Rockwell Automation 7703E Medium Voltage SMC OEM Components - 10-15 kV - Manual (Page 25)

Rockwell Automation Publication 7703E-IN001E-EN-P - July 2014 25
PowerBrick™ Installation Chapter 3
A sensing CT is supplied to monitor the current in the loop. It provides a signal
to the Interface Board to inform the SMC Flex control module that the power
supply is operating. If the current loop is not operating, option stop maneuvers
will be inhibited. An Alarm will be generated in the SMC Flex control module if
the signal is lost after control power has been applied. If control power is applied
without the signal, the controller will not provide option stop maneuvers until
the module is powered up with the signal present.
Figure 11 - Typical 12 kV Implementation for Current Loop
To
control
power
1. Power Supply
2. Current Transformer Assembly
3. Loop Cable
4. Terminal
5. Return Cable #6 AWG (13 mm²) The total length of the three loop
cables and the return cable must be
50 feet ± 8 in.
(152. m ± 20 cm).
PowerBrick
assemblies
NOTE: