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NOVA STS single-tank triple-single recloser
Eaton's Cooper Power series NOVA STS single-tank triple-single recloser consists of three single-phase recloser units in one tank. Each consists of an interrupting module, with embedded CT and mechanism. The interrupter modules utilize outdoor cycloaliphatic-epoxy-encapsulated vacuum interrupters. Suitable for pole or substation mounting, the NOVA STS recloser provides automation of distribution feeders in line applications. The three NOVA STS recloser units are controlled by a single Form 6 recloser control, on a per-phase basis for both source and load that can be programmed for three operating modes.
Improve MAIFI reliability up to 62% for single-phase trip/three-phase lockout performance
Improve SAIFI reliability up to 32% for single-phase to ground, line-to-line, and three-phase faults by changing three-phase mode of operation to single-phase mode of operation
More compact, lighter unit takes less space on the pole
The Form 6-TS control front panel allows the user to open and close any phase independently without any menu navigation. Each phase of the NOVA STS recloser has a dedicated manual trip lever for quick, on-the-spot, single-phase tripping.
Reduce system costs and improve system reliability
Eaton's Cooper Power series NOVA STS recloser can be programmed to isolate faults on an individual phase basis, even in multiple-fault scenarios. For example, load-side fuse protection is maintained even if two faults occur on different phases prior to resetting the control.
Eaton's Cooper Power series reclosers are designed and tested in accordance with the following ANSI standards: C37.60 and C37.85 and ANSI Guide C37.61
Rated basic impulse level
Radio noise limit (µv)
100 @ 9.4 kV
100 @ 9.4 kV
100 @ 16.4 kV
100 @ 16.4 kV
100 @ 23.0 kV
Power frequency withstand, dry
Power frequency withstand, wet
Rated continuous current
Short circuit current, symmetrical
Making current, asymmetrical Peak
Making current, asymmetrical rms
Minimum mechanical/electrical operations without maintenance (C-O) 10,000
* 800 A accessory is also available
** 16.0 kA option is also available (making current is 41.0 kA asymmetrical Peak and 25.0 kA asymmetrical rms)
Percent maximum circuit interrupting rating
Minimum X/R ratio
Number of unit operations at 12.5 kA
Number of unit operations at 16.0 kA
*Value shown for 60 Hz
Single-stage auxiliary switch
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)
This brochure outlines Eaton’s Cooper Power series broad commercial and industrial medium-voltage transformer, switchgear, fuse, sectionalizer, switch, regulator, tool, OEM equipment, cable accessory, lightning arrester, power capacitor and recloser offerings.
This catalog describes the general ratings and ordering information for Eaton’s Cooper Power series reclosers which are self-contained devices with the necessary intelligence to sense overcurrents to time and interrupt fault currents and to re-energize the line by reclosing automatically.
This document compares the ratings and standards of reclosers and breakers to aid in the evaluation and application of automatic circuit reclosers and high-voltage circuit breakers that provide alternate means for distribution circuit protection.
This advisory affects Eaton's Cooper Power series Form 6 Triple Single (TS) recloser controls operating in the 3-phase Trip, 3-phase LO (Ganged Mode) triple-single operation mode with the following versions of installed firmware: ProView 4.0.1, ProView 5.0.
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Eaton is a power management company with 2018 sales of $21.6 billion. We provide energy-efficient solutions that help our customers effectively manage electrical, hydraulic and mechanical power more efficiently, safely and sustainably. Eaton is dedicated to improving the quality of life and the environment through the use of power management technologies and services. Eaton has approximately 101,000 employees and sells products to customers in more than 175 countries.