Eaton Cooper Power NOVA NX-STS, Installation And Operation Instruction Manual

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15
Accessories
INSTALLATION AND OPERATION INSTRUCTIONS
MN280103EN March 2023 www.eaton.com
Accessories
Auxiliary switch
A single-stage auxiliary switch can be provided as an
accessory. The auxiliary switch has two independent
contacts: a single “a” contact (follows state of recloser
contacts) and a single “b” contact (opposite recloser
contacts). This accessory allows for remote monitoring
of the recloser.
The switch contacts are insulated for 250 Vac and have a
continuous current rating of 5 A. The interrupting ratings are
shown in Table 6 .
Table 6 . Auxiliary switch ratings
Volts Amperes
Up to 30 Vdc 5 A
Up to 250 Vac 5 A
Minimum applicable load 0.16 A at 5.0 Vdc
Table 7 . Auxiliary switch pin contacts and
cable wire colors
Recloser
phase
a
Contact
type
b
Wire
color
c
Pin
A-phase a Black A
Red C
A-phase b White B
Red C
B-phase a Green D
Blue F
B-phase b Orange E
Blue F
C-phase a White/black G
Green/black J
C-phase b Red/black H
Green/black J
Unused Unused Unused K, L, M, N, P
a
See Figure 9 . A-phase is designated as terminals 1 and 2. B-phase is
designated as terminals 3 and 4. C-phase is designated as terminals 5
and 6.
b
The “a” contacts are normally open; “b” contacts are normally closed.
c
The wire color of the factory supplied cable accessory.
Terminal options
NOVA NX-STS reclosers can be specified with eyebolt
terminals (630 A and 800 A), two-hole (630 A) or four-hole
(800 A) flat-pad terminals, or stud-type terminals (800 A).
The eyebolt and flat-pad terminals are made of copper
alloys. Eaton recommends terminal connection to copper
wires to optimize the electrical connection. Aluminum
cables may produce aluminum oxide sufficient to
compromise the electrical connections.
Anti-oxide coatings for temporary protection of wire-
brushed, aluminum cable connections to flat-pad
terminals must be maintained at intervals determined by
the customer based on load current, climate, and other
installation conditions.
Eyebolt terminals are recommended for copper
conductors only.
Mounting hanger
Pole-mounting accessory
One pole-mounting hanger, which allows a variety of add-on
components to be mounted such as arresters and PTs (dry
or oil type), is available for pole-mount installations for wood
or concrete poles. Refer to
Figure 2
for a representation of
this bracket.
Arrester mounting brackets
The NOVA NX-STS recloser has available a source side
arrester mounting bracket (mounts in front of the recloser)
and a load-side bracket (mounts behind the recloser) for use
with the pole-mounting hanger. Each arrester bracket has
three mounting locations for factory or customer-supplied
arresters. The arrester brackets can be factory or field
installed. If installed at the factory, optional arresters
can be factory installed with phase and/or ground wiring.
See
Figure 3
for arrester bracket locations on the pole-
mounting hanger.
Wildlife protection accessory
Wildlife guarding is an optional accessory that can
be ordered for the NOVA NX-STS recloser for wildlife
protection. Due to its unique vented design, it allows water
to easily drain through the wildlife guard and ample visibility
to the terminal connection housed within the wildlife guard.
The wildlife guard uses a positive latching system to secure
the wildlife guard securely to the recloser shed.
The wildlife guard is designed to secure itself around
the first major skirt of the vertical and horizontal recloser
bushing. If the load-side voltage sensor accessory is
installed, the wildlife guard shall have a notch to allow
the load-side sensor to safely extend into the guard for
connection to the recloser top terminal.
Improper installation of the wildlife guard may affect voltage
sensing accuracy of the load-side voltage sensor. During
inspection, ensure there are no trapped contaminants within
the guard that may affect the load-side sensor connection.
See
Figure 13
that showcases the wildlife guard installed
on an example site-ready recloser.
Figure 14
and
Figure 15
show how the wildlife guard for the load-side voltage sensor
is installed. The same process applies when installing the
horizontal wildlife guard on the first major shed nearest to
the horizontal recloser terminal.