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D-101
Additional information
Maintenance
Preventive maintenance
Frequency
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The frequency of preventive maintenance depends primarily on the operating
conditions of the electrical switchboard.
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For operating conditions found in normal environments, the frequency should be
as indicated in the recommended calendar.
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It may be extended if the switchboard is used in a particularly clean environment
and not in an intensive manner.
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It must be reduced if the switchboard is used in a particularly aggressive
environment (dust, humidity, corrosive vapours, heat) or is used intensively.
Recommended calendar
Type
Action
Frequency
General inspection
Visual checks and general
cleaning.
Visual check of busbars.
Running tests
Once a year
Maintenance on functional units Inspection of the connections Every 5 years
Maintenance of ventilation
system
Cleaning of filters
Every 6 months
Maintenance of devices
According to the respective handbooks
General recommendations
Before any intervention on the connections, switch off the functional unit, remove the
protective screens and the partitioning sheets and boxes.
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For interventions on the connections, refer to chapter "Connections", profession
Install.
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When reassembling the connections:
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use new screws, washers, nuts of the same type (class 8.8)
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tighten to the defined torque (refer to the tightening torques table in the chapter
"Connection/Tools required")
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apply varnish.
Method of inspection of the electrical connections
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Connections by lugs or screwed bars: presence of varnish, colour changes of a
copper bar.
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Connections by cage type terminals: if necessary, re-screw to the torque defined
by the manufacturer to compensate for a possible creep.
Please ensure that you consult the "General" chapter section dealing with
safety instructions.