text: <s>[INST] PF755 How to proof test shear pin current limit Summary: Assuming shear pin been underpinned by Rockwell (TUV), should shear pin limit be physically tested?The PF753/755 offers shear pin current limit, but has this been underpinned by Rockwell (TUV) to work? Or should the shear pin limit be physically test? If shear pin is setup, can the parameters (Case ID [/INST] I'm not sure why you would assume that shear pin has been underpinned. Please refer to the programming manual: http://literature.rockwellautomation.com/idc/groups/literature/documents/pm/750-pm001_-en-p.pdf and to the reference manual: http://literature.rockwellautomation.com/idc/groups/literature/documents/rm/750-rm002_-en-p.pdf Page 188 of the reference manual defines the shear pin function as instantly faulting the drive if it reaches the user-specified current. The fault current can be set from 0 to 1.5 times the rated amps in Parameter P21, with default being the rated amps. You can program the drive to delay the fault for a user-specified amount of time. Refer to page 98 of the programming manual for shear pin parameters. In order to test, you would do as you describe and set the trip level to a low safe value, but you'd need to have a way of independently measuring drive current. \\n </s>