10
4.6. IP SCR Board (only for 3-phases input/single phase output)
Frame diagram of the SCR board
The input of IP SCR board is connected to the another two phases. The input utility
power were rectified by 4 SCRs. And the output send to the rec/- on the PSDR
board.
4.7. CCB
（
only for 3T15KS/3T20KS
）
The CCB (common control board) is used to connect the PSDR board and the CNTL
board. It may help the CNTL board to control both the primary and secondary PSDRs.
4.8. EMI board
Input EMI choke board is connected between mains and the input of PSDR.
Output EMI choke board is connected between the ouput of PSDR and output terminal
block.
