Electric power switch with an electronic memory unit for parameters and conversion factors

摘要

An electrical power breaker includes an electronic protective device and an electronic memory. The memory is accommodated in the power breaker such that it is physically separated from said protective device, for operational data for the power breaker. Data security when using the additional electronic memory is increased by the electronic memory being connected to the protective device via a data bus, which can be used to transmit control signals for the purpose of activating or deactivating a write protection device of the electronic memory. The data bus is preferably an I²C bus, and the write protection device is controlled by an I/O module which is likewise controlled by the I²C bus.