Rockwell Automation 1426 PowerMonitor 5000 Unit - Manual (Page 20)

20 Rockwell Automation Publication 1426-UM001F-EN-P - November 2013
Chapter 2 Install the PowerMonitor 5000 Unit
Grounding
This product is intended to be mounted to a well-grounded mounting surface,
such as a metal panel. The upper mounting slots are equipped with protective
conductor terminals, which must must make metal-to-metal contact with the
mounting panel. In solid-state systems, grounding helps limit the effects of noise
due to electromagnetic interference (EMI).
Connect a 2.5 mm
2
(14 AWG) wire from the GND terminal of the
PowerMonitor 5000 unit to the ground bus or other low-impedance earth
ground prior to connecting the control power or any other connections.
You must ground voltage and current sensing circuits to limit the maximum
voltage to ground for safety. Ground CT secondary circuits at either the CT or
the shorting terminal block. All grounds must be made to a common ground bus
or terminal.
Refer to the Industrial Automation Wiring and Grounding Guidelines,
publication
1770-4.1 , for additional information.
Wiring Accessory Kit
The power monitor accessory kit simplifies the installation of a
PowerMonitor 5000 unit by making all the required installation accessories
available in one catalog number, 1400-PM-ACC. The accessory kit includes
three, 10 A fuses and blocks for protecting voltage sensing wiring, a 1 A fuse and
block for control wiring protection, and an 8-pole shorting terminal block for
CT wiring. Please contact your local Rockwell Automation representative for
more information.
Voltage and Current Sensing Connections
The PowerMonitor 5000 unit is capable of monitoring a variety of three-phase
and split-phase circuits. The voltage sensing connections, current sensing wiring,
and metering mode need to be selected to match the configuration of the circuit
being monitored.
Table 5 provides a key to selecting the proper wiring diagrams and metering
modes.