Overload
In industrial maintenance and CMMS contexts, overload is the operation of equipment or a conductor in excess of its normal full-load rating or rated ampacity, where persistence causes damage or dangerous overheating; it is distinct from a fault like a short circuit because current still flows through the intended path.
On the shop floor, overload is monitored via motor current sensors, thermal protectors, and CMMS trend analysis. When a motor draws 1.1x–6x rated current due to mechanical strain, blockage, or undersized cabling, maintenance triggers a thermal trip, inspection, or load reduction to prevent insulation melting and fire. This gradual failure mode allows for early detection through CMMS indicators, such as computed zero offset in load cells, enabling proactive maintenance to avoid catastrophic damage.
How does overload differ from overrange in sensors?
Overload is the mechanical safety factor (e.g., % of full scale) before yield/deformation; overrange is the maximum input the sensor can measure without permanent damage.
What CMMS indicator signals probable overload in load cells?
A computed zero offset >20% indicates definite overload; 10–20% suggests probable overload.
Why is overload a slow, gradual failure mode?
Current increases gradually (1.1x–6x rated), allowing thermal trips to respond after brief inrush currents, unlike instantaneous short circuits.