User Manual

Rockwell Automation Publication 20P-UM001K-EN-P - July 2014 35

Installation and Wiring Chapter 1

Figure 12 - High-impedance Ground

Grounding the Wye secondary neutral through a resistor is an acceptable method

of grounding. In this case, in a short-circuited secondary condition, none of the

output phases to ground will exceed the normal line to line voltage. The resistor

is often used to detect ground current by monitoring the associated voltage drop.

Table 8 - Drive Modifications to Support Ungrounded Wye Neutral or Impedance Grounded

Connections

Figure 13 - Frame A Pulse Transformer Circuit Board S9 Jumper Location

Frame Circuit Board Jumper/Connection Figure to see for Details

A Pulse transformer (FIR1-xx-xx) Remove jumper S9 Figure 13

on page 35

B Pulse transformer (FIR2-xx-xx) Remove jumper S9 Figure 14 on page 36

C Pulse transformer (FIR3-xx-xx) Remove jumper S9 Figure 15 on page 36

Transient noise filter (FIL-31),

200V…500V AC drives

Disconnect the filter board yellow/

green (ground) wire from the PE

connection on the drive chassis

Figure 16 on page 37

Transient noise filter (FIL-57,

FIL-69), 575V…690V AC drives

Remove jumper S1 Figure 17 on page 37

D Pulse transformer (FIR-D-xx-xx) Remove capacitors C121 and C122 Figure 18 on page 38

Overvoltage clipping (CFSF-xxx) Remove jumper S1 Figure 19 on page 38

T01 T04 T02 T05

T03

T06

T1 T4 T2 T5 T3 T6

78 79 35 36 75 76 U2 V2

TR2 TR1

XSW

XSW1

Note: Remove the front covers from the

drive to access the pulse transformer circuit

board. See page 27

for instructions.