S&C Instruction Sheet 663-500 7
Overview
The following instructions are for installation of S&C
Source-Transfer PMH Pad-Mounted Gear equipped with
the Micro-AT Source-Transfer Control. This switchgear is
a totally self-contained switching and protection package
providing fault protection and fully automatic two-way
source transfer for critical loads requiring a high degree
of service continuity. Source-Transfer PMH models that
include the S&C Micro-AT Source-Transfer Control provide
programmed control of all switching functions associated
with automatic source transfer.
Refer to S&C Instruction Sheet 663-503 for instructions
regarding operation of Source-Transfer PMH Pad- Mounted
Gear. For instructions about field programming and opera-
tion of the Micro-AT control, refer to S&C Instruction Sheet
515-500. These instruction sheets, along with a catalog
dimensional drawing showing cable-locating and anchor-
bolt dimensions, are included in the “Installation and
Operation Information Kit” provided with the switchgear.
Wiring diagrams for the switchgear and associated options
are also provided in the kit. All personnel involved with the
installation and operation of the equipment should be thor-
oughly familiar with the contents of the information kit.
The catalog number stamped on the nameplates affixed
to the outside of the doors of the pad-mounted gear is suf-
fixed with letter-number combinations. These suffixes
indicate the inclusion of options, such as key interlocks
(catalog number suffix “-C5”). Refer to Specification
Bulletin 663A-31 for a complete listing of the available
options for the switchgear.
