Speedfax 2017

Power Mod
Revised on 06/30/19
Applications: Bus Duct Connections
3
METER
CENTERS
Busway application
Siemens Power Mod offers an efficient and standardized
means of connecting Sentron Busway to Power Mod
utilizing the TapStack module. This module connects to a
joint in the busway and converts the bus structure over to
that of the Power Mod horizontal bus in only nine inches.
TapStacks are configured, priced, built, and shipped
with the Sentron Busway. They require an additional
QuickConnect coupler and are for indoor use on end-feed
applications. TapStacks can connect to any Power Mod
horizontal bus.
Options for the user are:
1. Direct Connection: in this option (below) the connection
is made directly to any meter stack family. This
application is for use when the service disconnect is
located at the beginning of the busway.
2. Connection to a service disconnect: in this option a
connection is made to either a WXB cross bus main
or a WXS switch main. Please note that ANY other
mains (WB, WEB, WS, WES) cannot act as a service
disconnect for downstream meter stacks. The WB,
WEB, WS, WES mains CAN be used as tenant mains
on the load-side of a service disconnect for use in
feeding large remote loads such as a CT cabinet. WXB
mains are available up to 1200amps and WXS mains are
available up to 800amps. Both families have 100K AIC
options for all models.
3. Connection to a load-side main: In applications where
branch circuit monitoring is used in lieu of Power Mod a
tap stack plus Power Mod main (WB, WS) can be used
where the installer cables out of the main over to a
distribution panel (Siemens P3, P4, and P5 panel types).
This essentially replaces a bus plug function.
For Center feed bus duct application please contact your
Siemens representative.
Critical and recommended dimensions for
Sentron Busway to Power Mod connections
Tap Stack Module
Warning
Do not connect the Power Mod NEMA 1 corner
units (BE) directly to busway; always use a WELB in
its place or use another module as an intermediary
between the two.
3-12
Siemens Industry, Inc. SPEEDFAX Product Catalog