2 Assembly and installation
BU 0540 EN-1516
19
NOTICE
Operation in IT networks
The use of this frequency inverter on an
IT network
is possible after modification of the integrated mains filter.
It is urgently recommended that the frequency inverter is only operated on a IT network if a braking resistor is
connected. If an earthing fault occurs in the IT network, this measure prevents an impermissible charging of the
link circuit capacitor and the associated destruction of the frequency inverter.
For operation with an insulation monitor, the insulation resistance of the frequency inverter must be taken into
account.
Pos: 73 /Anl eitungen/Elektroni k/FU und Starter/2. M ontage und Install ati on/El ektrischer Anschluss/SK 500E/2.10.4 Elektrischer Anschl uss Leistungsteil -T eil 2 - Motor kabel ( X2) [BU 0500] @ 1\mod_1331195941727_388.docx @ 17638 @ 5 @ 1
Motor cable (X2 - U, V, W, PE)
The motor cable may have a
total length of 100m
if this is a standard cable (take EMC into
consideration). If a screened motor cable is used, or if the cable is laid in a metal conduit which is well
earthed, the
total length should not exceed 30m
.
For greater lengths of cable, an additional output choke (accessory) must be used.
For multiple motor operation the total motor cable length consists of the sum of the individual cable
lengths.
NOTICE
Output switching
The motor cable must not be switched as long as the inverter is pulsing (The inverter must be in "Standby" or
"Starting disabled" status).
Otherwise the inverter nay be damaged.
Pos: 74 /Anl eitungen/Elektroni k/FU und Starter/2. M ontage und Install ati on/El ektrischer Anschluss/SK 500E/2.10.4 Elektrischer Anschl uss Leistungsteil -T eil 3 - Br emswiderstand ( X2) [BU 0500] @ 1\mod_1331195973501_388.docx @ 17662 @ 5 @ 1
Breake resistor (X2 - +B, -B)
The terB/ -B are intended for the connection of a suitable braking resistor. A short screened
connection should be selected. For the installation of a braking resistor, the large amount of heat
which is generated due to its operation (> 70°C) must be taken into account.
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2.2.4 Electrical connection of the control unit
The control connections are located under the front cover (above size 8 under the two front covers) of
the frequency inverter. The configuration differs according to the size. Up to size 7, the individual
control terminals (X3, X8, X13) are in staggered positions (please see chapter 2.2 "Electrical
Connection data:
Frequency inverter
All
Size 1 … 4 Size 5 … 7
Above
size 8:
Terminal block
Typically
X3
X3, X8,
X12, X13
X3.1/2,
X15
Rigid cable Ø
[mm²] 0.14 … 1.5 0.14 … 2.5
0.2 … 6
0.2 … 2.5
Flexible cable Ø
[mm²] 0.14 … 1.5 0.14 … 1.5
0.2 … 4
0.2 … 2.5
AWG standard
26-16
26-14
24-10
24-12
Starting torque
[Nm]
Clamping
0.5 … 0.6
0.5 … 0.6
Clamping
[lb-in]
4.42 … 5.31
4.42 … 5.31
