A control device adapted to be connectable to, and configured to control, an electrical protection circuit including a switch assembly electrically connectable between a transformer neutral of a transformer and ground and being configured to operate in a first state and a second state based on the switch assembly, the second state providing a protection mode, the control device comprising: (a) a first measurement probe adapted to be electrically connectable to the transformer neutral and configured to measure an electrical property at the transformer neutral; the control device is characterised in that it comprises: (b) a second measurement probe adapted to be electrically connected to the electrical protection circuit and configured to measure an electrical property within the electrical protection circuit; and (c) a control module , including a processing device , the control module configured to execute instructions to: (i) monitor a measurement from the first measurement probe and generate a protection activation control signal based on the measurement from the first measurement probe exceeding a first predetermined threshold, the protection activation control signal being adapted for transmission to the switch assembly ; and (ii) monitor a measurement from the second measurement probe and generate a protection deactivation control signal based on the measurement from the second measurement probe satisfying a second predetermined threshold, the protection deactivation control signal being adapted for transmission to the switch assembly . (a) a first measurement probe adapted to be electrically connectable to the transformer neutral and configured to measure an electrical property at the transformer neutral; (b) a second measurement probe adapted to be electrically connected to the electrical protection circuit and configured to measure an electrical property within the electrical protection circuit; and (c) a control module , including a processing device , the control module configured to execute instructions to: (i) monitor a measurement from the first measurement probe and generate a protection activation control signal based on the measurement from the first measurement probe exceeding a first predetermined threshold, the protection activation control signal being adapted for transmission to the switch assembly ; and (ii) monitor a measurement from the second measurement probe and generate a protection deactivation control signal based on the measurement from the second measurement probe satisfying a second predetermined threshold, the protection deactivation control signal being adapted for transmission to the switch assembly . (i) monitor a measurement from the first measurement probe and generate a protection activation control signal based on the measurement from the first measurement probe exceeding a first predetermined threshold, the protection activation control signal being adapted for transmission to the switch assembly ; and (ii) monitor a measurement from the second measurement probe and generate a protection deactivation control signal based on the measurement from the second measurement probe satisfying a second predetermined threshold, the protection deactivation control signal being adapted for transmission to the switch assembly . <EOS>