DE579413C - Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit - Google Patents

Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Info

Publication number
DE579413C
DE579413C DEP66069D DEP0066069D DE579413C DE 579413 C DE579413 C DE 579413C DE P66069 D DEP66069 D DE P66069D DE P0066069 D DEP0066069 D DE P0066069D DE 579413 C DE579413 C DE 579413C
Authority
DE
Germany
Prior art keywords
measuring device
alternating current
power factor
bridge circuit
variable
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
Application number
DEP66069D
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.)
ERWIN PAUL
Original Assignee
ERWIN PAUL
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 ERWIN PAUL filed Critical ERWIN PAUL
Priority to DEP66069D priority Critical patent/DE579413C/en
Application granted granted Critical
Publication of DE579413C publication Critical patent/DE579413C/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R17/00—Measuring arrangements involving comparison with a reference value, e.g. bridge

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)

Description

Meßeinrichtung zur Bestimmung vonWechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors in Brückenschaltung Gegenstand des Patents 550 777 ist eine Meßeinrichtung zur Bestimmung von Wechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors in Brükkenschaltung, die dadurch gekennzeichnet ist, daß in dem einen Brückenzweig der Verbrauchswiderstand, z. B. der Lautsprecher; in Serie mit einem Hitzdrahtwattmeter und im anderen Zweig zwei Normalwiderstände liegen, während in die Diagonale der Brücke ein Galvanometer gelegt ist, das auf den jeweiligen Wirkwiderstand des Verbrauchers geeicht ist. Zu diesem Zwecke ist vorher die Eichung des Brückeninstrumentes mit Gleichstrom in Ohm notwendig, indem für den Verbrauchswiderstand des einen Brückenzweiges ein veränderlicher Normalwiderstand geschaltet wird.Measuring device for determining AC power of variable frequency and variable power factor in bridge circuit The subject of patent 550 777 is a measuring device for determining AC power of variable frequency and variable power factor in bridge circuit. B. the speaker; in series with a hot wire wattmeter and in the other branch there are two standard resistances, while a galvanometer is placed in the diagonal of the bridge, which is calibrated to the respective effective resistance of the consumer. For this purpose, the bridge instrument must first be calibrated with direct current in ohms by switching a variable normal resistance for the consumption resistance of one branch of the bridge.

Eine derartige Eichung bedingt, daß später bei der Belastung des zu untersuchenden Verbrauchswiderstandes mit Wechselstrom die gleiche Spannung zugeführt wird und zur Feststellung der verbrauchten Leistung stets vorher der Widerstand des Verbrauchers bekannt bzw. vom Brückeninstrument abgelesen werden muß. Will man dem zu untersuchenden Widerstand verschiedene Spannungen aufdrücken, so muß auch das Brükkeninstrument vorher verschiedene Gleichstromeichungen erhalten, oder es müssen für die jeweiligen Ausschläge Abhängigkeitstabellen von, der Spannung angefertigt werden.Such a calibration requires that later when loading the to The same voltage is supplied to the load resistance to be examined with alternating current and to determine the power consumed, always use the resistance beforehand known to the consumer or must be read from the bridge instrument. Do you want Impose different voltages on the resistance to be investigated, so must the bridge instrument received various DC calibrations beforehand, or it Tables of dependency on the voltage must be prepared for the respective deflections will.

Wird dagegen nach vorliegender Erfindung das in der Brückendiagonale liegende G#alvanometer außerdem auch noch auf den Eigenverbrauch in Watt geeicht, so kann man die Wechselstromleistung des Verbrauchers auch ohne Kenntnis seines augenblicklichen Wirkwiderstandes und unabhängig von der Größe der angelegten Spannung bestimmen nach der Formel wobei Nj der abzulesende Eigenverbrauch des Brückeninstrumentes, Rj dessen Widerstand, Rw der Widerstand des Hitzdrahtwattmeters W und i der Strom und Nw der Eigenverbrauch von W sind.If, on the other hand, according to the present invention, the G # alvanometer located in the bridge diagonal is also calibrated to its own consumption in watts, the alternating current power of the consumer can also be determined using the formula without knowing its instantaneous effective resistance and independently of the magnitude of the applied voltage where Nj is the self-consumption of the bridge instrument to be read, Rj is its resistance, Rw is the resistance of the hot-wire wattmeter W and i is the current and Nw is the self-consumption of W.

Man erspart also eine vorherige Eichung von I mit Gleichstrom in Abhängigkeit von verschiedenen Spannungen, wodurch eine größere Verwendungsmöglichkeit der Meßeinrichtung _ gestattet ist.A previous calibration of I with direct current as a function is thus saved of different voltages, thereby increasing the possibility of using the measuring device _ is permitted.

Claims (1)

PATENTANSPRUCH MeBeinrichtung zur Bestimmung von Wechselstromleistungen veränderlicher Frequenz und veränderlichen Leistungsfaktors in Brückenschaltung nach Patent 5`50 777, dadurch gekennzeichnet, daB das in der Brückendiagonale liegende Galvanometer auf den Eigenverbrauch in Watt geeicht ist.PATENT CLAIM Measuring device for determining alternating current powers variable frequency and variable power factor in bridge circuit according to patent 5`50 777, characterized in that the one lying in the bridge diagonal Galvanometer is calibrated for its own consumption in watts.
DEP66069D 1932-09-24 1932-09-24 Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit Expired DE579413C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP66069D DE579413C (en) 1932-09-24 1932-09-24 Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP66069D DE579413C (en) 1932-09-24 1932-09-24 Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Publications (1)

Publication Number Publication Date
DE579413C true DE579413C (en) 1933-06-26

Family

ID=7390725

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP66069D Expired DE579413C (en) 1932-09-24 1932-09-24 Measuring device for the determination of alternating current powers of variable frequency and variable power factor in bridge circuit

Country Status (1)

Country Link
DE (1) DE579413C (en)

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