5.4
EMC-compatible installation of control lines
Pay attention to suf
fi
cient distance from powerlines and motor wires to prevent interferences. The
control cable may not be longer than 30 m. Screened control cables must be used when the cable
length is longer than 20 m. When using a shielded cable connect the shielding to one side only, i.e.
only to the signal source with the protective earth (keep cable short and with as little inductance as
possible!).
5.5
Mains connection
5.5.1
Line voltage
Mains connection: PE, L1, and N. Here, it must be strictly observed that the mains voltage lies within
the allowable tolerance speci
fi
cations (see technical data).
Alternatively a supply of DC voltage is possible (see Technical data).
The polarities on
“
L1
”
and
“
N
”
are irrelevant.
Danger due to electric current
•
Between the mains connection of the device and the protective earth
“
PE
”
is in no case a higher
voltage permissible than the indicated line voltage of the device!
•
To activate the on current limitation, you must
wait
at least
90 seconds
after switching off the line
voltage before switching back on!
5.5.2
Required quality attributes for the mains voltage
Danger due to electric current
The mains voltage must comply with the EN 50160 quality characteristics and the de
fi
ned standard
voltages in IEC 60038!
5.5.3
Line protection fuse
The mains connection must be fused depending on the used cable, the type of routing, the operating
conditions and according to the standards applicable on site. The speci
fi
cation for the maximum
admissible line fuse of the device must be observed (see technical data).
Possible components for the line protection (recommendation):
•
Safety fuses of operating class
“
gG
”
(whole range fuse cartridges for general applications according
to EN 60269-1).
•
Line protection switch with characteristic
“
C
”
(according to EN 60898-1).
•
Motor protection switch with overload and short-circuit trigger (according to EN 60947-4-1). Setting
overcurrent trigger to maximum permissible current of the line.
5.5.4
Operating in IT-System
Danger due to electric current
•
In the IT-System the neutral point of voltage supply is not grounded; in the case of a short-circuit
between a phase (e.g.
“
L1
”
) and protective earth
“
PE
”
becomes the protective earth potential =
phase.
•
Between the mains connection of the device and the protective earth
“
PE
”
is in no case a higher
voltage permissible than the indicated line voltage of the device!
1 ~ types can be used in IT-System in standard version. These may only be used in 3 ~ IT-Systems if
no higher voltage to the
“
PE
”
can occur than the speci
fi
ed mains voltage of the device even in case of
a fault to earth of a mains phase which is not used by the device (of none of the two power supplies).
In order to ensure a trouble free operation in IT-System the
“
GND
”
potential of the control ports have
to be connected with the protective earth potential.
As a consequence of these connection must be considered for the control ports (exception
fl
oating
relay contacts):
1. Connection only with wires, suitable for mains voltage and surrounding area.
2. Connection with suitable isolated ampli
fi
ers only.
Assembly instructions
ECblue
Electrical installation
L-BAL-F055D-GB 1634 Index 002
Part.-No.
18/51
