Input Power Configuration - Allen-Bradley 8720MC-RPS065 User Manual

Input Power Configuration

Phase Ground
The 8720MC-RPS units are designed to operate in grounded WYE
environments.
The grounded (WYE) power configuration lets you ground your three-phase
power at a neutral point. This type of grounded power configuration is
required.
Figure 19 - Grounded Power Configuration (WYE Secondary)
Transformer (WYE) Secondary
Transformer
Three-phase
Input VAC
Power Distribution Ground
Refer to Typical Input Power Diagrams
interconnect diagrams.
Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
L1
AC Line Filter,
Circuit Protection Devices,
L2
Varistor/Harmonic Filter,
Magnetic Contactor,
and Line Reactor
L3
Connect to 8720MC-RPS
Bonded Cabinet
ground stud.
Ground
Ground Grid or
ATTENTION: Ungrounded systems do not reference each phase potential to
a power distribution ground. This can result in an unknown potential to earth
ground.
Connect the 8720MC-RPS Unit
L1
L2
L3
P
N
8720MC-RPS Unit
(8720MC-RPS065 unit
is shown)
beginning on page 49 for input power
Chapter 5
43