GE Industrial Solutions GPS4827 - Manual (Page 21)

Galaxy Power System GPS4827
19
5 AC Input Panels
Overview
AC Service
The ac input panel provides the facility to terminate 3-phase ac service to the GPS 4827
system or to distribute individual 1-phase ac supplies to each rectifier position. Depending
upon the option ordered, the panel will connect 3-wire (three phases), 4-wire (three phases +
neutral), or individual 2-wire (single phase, either 2 hot leads or 1 hot lead and neutral) input
ac service.
Some options provide circuit breakers to protect the conductors providing ac service to the
individual rectifiers. Other options provide a terminal strip and the conductors are protected
by circuit breakers located in the building’s ac service panel.
Note: See AC input table in the Specification section for recommended conduit size, wire size
and protector size based on the National Electric Code.
Figure 5-1: AC Input terminal strip panel
Figure 5-2: AC block.
Factory wiring from AC block to rectifier shelf shown.