I'm creating a portable test socket for electrical appliances that comes equip with a RCBO, power meter and possibly emergency stop button. My test socket will operate at max 240V AC and 10A. The purpose of the RCBO is to protect myself when I'm working on or fixing electrical appliances.
When searching for RCBO breakers, they seem to have different rated residual current varying from 10mA to 300mA with the most common being 30mA. I understand that in a household application where multiple devices are connected there can be some leakage current where the higher rated residual current RCBOs are used. However, in my case where the RCBO is connected close to a single appliance, which value is most suitable for me? And also to take note the 10mA RCBOs are almost triple the price of the 30mA version from my local supplier.