NORD BU0310 User Manual

Getriebebau NORD

GmbH & Co. KG

Supplementary Instructions For ATEX-Designed

NORDAC trio SK 300E

Frequency Inverters

SK 300E-XXX-340-B-3D-T125

BU 0310 GB

NORDAC SK 300E frequency inverters

for use in areas with explosive gas atmospheres

General remarks

We urgently recommend reading these Operating Instructions before transporting,
installing, configuring or servicing a NORDAC frequency inverter. Each person
entrusted with any of the tasks mentioned above is supposed to follow both the Basic
Operating Instructions and the instructions contained in the present Supplement. All of
the safety information mentioned in the said manual and in the present Supplement
must strictly be observed to ensure personal and material protection. Prevention of
dangerous situations and damages crucially depends on safety instructions to be taken
seriously and to be implemented!

Other provisions and requirements to be taken into account include those applicable on
a national and local scale as well as the specific parameters and instructions relating to
the technical system of which the inverter will be a part.

Important!

In addition you should by all means be aware of the maximum allowable
operating speed and the maximum allowable output torque of the reducer unit.
These values are indicated on the reducer´s type plate and must never be
exceeded!

Skilled personnel with the proper qualification

It is presumed that all of the transport, assembly, installation, parameterization and
maintenance work is performed by technical personnel qualified for their tasks. The
term "qualified" is is understood to refer to individuals who, having been properly
trained and instructed and on account of their experience and knowledge of relevant
standards, accident prevention rules, and the respective operating conditions are
qualified to perform the tasks required to set the frequency inverter up for operation.
The personnel involved is also supposed to be familiar with First Aid measures and to
know how to reach the local rescue services.
If the Operating Instructions have got lost for some reason or other, another copy
should be obtained from NORD immediately.

Before starting any of the work related to the frequency inverter make sure that the
system is in a dead state electrically!

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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.

BU 0310 GB 3