Re: Transformer output current.
A thermal fuse is intended to detect overtemperature and not overcurrent.
To do this it must be in close thermal contact with the transformer winding. Bypassing a thermal fuse and fitting another one externally is therefore unwise.
Arguably acceptable for a brief test or investigation, but not for long term unattended operation.
Thermal fuses in small transformers are often intended NOT to save the transformer, but to operate when the transformer is already defective and prevent a fire.
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