In my Flight Safety manual it shows the following infor:
PT6T-3B PT6T-3D
100%Torque Twin engine torque limit
1800 SHP !800 SHP
Continuous Twin engine Torque limit
1600 SHP 1600 SHP
Continuous OEI Torque Limit
970 SHP 970 SHP
765 C ITT 820 C ITT
30 minute OEI ITT Limit
970 SHP none
822 C ITT
2.5 minute OEI ITT LIMIT
1025 SHP 1100 SHP
850 C ITT 925 C ITT
Hope this helps