A tripped overload when restarting a generator can typically be traced back to which issue?

A tripped overload when restarting a generator is often linked to issues related to the generator's internal components and their operational readiness. In this case, the dry sleeve bearing is a key factor.

When a generator is started, it requires sufficient lubrication to minimize friction between moving parts. If the sleeve bearings are dry, the friction increases, leading to excessive heat and strain on the generator's motor. This heightened resistance may trigger an overload condition, causing the protective overload relay to trip, preventing the generator from restarting safely.

This condition is particularly critical during startup when the generator faces an initial torque load. A properly lubricated bearing allows for smooth operation and reduces the risk of tripping the overload. Therefore, ensuring that the bearings are adequately lubricated is essential for the safe and efficient operation of a generator during startup.