| 摘要 |
A controller for confirming the contact status of a latch relay (30) embedded in an electric power meter according to the invention includes a microcomputer unit (10) that is electrically connected to the latch relay (30) for reading and providing the contact switching status information of the latch relay during a power failure, and read the contact switching status information stored during the power failure when a power recovers, and configured to output an opening control signal to the latch relay when the read contact switching status is an open state, and configured to output a closing control signal to the latch relay when the read contact switching status is a closed state; and a non-volatile memory (20) that stores the contact switching status information of the latch relay provided by the microcomputer unit or provides the contact switching status information of the latch relay to the microcomputer unit during a power failure. |
