CN2117614U

CN2117614U - Safety electric power meter preventing charge evasion

Info

Publication number: CN2117614U
Application number: CN 91207684
Authority: CN
Inventors: 李永强; 梁飞
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-05-20
Filing date: 1991-05-20
Publication date: 1992-09-30

Abstract

Disclosed is a safety electric power meter for preventing charge evasion, comprising a rotating aluminous disc, an electric current coil L1 [1] and a voltage coil L2 [2]. The utility model is provided with an electric current transformer CT, an electronic switch [5] and a control switch K. The utility model has the advantages of reasonable design, high reliability, high sensitivity and good safety. The safety electric power meter concentrates watt-hour metering and power utilization protecting, and can prevent the occurrences of charge evasion and electric leakage, being an advanced multifunctional electric power meter.

Description

Safety electric power meter preventing charge evasion

The utility model relates to a kind of electricity consumption gauging table, and special is a kind of anti-theft security personnel's watt-hour meter.

At present, the household electricity metering is measured with single-phase active watt-hour meter (single-phase watt-hour meter), is a kind of Ferraris instrument, mainly forms by rotating aluminium dish and potential winding and current coil, and it is simple in structure, and it is more accurate to measure, and is the instrument of popularization and application.But watt-hour meter only has single function of measuring, and the user adopts and to tear the little hook method of voltage, shunting, earthing, exchange fire open, zero line and exchange the power stealing of live wire position and use; reducing watt-hour meter metering numeral can't Monitoring and Controlling; the infringement national interests do not have creepage protection function, and electricity consumption is dangerous.

The purpose of this utility model provides a kind of improved anti-theft security personnel's watt-hour meter, defends the national benefit and the electricity consumption personal safety.

The purpose of this utility model can realize by following measure: be provided with current transformer in anti-theft security personnel's watt-hour meter, the live wire in the watt-hour meter all passes current transformer with zero line and is connected gauge tap, and consumer is exported in the gauge tap wiring.Current transformer connects electronic switch, by the action of electronic switch control gauge tap.Normal electricity consumption is passed the live wire of current transformer and the size of current of zero line and is equated that direction is opposite in the watt-hour meter, resultant flux is zero, and current transformer does not have detection signal, the electronic switch attonity, and gauge tap is in closure state.When power stealing or electric leakage took place, the electric current that passes the live wire of current transformer and zero line in the watt-hour meter was unequal, and resultant flux is non-vanishing; current transformer produces detection signal; the electronic switch action drives the gauge tap tripping operation, and the output of cutting off the electricity supply realizes anti-theft and earth leakage protective function.

Concrete structure of the present utility model and embodiment are provided by the following drawings:

Fig. 1 is a circuit diagram of the present utility model.

The utility model is described in further detail below with reference to accompanying drawing, and with reference to Fig. 1, alternating current fire wire input pin ［ 1 ］ connects the current coil L of watt-hour meter ₁With potential winding L ₂, L ₁Another wiring meet gauge tap K after passing current transformer CT, the K switch line output pin ［ 2 ］ of starting to exchange fire, zero line input pin ［ 3 ］ connects potential winding L ₂, a wiring is not passed the mutual device CT of electric current with gauge tap K joins, K switch connecting to neutral line output pin ［ 4 ］, gauge tap K employing small air switch.Current transformer CT connects electronic switch ［ 5 ］, by electronic switch ［ 5 ］ control air switch K action.Normal electricity consumption, current transformer CT does not have detection signal, and air switch K is in closure state, and when power stealing or electric leakage situation occurring, current transformer CT produces detection signal, electronic switch ［ 5 ］ control air switch K tripping operation outage.With electric line normal after, the air switch K that closes can recover normal power supply.

Line construction of the present utility model is reasonable in design, and watt metering and electricity protection is comprehensive integrated, controls highly sensitively, and dependable performance is a kind of advanced person's a multi-function watt-hour meter.Popularize use, can prevent that the user from sneaking current, ensure national interests, prevent that the electric leakage accident from taking place, protection electricity consumption personal safety.

Claims

1, anti-theft security personnel's watt-hour meter is mainly by rotation aluminium dish, current coil L ₁With potential winding L ₂Form.It is characterized in that being provided with in the watt-hour meter current transformer CT, the live wire in the watt-hour meter with is connected gauge tap K after zero line all passes current transformer CT, current transformer CT connects electronic switch [5], electronic switch [5] gauge tap K moves.

2,, it is characterized in that gauge tap K is the small air switch according to claims 1 described watt-hour meter.