Abstract: The present invention relates to a power supply circuit (400) for a breaking circuit (100), the power supply circuit (400) comprising a first connecting point (CP1) arranged to be connected to an input (102) of the breaking circuit (100) and a second connecting point (CP2) arranged to be connected to an output (104) of the breaking circuit (100).

Abstract: The present invention relates to a power supply circuit (400) for a breaking circuit (100), the power supply circuit (400) comprising a first connecting point (CP1) arranged to be connected to an input (102) of the breaking circuit (100) and a second connecting point (CP2) arranged to be connected to an output (104) of the breaking circuit (100).

Abstract: The present invention relates to a circuit and an arrangement for breaking alternating current, the circuit comprising: an input arranged to receive an alternating current (AC); an output arranged to provide the alternating current (AC) to at least one electrical load; at least one controllable switch coupled between the input and the output; an impedance network (Z) coupled between the input and the output; and a transistor network (TN) comprising at least one transistor (TTN1; TTN2), the transistor network (TN) being arranged to control the at least one controllable switch, so as to control the breaking of the alternating current (AC) provided to the at least one electrical load, based on a value of at least one voltage (V1; V2) of at least one node of the impedance network (Z).

Abstract: The present invention relates to a circuit (100) for breaking alternating current, the circuit (100) comprising: an input (102) arranged to receive an alternating current (AC); an output (104) arranged to provide the alternating current (AC) to at least one electrical load (200n); at least one controllable switch (106; 108) coupled between the input (102) and the output (104); an impedance network (Z) coupled between the input (102) and the output (104); a controller (110) coupled to a reference ground (112) common to the controller (110) and the at least one controllable switch (106; 108), wherein the controller (110) is arranged to measure at least one measuring voltage (V1; V2) between a node of the impedance network (Z) and the reference ground (112) and to control the at least one controllable switch (106; 108), so as to control the breaking of the alternating current (AC) provided to the at least one electrical load (200n), based on the value of the measured at least one measuring voltage (V1; V2).

Abstract: The present invention relates to a circuit and an arrangement for breaking alternating current, the circuit comprising: an input arranged to receive an alternating current (AC); an output arranged to provide the alternating current (AC) to at least one electrical load; at least one controllable switch coupled between the input and the output; an impedance network (Z) coupled between the input and the output; and a transistor network (TN) comprising at least one transistor (TTN1; TTN2), the transistor network (TN) being arranged to control the at least one controllable switch, so as to control the breaking of the alternating current (AC) provided to the at least one electrical load, based on a value of at least one voltage (V1; V2) of at least one node of the impedance network (Z).

Abstract: The present invention relates to a circuit (100) for breaking alternating current, the circuit (100) comprising: an input (102) arranged to receive an alternating current (AC); an output (104) arranged to provide the alternating current (AC) to at least one electrical load (200n); at least one controllable switch (106; 108) coupled between the input (102) and the output (104); an impedance network (Z) coupled between the input (102) and the output (104); a controller (110) coupled to a reference ground (112) common to the controller (110) and the at least one controllable switch (106; 108), wherein the controller (110) is arranged to measure at least one measuring voltage (V1; V2) between a node of the impedance network (Z) and the reference ground (112) and to control the at least one controllable switch (106; 108), so as to control the breaking of the alternating current (AC) provided to the at least one electrical load (200n), based on the value of the measured at least one measuring voltage (V1; V2).

Abstract: An indoor climate control system in which a climate controlling equipment (1) has a control line (2) arranged to be connected to climate influenced impedance means (3), switching means (4) being arranged to disconnect the climate influenced impedance means from the control line under influence from a third output (5) of a control unit (6) and to instead connect substituting means (7) providing an impedance controlled by a first output (8) of the control unit, the control unit having polarity probing means (13) arranged to obtain an indication whether a connection of the substituting means to the control line results in a voltage with a positive or negative polarity, the connection of the substituting means being made in dependence on that indication and under influence of a second output (14) of the control unit.

Abstract: The invention relates to an electric system, comprising an electric equipment (1) having a control line (2) arranged to be connected to impedance means (3) as well as to substituting means (7). The substitution means provides an impedance controlled by a first output (8) of a control unit (6), the control unit having polarity probing means (13) arranged to obtain an indication whether a connection of the substituting means to the control line (2) results in a voltage with a positive or negative polarity. The connection of the substituting means (7) is made in dependence on that indication and under influence of a second output (14) of the control unit. According to the invention, the substituting means (7) comprise a series connection of two equivalent impedance networks (15, 16) provided each one with by-pass switching means (17, 18) for a plurality of impedance means (19, 20), each having series connected semiconductor switching means (21, 22) arranged in opposite directions.