Rockwell Automation RELIANCE ELECTRIC SP500 - Page 94

Table 9.2 — Resistance Checks for Input Diodes
Meter
Input Connection ; ; ;
Diode Component is OK if Component is
No. (+) (-) resistance (R) is: defective if:
1 * R/L4 50 <R <10Megohm Continuity (short circuit) or
open when the meter is
2 . S/L2 connected with reversed
larity.
3 * TIL3 polarity
4 R/L1 **
5 S/L2 **
6 T/L3 **
* (+) DC bus volts power terminal
** (_) DC bus volts power terminal
Table 9.3 — Resistance Checks for IGBTs
Meter
Connection . . ;
IGBT Component is OK if Component is
No. (+) (-) resistance (R) is: defective if:
1 * W/T3 50 <R<10Megohm Continuity (short circuit) or
; open when the meter is
2 v/T2 connected with reversed
3 : UT polarity.
4 W/T3 “
5 V/T2 *
6 U/T1 “*
* (+) DC bus volts power terminal
** (_) DC bus volts power terminal
9-8 SP500 AC Drive Installation and Operation Manual Version 3.1