110-0134.9 / 13 NXAIR / ≤ 40 kA 417
Read and understand these instructions before attempting operating works.
29.1 Maintenance
Maintenance ensures undisturbed and uninterrupted operation of the switchgear. The frequency of
inspection, periodic cleaning and preventive maintenance schedule will depend upon the operating
conditions of the switchgear.
The maintenance measures are divided into the following fields:
• Visual inspection
• Maintenance
Non-observance of instructions
Non-observance of the following instructions can damage the switchgear.
• All measures within the scope of maintenance may only be executed by
qualified personnel.
• Furthermore, the relevant IEC standards and the local and site-related
safety regulations must be observed.
• For questions about maintenance measures, please contact your regional
Siemens representative.
29.2 Time schedule for maintenance measures
Besides the recommended maintenance intervals, additional maintenance measures may be required for
operational reasons.
Recommended time schedule for maintenance measures:
Every year or at the operator's
discretion.
Every 10 years, or depending on
operational facts, or at the operator's
discretion.
For example, after a short circuit or
breaking / making operation of a circuit-
breaker and/or an earthing switch when the
permissible number of operating cycles has
been reached.
Depending on operational facts, or at
the operator's discretion.
Visual inspection, maintenance.
According to advice and requirements in Operating Instructions of circuit-breaker.
According to advice and requirements in Operating Instructions of vacuum contactor.
Protection relays
and instruments
According to advice and requirements in respective instruction manuals.
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