DOUBLE-POLE VOLTAGE SWITCH Russian patent published in 2025 - IPC H03K17/08 H03K17/284 

FIELD: electronic equipment.

SUBSTANCE: invention is related to the field of electronic equipment and may be used for voltage switching at the load with its protection against current overload and leakage current protection from switched voltage to device housing. Voltages of the switched buses are compared with output voltage of the measuring amplifier. When detecting leakage currents, reference voltages of threshold control elements are signals generated from voltages of switched buses. When high currents are detected, the reference voltages of the threshold control elements is a signal generated from the output voltage of the measuring amplifier. At the same time double-pole voltage switch comprises serially connected bus of positive potential of input voltage, upper electronic switch, load unit, lower control input and bus of negative potential of input voltage. Control inputs of electronic switches are connected to outputs of threshold control elements of electronic switches. Inputs of threshold control elements of electronic switches are respectively connected to the switched power buses and the output of the measuring amplifier, the input signals of which are the voltage drop on a resistor connected in the circuit between the middle point of the voltage divider connected to the switched buses.

EFFECT: enlarging functional capabilities of voltage switchboard due to independent or simultaneous protection against current overload of switched power buses and protection against exceeding of specified "leakage current" to the housing from any of switched power buses.

1 cl, 3 dwg