BENSHAW RSi SG Series, Instruction Manual

Page: 183 / 218

Chapter 7 – Trouble Shooting & Maintenance
7-11
4) Power Component Check – 350 HP ~ 400 HP
Module
Test polarity
Reading Module
Test polarity
Reading
+ -
+
-
DC Bus
Fuses
Fuse 1
across fuse
Closed
Fuse
Indicators
Fuse 1 across indicator Closed
Fuse 2
across fuse
Closed Fuse 2
across indicator
Closed
Fuse 3
across fuse
Closed Fuse 3
across indicator
Closed
Fuses are in parallel, visual check indicators first
SCR's
SCR1
R P2 (+) Open
Diodes
D4
R N (-) Open
P2 (+) R Open N (-) R Closed
SCR2
S P2 (+) Open
D5
S N (-) Open
P2 (+) S Open N (-) S Closed
SCR3
T P2 (+) Open
D6
T N (-) Open
P2 (+) T Open N (-) T Closed
SCR3: Measurement is D1/D2 and Pre-Charge Resistor
IGBT's
Tr1
U P2 (+) Closed
IGBT's
Tr4
U N (-) Open
P2 (+) U Open N (-) U Closed
Tr3
V P2 (+) Closed
Tr6
V N (-) Open
P2 (+) V Open N (-) V Closed
Tr5
W P2 (+) Closed
Tr2
W N (-) Open
P2 (+) W Open N (-) W Closed