DE20112485U1 - Device for measuring the flowing electrical current in at least one electrical conductor - Google Patents

Device for measuring the flowing electrical current in at least one electrical conductor

Info

Publication number
DE20112485U1
DE20112485U1 DE20112485U DE20112485U DE20112485U1 DE 20112485 U1 DE20112485 U1 DE 20112485U1 DE 20112485 U DE20112485 U DE 20112485U DE 20112485 U DE20112485 U DE 20112485U DE 20112485 U1 DE20112485 U1 DE 20112485U1
Authority
DE
Germany
Prior art keywords
electrical
measuring
arrangement
protection
interval
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.)
Expired - Lifetime
Application number
DE20112485U
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Enseco De GmbH
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to DE20112485U priority Critical patent/DE20112485U1/en
Publication of DE20112485U1 publication Critical patent/DE20112485U1/en
Priority to EP02016020A priority patent/EP1278073A1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R21/00—Arrangements for measuring electric power or power factor
    • G01R21/133—Arrangements for measuring electric power or power factor by using digital technique
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G01R19/252—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques using analogue/digital converters of the type with conversion of voltage or current into frequency and measuring of this frequency
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
    • G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measurement Of Current Or Voltage (AREA)

Description

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßt The description text was not recorded electronically  

Der Beschreibungstext wurde nicht elektronisch erfaßtThe description text was not recorded electronically

Claims (1)

