Contents
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3D-73p bypass switch � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �2
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Ordering information � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � �6
Switches
Catalog Data
CA008010EN
Effective February 2018
New issue
COOPER POWER
SERIES
3D-73P three-phase
bypass switch
3D-73P disconnect switch
Eaton is now offering three of its D-73P polymer distribution-
class disconnect switches pre- mounted on a fiberglass
crossarm. Pre-mounting three switches on a shared cross arm
allows for increased ease of installation, offering an economical
way to bypass equipment in need of maintenance without
service interruption while reducing a lineman's time in the field
and decreasing labor costs.
Eaton's Cooper Power series 3D-73P offers a reliable solution
for isolating equipment on distribution circuits up to 38 kV. These
switches are quality constructed to ensure stable high current
capability and full thermal capacity under the required duties of
today’s load and short circuit conditions.
Application
The 3D-73P three phase bypass switch incorporates the
advanced design features of three D-73P hook-stick operated,
single - phase bypass switches mounted on a single fiberglass
crossarm to create an easy to install three-phase, switch.
The 3D-73P is available in voltage ratings of 15kV(110kV BIL),
27 (125 or 150kV BIL) and 38kV(150kVBIL) with a 600A or 900A
continuous current rating. There are several additional options
available allowing the switch to be configured to meet specific
application needs.
Features and detailed description
Parallel groove clamp: Two-bolt tinned
bronze clamp secured with two galvanized
steel bolts. Conductor range: #6 solid to
397.5 MCM ASCR, 500 MCM Copper or
556 MCM Aluminum.
Single point lift: Single-point, center of
gravity lifting bracket available for ease of
installation,
4-Hole terminal pad: NEMA four hole
terminal pad. Capable of accepting wide
selection of connectors. See Table 1 for
standard offering. 600 A ratings have
tin-plated pads to accommodate either
bronze or aluminum terminals. 900 A
switch has silver plated contacts.
90 Degree Stop Pin: Pin included
as standard option to provide
blade opening stop at 90 degrees
Pin able to be removed in field for
180° opening.
Insulators: Light weight UltraSIL
silicone rubber polymer, 2.25 B.C.
available in 110, 125, and 150V BIL
Loadbreak Hooks (Standard):
Galvanized steel hooks to be used
with portable loadbreak tool.
Contacts: High pressure line type,
both clip and hinge ends.
Blade Design: Silver--plated
copper in truss-type construction
with cross braces in front and back
of contacts provides secure force
on contacts, as well as, superior
rigidity, thus minimizing side
deflection and maintaining positive
alignment when closing the
switch. The blade and latch design
provides for positive latch.
Terminal Pad: NEMA
®
two hole
terminal pad. Capable of accepting
wide selection of connectors. 600
A ratings have tin-plated pad to
accommodate either bronze or
aluminum terminals. 900 A switch
has silver plated contacts.
Figure 1�
2
Catalog Data CA008010EN
Effective February 2018
3D-73P three-phase
bypass switch
www.eaton.com/cooperpowerseries