15
2021-06-09 / V1.0
Contactors CPP series – Installation and Maintenance Manual
Installation
Required minimum clearances
Switching of high voltage currents produces electric
arcs and it is possible that plasma will escape from the
openings of the arc chambers. Therefore, it is extreme-
ly important to maintain the minimum clearances to
ground/earth and the connecting contacts to avoid
flash-overs.
Minimum clearances for CPP contactors
A minimum clearance (A, B) to earth/ground potential
and insulating structure parts is required on all sides
and above the contactor. See
C45 catalogue
.
In addition, a distance (C) of 30 mm to the top is re-
quired to be able to remove the arc chamber in case of
maintenance work.
Fig. 6:
CPP stand alone versions: For minimum clearance to
earth/ground potential and insulating structure parts
see
C45 catalogue
.
Fig. 7:
CPP built-in versions: For minimum clearance to
earth/ground potential and insulating structure parts
see
C45 catalogue
.
ATTENTION
Make sure that there is sufficient space for routing
the wires for auxiliary switches and coil terminals
Otherwise, if the wires are routed too tightly, the
auxiliary switch connections and/or coil terminals
can break off or bend.
Ventilation requirements
X
Ensure sufficient ventilation in the installation
area, especially when switching heavy loads. This
allows the plasma to be dissipated more quickly
and reduces the risk of flash-over and corrosion.
Safety
X
Installation must be performed by qualified
trained personnel.
ATTENTION
When installing, ensure that no dirt can get into the
contactor as a result of surrounding building activi-
ties.
ATTENTION
Detent-edged rings and detent-edged washers have
a limited life time. After screws secured with detent-
edged rings or detent-edged washers have been
undone three times, the rings or washers must be
replaced by new ones.
X
Record the frequency of undoing of the screws
in the work log.
X
Replace detent-edged rings or detent-edged
washers with new ones after the screws have
been undone three times.
Tools required
-
Socket spanner set
-
Hexagon socket spanner set, hexagon socket bits
-
Set of Torx bits or Torx screwdrivers
-
Torque spanner
