ABB ESP M1R Installation Instructions Manual page 12

Figure 5:
ESP unit mounted within a
distribution board connected to
the incoming supply on the load
side (ie downstream) of the
isolator. (Note the additional earth
bond to the metalwork of the
distribution board. This technique
is explained in 3.9(iii).)
Figures 3 & 4 show connection diagrams for single phase
and three phase star power supplies.
Connecting leads to the unit need to be kept short in
order to minimise additive inductive voltages.
3.4 Connection to phase, neutral and earth
Connections are made to each supply conductor
including earth. Terminals marked L, N,
units) or L1, L2, L3, N,
connected to phase/live, neutral and earth respectively.
3/5 | Installation instructions for mains wire-in protectors
Load side Load side Load side Load side Load side Load side
Supply side Supply side Supply side Supply side Supply side Supply side
(three phase units) must be
To To To To To To
outgoing outgoing outgoing outgoing outgoing outgoing
ways ways ways ways ways ways
Isolator Isolator Isolator Isolator Isolator Isolator
L L L L L L L L L L L L L L L L L L N N N N N N
1 1 1 1 1 1 2 2 2 2 2 2 3 3 3 3 3 3
(single phase