
Inventors: 马德明; 靳殿武
Original assignee: LUXIAN COUNTY ELECTRONIC ELECTRICAL EQUIPMENT FACTORY
Current assignee: LUXIAN COUNTY ELECTRONIC ELECTRICAL EQUIPMENT FACTORY
Priority date: 1993-07-05
Filing date: 1993-07-05
Publication date: 1994-09-07
Anticipated expiration: 2003-07-05

Abstract

The utility model relates to an electric power measuring monitor, which is composed of a power supply, a switching amplification circuit, an executive circuit which are connected in sequence, a signal generation component and a signal processing circuit which are electrically connected in sequence with the switching amplification circuit, and each component is arranged in a housing. The upper bottom board and the lower bottom board of the utility model is respectively provided with an input terminal and an output terminal; the signal generation component is electromagnetic induction type, and an inductance coil is sheathed with an electric power measuring loop connection wire. The utility model has the advantages of novel design, reasonable structure, simple circuit and small size, the switching amplification circuit adopts integrated blocks, the monitoring range towards the electric power measuring error factor is wide, and therefore, the utility model in particular benefits for monitoring effectively various means of electricity stealing and finding whether the inner elements of a watt-hour meter are damaged.

Description

Electric power measuring monitor

The utility model belongs to the electrical apparatus technology scope, relates to a kind of monitoring three phase mains power electric-power metering mistake device.

Electric-power metering accurately whether, relate to the saving of electric energy and effectively utilize, also concerning the economic benefit and the national interests of management of power use department.For three phase mains, the kilowatt-hour meter inner member damages, particularly illegal stealing molecule adopts high-low pressure metering Current Transformer secondary loop short circuit, high-low pressure metering Current Transformer secondary circuit opens circuit, high-low pressure metering Current Transformer one, the secondary error-polarity connection, stride the kilowatt-hour meter wiring, the phase failure of high pressure measurement voltage transformer secondary, the phase failure of low-temperature measurement voltage, even deliberately strengthen load to kilowatt-hour meter, when burning means stealings such as Inside coil, the capital is reduced the electric energy of electric-power metering and is caused the metering mistake, have a strong impact on the reasonable utilization of electric energy and the economic benefit of management of power use department, the infringement national interests.For preventing lawless person's stealing, with usual employing meter cover and table tail-hood lead sealing, current transformer are locked in the way in the distribution board, but because electricity filching means is varied, this way can not fundamentally solve the stealing problem, therefore, look into to remove and stop lawless person's stealing and become very stubborn problem of management of power use department.Nineteen ninety, Ministry of Energy, the Ministry of Public Security sent the associating notice, required various places to take technological means as early as possible, were strictly on guard against the generation of stealing.Songxi County NO.2 Radio Factory, Fujian Prov.'s application number is 90204318.8, name is called the patent application of " three-phase anti-tamper device ", providing a kind of utilizes six current transformers to measure three-phase stealing electric current, six impedors composition power monitor circuits, simultaneously and transformer secondary output be connected into open delta and the signal system that constitutes, and be equipped with amplifying circuit, execution relay and power supply.This anti-electricity-theft device has solved the kilowatt-hour meter external cabling of low-voltage current mutual inductor metering preferably, electric current turnover line exchanges, broken string, shunting and voltage exchange, the problem that broken string carries out stealing, but the stealing of still uncontrollable direct access type kilowatt-hour meter (being unworthy of the current transformer metering), the stealing of high pressure measurement, stride kilowatt-hour meter wiring stealing, behaviors such as wilful damage kilowatt-hour meter inner member stealing, and because the use of impedor, electric energy loss is increased, impedor is connected to and does not also meet the rules requirement on the watt-hour meter voltage phase line, when distribution circuit electric voltage was uneven, misoperation also can take place in this device.

