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 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 measurement unit in connection with said 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 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 (7) and a measurement unit (4, 5, 6) in connection with each phase conductor (1, 2, 3) 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 (7), 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 (7).
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Citations
19 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 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 measurement unit in connection with said 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 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)
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8. An apparatus for measuring quantities of a multi-phase electric line, the apparatus comprising:
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a control unit; and
a 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 phase conductor in connection with which it is located and to transfer the measured quantity value to the measurement 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 and first phase quantities of other phase conductors and to transfer the measured phase angle values to the control unit. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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- 15. A measurement unit for measuring quantities of a multi-phase electric line, which measurement unit is located in connection with one phase conductor of the electric line, the measurement unit being arranged to measure a first phase quantity of the phase conductor in connection with which it is located, and to measure phase angles between the first phase quantity of the phase conductor in connection with which it is located and first phase quantities of other phase conductors.
Specification