Yaskawa GPD503 Drive - Manual (Page 145)

IGBT TRANSISTOR MODULE
Measure the resistance across the module terminals with a volt-ohm meter. Set the meter
to the X1 range. Measured resistance should be within the values listed in Table A4-2.
RESISTANCE TEST FOR 3Ø TRANSISTOR MODULES
VOM RESISTANCE SCALE R x 1
+ IS THE POSITIVE POLARITY LEAD *
- IS THE NEGATIVE POLARITY LEAD
* THE VOM RED LEAD IS NOT NECESSARILY THE POSITIVE POTENTIAL IN THE RESISTANCE MODE.
FOR THESE TESTS THE + LEAD REFERS TO THE POSITIVE POTENTIAL. MAKE SURE YOU KNOW
WHICH POLARITY YOU HAVE ON YOUR VOM.
** OR 0.3 TO 0.7, FOR DIGITAL METER ON ——— (DIODE DROP) SCALE.
A4-2
+ – NORMAL ABNORMAL
READING READING
ON ON (OHMS) (OHMS)
P+ T1
P+ T2
P+ T3
T1 N- INFINITE 0
T2 N-
T3 N-
T1 P+
T2 P+
T3 P+ 5 to 50 ** 0 or INFINITE
N- T1
N- T2
N- T3
+ – NORMAL ABNORMAL
READING READING
ON ON (OHMS) (OHMS)
+ – NORMAL ABNORMAL
READING READING
ON ON (OHMS) (OHMS)
G1A T1
G1B T2 LESS
G1C T3
G2A N- INFINITE THAN
G2B N-
G2C N- 1M
T1 G1A LESS
T2 G1B
T3 G1C INFINITE THAN
N- G2A
N- G2B 1M
N- G2C
+ – NORMAL ABNORMAL
READING READING
ON ON (OHMS) (OHMS)
Table A4-2. Transistor Module Resistances
▲ ▲ ▲
▲
▲ ▲ ▲
● ●
● ●
●
●
●
G1A
E1A E1B E1C
C2A C2B C2C
G1B G1C
G2A
E2A E2B E2C
G2B G2C
C1A C1B C1C
T1 (A
q
T2 (B q ) T3 (C q )
P +
N –