Circuit breaking apparatus

A circuit breaking apparatus comprising:

• an apparatus body;
• first and second terminals provided in the apparatus body, respectively;
• a movable plug including a conductive portion and movable with respect to the apparatus body between a circuit opened position in which the movable plug does not electrically connect the first terminal to the second terminal and a circuit closed position in which the movable plug electrically connects the first terminal to the second terminal,
• a guide groove provided at one of the apparatus body and the movable plug;
• and
• a projection insertable into the guide groove and provided at the other of the apparatus body and the movable plug,
• wherein the movable plug is inserted into the apparatus body only when the projection is inserted into the guide groove.

A circuit breaking apparatus comprising:

• an apparatus body;
• a load side terminal connected to a load portion and provided in the apparatus body;
• a ground side terminal which is connected to the ground, provided in the apparatus body, and movable between a contact position in which the ground side terminal is in contact with the load side terminal and a separated position in which the ground side terminal is separated from the load side terminal;
• a power source side terminal connected to a power source portion and provided in the apparatus body;
• a movable plug including a conductive portion and movable with respect to the apparatus body between a circuit opened position in which the conductive portion is not in contact with the power source side terminal and a circuit closed position in which the conductive portion is in contact with the load side terminal and the power source side terminal;
• and
• an urging member for urging the ground side terminal to the contact position,
• wherein the ground side terminal is in the contact position when the movable plug is in the circuit opened position, and
• wherein the ground side terminal is moved to the separated position against urge force of the urging member in when the movable plug is moved from the circuit opened position to the circuit closed position.

A circuit breaking apparatus comprising:

• an apparatus body;
• a load side terminal connected to a load portion and provided in the apparatus body;
• a power source side terminal connected to a power source portion and provided in the apparatus body;
• a sacrifice electrode which is connected to the power source side terminal, provided in the apparatus body and interposed between the load side terminal and the power source side terminal;
• a movable plug including a conductive portion and movable with respect to the apparatus body between a circuit opened position in which the movable plug does not electrically connect the load side terminal with the power source side terminal and a circuit closed position in which the movable plug electrically connects the load side terminal with the power source side terminal;
• and
• insulative caps provided at the load side terminal and the power source side terminal, respectively,
• wherein when the movable plug is moved from the circuit opened position to the circuit closed position, the conductive portion is brought into contact with the load side terminal, the sacrifice electrode and the power source side terminal in order.