Task of the present utility model provides a kind of to high-low pressure metering Current Transformer secondary loop short circuit; open circuit and one; the secondary error-polarity connection; stride the kilowatt-hour meter wiring; the high pressure measurement voltage transformer secondary phase failure; low-temperature measurement voltage phase failure electricity filching behavior and kilowatt-hour meter inner member damage and cause the electric-power metering mistake; control effectively; electric-power metering mistake to direct access type kilowatt-hour meter (being unworthy of the current transformer metering) also can be effectively controlled; and can be to the phase failure of transformer high-voltage side; the electric-power metering watch-dog that distribution line single-line to ground fault and two-phase short circuit are protected is to overcome the above-mentioned shortcoming of existing in prior technology.

Task of the present utility model realizes with following scheme: it comprises housing, device power supply, amplifying circuit, execution relay, signal generator and signal processing circuit, input, output wiring terminal and reset button.Device power supply, amplifying circuit, execution relay are electrically connected in proper order, and signal generation branch, signal processing circuit to amplifying circuit are electrically connected, and it is induction that its main points are that signal generation is divided into, electromagnetic induction coil suit electric-power metering loop.Said electromagnetic induction coil also can be set with metering current loop and voltage circuit for an induction by current coil and a voltage induced coil, and the signal output part of two coils is after signal processing circuit and connect.Said amplifying circuit can be a switch amplifying circuit, and its switching circuit portion can adopt a switch integrated package.

Said device power supply can be that a transformer and a current rectifying and wave filtering circuit constitute, at this moment, and the elementary AC power that connects of transformer, secondary its current rectifying and wave filtering circuit that connects; This device power supply also can be a battery pack.

So the execution relay can be a relay, in view of supplying with the signal of telecommunication of carrying out relay is low-voltage signal, and must be with the situation of 380V or 220V control tripping mechanism, this execution relay also can be made of a signal relay and a relay of merely hitting, the normally opened contact of signal relay connects the auxiliary relay coil, thereby realizes low tension signal entering signal relay road, the auxiliary relay purpose with 380V or 220V control tripping mechanism.

For making watch-dog of the present utility model integrated, easy to install and use, said device power supply, amplifying circuit, execution relay, signal take place and signal processing circuit all is loaded in the housing, said input, output wiring terminal are installed in respectively on the base plate of said housing two ends, said reset button can be installed on the end face of housing, and is serially connected with in the auxiliary relay wire loop.

When the electric-power metering mistake occurring, during tripping mechanism work tripping operation outage, intuitive display, said housing, its end face can also be installed a tripping operation indicator light, and two contacts of this indicator light can connect respectively on two contacts of a pair of normally opened contact of said execution relay.

When the electric-power metering mistake, the signal generation branch in suit electric-power metering loop has signal to produce, this signal is after signal processing circuit is handled, send into amplifying circuit, signal amplifies, and makes the execution relay coil charged, the normally opened contact closure of this relay, then control the tripping mechanism tripping operation outage on the former distribution board, thereby realize the monitoring of the utility model the electric-power metering mistake.

The utility model modern design, rational in infrastructure, circuit is simple and direct, volume is little, be convenient to install and use; wide to electric-power metering mistake factor monitoring range; can both control effectively lawless person's multiple electricity filching means especially; and can find in time whether the kilowatt-hour meter inner member damages; also can protect the phase failure of transformer high-voltage side and the single-phase shorted to earth of distribution line and two-phase short circuit simultaneously, be a kind of desirable electric power measurement monitoring device that is better than other like products at present.

Fig. 1 is a front view of the present utility model

Fig. 2 is a vertical view

Fig. 3 is an end view

Fig. 4 is the vertical view of opening behind the cap

Fig. 5 is an electrical schematic diagram of the present utility model

Describe an embodiment of the present utility model in detail below in conjunction with accompanying drawing:

According to Fig. 1, Fig. 2, Fig. 3, shown in Figure 4, (8) are housings among the figure, device power supply (2), switch amplifying circuit (3) are housed in the housing, carry out relay (4), signal generation electromagnetic induction coil (5) and signal processing circuit (6), be equipped with on the base plate of housing (8) lower end output wiring terminal (7) is housed on input wires terminal (1), the top soleplate, the end face of housing (8) is equipped with reset button (10) and tripping operation indicator light (9).

