SJB,
Here is the curve for the CR frame and fuse (TD4962)
Zogzog, know I know where to get one when needed, Thanks!
Mikehttp://files.engineering.com/getfile.aspx?folder=b9d3bc47-1181-4ed9-947d-109c2baa412b&file=Siemens_CR_Curve_TD4962.pdf
Eaton has a solution aswell using the Magnum DS, I believe the catalog number would be 50HL-AR1600M, AR means air replacement. You could also get the Digitrip 1150 with maintenance mode for arc flash reduction.
Mike
SJB, I have 11x17 sets of curves for the older ITE Gould vintage breakers at the office. IIRC the fuse curves are in it as well. I will not be back in until Tuesday, I could scan it for you then.
The current replacement (if not obsoleted already) would be the Siemens CRD6 series...