Siemens 8DA10 Series Installation And Operating Instructions Manual

Also see for 8DA10: Operating instructions

861-9601.9 • INSTALLATION AND OPERATING INSTRUCTIONS • 8DA10 • Revision 11 203/214ServicingServicing41 MaintenanceUnder normal operating conditions, the fixed-mounted circuit-breaker switchgear 8DA10 andthe vacuum circuit-breaker 3AH49 are maintenance-free.Inspection/testing of the secondary equipment such as the capacitive voltage detectingsystem is done within the scope of national standards and customer-specific regulations.The switchgear should be inspected at the following intervals:MaintenancerecommendationVisual check every 5 yearsStatus inspection every 10 yearsMaintenance after 10000 operating cycles of the circuit-breaker(see page 204, "Maintenance of the vacuum circuit-breaker operating mechanism")These intervals are guidelines which have to be adjusted to the different operating conditions(e.g. dusty environment, frequent condensation, etc.). The maintenance actions with the associated test andmaintenance operations are shown in the following table.VisualinspectionStatusinspectionMaintenanceX X X Check and document SF6 gas pressure (see page 35, "Insulating gas")X X Check and document dew-point (humidity content) ( ≤ -15 °C)X X Check and document gas quality (air content) (SF6 share ≥ 95 %)X Check operating mechanism and interlocking of disconnector andearthing switch (if required, grease linkage and bearings)X In all gas compartments, if gas has to be exchanged or uponreaching the number of operating cycles:➭ Evacuate SF6 gas.➭ Replace desiccant bags.➭ Replace toroidal sealing rings.➭ Fill in SF 6 gas.➭ Check and document gas pressure.➭ Check tightness.