Diligent Protector for shear pin replacement is unique. Shear pin disengages the motor from the load by breaking itself when load increases beyond the permissible level. However, replacement of shear pin is associated with inherent uncertainties of material quality. This renders shear pin protection less reliable. Diligent Protector Replacement for shear pin is unique. Not only it provides precise and repeatable protection but it also has provision to adjust the protection level which enables to match the protection to the load. This relay can be made auto reset type or manual reset type.