Abstract: The present invention concerns an electrical actuator for a valve and a method of controlling a valve, using the electrical actuator. The electrical actuator includes an electronics chamber, including a control unit and a utility chamber, including at least one sensor unit. Each sensor unit includes a sensor. A penetration plate separates the electronics chamber and the utility chamber. Each sensor unit in the utility chamber is configured to wirelessly communicate a data signal, obtained by the sensor, to the control unit.

Abstract: A control system is disclosed for an electric actuator comprising an electric motor, an external supply of electric energy, an energy storage device and a first motor control module which controls the supply of energy to the motor in normal operation. A second motor control module controls the supply of energy to the motor in fail-safe mode. The first motor control module and the second motor control module are connected in parallel via a fail-safe switch which is arranged to override the control executed by the first motor control module to set the control system in fail-safe mode by activation of the second motor control module in either case of: the energy level in the energy storage device reaching, or falling below, a predetermined value, or failure in the external energy supply, or in response to an operator command. A method of controlling an electric actuator in a control system is also disclosed.

Abstract: A control system is disclosed for an electric actuator comprising an electric motor, an external supply of electric energy, an energy storage device and a first motor control module which controls the supply of energy to the motor in normal operation. A second motor control module controls the supply of energy to the motor in fail-safe mode. The first motor control module and the second motor control module are connected in parallel via a fail-safe switch which is arranged to override the control executed by the first motor control module to set the control system in fail-safe mode by activation of the second motor control module in either case of: the energy level in the energy storage device reaching, or falling below, a predetermined value, or failure in the external energy supply, or in response to an operator command. A method of controlling an electric actuator in a control system is also disclosed.