GE Industrial Solutions AF-600 FP High Power (460V_575V 150HP and above) - Manual (Page 114)

7.2.11 SCR/Diode Module 42/44 Units
1. Remove the lower DC capacitor bank per instructions.
2. Remove the input terminal plate per instructions.
3. Remove the retaining nuts (8 mm) from the SCR input bus bars, one for each input phase.
4. Note the colour coding for each of the three wires attached to the retaining studs. Ensure that the correct wire is attached to the applicable stud during
reassembly. Remove the wiring from the studs.
5. Remove screw (T30) from terminal 1 of each SCR/diode module by accessing the screw through access hole in the SCR/diode input bus bar. Remove
the SCR input bus bars.
6. Remove each IGBT output bus bar by removing the nut (13 mm) from the stud. Also remove the retaining screw (T40) at other end of the IGBT output
bus bars (not shown).
CONTINUED NEXT PAGE
130BX161.10
1
2
3
4
5
6
Illustration 7.1: 42/44 SCR/Diode Module (1 of 4)
1 SRC/diode input bus bar retaining nut and stud (Steps 3 & 4) 4 IGBT output bus bar retaining nut (Step 6)
2 SRC/diode terminal screw (Step 5) 5 SRC/diode terminal screw (Step 5)
3 SRC/diode input bus bar BB21 or BB22 per drive power rating 6 IGBT output bus bar BB32 (Step 6)
AF-650 GP and AF-600 FP High Power Service Manual
113
7