Service Instructions; Maintenance; Switchgear Extension And Replacement Of Panels And Components - Siemens NXPLUS C Installation And Operating Instructions Manual

Operation
Replacement of
components
Checking the dew point
Checking the gas quality
Special operating
conditions
168/172
27

Service instructions

27.1

Maintenance

The fixed-mounted circuit-breaker switchgear NXPLUS C Wind with the vacuum circuit-breaker
3AH55 is maintenance-free under normal operating conditions. The switchgear vessel is
designed as a "sealed pressure system" according to IEC 62 271-200, i.e. maintenance of the
insulation filling is not required.
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 dew point needs no checking throughout the entire service life.
The gas quality needs no checking throughout the entire service life.
If the switchgear is used in abnormally unfavorable indoor conditions beyond the normal
operating conditions (e.g. frequent heavy condensation, dust-ridden air, etc.) we recommend
to clean the external parts of the vacuum circuit-breaker operating mechanism, and, if
necessary, to renew the anti-corrosion protection greasing at regular intervals. To do this, you
may only use the materials specified hereafter on the individual functional parts of the circuit-
breaker.
Permissible cleaning agents/lubricants:
• For bearings, sliding surfaces: Isoflex Topas L 32, Klüber - Lubrication KG,
Geisenhauer Str. 7, Postfach 70 10 47, D-81310 München
• For bearings that are inaccessible for grease, and bearings of the auxiliary switch S1:
Tellus Oil 32, Shell Direct GmbH, Suhrenkamp 71, D-22335 Hamburg
ATTENTION!
Parts of the switchgear that cannot be dismantled may be damaged if they come into contact
with cleaning agents.
Do not wash joints and bearings which cannot be dismantled with a cleaning agent.

Clean the external parts of the circuit-breaker at regular intervals.

Renew the anti-corrosion protection greasing.

Operate the circuit-breaker several times mechanically by hand for test.

27.2

Switchgear extension and replacement of panels and components

The individual components, such as measuring instruments, current transformers, etc. can be
replaced. For switchgear extension and replacement of components, please contact the
regional Siemens representative. Due to the busbar concept, switchgear extension or panel
replacement is possible without gas work.
Information required for spare part orders of single components and devices:
• Type and serial number of the switchgear and the circuit-breaker (see rating plates)
• Precise designation of the device or component, if applicable on the basis of the information
and illustrations in the associated instructions, a drawing, sketch or circuit diagram
Revision 05 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C Wind • 802-9074.9