NORD Drivesystems BU0240 - Manual (Page 7)

1 General
BU 0240 GB 7
1.2 Safety and installation information
NORDAC SK 200E 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. 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 100μH 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 a release 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 .
• Normal FI-circuit breakers are not suitable as the sole protection for three-phase
frequency inverters if the local regulations do not permit a possible DC proportion in the
fault current. According to EN 50178 / VDE 0160, the FI circuit breaker must be an all-
current sensitive FI circuit breaker (type B).
• In normal use, NORDAC SK 200E frequency inverters are maintenance free. The
cooling surfaces must be regularly cleaned with compressed air if the ambient air is
dusty.
CAUTION
The heat sink and all other metal components can heat up to temperatures above 70°C.
When mounting, sufficient distance from neighbouring components must be maintained.
When working on the components, allow sufficient cooling time beforehand
Protection against accidental contact may need to be provided.
ATTENTION
DANGER TO LIFE!
The power unit can continue to carry voltages for up to 5 minutes after being switched off at
the mains. Inverter terminals, motor cables and motor terminals may carry voltage!
Touching open or free terminals, cables and equipment components can lead to severe injury
or death!
Work may only be carried out by qualified specialist electricians and with the electrical supply
to the equipment disconnected!