CLP Example

The situation described above is depicted graphically in the figure below.

In this example the supply goes off for four hours. Over the first two hours, the OCLM increases from x1 to x2. The supply stays off for another two hours but the OCLM doesn’t increase any further because it’s reached its maximum setting. When the supply comes back on, the load current is significantly higher than usual but doesn’t cause a protection pickup because it doesn’t exceed the Setting Current x the OCLM.

Over the next two hours the OCLM ramps down from x2 to x1 and is always above the load current which also tapers off over that time.