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NOVA™ STS Single-Tank, Triple-Single, Electronically Controlled Recloser
INSTALLATION AND OPERATION INSTRUCTIONS
MN280046EN May 2016
Accessories
Auxiliary switch
A single-stage auxiliary switch can be provided as an
accessory on each phase of the recloser. Each switch
consists of two independent contacts that permit any
desired combination of “a” and “b” contacts, allowing for
remote monitoring of the recloser.
The switch contacts are insulated for 600 V and have a
continuous current rating of 10 A. Their interrupting ratings
are shown in Table 11.
Table 11 . Auxiliary Switch Interrupting Ratings
Volts
Inductive
AC (A)
Non-
Inductive
AC (A)
Inductive
DC (A)
Non-
Inductive
DC (A)
24
–
–
15.0
20.0
48
–
–
7.5
10.0
120
60
80
–
–
125
–
–
1.5
2.0
240
30
60
–
–
250
–
–
0.45
0.5
Table 12 . Auxiliary Switch Pin Contacts and Cable Wire
Colors
Recloser Phase* Contact Type** Wire Color*** Receptacle Pin
A-phase
a
black
white
A
B
A-phase
b
red
green
C
C
B-phase
a
orange
blue
E
F
B-phase
b
white/black
red/black
G
H
C-phase
a
green/black
orange/black
J
K
C-phase
b
blue/black
black/white
L
M
unused
unused
unused
N, P
* See Figure 6. 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.
** The “a” contacts are normally open; “b” contacts are normally closed.
*** The wire color of the factory-supplied cable accessory.
Terminal options
The NOVA STS recloser 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, flat-pad, and stud 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 or stud
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.
