ABB ESP M1R Installation Instructions Manual page 11

From
supply
3.3 Parallel connection
ESP mains wire-in protectors are connected in parallel
with the supply to be protected. See Figure 3. The
connecting leads do not carry the load current of the
supply, only the current associated with suppressing the
transient overvoltage.
Installation instructions for mains wire-in protectors | 3/4
Figure 4:
Parallel connection
for three phase star
(4 wire and earth)
supplies.
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