Chapter 7 – Trouble Shooting & Maintenance
7-12
5)
Power Component Check – 500 HP ~ 700 HP
Module
Test polarity
Reading
Module
Test polarity
Reading
+
-
+
-
Line
Fuses
Fuse 1
R across fuse
Closed
Fuse
Indicators
Fuse 1
across indicator
Closed
Fuse 2
S across fuse
Closed Fuse
2
across indicator
Closed
Fuse 3
T across fuse
Closed Fuse
3
across indicator
Closed
These indicators are connected in series.
SCR's
SCR1/
SCR2
R P1
(+)
Open
Diodes
D1/
D2
R N
(-)
Open
P1 (+)
R
Open
N (-)
R
Closed
SCR3/
SCR4
S P1(+)
Open
D3/
D4
S N
(-)
Open
P1(+) S Open
N
(-) S Closed
SCR5/
SCR6
T P1(+)
Open
D5/
D6
T N
(-)
Open
P1(+) T Open
N
(-) T Closed
SCR5/6: Measurement is D7 and Pre-Charge Resistor
IGBT's
Tr1(1a)
U P1(+)
Closed
IGBT's
Tr4(4a)
U N
(-)
Open
P1(+) U Open
N
(-) U Closed
Tr3(3a)
V P1(+)
Closed
Tr6(6a)
V N
(-)
Open
P1(+) V Open
N
(-) V Closed
Tr5(5a)
W P1(+)
Closed
Tr2(2a)
W N
(-) Open
P1(+) W Open
N
(-) W Closed
Содержание RSi SG Series
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