Rockwell Automation 825-P Modular Protection System for Motors User Manual - Manual (Page 25)

Rockwell Automation Publication 825-UM004D-EN-P - November 2012 25
Installation Chapter 2
Voltage Connections
With the Voltage Inputs option, the three-phase voltages can be directly
connected for voltages under 300V
L-L
, wye-wye VT connected or open-delta
VT connected. Figure 12 shows the three methods of connecting three-phase
voltages.
Figure 12 - Voltage Connections
The recommended fuse is the Bussman KTK - 1/10, 1/10 ampere Limitron® fuse,
or its equivalent.
N
L1
L2
L3
N
Wye-Wye VT Connection (Xfmr Connection = Wye)
825-P
F1
F2
F3
L1 L2 L3
L1 L2 L3
825-P
L1
L2
L3
N
Direct Connection (Xfmr Connection = Wye)
F1
F2
F3
F1, F2, and F3 are fuses.
L1
L2
L3
L1 L2 L3
Open-Delta VT Connection (Xfmr Connection = Delta)
825-P
F1
F3