Influence of Vibration on Aging
Vibration
|
Influence |
Appearance |
Consequences |
|
|---|---|---|---|
|
Premature deterioration of contact surfaces (clusters and main contacts) |
Not identifiable |
Increased device temperature rise |
|
|
Loosening of bolted assemblies |
Not identifiable |
Increase in mechanical play |
|
|
Wear of mechanical parts |
Not identifiable |
Broken springs. Increase in mechanical play between parts |
|
|
Appearance of fretting corrosion on auxiliary connections |
Not identifiable |
Erroneous information or interruption of continuity in data or supply, excessive temperature rise |
|
|
Breaking of connectors on large electronic components (for example, large capacitors) |
Not identifiable |
Potential failure of protection function |
|
Recommendations
The maintenance and installation recommendations according to the vibrations are defined in the following table:
|
Thresholds (g) |
Description |
Maintenance recommendations |
Installation recommendations |
|---|---|---|---|
|
≤ 0.2 g |
Normal condition, no impact on service life |
Implement the Intermediate program. |
No particular recommendation |
|
0.2 g to 0.5 g |
Reduced service life |
Carry out more frequent periodic checks. |
No particular recommendation |
|
0.5 g to 0.7 g |
Significant increase in incidents |
|
Install switchgear on a rubber mounting bushing |
|
≥ 0.7 g |
Forbidden for standard devices |
– |
Use special devices |