832-6063.0 * MAINTENANCE SIMOSEC * REVISION 02
87
Maintenance
Maintenance
22
Switchgear maintenance
Periodic inspections and maintenance are essential to obtain safe and reliable operation
of the switchgear. When SIMOSEC switchgear is operated under "Usual Service
Conditions", maintenance and lubrication is recommended at ten year intervals. The
maintenance intervals of devices (e.g., relays, PLC’s, etc.) installed in the switchgear
may differ. "Usual" and "Unusual" service conditions for Medium Voltage Metal-Enclosed
Interrupter Switchgear are defined in ANSI/IEEE C37.20.3, clauses 4 and 8.1. Generally,
"usual service conditions" are defined as an environment in which the equipment is not
exposed to excessive dust, acid fumes, damaging chemicals, salt air, rapid or frequent
changes in temperature, vibration, high humidity, and extremes of temperature.
The definition of "usual service conditions" is subject to a variety of interpretations.
Because of this, you are best served by adjusting maintenance and lubrication intervals
based on your experience with the equipment in the actual service environment.
• Under indoor operating conditions, SIMOSEC requires low maintenance.
• The climatic and local ambient conditions determine the extent of cleaning work to be
performed.
• We recommend an annual visual inspection. If required, the intervals have to be adju-
sted to the climatic and local ambient conditions.
• Independently of the regular maintenance, immediately determine the cause of faults
and short circuits as well as partial discharges, and replace damaged parts by original
parts if required.
• If you have any questions, please contact Siemens Service (see “Field Service Opera-
tion” on page 6).
Introduction and
Maintenance Intervals
Regardless of the length of the maintenance and lubrication interval, Siemens
recommends that switching devices should be inspected and exercised annually.
For the safety of maintenance personnel as well as others who might be exposed to
hazards associated with maintenance activities, the safety related work practices of
NFPA 70E should always be followed when working on electrical equipment.
Maintenance personnel should be trained in the safety practices, procedures and
requirements that pertain to their respective job assignments. This manual should be
reviewed and retained in a location readily accessible for reference during maintenance
of this equipment.
The user must establish a periodic maintenance program to ensure trouble-free and safe
operation. The frequency of inspection, periodic cleaning, and preventive maintenance
schedule will depend upon the operation conditions. NFPA Publication 70B, "Electrical
Equipment Maintenance" may be used as a guide to establish such a program.
