A COMPENSATION DEVICE SUITABLE FOR COMPENSATING A CAPACITIVE LEAKAGE CURRENT OF A CIRCUIT OF A SINGLE-PHASE ELECTRICAL SYSTEM

摘要

A compensation device suitable for compensating a capacitive leakage current of a circuit of a single-phase electrical system. The circuit (200) comprises a phase conductor (1) and a neutral conductor (2) connected, respectively, to a first conductor (3) and to a second conductor (4) of a single-phase electrical line (6), the second conductor (4) of the single-phase electrical line (6) being connected to earth. The circuit (200) also comprises one or more loads (9) which can be energized with alternating current from the single-phase electrical line (6) via the phase and neutral conductors (1, 2), the phase and neutral conductors (1, 2) and the loads (9) generating a capacitive leakage current (I_CD) towards earth. The compensation device (100) comprises a compensation circuit (12) provided with a first and a second terminal (13, 14). The compensation circuit (12) is arranged to be connected to the neutral conductor (2) via the first terminal (13) and to an earthing system 10 via the second terminal (14). The compensation circuit (12) is configured to generate a compensation current (I_C) in such a way that it flows alternately from the neutral conductor (2) to earth and vice versa through the earthing system (10) when the first and second terminals (13,14) are connected, respectively, to the neutral conductor (2) and to the earthing system (10), the compensation current (I_C) having direction which is opposite that of the capacitive leakage current (I_CD) and intensity such that the sum of the compensation current (I_C) and the capacitive leakage current (I_CD) has a smaller value than the value of the capacitive leakage current (I_CD).