In ELCB, there’s rated voltage capable to run ELCB.
For example, the products read in 460/220V can be operated up to 460V. likewise the
products read in 220/110V
can be operated up to 220V.
This is applicable whether it is single or three phase.
If three phase ELCB is applied to single phase, only R,T phase should be connected
among R,S,T phase in ELCB.
single ELCB doesn’t allow to be used on three phase power.