1. Einrichtung zur Messung des fließenden elektrischen Stromes in mindestens einem elektrischen Leiter, der mit wenigstens einem elektrischen Verbraucher verbunden ist, mit folgenden Merkmalen:
  • - einem in den elektrischen Leiter (L) zum elektrischen Verbraucher geschaltetem niederohmigen Messwiderstand (1),
    • - einer mit dem niederohmigen Messwiderstand (1) verbundenen, den im elektrischen Leiter fließenden elektrischen Strom dadurch messenden und diese Messwerte in äquivalente elektrische Impulsfolgen wandelnden Anordnung (2),
    • - zum Ersten mit der Anordnung (2) verbundenen, zum Zweiten die elektrische Impulsfolge in Messintervallen zählenden, das Ergebnis des Messintervalls aus einer gegenüber einer elektrischen Impulsfolge einer Referenzeinrichtung bei der Kalibrierung der Anordnung (2) vergleichenden, damit den Messfehler als Anzahl von Impulsen der Anordnung (2) gegenüber der Referenzeinrichtung feststellbaren, diese Anzahl von Impulsen des Messfehlers im Messintervall zuordnenden und bei Abweichungen durch Unterdrückung oder Ergänzung der Impulsfolge im Messintervall korrigierenden,
      zum Dritten die Messintervalle aufsummierenden und
      zum Vierten diese Summe nach vorgegebenen Merkmalen zuordnenden Steuer- und Verarbeitungseinrichtung (3) und
    • - einer mit einer elektrischen Energiequelle, der Anordnung (2) und der Steuer- und Verarbeitungseinrichtung (3) zusammengeschalteten Stromversorgungseinheit (6).
    • - Einrichtung nach Schutzanspruch 1, dadurch gekennzeichnet, dass die Anordnung (2) mit dem mindestens einen elektrischen Leiter (L) und einem Bezugspotential (N) so zusammengeschaltet ist, dass das eine neben dem elektrischen Strom gleichzeitig die anliegende elektrische Spannung messende Anordnung (2) ist, dass das weiterhin eine die Messwerte des fließenden elektrischen Stromes und der dazu anliegenden elektrischen Spannungen in äquivalente elektrische Impulsfolgen der Leistung wandelnde Anordnung (2) ist und dass der niederohmige Messwiderstand (1), die Anordnung (2), die Steuer- und Verarbeitungseinrichtung (3) und die Stromversorgungseinheit (6) ein elektronischer Energiezähler ist.
    • - Einrichtung nach Schutzanspruch 1 oder den Schutzansprüchen 1 und 2, dadurch gekennzeichnet, dass die Anordnung (2) mit einem zum Ersten in Messintervallen die elektrische Impulsfolge zählenden, einem entsprechend einem Messfehler wenigstens eines Messbereiches der Anordnung (2) vorgegebenen und/oder vorgebbaren Wert oder Energiewert der gezählten Impulsfolge je Messintervall zuordnenden und das Messintervall bei Abweichungen des vorgegebenen und/oder vorgebbaren Wertes oder Energiewertes entsprechend des Messbereiches im Messintervall korrigierenden, zum Zweiten die Messintervalle aufsummierenden und zum Dritten diese Summe nach vorgegebenen Merkmalen zuordnenden Steuer- und Verarbeitungseinrichtung (3) zusammengeschaltet ist.
    • - Einrichtung nach Schutzanspruch 1 oder den Schutzansprüchen 1 und 2, dadurch gekennzeichnet, dass das eine die innerhalb von mindestens einem Messbereich zahlenmäßig vorbestimmte und bei der Inbetriebnahme in einer Speichereinheit der Verarbeitungseinheit fest installierte und nicht manipulierbare Impulszahl im Messintervall, wobei in jedem Messintervall gleichzeitig der fließende elektrische Strom und die dabei anliegende elektrische Spannung gemessen wird, innerhalb der Impulsfolge des Messintervalls einer aktuellen Messung, wobei ein Energiewert im Zeitbereich des Messintervalls zugeordnet wird, unterdrückende oder ergänzende Steuer- und Verarbeitungseinrichtung (3) ist.
    • - Einrichtung nach Schutzanspruch 4, dadurch gekennzeichnet, dass das Messintervall in n Unterintervalle aufgeteilt ist, dass die zu unterdrückenden oder zu ergänzenden Impulse in den n-1 Unterintervallen und dass der Rest der zu unterdrückenden oder zu ergänzenden Impulse insbesondere im letzten Unterintervall gleichverteilt sind.
    • - Einrichtung nach Schutzanspruch 2, dadurch gekennzeichnet, dass die Anordnung (2) aus einem mit dem elektrischen Leiter (L) und dem Nullleiter (N) verbundenen ersten Analog- Digital-Umsetzer, einem mit zwei Abgriffen eines in den elektrischen Leiter geschalteten niederohmigen Messwiderstandes verbundenen zweiten Analog-Digital-Umsetzers, einem den Analog-Digital-Umsetzern nachgeschalteten digitalen Multiplizierer und Leistungs-Frequenz- Wandler besteht.
    • - Einrichtung nach Schutzanspruch 1, dadurch gekennzeichnet, dass bei mehreren elektrischen Leitern (L1, L2, L3) zu wenigstens einem Verbraucher jeweils ein niederohmiger Messwiderstand (1) in einen elektrischen Leiter (L1, L2, L3) geschalten ist, dass jeweils ein niederohmiger Messwiderstand (1) mit einer Anordnung (2) verbunden ist und dass die Anordnungen (2) mit einer Steuer- und Verarbeitungseinrichtung (3) zusammengeschaltet sind.
1. Device for measuring the flowing electrical current in at least one electrical conductor, which is connected to at least one electrical consumer, with the following features:
  • a low-resistance measuring resistor ( 1 ) connected to the electrical consumer in the electrical conductor (L),
    • - an arrangement ( 2 ) connected to the low-resistance measuring resistor ( 1 ), measuring the electrical current flowing in the electrical conductor and converting these measured values into equivalent electrical pulse trains,
    • - Firstly connected to the arrangement ( 2 ), secondly counting the electrical pulse sequence in measuring intervals, comparing the result of the measuring interval from an electrical pulse sequence of a reference device when calibrating the arrangement ( 2 ), so that the measuring error as the number of pulses Arrangement ( 2 ) that can be determined with respect to the reference device, assigning this number of pulses of the measurement error in the measurement interval and correcting them in the event of deviations by suppressing or supplementing the pulse sequence in the measurement interval,
      thirdly, sum up the measuring intervals and
      fourthly, this sum is assigned to the control and processing device ( 3 ) and
    • - One with an electrical energy source, the arrangement ( 2 ) and the control and processing device ( 3 ) interconnected power supply unit ( 6 ).
    • - Device according to protection claim 1, characterized in that the arrangement ( 2 ) with the at least one electrical conductor (L) and a reference potential (N) is interconnected so that the one next to the electrical current at the same time measuring the applied electrical voltage arrangement ( 2nd ) is that this is still an arrangement ( 2 ) converting the measured values of the flowing electrical current and the associated electrical voltages into equivalent electrical pulse sequences of the power and that the low-impedance measuring resistor ( 1 ), the arrangement ( 2 ), the control and Processing device ( 3 ) and the power supply unit ( 6 ) is an electronic energy meter.
    • - Device according to protection claim 1 or protection claims 1 and 2, characterized in that the arrangement ( 2 ) with a first counting the electrical pulse train in measuring intervals, a predetermined and / or predeterminable value corresponding to a measurement error of at least one measuring range of the arrangement ( 2 ) or energy value of the counted pulse sequence for each measuring interval and the measuring interval in the event of deviations from the specified and / or specifiable value or energy value correcting in accordance with the measuring range in the measuring interval, secondly adding up the measuring intervals and thirdly assigning this sum according to predetermined characteristics ( 3 ). is interconnected.
    • - Device according to protection claim 1 or protection claims 1 and 2, characterized in that the one in the measurement interval, which is numerically predetermined within at least one measuring range and permanently installed during commissioning in a storage unit of the processing unit, with the measurement interval being simultaneous in each measurement interval flowing electrical current and the electrical voltage applied is measured within the pulse sequence of the measurement interval of a current measurement, an energy value being assigned in the time range of the measurement interval, is a suppressing or supplementary control and processing device ( 3 ).
    • - Device according to protection claim 4, characterized in that the measurement interval is divided into n subintervals, that the pulses to be suppressed or supplemented in the n-1 subintervals and that the rest of the pulses to be suppressed or supplemented are evenly distributed, particularly in the last subinterval.
    • - Device according to protection claim 2, characterized in that the arrangement ( 2 ) from a with the electrical conductor (L) and the neutral conductor (N) connected first analog-digital converter, one with two taps of a low-resistance measuring resistor connected in the electrical conductor connected second analog-to-digital converter, a digital multiplier connected downstream of the analog-to-digital converters and power-frequency converter.
    • - Device according to protection claim 1, characterized in that in the case of several electrical conductors (L1, L2, L3) a low-resistance measuring resistor ( 1 ) is connected to at least one consumer in an electrical conductor (L1, L2, L3), that in each case a low-resistance Measuring resistor ( 1 ) is connected to an arrangement ( 2 ) and that the arrangements ( 2 ) are connected to a control and processing device ( 3 ).
DE20112485U 2001-07-20 2001-07-20 Device for measuring the flowing electrical current in at least one electrical conductor Expired - Lifetime DE20112485U1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE20112485U DE20112485U1 (en) 2001-07-20 2001-07-20 Device for measuring the flowing electrical current in at least one electrical conductor
EP02016020A EP1278073A1 (en) 2001-07-20 2002-07-18 Device for measuring the electrical current flowing through at least an electrical conductor and method for error correction in such a device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE20112485U DE20112485U1 (en) 2001-07-20 2001-07-20 Device for measuring the flowing electrical current in at least one electrical conductor

