The temperature limits of dry-type transformers primarily depend on the thermal resistance class of their insulation materials. Below are the temperature limits corresponding to different insulation classes for dry-type transformers:

　　In addition to the insulation class, the operating temperature of dry-type transformers is also subject to industry standards or manufacturer recommendations. Generally, under normal operating conditions, the temperature of a dry-type transformer should not exceed the maximum allowable temperature corresponding to its insulation class.

　　To ensure the safe operation and prolong the service life of dry-type transformers, they are typically equipped with temperature monitoring and protection devices. These devices can monitor the transformer's temperature in real-time and take protective measures, such as issuing alarms or automatically disconnecting the power, when the temperature exceeds the safe range.

　　In summary, the temperature limit of a dry-type transformer is a crucial safety parameter that must be strictly adhered to. When selecting and using a dry-type transformer, an appropriate insulation class should be chosen based on the specific application scenario and requirements, and the transformer's operating temperature should be maintained within the safe range.