The table below summarises the plug types, voltage and frequency of electrical current in both Tonga and Ireland.
|Plug Types||I||G, D, M, F|
|Frequency of electrical current||50Hz||50Hz|
Tonga uses Plug Type I.
In Ireland there's more than one socket type in use. You may require more than one adaptor.
The voltages found in Tonga (240V) and Ireland (230V) are not exactly the same, but the difference is tolerable, so you should not need a transformer.
The frequency found in Tonga and Ireland is exactly the same (50Hz). Timing devices and appliances that use motors will function as expected under this frequency.