NORD Drivesystems BU0300 - Manual (Page 8)

NORDAC trio SK 300E Manual
8 Subject to technical alterations BU 0300 EN
1.4 Safety and installation information
NORDAC trio SK 300E frequency inverters are equipment 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 work may only be carried out by qualified specialist electricians and with the
electrical supply to the equipment disconnected. The manual must always be available for these
persons and must be complied with.
• Local regulations for installation of electrical systems and accident prevention regulations must be
complied with.
• The device may carry a dangerous voltage for up to 5 minutes after being switched off. The
equipment may only be opened or the cover removed 5 minutes after the equipment has been
disconnected from the power supply. All covers must be replaced before the mains voltage is
switched back on again.
• 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 synonymous with electrical separation from
the mains.
• Warning, under certain settings the frequency inverter can start 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 that comply with local regulations for large leak currents (> 3.5mA).
VDE 0160 requires the installation of a second earthing conductor or an earthing conductor cross-
section of at least 10mm
2 .
• Normal
FI-circuit breakers are not suitable as the sole protection in three-phase frequency
inverters when local regulations do not permit a possible DC proportion in the fault current.
The FI circuit breaker must be an all-mains sensitive FI circuit breaker (type B) as per EN 50178 /
VDE 0160.
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
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 still be live!
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!