NORD Drivesystems BU0500 - Manual (Page 15)

1 General
BU 0500 GB-1013 15
WARNING Danger of electric shock
The voltage supply of the frequency inverter may directly or indirectly put it into operation, or touching electrically
conducting components may then cause an electric shock with possible fatal consequences.
Therefore, all poles of the voltage supply must be disconnected. For devices with a 3-phase supply,
L1 / L2 / L3 must be disconnected. For devices with a single phase supply, L1 / N must be disconnected. For
devices with a DC supply, –DC / +B must be disconnected. Also, the motor cables U / V / W must be
disconnected.
WARNING Danger of electric shock
In case of a fault, insufficient earthing may cause an electric shock with possibly fatal consequences if the device
is touched.
Because of this, the frequency inverter is only intended for permanent connection and may not be operated
without effective earthing connections which comply with local regulations for large leakage currents (> 3.5mA).
EN 50178 / VDE 0160 stipulates the installation of a second earthing conductor or an earthing conductor with a
cross-section of at least 10mm
2
.
WARNING Danger of injury if motor starts
With certain setting conditions, the frequency inverter or the motor which is connected to it may start automatically
when the mains are switched on. The machinery which it drives (press / chain hoist / roller / fan etc.) may then
make an unexpected movement. This may cause various injuries, including to third parties.
Before switching on the mains, secure the danger area by warning and removing all persons from the danger
area.
CAUTION Danger of burns
The heat sink and all other metal components can heat up to temperatures above 70°C.
Touching such components may cause local burns to the affected parts of the body (hands, fingers, etc.).
To prevent such injuries, allow sufficient time for cooling down before starting work - the surface temperature
should be checked with suitable measuring equipment. In addition, keep sufficient distance from adjacent
components during installation, or install protection against contact.
NOTICE Damage to the frequency inverter
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.
Failure to comply with this may cause damage to the frequency inverter due to impermissible currents in the
components.
NOTICE EMC - Interference
The frequency inverter is a product which is intended for use in an industrial environment and is subject to sales
restrictions according to IEC 61800-3. Use in a residential environment may require additional EMC measures.
For example, electromagnetic interference can be reduced by the use of an optional mains filter.