What is a common method for protecting distribution transformers?

The most effective method for protecting distribution transformers involves installing overcurrent and temperature protection devices. These devices are essential because they monitor the current flowing through the transformer and the temperature of the transformer windings.

Overcurrent protection helps to prevent damage caused by excessive current, which can lead to overheating and ultimately transformer failure. Temperature protection devices, such as temperature sensors or thermal relays, ensure that the transformer operates within safe temperature limits, triggering alarms or disconnecting the transformer if temperatures exceed the specified thresholds.

Together, these protective measures help maintain the integrity and longevity of the transformer, minimizing the risk of failure and, therefore, ensuring a reliable power supply. Other options, like using only fuses or unprotected wiring, do not provide the comprehensive protection needed for distribution transformers, as they lack the capacity to respond effectively to both overload and overheating conditions. While employing multiple transformers in parallel can be beneficial for load management, it does not directly address the need for protective mechanisms specific to each transformer's operation.