Working On Machines With Type Of Protection "Ex D/Ex Db; Static Charging When Cleaning; Inspections In The Event Of Faults - Siemens SIMOTICS HV C Operating And Installation Instructions

Maintenance
9.3 Inspection and maintenance
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
● Keep these surfaces clean and protect them against corrosion by applying a thin coating
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.
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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
of grease. It is not permissible that any seals are fitted between the surfaces that guarantee
that flame is not transmitted.
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018