802-9081.9 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • Revision 11 283/293
Service information
➭ Verify intact condition of the shaft ② (cracks, damages, etc.)
➭ Verify intact condition of the retaining elements ③ .
➭ Verify intact condition of the spring ④ .
➭ Check firm seating of all terminal connections ⑤ .
29.7 Cleaning, greasing and lubricating the operating mechanisms
• Clean the external parts of the switchgear and switching devices with a lint-free wiping
cloth at regular intervals.
Cleaning agent: Mild, customary household cleaner for general degreasing work and
cleaning work (solvent-free).
• If necessary, renew the anti-corrosion protection greasing.
• If necessary, lubricate the bearings.
Operating mechanism of
three-position switch
Use the following auxiliary means for the spring-operated mechanism, the spring-operated/
stored-energy mechanism and the slow motion mechanism of the three-position switch:
• For bearings, sliding surfaces: Molykote (R) MKL-N Grease
Circuit-breaker operating
mechanism
Use the following aids for the circuit-breaker operating mechanism:
• For bearings, sliding surfaces: Isoflex Topas L 32, Klüber
• For bearings that are inaccessible for grease: Tellus Oil 32
• For bearings of the auxiliary switches: Tellus Oil 32
For suppliers and manufacturer information of lubricants: see page 284, "Permissible
lubricants".
Vacuum contactor
operating mechanism
It is not required to clean, grease or lubricate the operating mechanism of the vacuum
contactor.
29.8 Test operation of the operating mechanisms
➭ Mount the front cover of the operating mechanisms.
If one of the operating mechanisms does not operate correctly, please contact the regional
Siemens representative.
➭ Operate the operating mechanism of the three-position switch several times mechanically
by hand for test.
➭ Operate the operating mechanism of the circuit-breaker several times mechanically by hand
for test.
➭ Operate the operating mechanism of the vacuum contactor electrically 5 times for test.
NOTICE
Contact by cleaning agents
Can cause property damage. Joints and bearings which cannot be dismantled may be
damaged by cleaning agents.
➭ Do not use cleaning agents to clean joints and bearings which cannot be dismantled.
DANGER
Hazardous voltage
Can cause death, injury or considerable property damage.
➭ Always observe the Five Safety Rules of Electrical Engineering.
➭ Observe the specifications for prevention of accidents.
➭ Observe the operating instructions and work instructions of the switchgear operator.
➭ Observe the the installation and operating instructions of the switchgear.
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