To provide a distribution board with an earthquake-sensing breaker which supplies power to lighting fixtures, etc., having less probability of causing consequential accidents arising from electricity as long as power is fed to the distribution board and prevents secondary troubles which may arise from a power failure (darkness) especially in the night, when the main breaker of the distribution board is caused to operate by the occurrence of a great earthquake causes.
In a distribution board with an earthquake-sensing breaker, a relay unit 4 made up of relays having an a-contact arrangement is incorporated inside the distribution board and a relay coil part is connected to the negative side of a main breaker 1 incorporated in the same distribution board. In addition to the circuit above, a circuit is provided which connects a load device to the power supply side terminals of the main breaker 1 and a contact of the relay is connected to a portion of one of two electric wires of this circuit.
HIRAYABU YUJI
TSUBAKI MAKOTO
