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Reclosers

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.

Compact, lighter unit
Reduced installation time
Proven NOVA recloser technology
Reduced maintenance costs
Three operating modes
Operation flexibility

Core features

  • Lower installation and maintenance costs
  • Lower operating costs
  • 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

Easy operation

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.
Specifications

Standards

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

Ratings

  15 kV
15 kV
27 kV
27 kV
38 kV
Maximum voltage
15.5 kV 15.5 kV
27.0 kV
27.0 kV
38.0 kV
Rated basic impulse level
110.0 kV 125.0 kV
125.0 kV
150.0 kV
170.0 kV
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
50 kV
50 kV
60 kV
60 kV
70 kV
Power frequency withstand, wet
45 kV
45 kV
50 kV
50 kV
60 kV
Rated continuous current
630 A*
630 A*
630 A*
630 A*
630 A*
Short circuit current, symmetrical
 12.5 kA**
12.5 kA**
12.5 kA**
12.5 kA**
 12.5 kA
Making current, asymmetrical Peak
32.0 kA
32.0 kA
32.0 kA
32.0 kA
32.0 kA
Making current, asymmetrical rms
20.0 kA
20.0 kA
20.0 kA
20.0 kA
20.0 kA
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)

Duty cycle

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
15-20 4 88 44
45-55 8 112 56
90-100 17* 32 16
    Total 232 Total 116
*Value shown for 60 Hz      

Options

  • 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)
  • Factory assembly
  • Arrester-mounting brackets
  • Transformer mounting brackets for oil or dry PTs
  • Internal voltage sensing
  • Wildlife guards
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