It's quite simple - if an RCD is suitable for use on 110 V systems, the manufacturer will declare that voltage range ... if not, it won't be declared, as the RCD functionality to BS EN 61008 or BS EN 61009 is not assured.
It's not simply a case of whether the test button will or won't work.
To fit a device in an electrical system other than one it is rated for, in a workplace, could lead to a breach of Regulation 5 of the Electricity at Work Regulations. Art. 85 of the Memorandum of Guidance on EAWR says:
85 Electrical equipment should be used within the manufacturer’s rating (continuous, intermittent or fault rating as appropriate) and in accordance with any instructions supplied with the equipment.
So, check the manufacturer says it's OK for 110 V AC systems ...
So is it just the voltage that will effect only the testing of the rcd Surely it should still operate? I know the regs say it should be able to functional test but in the case of this I believe it to be an addition as the circuit is 55-0-55?
I have a 200v 3ph delta 300Hz system and we wanted to update the wiring and add RCD protection
Schneider designed the distribution boards for me, and gave me a spec at which it would operate (about 20ma iirc) but also stated that the test buttons would not work
