Overheating protection, also known as thermal cut-off relay, temperature protection, the main role is to protect the magnetron. Since they use a microwave oven as shown in thermal sensor chip recovery overheating protection in Figure 7. It is mounted in the housing of the magnetronhKrservice manual download site
When on the end face of the cover in direct contact with the magnetron, magnetron, the temperature change by the end face of the cover to the heat conduction sensor chip. Within the normal temperature range, the protector of the dynamic and static contact contact, conduction state. When there is a cooling fan stops and other anomalies caused by the rapid increase in the magnetron and reach the required temperature (Protection) values​​, thermal sensor chip thermal deformation, so that plunger movement, the spring pressure, so moving contacts will from the stationary contact, then the circuit is cut off, the magnetron is stopped, the temperature began to decrease slowly. When the temperature drops to a certain value magnetron thermal sensor chip and action, restore the prototype, so dynamic and static contact contact, the circuit has been switched on, the magnetron to work again, this is the self-recovery function.hKrservice manual download site