Rockwell Automation 1391ES AC Servo Controller - Manual (Page 56)

9 Chapter
9-54
Transformers and Shunt Regulators
Chapter Objectives Chapter 9 provides general information about the 1391 Isolation
Transformer. In addition, shunt regulator information is also provided.
1391 Transformers The 1391B-ES must operate from an isolation transformer having a
three-phase, 230V AC output and a single-phase, 36V AC output.
Transformers supplied with the 1391B-ES can provide power for up to four
controllers. Standard three-phase input voltages for the 60 Hz units are
available. The kVA values specified are the continuous outputs of the units
in a 60
°
C ambient.
Important: The maximum rating that can be connected to the 1391B-ES is
15 kVA.
Important: The 1391B-ES controller uses a phase sensitive 36V AC
transformer tap to provide power to the Logic Control Board. It is
recommended that a 1391 Isolation Transformer be used. Contact your
local Allen-Bradley Sales Representative if a transformer of a different
type must be used. Refer to Figure 9.1 and Appendix B for connection
information.
ATTENTION: Damage to the controller will result if the center
tap wire (Y2, Y5, Y8, Y11) shown in Figure 9.1 is not
connected to TB4-20 as shown in Appendix B.
!
60 Hz Transformers
Two 60 Hz transformers are available and have input ratings of:
1. 240/480V AC , three-phase
2. 208/230/460/575V AC, three-phase