Service Information; Maintenance; Maintenance Of Circuit-Breaker 3Ah25 With 30000 Operating Cycles - Siemens NXPLUS C Installation And Operating Instructions Manual

Service information

Secondary equipment
Checking the dew point
Replacement of
components
Checking the gas quality
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Service information
28

Maintenance

Under normal operating conditions, the fixed-mounted circuit-breaker switchgear NXPLUS C,
the vacuum circuit-breaker 3AH55 and the vacuum contactor 3TL7 are maintenance-free.
The switchgear vessel represents a hermetically sealed pressure system according to
IEC 62271-200. Maintenance of the insulation filling is not required.
Inspection/testing of the secondary equipment such as the capacitive voltage detecting
system is done within the scope of national standards and customer-specific regulations.
The dew point needs no checking throughout the entire service life.
Due to the fact that all parts of this switchgear type have been optimized to last the normal
service life, it is not possible to recommend particular spare parts.
The gas quality needs no checking throughout the service life.
28.1

Maintenance of circuit-breaker 3AH25 with 30000 operating cycles

The 3AH25 circuit-breaker with 30,000 operating cycles must be lubricated after 10,000 and
20,000 operating cycles.
Permissible lubricants:
• Isoflex Topas L 32
• Tellus Oil 32
For suppliers and manufacturer information of lubricants: see page 284, "Permissible
lubricants".
Auxiliary means
• Thin brush (length: min. 30 cm)
• Oil can with a thin outlet with a length of 30 cm as a minimum
• 2 cable straps
• Battery screwdriver or hexalobular socket screwdriver (Torx)
Hazardous voltage.
Will cause death, serious injury and property damage.
Always observe the Five Safety Rules:
➭ Isolate.
➭ Secure against reclosing.
➭ Verify safe isolation from supply.
➭ Earth and short-circuit.
➭ Cover or barrier adjacent live parts.
Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
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