According to shown in Figure 5: (2) are the device power supplys, this device power supply is made of a transformer and current rectifying and wave filtering circuit, the elementary of transformer connects AC power by binding post, the secondary current rectifying and wave filtering circuit that connects of transformer, 8 pin and 4 pin of the switch integrated package (NE555) of the positive termination switch amplifying circuit (3) of current rectifying and wave filtering circuit, connect the emitter of amplifying triode simultaneously, negative terminal connects 1 pin and signal relay coil one end of carrying out relay (4) of the integrated package of switch amplifying circuit (3), connects 5 pin of switch integrated package simultaneously through capacitor C 6; 3 pin of integrated package connect the ground level of amplifying circuit triode by resistance R 2 in the switching amplifier (3), and the collector electrode of amplifying triode connects the other end of carrying out relay coil; The a pair of normally opened contact of carrying out relay (4) is serially connected with the wire loop of trip switch in the disk body by output wiring terminal.The electric current electromagnetic induction coil suit metering circuit loop of signal generation branch (5); Its signal output part connects its signal processing circuit, voltage electromagnetic induction coil suit metered voltage loop, its signal output part connects its signal processing circuit, the signal that two induction coils produce is after dealing with circuit separately and connect, its positive termination switch integrated package 2 pin and 6 pin, negative terminal connects 1 pin of switch integrated package.

Claims

1, a kind of electric-power metering watch-dog comprises housing (8), device power supply (2), amplifying circuit (3), carries out relay (4), signal generation branch (5), signal processing circuit (6), input, output wiring terminal (1,7) and reset button (10).Device power supply (2), amplifying circuit (3), execution relay (4) order are electrically connected, signal generation branch (5), signal processing circuit (6) to amplifying circuit are electrically connected, it is characterized in that signal generation branch (5) for induction, electromagnetic induction coil suit electric-power metering loop.

2, watch-dog according to claim 1, it is characterized in that said signal generation branch (5), its electromagnetic induction coil has induction by current coil and voltage induced coil, be set with the current circuit and the voltage circuit of electric-power metering, the signal output part of two coils is after signal processing circuit and connect.

3, watch-dog according to claim 1 and 2 is characterized in that said amplifying circuit (3) is the switch amplifying circuit, and its switching circuit portion is a switch integrated package.

4, watch-dog according to claim 1 and 2 is characterized in that said device power supply (2), and it is made of a transformer and current rectifying and wave filtering circuit, the elementary AC power that connects of transformer, the secondary current rectifying and wave filtering circuit that connects.

5, watch-dog according to claim 1 and 2 is characterized in that said device power supply (2) is a battery pack.

6, watch-dog according to claim 1 and 2 is characterized in that said execution relay (4), and it is made of a signal relay and an auxiliary relay, and the normally opened contact of signal relay connects the coil of auxiliary relay.

7, watch-dog according to claim 1 and 2, it is characterized in that said device power supply (2), amplifying circuit (3), execution relay (4) and signal generation branch (5) and signal processing circuit (6) all are loaded in the said housing (8), said input wires terminal (1) and output wiring terminal (7) are loaded on respectively on the two ends base plate of housing (8).

8, watch-dog according to claim 1 and 2 is characterized in that said reset button (10), is installed on the end face of said housing (8), is serially connected with in the wire loop of carrying out relay.

9, watch-dog according to claim 1 and 2, it is characterized in that said housing (8) end face also is equiped with a tripping operation indicator light (9), two contacts of indicator light (9) connect respectively on two contacts of a pair of normally opened contact of said execution relay (4).