GB2280961A - Commodity metering apparatus - Google Patents
Commodity metering apparatus Download PDFInfo
- Publication number
- GB2280961A GB2280961A GB9320005A GB9320005A GB2280961A GB 2280961 A GB2280961 A GB 2280961A GB 9320005 A GB9320005 A GB 9320005A GB 9320005 A GB9320005 A GB 9320005A GB 2280961 A GB2280961 A GB 2280961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuse
- meter
- consumer
- metering apparatus
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R22/00—Arrangements for measuring time integral of electric power or current, e.g. electricity meters
- G01R22/06—Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
- G01R22/061—Details of electronic electricity meters
- G01R22/066—Arrangements for avoiding or indicating fraudulent use
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Measurement Of Current Or Voltage (AREA)
Description
2280961 COMMODITY METERING APPARATUS The present invention relates to
commodity metering apparatus and more particularly it relates to the metering of a electricity supply.
There are many known methods of defrauding the energy supplies, the basis of most being either to effect the registration of power on the consumer meter or to obtain power from a point prior to the place where consumed energy is registered. The operation of metering energy is carried out in two locations, and usually requires two current sensing devices. The use of two current sensing devices increases the opportunities available to possible to defraud.
The present invention overcomes these problems by the removal of one of the current sensing devices and makes use of existing equipment in the meter to perform the function of the removed current sensing device.
According to the present invention there is provided consumer metering apparatus comprising a consumer meter arranged to be connected to an electricity supply, wherein the live supply is supplied to the meter via a fuse, and the current passing through the fuse is monitored by current monitoring means forming part of said consumer meter, characterised in that comparison means is provided having a first input connected to the live supply, and a second input connected to the output of a fuse, and is arranged to detect the voltage drop across the fuse to produce a signal proportional to the consumed power.
The comparison means may be a differential amplifier, the output signal from which may be transmitted over a signalling system to the energy supplier.
An embodiment of the present invention will now be described with reference to the accompanying drawing.
Referring to the drawing, a consumer meter 2 is shown arranged to be connected to a main power supply by way of a live cable 4, a neutral cable 6. The neutral cable 6 passes directly through the meter to a load 8. The live cable 4 is connected to the input of a fuse 10, the output of which is connected through the meter to the load 8. The output of the fuse passes through a secondary current sensor 12. The output of the secondary current sensor 12 is connected to a current imbalance comparator circuit 14 via a two-wire pair, the operation of which is well known in the art. The input and the output of the fuse 10 is connected to a differential amplifier having two inputs, one of which is connected to the input and the output of the fuse respectively. The differential amplifier forms part of the current imbalance comparator circuit 14. The differential amplifier therefore measures the voltage drop across the fuse and this is used as a meteorological system to replace what would currently be known as the primary current sensor. Therefore, the fuse shunt voltage is used as an indication system.
The use of the voltage drop across the fuse and terminals of the meter provides a signal proportional to the consumed power. The output of the differential amplifier may activate an indicator or preferably be connected to a two way communication system k such as a Mains signalling system which could indicate to the electricity supplier that a fraud has been registered within the meter. Other forms of signalling systems may be a radio system, or a telephone base system. Alternatively, intelligent tokens could be used or pre-payment tokens, they include the necessary circuitry to register a possible fraud and in which case the information would be down loaded for comparison purposes.
The invention as described therefore provides information to enable personnel to visit the premises to verify that a fraud has been attempted.
A further advantage of the present invention is that by monitoring the voltage drop across the fuse, a possible fire hazard caused by heat developed in old fuse installations may be signalled.
The present invention detects the use of a black box across the metering terminals of the consumer meter, which would result b in a measured energy discrepancy between the supplied energy and the measured energy.
The present invention will also detect the application of a current shunt, whereby a wire is linked across the metering terminals to shunt some of the supplied energy without being metered, as will result in a discrepancy between the supplied energy and the measured energy.
If the neutral cable is cut to the consumer meter, the meter will be switched off and will no longer measure the consumed power. The time for which the meter will be switched off will be stored in the meter, which could be interrogated at a future date to ascertain if the meter has been without power at a time when the supply network was still active.
If the fuse is removed, this will result in a large voltage across the shunt measuring system, and this will be flagged as an unauthorised fuse removal. Any attempt to insert a dummy fuse with power tapped off the main would result in removal of the fuse and therefore a large voltage drop across shunt measuring system, and when the fuse is replaced, the removal will have been detected.
The sense wire may be provided with a neutral or earth shield so that in the event that this wire is shorted, damage will occur.
t
Claims (3)
1. Consumer metering apparatus comprising a consumer meter arranged to be connected to an electricity supply, wherein the live supply is supplied to the meter via a fuse, and the current passing through the fuse is monitored by current monitoring means forming part of said consumer meter, characterised in that comparison means is Provided having a first input connected to the live supply, and a second input connected to the output of a fuse, and is arranged to detect the voltage drop across the fuse to produce a signal proportional to the consumed power.
2_. Consumer metering apparatus as claimed in claim 1, wherein the comparison means is a differential amplifier, the output signal from which may be transmitted over a signalling system to the energy supplier.
3. Commodity metering apparatus, substantially as herein before described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB939316775A GB9316775D0 (en) | 1993-08-12 | 1993-08-12 | Improvements in or relating to metering |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9320005D0 GB9320005D0 (en) | 1993-11-17 |
| GB2280961A true GB2280961A (en) | 1995-02-15 |
| GB2280961B GB2280961B (en) | 1997-06-04 |
Family
ID=10740391
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB939316775A Pending GB9316775D0 (en) | 1993-08-12 | 1993-08-12 | Improvements in or relating to metering |
| GB9320004A Expired - Fee Related GB2280960B (en) | 1993-08-12 | 1993-09-28 | Commodity metering apparatus |
| GB9320006A Expired - Fee Related GB2280962B (en) | 1993-08-12 | 1993-09-28 | Commodity metering apparatus |
| GB9320005A Expired - Fee Related GB2280961B (en) | 1993-08-12 | 1993-09-28 | Commodity metering apparatus |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB939316775A Pending GB9316775D0 (en) | 1993-08-12 | 1993-08-12 | Improvements in or relating to metering |
| GB9320004A Expired - Fee Related GB2280960B (en) | 1993-08-12 | 1993-09-28 | Commodity metering apparatus |
| GB9320006A Expired - Fee Related GB2280962B (en) | 1993-08-12 | 1993-09-28 | Commodity metering apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (4) | GB9316775D0 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2325747A (en) * | 1997-05-03 | 1998-12-02 | Andrew Forrest | Electricity metering arrangement with integral cut-out means |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2302952A (en) * | 1995-07-06 | 1997-02-05 | C & C Technology Enterprises | Electrical power consumption control and evaluation system |
| IL125327A0 (en) * | 1998-07-13 | 1999-03-12 | Powercom Control Systems Ltd | A device for detecting and reporting theft of electric power |
| WO2000033091A1 (en) * | 1998-11-27 | 2000-06-08 | Andrew Forrest | Electricity measuring apparatus |
| GB2347225A (en) * | 1999-02-25 | 2000-08-30 | C K Electronics Sdn Bhd | Electric utility meter with means to detect and report theft |
| CN101191802B (en) * | 2006-12-01 | 2010-09-15 | 上海贝岭股份有限公司 | Electric energy metering chip creeping prevention method |
| CN100425995C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| CN100425994C (en) * | 2006-12-06 | 2008-10-15 | 北京中星微电子有限公司 | Circuit and method for preventing shunt running in electric energy measurement |
| BRPI0705720A2 (en) * | 2007-10-23 | 2009-06-23 | Queiroz Silva Renato De | (cat catch) - intelligent self-tracking differential system (processes, components and schematics) supervised by gps or reverse geocoding |
| FR2983301B1 (en) * | 2011-11-28 | 2014-08-01 | Schneider Electric Ind Sas | METHOD AND DEVICE FOR DETECTING A SHUNT BETWEEN INPUT AND POWER OUTPUT OF AN ELECTRICAL CONSUMPTION COUNTER |
| GB201417713D0 (en) * | 2014-10-07 | 2014-11-19 | Schneider Electric Ltd | Cut-out assembly |
| FR3035278B1 (en) * | 2015-04-14 | 2018-04-27 | Sagemcom Energy & Telecom Sas | METHOD FOR DETECTING FRAUD IN AN ELECTRICITY SUPPLY NETWORK |
| US10598703B2 (en) | 2015-07-20 | 2020-03-24 | Eaton Intelligent Power Limited | Electric fuse current sensing systems and monitoring methods |
| CN105911321A (en) * | 2016-07-08 | 2016-08-31 | 华北电力大学 | Electrical parameter transmission relationship-based T-type connection line electricity stealing identification for power distribution network |
| CN106443113B (en) * | 2016-09-06 | 2019-04-09 | 国网山东省电力公司临朐县供电公司 | A kind of quick-mounting formula electricity stealing preventive metering Determination instrument |
| CN107621562B (en) * | 2017-07-21 | 2019-04-16 | 国网浙江省电力公司 | A kind of single-phase meter shunting accurate judgement method for analyzing stealing |
| US11289298B2 (en) | 2018-05-31 | 2022-03-29 | Eaton Intelligent Power Limited | Monitoring systems and methods for estimating thermal-mechanical fatigue in an electrical fuse |
| US11143718B2 (en) | 2018-05-31 | 2021-10-12 | Eaton Intelligent Power Limited | Monitoring systems and methods for estimating thermal-mechanical fatigue in an electrical fuse |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225867A (en) * | 1988-12-07 | 1990-06-13 | Alan Joseph Mutch | Detecting tampering with metered supplies |
-
1993
- 1993-08-12 GB GB939316775A patent/GB9316775D0/en active Pending
- 1993-09-28 GB GB9320004A patent/GB2280960B/en not_active Expired - Fee Related
- 1993-09-28 GB GB9320006A patent/GB2280962B/en not_active Expired - Fee Related
- 1993-09-28 GB GB9320005A patent/GB2280961B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2225867A (en) * | 1988-12-07 | 1990-06-13 | Alan Joseph Mutch | Detecting tampering with metered supplies |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2325747A (en) * | 1997-05-03 | 1998-12-02 | Andrew Forrest | Electricity metering arrangement with integral cut-out means |
| GB2325747B (en) * | 1997-05-03 | 2001-08-01 | Andrew Forrest | Electricity measuring apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2280960B (en) | 1997-01-29 |
| GB9320006D0 (en) | 1993-11-17 |
| GB2280962B (en) | 1997-06-04 |
| GB2280962A (en) | 1995-02-15 |
| GB9320004D0 (en) | 1993-11-17 |
| GB9320005D0 (en) | 1993-11-17 |
| GB2280960A (en) | 1995-02-15 |
| GB2280961B (en) | 1997-06-04 |
| GB9316775D0 (en) | 1993-09-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020928 |