The present disclosure relates to the control of an operation of a monitor module of an electrical measurement system, where the monitor module has a plurality of operating states, including a) monitor at least a first measurement sensor of the utility meter to determine a first monitor result comprising an estimate of a transfer function of the first measurement sensor and a corresponding certainty value indicative of the accuracy of the estimate of the transfer function of the first measurement sensor, wherein the first measurement sensor is for measuring a first electrical property, and b) do not monitor any measurement sensor of the electrical measurement system.

The present disclosure relates to the control of an operation of a monitor module of an electrical measurement system, where the monitor module has a plurality of operating states, including a) monitor at least a first measurement sensor of the utility meter to determine a first monitor result comprising an estimate of a transfer function of the first measurement sensor and a corresponding certainty value indicative of the accuracy of the estimate of the transfer function of the first measurement sensor, wherein the first measurement sensor is for measuring a first electrical property, and b) do not monitor any measurement sensor of the electrical measurement system.

Method for detecting a fault in an electricity meter including a breaking unit, the fault producing an abnormal temperature increase in the meter, the detecting method comprising the steps of: measuring a magnitude of an electrical current flowing through the breaking unit; measuring an interior temperature in proximity to the breaking unit; and detecting the presence or absence of the fault on the basis of the measured magnitude and the measured interior temperature.

A phase group estimation device according to the present invention includes: a data acquirer that acquires data transmitted from a smart meter; a storage that stores equipment information indicating a correspondence between the smart meter and a pole-mounted transformer corresponding to the smart meter; and a phase group estimator that classifies processing sections into phase groups based on the equipment information and the data. Each of the processing sections is a section corresponding to a pole-mounted transformer, and each of the phase groups is powered by the same phase of a distribution line.

The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. The current measurement apparatus 100 also comprises a signal source 112 which is operative to apply a reference input signal to the measurement arrangement 110, 114 whereby an output signal from the measurement arrangement comprises a load output signal corresponding to the load drawn current signal and a reference output signal corresponding to the reference input signal. The current measurement apparatus 100 further comprises processing apparatus 116 which is operative to receive the output signal and to make a determination in dependence on the reference output signal and the load output signal, the determination being in respect of at least one of the load drawn current signal and electrical power consumed by the load.

The present invention relates to current measurement apparatus 100. The current measurement apparatus 100 comprises a measurement arrangement 110, 114 which is configured to be disposed in relation to a load 108 which draws a current signal, the measurement arrangement being operative when so disposed to measure the load drawn current signal. The current measurement apparatus 100 also comprises a signal source 112 which is operative to apply a reference input signal to the measurement arrangement 110, 114 whereby an output signal from the measurement arrangement comprises a load output signal corresponding to the load drawn current signal and a reference output signal corresponding to the reference input signal. The current measurement apparatus 100 further comprises processing apparatus 116 which is operative to receive the output signal and to make a determination in dependence on the reference output signal and the load output signal, the determination being in respect of at least one of the load drawn current signal and electrical power consumed by the load.

Position sensing and verification modules and a meter are provided. A module is configured to determine a position of one or more switch poles by measuring a current across the one or more switch poles. If a current is greater than or equal to a predetermined current threshold, the position is closed. If a current is less than the predetermined current threshold, the position is open. The module is configured to determine a line voltage with respect to a first reference value, determine a load voltage with respect to the first reference value, compare the line voltage to the load voltage to determine if the line voltage and the load voltage are within a predetermined threshold, and confirm the position of the one or more switch poles based on the comparison of the line voltage to the load voltage for the one or more line phases.

Position sensing and verification modules and a meter are provided. A module is configured to determine a position of one or more switch poles by measuring a current across the one or more switch poles. If a current is greater than or equal to a predetermined current threshold, the position is closed. If a current is less than the predetermined current threshold, the position is open. The module is configured to determine a line voltage with respect to a first reference value, determine a load voltage with respect to the first reference value, compare the line voltage to the load voltage to determine if the line voltage and the load voltage are within a predetermined threshold, and confirm the position of the one or more switch poles based on the comparison of the line voltage to the load voltage for the one or more line phases.

A method for monitoring a polyphase network includes the steps, repeated regularly, of: acquiring voltage measurements taken by voltage sensors of an item of electrical equipment, and producing current values of electrical parameters; accessing a reference table comprising a list of connection configurations each associated with a distinct combination of reference values of said electrical parameters, the list of connection configurations comprising configurations each corresponding to a combination of connection states for each phase (P1, P2, P3) and for the neutral (N); implementing an exploratory algorithm intended to explore the reference table to identify the current connection configuration.

A method for monitoring a polyphase network includes the steps, repeated regularly, of: acquiring voltage measurements taken by voltage sensors of an item of electrical equipment, and producing current values of electrical parameters; accessing a reference table comprising a list of connection configurations each associated with a distinct combination of reference values of said electrical parameters, the list of connection configurations comprising configurations each corresponding to a combination of connection states for each phase (P1, P2, P3) and for the neutral (N); implementing an exploratory algorithm intended to explore the reference table to identify the current connection configuration.