Need help with LNK623 design

We have an industrial controller used in Solar application. It has two inputs for power supply:
1) R Phase of Grid (R-N nominal 240VAC, 50Hz): Wide variation in input, upto +/-30% change, with 45-55Hz
2) 48VDC (Variation from 40-60VDC)

We want to generate 2 output voltages from the SMSP power supply: An isolated 5V for isolated RS485 communication (max 200mA load) and a 5V supply for driving relays with total load of 800mA. We are using LNK623 for this application.

We also want the power supply to be protected upto 10kV (1.2/50us / 8/20us combinational waveform) surge on either AC or DC input. Ambient temperature is from -20C to 85C.

Attached is the schematic of an old power supply circuit we have used in another controller. We have lost the calculation for this circuit. Please show us the calculation and let us know the changes if any in the circuit.

Transformer details are as following:

Core Type: EE13 (ferrite), gapped
AL Value: 155 nH/turn²
Primary Inductance: 1.548 mH

Windings Table
Winding         Turns         Wire Gauge          Winding Direction       Pins
Primary         100T           40 SWG                  Clockwise                        1,2
Sec 1               18T             34 SWG                  CW                                       9,10
Sec 2               12T             32 SWG                  CW                                       6,7
Sec 3              13T × 4       42 SWG multifilar CW                                   4,5


This project is bit urgent so any quick help will be much appreciated.