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Reclosers

NOVA three-phase recloser

Eaton's Cooper Power series NOVA recloser is a three-phase, vacuum-interrupting recloser that successfully combines four patented technologies: cycloaliphatic-epoxy encapsulation, high-performance vacuum interrupter, dependable lower power mechanism and an automated microprocessor recloser control. The solid polymer insulation is highly resistant to ozone, moisture, contamination, ultra-violet light and tracking. The axial-magnetic contacts are ideal for encapsulation and the dual-coil actuator provides for years of rugged performance. 

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NOVA three-phase recloser catalog Recloser general ratings information catalog
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Compact and lightweight
Easily installed on poles or in substations
Accessories to tailor protection
Maximum system operating flexibility
Magnetic actuator
Trouble-free operation

Core features

  • Reliable, economical overcurrent protection, advanced metering, and automation systems for distribution circuits rated through 34.5 kV
  • Combines solid cycloaliphatic-epoxy polymer-encapsulated vacuum interrupters with a reliable, lightweight operating mechanism that utilizes a magnetic actuator to provide a lifetime of trouble-free operation
  • Solid polymer system does not rely on a gaseous, liquid or foam dielectric
  • Highly resistant to ozone, oxygen, moisture, contamination and ultraviolet light
  • Available with two configuration options: control-powered interface and auxiliary-powered interface
  • Designed and tested to be compatible with Eaton’s Cooper Power series three-phase recloser controls
  • Compact and lightweight; easily installed on poles or in substations, mounting equipment is available
  • Recloser and control accessories enable further tailoring of the protective program to achieve maximum system operating flexibility

Maintenance-free, environmentally safe operation

Eaton's Cooper Power series cycloaliphatic-epoxy polymer encapsulation provides solid insulation. There is no monitoring or maintaining of gas pressure or oil levels; there are no toxic or environmentally unfriendly materials. There are no foam fillers or insulation seals, eliminating potential moisture ingress areas. The NOVA recloser module exhibits good absorption of elastic energy and resistance to cracking and crack propagation. Additionally, durable environmental properties make the solid polymer suitable for outdoor applications, including seacoasts, deserts, and areas of high pollution.

Hydrophobicity

Eaton's Cooper Power series NOVA three-phase recloser module maintains excellent hydrophobicity, a property characterized by water beading into isolated drops, and is highly resistant to moisture absorption. Hydrophobicity prevents continuous sheets of water from forming leakage current paths that deteriorate the creepage withstand level.

Fast, low-energy arc interruption with long contact and interrupter life, low mechanical stress and maximum operating safety

With arc interruption taking place in a vacuum, contact and interrupter life are several times greater than with interruption in oil, virtually eliminating interrupter maintenance. Vacuum interrupter contacts are manufactured with chromium and copper to obtain mechanical and electrical characteristics needed for the contacts.

Looking for a pad-mounted NOVA recloser?

Eaton's pad-mounted electronically controlled, enclosed NOVA recloser features solid-dielectric vacuum interruption in a mild steel enclosure design, safeguarding against weather, tampering and rodents.

Learn more
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
 29.2 kV
 29.2 kV
 38.0 kV
Rated Basic Impulse Level (BIL)
 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
 31.0 kA
 31.0 kA
 31.0 kA
 31.0 kA
 31.0 kA
Cable charging current
 10 A
 10 A
 25 A
 25 A
 40 A
Minimum mechanical/electrical operations without maintenance (C-O)          10,000
* 800 amp accessory is also available
** 16.0 kA option is also available (Making Current is 40.0 kA Asymmetrical Peak)

Duty cycle

Percentage of interrupting rating Number of units operations Minimum circuit X/R value
15-20 88 4
45-55 112 8
90-100 32 15
  Total 232  

Auxiliary switch interrupting ratings

Volts Inductive AC (amps) Non-inductive AC (amps) Inductive DC (amps) Non-inductive DC (amps)
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

Options

  • Internal voltage sensing
  • Mounting equipment
    • Single pole-mounting hanger with stainless steel hardware 
    • Single concrete-pole-mounting hanger with stainless steel hardware 
    • Surge arrester-mounting brackets with stainless steel hardware: Inboard and/or Outboard
    • Alley pole-mounting hanger with stainless steel hardware
    • Arrester brackets (set of 3 or 6) 
    • Substation-mounting frame with stainless steel hardware
    • Field kit for NOVA recloser on substation-mounting frame
  • Factory assembly or site-ready
    • Recloser in single pole-mounting hanger (with or without arrester brackets, arresters and/or potential transformers) 
    • Recloser on alley-pole-mounting hanger (with or without arrester brackets, arresters and/or potential transformers)
  • Auxiliary switch
    • Three-stage auxiliary switch with six independent contacts and receptacle
    • Auxiliary switch cable for auxiliary switch to control
    • Auxiliary switch cable 
  • Miscellaneous accessories
    • Low-voltage AC input cable
    • Source and load wildlife guards, 630 A recloser (set of 6) 
    • Source and load wildlife guards, 800 A recloser (set of 6) 
Download Links
  • NOVA three-phase recloser catalog
    This catalog describes ratings and ordering information for Eaton’s Cooper Power series NOVA three-phase electronically controlled, vacuum-interrupting automatic circuit reclosers which provide reliable, economical overcurrent protection, advanced metering and automation systems for distribution circuits rated through 34.5 kV.
    (PDF 939 KB , 01/03/2015)
  • Recloser general ratings information catalog
    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.
    (PDF 375 KB , 01/01/2016)
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