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Surge and lightning arresters

Intermediate and station class arresters

Eaton's Cooper Power series polymer and porcelain-housed intermediate and station-class surge arresters feature enhancements in arrester design, including increased cantilever strength and improved energy handling capability.

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Increased cantilever strength
Improved performance
Enhanced design
Improved energy handling
Built to exacting specs
Reliable service

Core features

  • Meet or exceed the requirements of IEEE Std C62.11 standard or IEC 60099-4
  • The UltraSIL silicone rubber housing was selected for its superior insulation performance as compared to other polymeric housing materials. Long-term environmental testing has verified the lifetime performance advantage that silicone rubber provides
  • The hollow core design offers improved cantilever strength and directional venting
  • Moisture-impervious wrap
  • Optionally available with extra creepage for use in areas with extreme conditions of natural and man-made atmospheric pollution

Wide range with exacting specifications

Eaton's Cooper Power series arresters range from intermediate through station-class arresters up to 396 kV. The station arresters are built to exacting specifications and tested to IEEE or IEC requirements for years of reliable service

Designed for superior energy handling

The hollow core type arrester is built with extra-high, energy-rated disks, exceptional cantilever strength and directional venting.
Specifications

AZE ratings and characteristics

  Ratings
Arrester characteristic AZES
 AZEH
 AZEX
System application voltages
 3-345 kV
 3-230 kV
 3-138 kV
Arrester voltage ratings
 3-360 kV
 3-240 kV
 3-108 kV
Rated discharge energy, (kJ/kV of MCOV)
Arrester ratings
 3-108 kV
 3.4
 5.6
  
120-240 kV
 5.6
 8.9
 – 
259-360 kV
 8.9
 – 
 – 
System frequency
 50/60 Hz
 50-60 Hz
 50-60 Hz
Impulse classifying current
 10 kA
 10 kA
 10 kA
High current withstand
 100 kA
 100 kA
 100 kA
Pressure relief rating, kA rms sym
 Metal-top designs
 65 kA
 65 kA
 65 kA
Cubicle-mounted designs
 40 kA
 40 kA
 – 
Cantilever strength (in-lbs)*
 Metal-top designs duty-cycle ratings
3–48 kV
 90,000
 90,000
 90,000
54–109 kV
 120,000
 90,000
 120,000
120–240 kV
   120,000
 –
*Maximum working load should not exceed 40% of this value.
Note: Terminal load limit for cubicle-mounted designs should not exceed 100 pounds. Excessive loading could lead to a shortened arrester life.

UltraSIL (US, UH and UX) station-class ratings and characteristics

Arrester characteristic
 Rating
Arrester voltage ratings (kV)
 3-240
 
Cantilever strength (in-Ibs)
 Ultimate
 MDCLStatic**
US (3-108 kV)
 15,000
 6,000
UH (3-108 kV), US (120-240 kV)
 20,000
 8,000
UX (3-108 kV), UH (120–240 kV) 
 35,000
 14,000
 
Rated discharge energy (kJ/kV of MCOV)
 Single impulse rating
US (3-108 kV)
 3.9 
UH (3–108 kV), US (120–240 kV)
 6.2
UX (3–108 kV), UH (120–240 kV) 
 10
 
High current withstand* (kA) 
 100
Impulse classifying current (kA)
 10
Pressure relief rating (kA rms sym.)
 63
System frequency (Hz)
 50/60
* High current, short duration withstand (100 kA, 4/10 µs)
** Maximum design cantilever load – static or maximum working load is 40% of the ultimate

UXL high-strength arrester ratings and characteristics

Arrester characteristic
 Rating
Arrester voltage ratings (kV)
 3–360
Double impulse discharge energy rating
UXL (3–360 kV)
 15 kJ/kV of MCOV*
System frequency (Hz
 50/60
Impulse classifying current (kA)
 10
High current withstand** (kA)
 100
Pressure relief rating (kA rms sym.)
 63
 
Cantilever strength (in-Ibs)
 Ultimate
 MDCLStatic***
UXLB (3-360 kV)
 80,000
 32,000
UXLC (132-360 kV)
 92,000
 36,800
* Meets Class H energy levels per IEEE Std C62.11™-2012 standard
** High current, short duration withstand (100 kA, 4/10 µs)
*** Maximum design cantilever load – static or maximum working load is 40% of the ultimate.
Download Links
  • 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.
    (PDF 2 MB , 24/01/2023)
  • Eaton’s Cooper Power series product team works together with the engineering services team to provide a full storm response procedure to quickly ramp up operations in anticipation of storm impact for fast product shipment and remediation of damaged apparatus during storm recovery.
    (PDF 619 KB , 25/07/2019)
  • This brochure describes Eaton’s Cooper Power series UltraSIL UX arresters which are a cost-effective solution for sustained overvoltage conditions on underbuilt circuits.
    (PDF 140 KB , 30/11/2016)
  • This brochure describes Eaton’s Cooper Power series UltraSIL polymer-housed VariSTAR surge arresters which are an economical solution to prevent lightning damage.
    (PDF 447 KB , 12/11/2018)
  • This brochure describes Eaton’s Cooper Power series UltraSIL-housed Flexible Alternating Current Transmission System (FACTS) protector which is a special application surge arrester applied in FSC, SVC and HVDC systems.
    (PDF 107 KB , 31/12/2016)
  • This brochure describes how Eaton’s Cooper Power series VariSTAR high-strength station-class surge arrester design is an excellent choice when both high mechanical strength and excellent overvoltage protection are required. These arresters have been tested to meet and exceed the demanding requirements of IEC Std 60099-4: 2014.
    (PDF 808 KB , 01/07/2020)
  • This brochure describes how Eaton’s Cooper Power series VariSTAR high-strength station-class surge arrester design is an excellent choice when both high mechanical strength and excellent overvoltage protection are required. These arresters have been tested to meet and exceed the demanding requirements of IEEE Std C62.11-2012.
    (PDF 584 KB , 01/06/2020)
  • This brochure provides on overview of Eaton's Cooper Power series VariSTAR station-class arresters that have been tested to meet and exceed the demanding requirements of IEEE Std C62.11-2020.
    (PDF 604 KB , 21/09/2021)
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