Rockwell Automation SD3100 DISTRIB PWR SYS SD3100 DC PWR MODULE - Manual (Page 17)

Mechanical/Electrical Description 2-3
Below the PMI rack is a DPS Parallel Gate Amplifier (PGA), which provides isolation
and amplification of the forward and reverse gate drive signals. The Field Power
Module is mounted to the left of the PMI and PGA racks. At the top of the assembly
are the field isolation transformer fuses and a scaling unit that conditions the armature
feedback signals received via terminal block TB1. Terminal blocks at the bottom of the
assembly provide connection for the field gate and feedback signals (TB2), control
power (TB3), drive I/O (TB4), the resolver (TB5), and the meter ports (TB6). The
forward and reverse armature gate coupler circuits connect to the control circuitry at
the lower right of the compartment.
The Power Module is shipped with the PMI Regulator and all related control
components installed. The PMI is described in detail in the Power Module Interface
Rack and Modules instruction manual (S-3008). Please refer to this manual for further
information. Additional information on the PGA can be found in instruction manual
S-3045.
2.1.2 Power Components
Power components manage and handle the power of the drive under the direction of
the PMI regulator. The power components consist of:
• the incoming power components
• the armature power bridge components
• the Field Power Module
2.1.2.1 Incoming Power
The incoming power components handle the input power and provide it to the Field
Power Module and armature power bridge assemblies.
The following components are used to provide incoming power:
• circuit breaker or input line fuses
• user-supplied input line reactor or isolation transformer
• control power and Field Power Module tap
• user-supplied field isolation transformer
• AC line RC suppressor
Circuit Breaker
Power Modules are provided with circuit breakers to protect the input power wiring.
Recommended circuit breaker settings are shown in Appendix A.
Input Line Reactor or Isolation Transformer
The SD3100 system requires a user-supplied line reactor or isolation transformer to
reduce peak currents and harmonics in the incoming power lines. This device is
needed to provide isolation to other equipment on the power lines during regeneration.
Important: Failure to use an input isolation device may result in damage to the Power
Module during regeneration.