Error-proof switching module

摘要

The module (1) has temperature sensors (31, 32) arranged on switching units (10, 20). One of the switching units is arranged in series with four switching-off devices (41-44), and another switching unit is arranged in series with the third and fourth switching-off devices. The first and third switching-off devices are made to react to the former sensor, and the second and fourth switching-off devices are made to react to another sensor. The four switching-off devices are arranged to switch off the switching units in an event of over temperature of the switching units.