NORD Drivesystems BU0200 - Manual (Page 14)

1 General information
BU 0200 GB-4411 Subject to technical alterations 13
external SK TU4-IOE, external I/O extension
SK TU4-PBR, external Profibus module
SK TU4-CAO, external CANopen module
SK TU4-DEV, external DeviceNet module
SK TU4-ECT, external EtherCAT® module
SK TU4-24V-123-B, external 24V mains unit 1~ 230V
SK TU4-24V-140-B, external 24V mains unit 1~ 400V
SK TU4-POT-123-B, external 24V and potentiometer/switch module 1~ 230V
SK TU4-POT-140-B, external 24V and potentiometer/switch module 1~ 400V
SK TI4-TU-BUS or NET or MSW, connection unit TU4
SK TIE4-WMK-TU, wall-mounting kit TU4
SK TU4 MSW, external maintenance switch
NOTE: Details for the use of the relevant bus systems can be found in the applicable supplementary bus
manual.
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1.4 Safety and installation information
SK 2xxE frequency inverters are devices for use in industrial high voltage systems and are operated at
voltages that could lead to severe injuries or death if they are touched.

Installation and other work may only be carried out by qualified electricians and with the
device disconnected from mains. The operating instructions must always be available to
these persons and must be strictly observed.

Local regulations for the installation of electrical equipment and accident prevention
must be complied with.

The equipment continues to carry hazardous voltages for up to 5 minutes after being
switched off at the mains.

For single phase operation (115/230V) the mains impedance must be at least 100

H for
each conductor. If this is not the case, a mains choke must be installed.

For safe isolation from the mains, all poles of the supply cable to the frequency inverter
must be able to be disconnected.

Even during motor standstill (e.g. caused by an electronic block, blocked drive or output
terminal short circuit), the line connection terminals, motor terminals and braking resistor
terminals may still conduct hazardous voltages. A motor standstill is not identical to
electrical isolation from the mains.

Warning, with certain settings, the frequency inverter/motor can start up automatically
after the mains are switched on.

The frequency inverter is only intended for permanent connection and may not be
operated without effective earthing connections which comply with the local regulations
for large leakage currents
(> 3.5mA). VDE 0160 stipulates the installation of a second earthing conductor or an
earthing conductor cross-section of at least 10 mm
2
.

A universal leakage current-sensitive circuit breaker (type B) compliant with EN
50178/VDE 0160 must be used.

In normal use, SK 2xxE frequency inverters are maintenance free. The cooling surfaces
must be regularly cleaned with compressed air if the ambient air is dusty.

The frequency inverters are suitable for operation on TN or TT networks and with obser-
vation of the measures described in Section 2.7.5, they are also suitable for IT networks.