Service information
276/293 Revision 11 • INSTALLATION AND OPERATING INSTRUCTIONS • NXPLUS C • 802-9081.9
Necessary checks
Depending on the panel type, the checks listed in the following table must be executed:
29.1 Visual check at the operating mechanisms and the three-position switches
• Check galvanically plated surfaces for traces of corrosion.
• Check lubrication of sliding surfaces.
• Check firm seating of all terminal connections.
29.2 Visual check of spring-operated mechanism
Refers to panel types:
• Circuit-breaker panel (panel width 600 mm)
• Bus sectionalizer panel (panel width 600 mm)
• Disconnector panel (panel width 600 mm)
• Ring-main panel (panel width 600 mm)
• Vacuum contactor panel (panel width 600 mm)
• Metering panel (panel width 600 mm)
Panel type Circuit-breaker panel Circuit-breaker panel
with 30,000 operating
cycles
Ring-main
panel
Bus sectionalizer
panel
Activity Panel width [mm]
600 900 600 600 600 900
Check galvanically plated surfaces for traces of corrosion X X X X X X
Check lubrication of sliding surfaces X X X X X X
Check firm seating of all terminal connections X X X X X X
Check smooth operation of control gate and interrogation
lever
X X X X X X
Visual check of spring-operated mechanism X - - X X -
Visual check of spring-operated/stored-energy mechanism
with fuse tripping
- - - - - -
Visual check of slow motion mechanism - X X - - X
Visual check of circuit-breaker operating mechanism X X X - - -
Visual check of vacuum contactor operating mechanism - - - - - -
Check functionality and smooth operation of the cable
compartment interlock
X X X X X X
Check fuse tripping - - - - - -
Panel type Disconnector
panel
Vacuum
contactor
panel
Vacuum contactor
panel with fuse
assembly
Metering
panel
Switch-disconnector
panel with HV HRC
fuses
Activity Panel width [mm]
600 900 600 600 600 600
Check galvanically plated surfaces for traces of corrosion X X X X X X
Check lubrication of sliding surfaces X X X X X X
Check firm seating of all terminal connections X X X X X X
Check smooth operation of control gate and interrogation
lever
X X X X X X
Visual check of spring-operated mechanism X - - - X
Visual check of spring-operated/stored-energy mechanism
with fuse tripping
- - - - -
X
Visual check of slow motion mechanism - X - - - -
Visual check of circuit-breaker operating mechanism - - - - X X
Visual check of vacuum contactor operating mechanism - - X X - -
Check functionality and smooth operation of the cable
compartment interlock
X X X X X X
Check fuse tripping - - - X X X
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