YASKAWA VS-505WII - Reference

(REFERENCE)
ROUGH CHECK OF THYRISTORS
Where thyristors normally
function, the following
values
are obtained .
More than
several hundreds of kiloohms across

Several ohms to several hundreds of ohms
across
(A) and (K) .

(G) and (K) .
IPA
RPA
1 6
FS
FT
(a) Resistance across thyristor

(b) Resistance across thyristor
terminals (A)
and (K)

terminals (G) and (K)
ELEMENTARY DIAGRAM OF
THYRISTOR CONVERTER UNIT
(TYPE CDMR-W
II,
230V, 90A)
P15
RT=4-p
18
P19, P20
1PCB
G1
K1
K2
G2
G1
K1
N3,4
Y 1,
Y5
I R1
Il
R
.)
J P DC- P 05()
FPA~ ,
RPA i
G1
Thyristor fails
i f 0 or - is in-
dicated
on the
even
either
tester (x
1 0
range)
Fig .
25 Rough Check of Thyristors
AC POWER SUPPLY
200/220V 50/60Hz
----------- ~----------
Fig . 26 Main Circuit
500
W1
500
Thyristor
fails
if 0 or - is in-
dicated
on the
even either
tester (x 1 S2
ran ge )
CONTROLLER
JPDC-CO41
R
1PCB