ABB ESP M1R Installation Instructions Manual page 19

3.8 Size of connecting leads
The connecting leads between the terminals of the ESP
unit and the power supply, should be 10 mm
stranded conductor (copper). If required, the terminals
on the ESP unit will accept connecting leads of up to 25
mm .
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3.9 Length of connecting leads
The connecting leads should be kept as short as possible
and ideally should not exceed 25 cm (10 inches) from the
busbars to the unit's terminals. ESP units can be
mounted upside down or on their side if this facilitates
shorter connecting leads.
WARNING: The longer the connecting leads (between the
mains cable or busbars and the terminals of the ESP unit)
the greater the additive voltage let-through by the
installed protector.
If the resultant let-through voltage is higher than the
susceptibility level of the equipment to be protected,
damage will result.
ESP protectors with remote display units (M1R variants)
allow the protector to be mounted with short connecting
leads whilst allowing the display to be positioned
independently (eg conveniently on the front of the panel).
Installation instructions for mains wire-in protectors | 3/12
multi
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