Rockwell Automation 1395 DC Drive, 800-1250 Hp, FRN 5.XX-9.30 - Manual (Page 23)

Chapter 2
Hardware Description
2-10
Armature Pulse Transformer (A24, A24A, A25, A25A) –
The primary functions of the Armature Pulse Transformer Board
(Figure 2.8) include:
•
Isolate power bridge circuitry from control circuitry.
There are 4 Armature Pulse Transformer Boards. Each board is associated
with each of 4 commutation groups. There are four boards for the Regen
and two for the Non-Regen. The board is physically mounted on the
armature power bridge, with screw terminals used to mount the board also
used as the connections to the incoming AC line and DC bus. SCR
connections are made at the spade terminals with the red and gray color
designations on the right side of the board.
Figure 2.8
Armature Pulse Transformer Board Hardware Location
J1
T1
T2
T3
C1
C2
C3
BR1
BR2
BR3
R3
R6
R9
R1
R4
R7
Red
Gray
Red
Gray
Red
Gray
A1, 4
A3, 6
A2, 5