Owner manual

Overview P-7
PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
Figure P.3 1000A SCR Bus Supply Master Unit Schematic Diagram
The primary electrical components for the 1000A SCR Bus Supply Master
Unit are:
NOTE: There is no DC output fuse protection in the 1000A SCR unit.
>°C
F12
K1
A2
A1
F6
F2
F1
F4
F5
F3
F7-11
L1 L4L5L3L2
K1
22
4321 3313
443414
X1
GND
12
115
0
1
4
2
5
6
8
7
9
10
11
3
2
V3
45
3
2
V5
45
3
2
V1
45
3
2
V4
45
3
2
V6
45
3
2
V2
45
L1
L2
L3
PE
+
-
+
+
-
X3
X4
X6
2
1
X1
3
X3
X2
L1 L2
L3
1
1
8
7
5
4
2
X5
5
4
3
2
6
1
3
4
5
6
7
9
12
11
10
8
12 7854126543X2
7
8
9
10
11
12
1
2
3
4
5
6
1
5
M
N
GND
L1
Precharge
Board
Gate Driver Board
+DC
-DC
To Gate
Driver X4
on the Slave
(Figure P.4)
Item Description
Six-Pulse, Full-Wave, 3-Phase SCR Bridge Rectifier Unit connected to the line input and DC
Bus output terminals through semi-conductor protection fuses with trip indicator switches.
Bus Supply Overtemperature Sensor located on the heat sink for thermal protection of the
SCR bridge rectifier.
RC snubber circuit routed to the three input phases through semi-conductor protection
fuses with trip indicator switches.
MOV snubber circuit routed to the three input phases.
Precharge Board
Enable Contactor (K1) for the precharge board.
Gate Driver Board. The DC power supply is connected to a customer-supplied 115V AC Power
Supply.
Cooling Blower connected to a customer-supplied 115V AC Power Supply. The customer’s
controls must, at a minimum, command the blower to run whenever contactor K1 is enabled.