DANGER!
Risk of fatal injury from electrical current!
Stored electric charge.
Discharge time of the system = discharge time of the device with the longest DC link
discharge time.
Therefore:
m Do not touch electrically live parts before taking into account the discharge time of
the capacitors.
m Pay attention to the corresponding notes on the device.
m If additional capacitors are connected to the DC link, the DC link discharge can
take a much longer time. In this case, the necessary waiting period must itself be
determined or a measurement made as to whether the equipment is de-energized.
This discharge time must be posted, together with an IEC 60417-5036 (2002-10)
warning symbol, on a clearly visible location of the control cabinet.
Maintenance
Instruction handbook BUM 60 / BUS 60
Document No.: 5.01032.05
61
of 82
9
9.3.1 Periodic maintenance
m Environmental condition
Check points Methods and criteria Inspection intervals
Daily Semi-
annu
-
ally
Annu-
ally
Check environmental temperature, humidity and
vibrations.
Check whether dust, oil or drops of water appear.
Visual inspection and measurement of the environmen-
tal conditions, comparison with standard values.
O
Check whether there are hazardous objects in the
vicinity.
Visual inspection O
m Voltage
Check points Methods and criteria Inspection intervals
Daily Semi-
annu
-
ally
Annu-
ally
Check the voltage of the power supply system and
the control circuits
Measurement and comparison with standard values. O
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