Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 142)

Chapter 6
Installation
6-18
ATTENTION: The motor field supply is phase sensitive. To
guard against possible drive/motor damage, ensure that the
connections are properly made according to Figure 6.8, 6.9, 6.11
and 6.12.
!
Figure 6.11
External Field Transformer Connections
TB1
2
3
4
5
TB1
1
40 –100 HP, 230VAC
75 – 200 HP, 460VAC
125-300 HP, 230VAC
250-600 HP, 460VAC
TB8
to Field Bridge
L1
L3
1
3
L1
L3
2
3
4
Field Transformer
Secondary
460V
1-30HP, 230VAC
2-60 HP, 460VAC
1. The primary of the external field transformer requires branch circuit protection, to be fused with FRN or FRS style fuses. Refer to NEC Code (and local codes) for
sizing.
2. As noted, the secondary of the external field transformer must be fused with semi conductor type fuses; type FWH-25 or FWH-50 depending on Drive HP rating.
230V
Field Transformer
Secondary
460V
230V
Sized to load
230V
Field Transformer
Secondary
50A
50A
25A
25A
FU
FU
L1
L3
FU
FU
1
1
1
FU
FU
1
1
460V
MKVA Series B
Series A
Series B
Circuit Board Jumper Connections
There are several jumpers located on different boards in the 1395 that are
used to configure the drive for a specific application.
1. Verify that the motor field current jumper is in the proper location per
Table 6.H. Obtain the motor full field current data from the motor
nameplate. The position of the jumper is determined by both the drive
current rating and DC shunt field current rating. Use the drive current
rating to select the column in Table 6.H and the field current to select
the field current jumper position.