DEVICE FOR MONITORING THE IMBALANCE OF THE ELECTRICAL POWER CALCULATED ON THE CONDUCTIVE LINES OF AN ALTERNATIVE ELECTRICAL SYSTEM OR A THREE-PHASE INTERNAL INSTALLATION

摘要

Device for monitoring the imbalance of the electrical power drawn on the conductive lines of a three-phase AC network or electrical installation. /P P The device is characterized in that it includes means 1 for measuring currents connected to lines P1, P2, P3, PN of the network to provide the digital values of the currents I1, I2, I3, IN flowing in these lines, means 11 for calculating the value of the ratio TD of the value of the current IN flowing in the neutral line PN, at the sum I1 + I2 + I3 of the values of the currents flowing in the phase lines P1, P2, P3, of the first means 13 for providing an indication when the value of said ratio TD exceeds a predetermined threshold known as imbalance , second means 16 for locating the phase line in which a current of value greater than each of the values of the currents flowing in the other phase lines circulates, the line identified being that which caused the d séquilibre. / P P Application to phase networks and facilities.