NORD Drivesystems BU0530 - Manual (Page 9)

1 General
BU 0530 GB-3712 9
1 General
This manual BU 0530 ES describes the aspects that are directly related to the functional safety of the
equipment. All standard functions and parameters of the inverter are contained in the manual (BU 0500 GB).
1.1 Safety and installationinformation
SK 500E 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 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 by them.

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. The equipment may only be opened or the cover or control element removed 5
minutes after the equipment has been disconnected from the power supply. All covers must be
put back in place before the mains voltage is switched back on again.

For single phase operation (115/230 V) 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.

Parts of the control board, and especially the connector socket for the removable technology
units also carry hazardous voltages. The control terminals are mains voltage free.

Note: with certain settings, the frequency inverter can start up automatically after the mains are
switched on.

The circuit boards contain highly-sensitive MOS semiconductor components that are particularly
sensitive to static electricity. Avoid touching circuit tracks and components with the hand or
metallic objects. Only the terminal strip screws may be touched with insulated screwdrivers when
connecting the cables.

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
(> 3.5 mA). 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) according to EN 50178/VDE 0160
must be used.

SK 500E frequency inverters are maintenance free. The cooling surfaces must be regularly
cleaned with compressed air if the ambient air is dusty.

Installation of the frequency inverter in an IP54 switching cabinet is mandatory.

The clamp cover must be used!