17
2021-06-09 / V1.0
Contactors CPP series – Installation and Maintenance Manual
Installation
7.2 Electrical connection
Electrical data and other technical
specifications
For the power consumption of the magnetic drive sys-
tem and electrical data of the auxiliary switches as well
as other technical specifications, refer to the respective
data sheets and to our
C45 catalogue
. The
C45 cata-
logue
is available under:
https://www.schaltbau.com/en/media-library/
Preparatory measures
X
The minimum clearances to live and earthed parts
are given in the corresponding data sheets or in
our
C45 catalogue
and must be adhered to. The
catalogue is available under:
https://www.schaltbau.com/en/media-library/
X
Switching of high voltage currents produces elec-
tric arcs and it is possible that plasma will escape
from the openings of the arcing chambers. There-
fore, it is extremely important to maintain the min-
imum clearances to live and earthed parts to avoid
flashovers. These minimum clearances have been
tested and specified in relation to the switching
capacity of the contactors.
X
Only for stand-alone versions: The earth/ground
connecting cable must be fitted with an appropri-
ate ring terminal (for M5 terminal screw).
X
Undersized conductor cross-sections for the earth
connection may produce a safety hazard.
X
The minimum conductor cross-sections for the
main terminal connection and the earth/ground
connection must be observed.
X
The connecting wires must be selected taking into
consideration the insulation class and the ambient
conditions.
X
The connecting wires of the main power circuit
must be fitted with appropriate ring terminals (for
M5 terminal screws).
X
To secure the main terminal screws so that they
do not come loose, appropriate screw locking ele-
ments must be provided. Schaltbau recommends
using Schnorr washers (or similar).
X
The main terminal screws must be tightened to a
torque of 4 - 5 Nm.
X
The connections for the auxiliary switches are
made with flat plugs. Consequently, the control
wires must be equipped with corresponding flat
receptacles 6.3 x 0.8 mm.
X
The maximum permissible conductor cross-
section of the auxiliary contact control wires is
1 mm2 / AWG 18 stranded wire.
X
For stand-alone versions a receptacle spring
clamp terminal block is provided for the coil con-
trol wires. The control wires for the coil connection
must be stripped accordingly (if necessary, fit with
appropriate wire end sleeves).
X
For the power consumption of the magnetic drive
system and the electrical data of the auxiliary
switches refer to our catalogues:
-
C45
(Catalogue CPP series devices)
-
D70
(Catalogue auxiliary switches S870)