Thermal behavior of automatic thermal-magnetic protection circuit-breakers. Experimental test
The paper reports laboratory tests to evaluate the thermal behavior of thermal-magnetic protection circuit-breakers. They are characterized by a rather variable intervention mode according to the environmental and operating thermal conditions. The scope is verify a relationship between the thermal image of the circuit-breaker and the phenomena that lead the actuator mechanism to tripping. The work shows a various types of temperature sensors and location, highlighting their performance, according to these measurement tests.