Measurement of quantities of electric line
First Claim
1. A method for measuring quantities of a multi-phase electric line by means of a measurement arrangement comprising a separate measurement unit in connection with each phase conductor of the electric line and a control unit, the method comprising:
- measuring a first phase quantity of each phase conductor by means of the respective measurement unit in connection with the phase conductor;
transferring the measured quantity values to the control unit;
measuring, by means of the measurement unit in connection with one phase conductor, phase angles between a first phase quantity of said phase conductor in question and first phase quantities of other phase conductors; and
transferring the measured phase angle values to the control unit.
2 Assignments
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Accused Products
Abstract
A method and apparatus for measuring quantities of a multi-phase electric line, the apparatus comprising a control unit and a measurement unit in connection with each phase conductor of the electric line, wherein each measurement unit is arranged to measure a first phase quantity of the phase conductor in connection with which it is located and to transfer the measured quantity value to the control unit, the measurement unit located in connection with one phase conductor being further arranged to measure phase angles between the first phase quantity of said phase conductor and first phase quantities of other phase conductors and to transfer the measured phase angle values to the control unit.
10 Citations
20 Claims
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1. A method for measuring quantities of a multi-phase electric line by means of a measurement arrangement comprising a separate measurement unit in connection with each phase conductor of the electric line and a control unit, the method comprising:
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measuring a first phase quantity of each phase conductor by means of the respective measurement unit in connection with the phase conductor;
transferring the measured quantity values to the control unit;
measuring, by means of the measurement unit in connection with one phase conductor, phase angles between a first phase quantity of said phase conductor in question and first phase quantities of other phase conductors; and
transferring the measured phase angle values to the control unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for measuring quantities of a multi-phase electric line, the apparatus comprising:
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a control unit; and
a separate measurement unit in connection with each phase conductor of the electric line, each measurement unit being arranged to measure a first phase quantity of the respective phase conductor in connection with which it is located and to transfer the measured quantity value to the control unit, whereby the measurement unit located in connection with one phase conductor is further arranged to measure phase angles between the first phase quantity of said phase conductor in question and first phase quantities of other phase conductors and to transfer the measured phase angle values to the control unit. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A measuring system for measuring quantities of a multi-purpose electric line, comprising:
a separate measurement unit in connection with each phase conductor of the multi-phase electric line, each measurement unit being arranged to measure a first phase quantity of the respective phase conductor in connection with which it is located and to send the measured quantity value to a control unit, whereby the measurement unit located in connection with one phase conductor is further arranged to measure phase angles between the first phase quantity of said phase conductor in question and first phase quantities of other phase conductors and to send the measured phase angle values to the control unit. - View Dependent Claims (17, 18, 19, 20)
Specification