Power Control Device

A power control device, comprising:

• an inverter that converts DC power into AC power;
• a control unit that performs control so that AC power converted by the inverter is supplied, in linkage with a power system, to a power load which is to be supplied with electric power from the power system via a breaker and a current detector;
• a disconnection relay for disconnecting the inverter from the power system;
• a take-in unit that takes in a contact signal indicative of an open/close state of the breaker;
• and
• a voltage detector that detects voltage at the power system side of a circuit to be disconnected by the disconnection relay,
• wherein the control unit includes:
• a storage unit in which whether the power control device is in a predetermined operating state or not is stored;
• a first determination unit that determines whether the voltage detector has detected voltage or not;
• a second determination unit that determines whether the current detector has detected current or not;
• and
• an acceptance unit that accepts an instruction to put the power control device into the predetermined operating state when an information that the power control device is not in the predetermined operating state is stored in the storage unit,
• wherein the control unit causes the disconnection relay to connect the inverter with the power load and stores, in the storage unit, an information that the power control device is in the predetermined operating state, in a case where the acceptance unit accepts the instruction, where the first determination unit and the second determination unit determine that voltage and current have not been detected and where a contact signal taken in by the take-in unit indicates an open state.