CN86208724U

CN86208724U - Monitor for civil kilowatt-hour meter

Info

Publication number: CN86208724U
Application number: CN 86208724
Authority: CN
Inventors: 欧阳谊明; 欧阳炘明; 李奕晖
Original assignee: Individual
Current assignee: Individual
Priority date: 1986-11-05
Filing date: 1986-11-05
Publication date: 1987-07-01

Abstract

The utility model relates to a monitor for civil kilowatt-hour meter with low cost and the functions of displaying and recording, being suitable to continuously monitor and record various electricity stealing behaviors, and aiming to put the electricity stealing behaviors that lack effective monitoring to an end. The monitor for civil kilowatt-hour meter comprises a probe head and a body, which are respectively connected in series to the kilowatt-hour meter installed in and out of the room of a user and the live wire. The electricity stealing behaviors are displayed by means of the principle of the same electric current and the bridge balance, and can also be recorded for checking. The monitor for civil kilowatt-hour meter is characterized in unauthorized removing prevention and external interference prevention, has easy and convenient installation, and has no impact on the correct measurement of the original kilowatt-hour meter.

Description

Monitor for civil kilowatt-hour meter

The utility model is a kind of monitor of civil watt-hour meter of touching upon.

China now adopts the power consumption of the single-phase watt-hour meter amount of note each household, because of most of watt-hour meter are installed in the user family, the people that part lacks social morality seizes the opportunity artificial manufacturing table more, the current coil that is about in the watt-hour meter is carried out short circuit from outside lead, make the indication of this family watt-hour meter be less than actual power consumption, each family watt-hour meter sum takes place immediately less than total watt-hour meter indication, its difference is often divided by the each household under total watt-hour meter, the civil disputation that causes thus and total watt-hour meter happen occasionally because of the phenomenon that overload burns out, up to the present, still there is not a kind of device that can effectively monitor and write down table more.

The purpose of this invention is to provide a kind of simple and feasible electrical equipment cheaply and pen recorder, civil watt-hour meter is got over table power stealing watch-keeping and record.

The civil watt-hour meter monitor that the utility model provides, it is characterized in that this device has two Subminiature current transformers that no-load voltage ratio is identical, utilize same electric current and bridge balance principle, divide two parts to be serially connected in the load live wire: one of them mutual inductor is serially connected on the watt-hour meter end of incoming cables of user Men Nei, be called for short probe, be integrated with this watt-hour meter, and reflect the working condition of meter current coil by an additional lead; Another mutual inductor is added with the alarm indication circuit and is serially connected in confession supervision in user's live wire outdoors, and is integrated with the alarm indication record, is called for short main body.Alarm indication record adopts a small amount of common photosensitive paper, to the record that exposes of the alert light of statistical tables and reports more, for examining.Said apparatus is installed does not all influence the correct metering of former watt-hour meter.

Performance of the present utility model is elaborated by accompanying drawing.

Accompanying drawing is electric principle and probe and watt-hour meter connection layout.

When watt-hour meter 6 operate as normal, current transformer 1 flows through identical electric current with 2 former sides, and two pairs of also proportional R of voltage that the side produces ₁/ R ₂,

current transformer

1,2, R like this ₁, R ₂The bridge balance of forming, the input voltage of alarm indication this moment device 3 are zero not work.When showing more; the live wire inlet wire 8 and the outlet 9 that are watt-hour meter 6 are joined; the current transformer 1 former side who makes the current coil 5 of watt-hour meter 6 and be close to therewith is by short circuit; at this moment the balance of electric bridge is destroyed; will there be certain input voltage at alarm indication device 3 two ends and send light and report to the police; this warning light is fixed on red transparency protected thing 11 on the main body cover 10 by small pieces and is reflected to beyond the main body cover 10, also is hidden in 12 records of sensitized paper in the main body cover 10 simultaneously.When table dismounting more, electric bridge promptly restores balance, and alarm indication also stops.

If this monitor additional lead 4 cut off or with outlet 9 or inlet wire 8 short circuits of additional lead 4 with ammeter 6, the bridge balance of this monitor is same destroyed and alarm indication takes place, so this device has the self-defence function.Current transformer 1 and watt-hour meter 6 are integrated to be sealed up by the plate screw bolt 7 of former watt-hour meter 6 and guarantee.To rare commutation and fiery ground power stealing behavior, the bridge balance of this device is by havoc, and can report to the police and record equally.

Single-phase watt-hour meter at present used 2.5A to 5A carries out watch-keeping and record, further specifies with an embodiment, and

current transformer

1,2 is identical, is 24mm at sectional area ²E type silicon sheet core on, as paying the side, pay a square direct current resistance is 18 Ω to the enameled wire that adopts φ 0.2mm around 700 circles; Enameled wire with φ 1.2mm is former side around 20 circles again, and former side's direct current resistance is 0.03 Ω.R ₁=R ₂=430 Ω 1/8W carbon resistance films; alarm indication device 3 is the common light emitting diode of a non-redness; main body cover 10 is made by black bakelite or plastics etc.; red transparency protected thing 11 is made and is bonded on the preformed hole of main body cover 10 by plastics or organic glass; sensitized paper 12 adopts a small amount of banded common black-and-white photography paper or enlarging paper; the form of above device by accompanying drawing assembled up, just can reach the purpose of single-phase watt-hour meter being carried out watch-keeping and record fully.

The former resistance per square of two groups of current transformers of this monitor is minimum, power consumption hardly under normal operation, and two former side outer end maximum pressure drop are 0.1V actually.

Claims

1, a kind of civil watt-hour meter monitor, have two Subminiature current transformers that no-load voltage ratio is identical, it is characterized in that this device utilizes same electric current and bridge balance principle, divide two parts to be serially connected in the live wire, one of them current transformer is serially connected on the end of incoming cables of user's watt-hour meter, be integrated with this watt-hour meter, be used for reflecting the working condition of current coil in the watt-hour meter; Another current transformer is added with warning circuit and is serially connected in and can monitors away from supplying in the live wire of this watt-hour meter.

2,, it is characterized in that it is that segmentation is serially connected in the live wire, has the self-defence ability according to the monitor of claim 1.

3,, it is characterized in that it connects one and is used for the alert warning circuit of statistical tables and reports more according to the monitor of claim 2.

4,, it is characterized in that its employing photosensitive material goods record light warning according to the monitor of claim 3.

5,, it is characterized in that the shell that its one of employing can resist extraneous light to disturb according to the monitor of claim 4.