Cut Sheet

39
Technical Data TD01701001E
Effective March 2017
UL low-voltage busway
Pow-R-Way III
EATON www.eaton.com
Plug-in protective devices
All Pow-R-Way III plug-in units are designed with the safety of the
installer and user as the key criteria. The following features are
standard for both fusible and circuit breaker type plug-in units:
Pow-R-Way III bus plugs have extended ground and neutral bars,
which bring the termination points down into the cable entry area
making for a safer, easier connection.
A barrier is provided over the line side connections from the bus
plug stab assembly to the fusible switch or circuit breaker.
The bus plug ground stab makes positive contact with the busway
ground (integral or internal) before the phase or neutral stabs contact
the bus bars.
A bus plug guide port is provided in the busway housing, to the right
of each plug-in outlet. A polarizing alignment pin is located at the
line side end of each bus plug enclosure. The alignment pin must be
inserted into the guide port for proper installation. The plug-in unit
and the busway are interlocked to ensure that the device is in the
OFF position prior to installation or removal of the unit.
To ensure that the bus plug is seated onto the busway, the clamping
mechanism will draw the unit tight onto the busway housing as the
installer tightens the clamps.
Plug-in units have an interference bracket that prevents the cover
from being opened while the device is in the ON position and to
prevent accidental closing of the device while the cover is open.
There are two locations available for field positioning of the bus plug
operating handle for all circuit breaker bus plugs and fusible plugs
over 400 A and higher. On vertical bus run applications, the handle
can be mounted on the side of the plug, and for horizontal runs,
the handle can be mounted on the (line side) end of the unit. Bus
plugs are shipped with the handle mounted on the end as standard.
Mounting positions are illustrated in Figure 60.
When a plug-in unit is installed, the bus plug stab base assembly
engages a seating ridge provided on the plug-in outlet. The stab
base is drawn in to overlap the ridge and to form a tight seal against
moisture and dust.
Figure 58. Plug-in stab details
Figure 59. Plug-in outlet details
Plug-in device mounting
The load end of a plug-in unit varies with the orientation of
the busway as determined by the “F” and “T” markings
(see Figure 60 below).
Figure 60. Plug-in device mounting
OF
O
F
ON
O
F
DANG
Guide Pin
and Port
Clam
p
and Guid
e
O
F
F
ON
Fin
g
er-Saf
e
B
a
rri
e
r
s
T
F
G
r
ou
n
d
Stab
Gu
i
de
P
o
r
t
Outlet Seatin
g
Rid
ge
Mountin
g
Hardwar
e
ON
O
F
F
H
a
n
d
l
e
Loa
d
L
oad
H
a
n
d
l
e
ON
O
F
F
L
oad
H
a
n
d
l
e
ON
O
F
F
L
oad
H
a
n
d
l
e
ON
O
F
F
ON
O
F
F
L
oad
H
a
n
d
l
e
ON
O
F
F
ON
O
F
F
ON
OF
F
L
oad
L
oad
L
oad
H
a
n
d
l
e
H
a
n
d
l
e
Handl
e
T
F
T
F
T
T
F
F
T
F
F