9.3.1.1 Working on machines with type of protection "Ex d/Ex db"
For explosion-protected machines with type of protection "Ex d" or "Ex db" in accordance with
IEC / EN 60079–0 and IEC / EN 60079–1, observe the following:
● Machined contact and fitting surfaces on the following components must not be reworked
or painted:
– Stator frame
– Bearing end shields, bearing cover
– Motor shaft
– Gland plate
– Terminal box base, terminal box cover
– Cable entry plates for additional terminal boxes, if available
● Keep these surfaces clean and protect them against corrosion by applying a thin coating
of grease. It is not permissible that any seals are fitted between the surfaces that guarantee
that flame is not transmitted.
9.3.1.2 Static charging when cleaning
Risk of explosion due to static charging
If you clean the motor, plastic components may become statically charged and ignite a
potentially explosive atmosphere. An explosion can occur. This can result in death, serious
injury or material damage.
● When cleaning ensure that there is absolutely no explosive atmosphere present.
● Clean the plastic parts and components so that absolutely no static charging occurs
● Do not use compressed air for cleaning.
9.3.2 Inspections in the event of faults
Natural disasters or unusual operating conditions, such as overloading or short circuit, are
faults that overload the machine electrically or mechanically.
Immediately perform an inspection after such faults.
Maintenance
9.3 Inspection and maintenance
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
88 Operating Instructions 06/2018
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