NORD Drivesystems BU0310 - Manual (Page 3)

BU 0310 GB 3
If the frequency inverter is connected to a motor and a speed reducer, also look for the
markings showing to which extent motor and reducer are explosion-proof!
Special designs and construction varieties may differ from the standard types regarding
certain technical features. If in doubt, by all means contact the manufacturer stating the
type designation and the NORD identification number and ask for the required
information.
Safety instructions
As the explosion hazard is definitely increased in areas where the air contains
inflammable dust, strict adherence to the general safety instructions and to the
instructions for system start-up is indispensable. The drive is supposed to meet the
requirements specified in Guide No. 6052101 for control process design. If ignited
by hot or spark-emitting objects, explosible dust concentrations may cause explosions
which may result in grave or even fatal personal injuries and in substantial material
damage.
It is absolutely necessary that each person responsible for the use and operation of
motors and frequency inverters in hazardous locations is well schooled in how to do
this safely in the appropriate fashion.
Always disconnect the supply voltage before you open the frequency inverter to
connect the electrical lines or to perform any other work on the device, and protect it
against circuit reclosure! Warning! Temperatures inside the frequency inverter and the
motor may occasionally exceed the maximum allowable surface temperature of the
housing. That is why the frequency inverter must never be opened or detached from
the motor while it is surrounded by an atmosphere which contains explosible dust!
Check the inverter for dust deposits regularly. When there is more dust than allowed,
heat from the inverter can no longer be carried off as effectively as required! If there is
doubt about whether the inverter is still performing reliably, the motor needs to be
stopped !
Always to ensure dust protection of the motor as well is immensely important with
regard to explosion protection.
Repairs on the frequency inverter must not be performed by any other party but
NORD as the manufacturer.