
9-20 Troubleshooting
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Heatsink 1
SCR1
SCR 2
SCR3
SCR4
Heatsink2
Heatsink 3
Heatsink 4
Heatsink 5
Note: SCR 1 and SCR 3 are a matched set.
SCR 2 and SCR 4 are a matched set.
Heatsink 1
SCR1
SC
R 2
SCR3
SCR4
Heatsink2
Heatsink 3
Heatsink 4
Heatsink 5
Note: SCR 1 and SCR 3 are a matched set.
SCR 2 and SCR 4 are a matched set.
Figure 9.8 – Power Module Assembly (one phase) • 3300/4160 V, 180/360 A
Gap
Centre Nut
(Do not loosen)
Indicating Washer
Locking Nut
(Do not adjust)
(Do not loosen)
To remove clamp pressure, loosen
lower center nut so that the gap between
the clamp surface and the heatsink is
approximately 6 mm (0.25 in.).
Gap
Centre Nut
(Do not loosen)
Indicating Washer
Locking Nut
(Do not adjust)
(Do not loosen)
To remove clamp pressure, loosen
lower center nut so that the gap between
the clamp surface and the heatsink is
approximately 6 mm (0.25 in.).
Figure 9.9 – Heatsink Clamp
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