5.2.3
Harmonics current for devices
≤
16 A
According to EN 61000-3-2 these devices are to be classi
fi
ed as
“
professional
”
devices.
Connection to a low voltage supply (public networks) is allowed insofar as this has been clari
fi
ed with
the respective energy supply company responsible.
Note: up to a maximum current of approx. 4 A, the limits are adhered to with no restrictions.
Exception for Germany: An energy provider follows the technical connection conditions of the
TAB2007, in which case the use of phase angle controlled devices up to a rating of 3.4 kVA per phase
is allowed.
5.2.4
Harmonics current and line impedance for devices > 16 A and
≤
75 A
Extract from EN 61000-3-12, valid for equipments with rated current > 16 A and
≤
75 A, connected to
public low-voltage systems.
This equipment complies with IEC 61000-3-12 provided that the short-circuit power S
SC
is greater than or equal
to R
SCE
x S
equ
at the interface point between the user's supply and the public system.
It is the responsibility of the installer or user of the equipment to ensure, by consultation with the distribution
network operator if necessary, that the equipment is connected only to a supply with a short-circuit power S
SC
greater than or equal to R
SCE
x S
equ
.
S
SC
Short-circuit power from line at the interface point between the user's supply and the public system
S
equ
Rated - apparent power for three phase devices: S
equ
=
√
3 x U
I
x I
equ
(U
I
= phase to phase voltage se Technical data
“
Line voltage
”
)
(I
equ
= rated current of the device se Technical data
“
Rated current input
”
)
R
SCE
Short-circuit ratio
For this devices: R
SCE
≥
120
5.3
Mains connection
5.3.1
Line voltage
Power from the mains is connected to terminals: PE, L1, L2, L3 and N. Here, it must be strictly
observed that the mains voltage lies within the allowable tolerance speci
fi
cations (
Technical data
and nameplate af
fi
xed to the side).
The neutral conductor connection
“
N
”
is only for the leakage currents`s reduction. It is of no
signi
fi
cance for the fuction of the device. The connection is not applicable for power supply networks
without a neutral conductor.
5.3.2
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!
5.3.3
Operating in IT-System
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 =
“
L1
”
.
In order to ensure a trouble free operation in this case:
1. the
“
GND
”
potential of the control ports have to be connected with the protective grounding
potential.
2. the
“
N
”
lead must not be connected.
As consequence of the connection between
“
GND
”
potential of the control ports with protec-
tive earth potential, the following must be considered (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.
Operating Instructions
Dcontrol
–
model series PKDM6..80
Electrical installation
L-BAL-E143-GB 1914 Index 009
Part.-No.
12/40
