Connections For 120/240 Vac System With Cts - GE PACSystems RX3i User Manual

Connections for 120/240 VAC system with CTs

GFK-2749
The connections shown below detail the installation for a typical North American 120/240
volt AC three-wire single phase connection. The neutral is connected to a ground point,
usually at the main power distribution panel.
Mandatory equipment includes CT shorting blocks and protection fuses for the voltages.
These will allow replacement of the PSM Terminal Assembly with the system still
energized.
The following procedure should be performed only by qualified
field personnel.
To replace the Terminal Assembly, the Va, COM and Vb fuses are first removed and the
CTs shorted. Then the connections on the Terminal Assembly can be removed safely and
the module replaced.
The PSM module can be replaced simply by powering off the host controller and replacing
the module, or by hot-swapping the module when the field conditions are safe to do so.
The IC694CBL200 cables can be disconnected from either the PSM module or the
terminal assembly when the host controller is powered off. This can be done without
disturbing the wiring field wiring on the Terminal Assembly.
L1 N
CT
s
Load
Chapter 2 Installation
Warning
L2
PT
1A Fuses
s
CT Shorting
Block
Va
Vb
COM
Frame
Ground
Ia+
Ia-
Ib+
Ib-
Frame
Ground
2
2-13