Publications (1)

Publication Number Publication Date
DE20112485U1 true DE20112485U1 (en) 2001-10-25

Family

ID=7959838

Family Applications (1)

Application Number Title Priority Date Filing Date
DE20112485U Expired - Lifetime DE20112485U1 (en) 2001-07-20 2001-07-20 Device for measuring the flowing electrical current in at least one electrical conductor

Country Status (1)

Country Link
DE (1) DE20112485U1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1278073A1 (en) * 2001-07-20 2003-01-22 ENSECO GmbH Device for measuring the electrical current flowing through at least an electrical conductor and method for error correction in such a device
EP1278071A2 (en) * 2001-07-20 2003-01-22 ENSECO GmbH Apparatus for measuring the electrical current circulating in at least one electrical conductor and method of correcting faults in such apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1278073A1 (en) * 2001-07-20 2003-01-22 ENSECO GmbH Device for measuring the electrical current flowing through at least an electrical conductor and method for error correction in such a device
EP1278071A2 (en) * 2001-07-20 2003-01-22 ENSECO GmbH Apparatus for measuring the electrical current circulating in at least one electrical conductor and method of correcting faults in such apparatus
EP1278071A3 (en) * 2001-07-20 2004-02-11 ENSECO GmbH Apparatus for measuring the electrical current circulating in at least one electrical conductor and method of correcting faults in such apparatus

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Legal Events

Date Code Title Description
R207 Utility model specification

Effective date: 20011129

R081 Change of applicant/patentee

Owner name: ENSECO GMBH, DE

Free format text: FORMER OWNER: MEYER, GERHARD, DR.-ING., 16356 EICHE, DE

Effective date: 20020731

R150 Term of protection extended to 6 years

Effective date: 20041221

R157 Lapse of ip right after 6 years

Effective date: 20080201