Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 75)

Chapter 4
Hardware Description
125 – 300 HP, 230VAC 250 – 600 HP, 460VAC
4-11
Armature Pulse Transformer Boards (A2, A3, A4) – Figure 4.8
illustrates the major hardware points on the board. The primary functions
performed include:
•
Isolate power bridge circuitry from control circuitry
•
Provides Gate Pulses to the SCRs
There are three Armature Pulse Transformer Boards. Each board is
associated with a single phase of the incoming AC line. The board is
physically mounted on the armature power bridge buswork, with the screw
terminals used to mount the board also used as the connections to the
incoming AC line and the DC bus.
Figure 4.8
Armature Pulse Transformer Board Hardware Location
AB0659A
Armature Pulse
Transformer Board
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