CN2101242U

CN2101242U - Energy saving kilowatt-hour meter

Info

Publication number: CN2101242U
Application number: CN 91206168
Authority: CN
Inventors: 林谱光
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-04-13
Filing date: 1991-04-13
Publication date: 1992-04-08

Abstract

An ordinary electric meter has the advantage of simple structure, but the ordinary electric meter has the obvious defect that a group of coils is switched on always whether electricity is used, and therefore, a large amount of electrical energy is consumed for years and months. An energy saving electric meter uses a thyristor for controlling the coils to switch on or off through testing whether current output exists in the electric meter to eliminate no-load current consumption. The utility model has the advantages of less element adoption, simple circuit and maintenance of performance and advantages of the ordinary electric meter.

Description

Energy saving kilowatt-hour meter

In the world of current electricity, watt-hour meter has entered huge numbers of families, and it is with simple structure, accurate measurement, and advantage such as durable in use is firmly got the user and is trusted.Therefore, its some shortcomings part is just ignored by people for a long time, as no burglar-proof measure, and no overload protection and unloaded power consumption or the like.In today that science and technology becomes better and approaching perfection day by day, these problems can not be ignored.At present, the overload protection measure is applied in some places, and burglar-proof measure also has consideration, and still, the unloaded power consumption problem of watt-hour meter does not also cause people's attention.Energy-saving kilowatt-hour meter promptly is a kind of utility model watt-hour meter that does not have unloaded power consumption.

Figure one is the circuit theory diagrams of common single-phase watt-hour meter.Mainly constitute by drive coil L1 and drive coil L2.As can be seen from Figure, no matter whether electricity consumption of user, drive coil L1 is a normal open, and the power consumption about 13 watts is arranged.When electricity consumption, watt-hour meter will be counted, and it is necessary consuming some electric energy, and non-electric the time, consumed power there is no need, and most of users' the non-electricity consumption time ratio electricity consumption time is much longer, therefore, eliminates wasting of watt-hour meter and necessitates.And the development of modern electronic technology, as if no longer allow such waste and make this class problem of solution become possibility.Energy-saving kilowatt-hour meter is exactly to design for this reason.

Energy-saving kilowatt-hour meter is to design on the basis of principle that does not change the common electrical kilsyth basalt and structure.It mainly is connected in series on the live wire B and zero line A of watt-hour meter input end with a bidirectional triode thyristor CR and drive coil L1, and by whether electricity consumption detects to the user, control silicon controlled break-make and eliminate that it wastes.Circuit theory is shown in figure two.Reducing transformer D plays the effect that improves the controllable silicon trigger voltage among the figure.Reducing transformer D is serially connected with in the circuit with drive coil L2.When user power utilization, drive coil L2 has electric current to flow through, and produces a pressure drop together with reducing transformer D, and this pressure drop is extremely gone up by the control that resistor R is added to controllable silicon CR, triggers the controllable silicon conducting, the watt-hour meter counting.When non-electricity consumption, D and L2 do not have pressure drop, and controllable silicon ends, and the last no current of L1 passes through, and wastes thereby eliminated.

For single-phase watt-hour meter, controllable silicon CR selects the above pipe of the withstand voltage 400V of working current 1A to get final product.The resistance of R is got 20 to 47 Ω and is advisable.Reducing transformer D can constitute with two diode D1 and D2 reversal connection, shown in figure three (a), but in order to draw materials and the easy for installation available one two-way controlled formation shown in figure three (b) that is connected into, a and b are respectively reducing transformer D input, output terminal among the figure, and working current is selected according to the rated current of watt-hour meter.

Around this principle, also can be made into the loss-free three phase watt-hour meter.But three phase watt-hour meter generally as summary table, does not have idle time substantially.Therefore, there are not much necessary three-phase loss-free watt-hour meter of producing.

Claims

1, a kind of energy-saving kilowatt-hour meter comprises drive coil L1, and drive coil L2 and controllable silicon CR is characterized in that: be connected in after controllable silicon CR and drive coil L1 are connected in series on the zero line A and live wire B of watt-hour meter input end again.