The disclosure relates to an electromagnetic relay module, comprising a first circuit branch comprising a first capacitor and a first relay connected in series with the first capacitor, a second circuit branch comprising a second capacitor and a second relay connected in series with the second capacitor, a switching element which is arranged between the first circuit branch and the second circuit branch and comprises a first switching state and a second switching state. In the first switching state of the switching element the first circuit branch and the second circuit branch are arranged in a parallel connection. In the second switching state of the switching element the first relay and the second relay are arranged in a series connection. The switching element is configured to change from the first switching state to the second switching state in the switch-on process of the relay module

A method for controlling switchgear includes the implementation of a limitation of the intensity value of the power supply current of a coil of an actuator, including acquisition of a power supply current limit value; generation of a reference value representative of the power supply current limit value; acquisition of a signal representative of the intensity of the power supply current circulating through the coil; comparison of the reference signal with the signal representative of the intensity of the power supply current; inhibition of the current power supply of the coil, as long as the intensity of the power supply current has a value greater than or equal to the reference value, the current power supply of the coil being re-established when the intensity of the power supply current returns below the reference value.

A method for controlling switchgear includes the implementation of a limitation of the intensity value of the power supply current of a coil of an actuator, including acquisition of a power supply current limit value; generation of a reference value representative of the power supply current limit value; acquisition of a signal representative of the intensity of the power supply current circulating through the coil; comparison of the reference signal with the signal representative of the intensity of the power supply current; inhibition of the current power supply of the coil, as long as the intensity of the power supply current has a value greater than or equal to the reference value, the current power supply of the coil being re-established when the intensity of the power supply current returns below the reference value.

Provided are embodiments for operating an autonomous mode change circuit for solenoid drivers. The embodiments include initiating an operation of a solenoid, and receiving a command to control the operation of the solenoid. The embodiments also include controlling, by a drive circuit, a switch coupled to the solenoid based at least in part on the command, and detecting at least one of a current or voltage of the solenoid, and subsequently controlling the operation of the solenoid based at least in part on the detection.

A device includes: a controller configured to output a contactor control signal for controlling an operation of a contactor; a system basis unit configured to monitor a state of the controller and to output a safety detection signal; an operation maintaining unit including a first level shifter configured to shift a voltage level of the safety detection signal, a second level shifter configured to shift a voltage level of the contactor control signal, a retention output unit configured to compare the voltage level of the first level shifter with the voltage level of the second level shifter and to output a retention output signal, and a timer output unit configured to output a timer output signal to output the retention output signal for a preset time; and a contactor driver configured to output a contactor driving signal based on the contactor control signal and the retention output signal.

An air conditioner includes an outdoor unit, a relay circuit which includes a contact and a relay coil, and a control unit which causes a first voltage equal to or higher than an operating voltage or a second voltage lower than the operating voltage and equal to or higher than a retention voltage to be applied to the relay coil. One end portion of the contact is connected to an alternating-current power supply and the other end portion of the contact is connected to the outdoor unit. One end portion of the relay coil is connected to a power supply for driving the relay circuit. The control unit causes a second voltage to be applied to the relay coil after the contact is turned ON, and causes the first voltage to be applied to the relay coil at a predetermined constant period.

An air conditioner includes an outdoor unit, a relay circuit which includes a contact and a relay coil, and a control unit which causes a first voltage equal to or higher than an operating voltage or a second voltage lower than the operating voltage and equal to or higher than a retention voltage to be applied to the relay coil. One end portion of the contact is connected to an alternating-current power supply and the other end portion of the contact is connected to the outdoor unit. One end portion of the relay coil is connected to a power supply for driving the relay circuit. The control unit causes a second voltage to be applied to the relay coil after the contact is turned ON, and causes the first voltage to be applied to the relay coil at a predetermined constant period.

A control device for an electromagnetic drive of a switchgear includes: a power supply unit for generating a pick-up and a holding DC voltage for the electromagnetic drive of the switchgear, depending on a control signal; and a control unit for generating the control signal, which unit is designed to generate a second control signal for actuating a switch for joining or disconnecting the drive to or from the pick-up or holding DC voltage generated by the power supply unit. The power supply unit includes a switched-mode power supply unit that is designed for an input voltage range matched to an operating voltage range of the switchgear, the input voltage range being approximately 48 volts to approximately 240 volts, approximately 110 volts to approximately 240 volts, or approximately 24 volts to approximately 240 volts. The control unit is designed to generate the second control signal depending on a measuring voltage.

A method of dispensing fluid from an apparatus includes determining a phase offset to separate actuation of a plurality of valve sub-sets into phases and determining a sub-phase offset to separate actuation of valves within each of the plurality of valve sub-sets. The method also includes sequentially actuating valves in a first sub-set based on the sub-phase offset, and sequentially actuating valves in a second sub-set based on the phase offset and the sub-phase offset such that (i) at least one valve in the second sub-set is actuated out of phase from a preceding valve in the first sub-set by the phase offset; and (ii) the at least one valve in the second sub-set is actuated out of phase from a preceding valve in the second sub-set by the sub-phase offset.

Provided are embodiments for a circuit for a relay drive with a power supply economizer. The circuit includes a relay having a relay coil and a relay contact. The circuit also includes a power source to generate power for a coil drive voltage to operate the relay, and a controller configured to provide a command signal to operate the circuit in a plurality of modes. The circuit includes a first gate drive coupled to a first switch, wherein the first switch connects the relay coil to the circuit, and a second gate drive coupled to a second switch, wherein the second switch changes an effective resistance of a resistor network of the circuit to modify the coil drive voltage. Also provided are embodiments for a method for operating a circuit including relay drive with a power supply economizer.