Where is the automatic tap changer installed on the TCUL transformer?

The automatic tap changer on a TCUL (Transformers with Closed-Loop Unbalanced Loads) transformer is installed on the low side. This is significant because the low side is where voltage regulation primarily occurs for downstream loads. The tap changer adjusts the transformer’s output voltage to maintain a constant voltage despite variations in load or input voltage. By being on the low side, it allows for effective stabilization and adjustment in response to changes in demand, ensuring that the connected devices receive consistent and optimal voltage levels.

Understanding the function and placement of the automatic tap changer is critical in maintaining transformer efficiency and protecting connected electrical systems from voltage fluctuations.