We are repairing servomotors, so the peak voltage shouldn't go beyond the 500 VAC; about the frecuency I am not sure, but we will be reading the feedback signals mainly the U, V and W feedback signal comming from a motor with up to 5000 RPM with at most 4 cycles per revolution. Hope this information...

We have an GWInstek GDS-1102A oscilloscope; is there any set of differential probes that could apply to this oscilloscope? and can you supply it?