Relay with temperature sensor, has control and evaluation unit that combines electromagnet system coil electrical resistance signal(s) with associated temperature value

摘要

The relay has an electromagnet system with at least one coil (1), at least one switch contact (2) operated by the electromagnet system, a control and evaluation unit (6) for driving the electromagnet system and coupled to it via a stimulation circuit (3) and at least one measurement device (4) for detecting the electrical resistance of the coil(s) and providing at least one measurement signal for delivery to the control and evaluation unit for combination with an associated temperature value.