Siemens SMP Switchboards User Manual
SMP Switchboards
Selection and application guide
www.siemens.ca/powerdistribution
Switchboards
Contents
Sentron SMP Switchboards
Type SMP
Construction Details Features 2
Features 3
Specification 8
Sentron® SMP Switchboards
Construction Details
Simplified system design.
A typical SMP switchboard consist of
a floor mounted, wall supported service section, and a distribution section.
The wireway can also be added where
required by the local utility or if additional cable termination space is required.
Wireways are modular to allow
flexibility.
The wireway is available in 2 depths to
suit customer needs. Wireway has split
front doors as standard with optional
hinged doors. The lug pads are standard
NEMA hole pattern and accept up to 5
mechanical lugs or 6 compression lugs.
90oC rated wireway.
The termination temperature for main
incoming cables can be sized at 90oC
for bussed pull sections.
Service Entrance Sections house a
variety of equipment.
b
Service Entrance Sections.
Service sections can be fed directly from
overhead by cable.
Service entrance sections equipped
for bottom feed will accept cable from
underground directly into the service
section.
b
Utility Metering
In addition to the main device, the
service section contains utility metering
provisions. “Cold” metering provisions
(CT’s on the load side of the main
device) are furnished. The CT’s are
provided by the utility company. The
compartment will be built to utility
company standards, with hinged doors
and provisions for utility metering
equipment.
Distribution Sections have ample
wiring room and front accessibility.
Generous top or bottom gutters have
been created by locating the bus-link in
the top or bottom of the distribution
section, so there’s ample room to run
cables into the distribution section and
make connections.
Standard bolted covers allow complete
access to load conductors. Future
flexibility comes standard in the
Siemens SMP switchboard. The
distribution section can accommodate
any combination of panel mounted
devices, including MCCBs and fusible
disconnect switches.
Operating temperatures are in
accordance with CSA Standards
Bus bars are available in standard
tin-finished aluminum or optional
silver-finished copper. Standard bus is
sized on the basis of heat rise criteria,
in accordance with CSA C22.2 #31. All
bus bars are sized to limit heat rise to
65°C above an ambient temperature of
40°C.
Construction
Bus-Link Connections are accessible
from the front.
The Bus-Link can be bolted from the
front of the switchboard. Each bus-link
is attached by grade five bolts to assure
solid joints between sections, and to
maintain full bus ampacity through the
joint.
To make installation and servicing of the
bus-link easier, all phase and neutral
busses are stacked one above the other.
Cable Terminals
Screw mechanical connectors (lugs) are
provided as standard equipment.
b
User Metering
The service section provides space for
the Siemens Digital Meter with remote
display, and it’s associated components.
b
Main protective device
The MCCB is mounted individually
so that it can be located quickly in an
emergency. SMP switchboards will
accommodate different types of main
circuit breakers. Selection depends on
the characteristics of your individual
electrical system.
2
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