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Medium-voltage cable accessories

Elbow arresters

Eaton’s Cooper Power series elbow arresters provide shielded deadfront arrester protection with metal oxide varistor elbow and parking stand arresters used in pad-mounted, transformer and entry cabinets, vaults, switching enclosures and other installations. 

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600 A 35 kV class DirectConnect elbow arrester product aid Metal Oxide Varistor Elbow (M.O.V.E.) Surge Arrester
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Direct Connect 600 amp
50% reduced footprint
Extends cable life
Improved reliability
Overvoltage limitation
Equipment protection

Core features

  • The rubber body is constructed of high-quality precision-molded peroxidecured EPDM insulation and semi-conductive materials
  • The copper alloy probe and probe retainer are connected to the MOV block stack via welded flexible tin-plated copper leads. This ensures that the column cannot be damaged during installation and that a reliable current path to the MOV blocks is maintained
  • The disk column is composed of MOV disks bonded together with high-conductivity, silver-loaded epoxy to yield the most reliable electrical connection and eliminate air voids
  • The #4 AWG flexible copper ground lead, which reliably carries current to ground during voltage surges, is attached to the housing by a brass magneformed end cap
  • The brass end cap provides a tight, weatherproof seal

Reduced size and installation time

Watch this video to see how easy it is to install an elbow arrester.

Engineered to withstand harsh extremes

The POSI-BREAK M.O.V.E. surge arrester combines metal (zinc) oxide varistor technology in a pre-molded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device

Protection for improved system reliability

Elbow arresters are designed for use with standard interfaces to limit overvoltages to acceptable levels, protect equipment and extend cable life.

Reduced size and installation time

Eaton's Cooper Power series 600 A DirectConnect elbow arresters offer a cost-effective design with a shorter stacking height while reducing overall size 50 percent compared to traditional offerings and installation time by 80 percent.
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Commonly applied voltage ratings of M.O.V.E. and parking stand arresters

System voltage (V rms)
 Commonly applied arrester duty-cycle (MCOV) voltage rating (kV rms) on distribution systems
Nominal voltage
 Maximum voltage
 4-wire multigrounded neutral wye
 3-wire low impedance grounded
  Delta and 3-wire high impedance grounded
2400
 2540
 –
 –
 3 (2.55) 
4160 Y/2400
 4400 Y/2540
 3 (2.55)
 6 (5.1)
 6 (5.1) 
4260
 4400
 – 
 –
 6 (5.1) 
4800
 5080
 – 
 –
 6 (5.1) 
6900
 7260
 – 
 –
 9 (7.65)
8320 Y/4800
 8800 Y/5080
 6 (5.1)
 9 (7.65)
 –
12000 Y/6930
 12700 Y/7330
 9 (7.65)
 12 (10.2)
 –
12470 Y/7200
 13200 Y/7620
 9 (7.65) or 10 (8.4)
 15 (12.7)
 –
13200 Y/7620
 13970 Y/8070
 10 (8.4)
 15 (12.7)
 –
13800 Y/7970
 14520 Y/8388
 10 (8.4) and 12 (10.2)
 15 (12.7)
 –
13800
 14520
 –
 – 
 18 (15.3)
20780 Y/12000
 22000 Y/12700
 15 (12.7)
 21 (17.0)
 –
22860 Y/12000
 22000 Y/12700
 15 (12.7)
 21 (17.0)
 –
24940 Y/14400
 26400 Y/15240
 18 (15.3)
 27 (22.0)
 –
27600 Y/15935
 29255 Y/16890
 21 (17.0)
 –
 –
34500 Y/19920
 36510 Y/21080
 27 (22.0) or 30 (24.4)
 –
 –
46000 Y/26600
 48300 Y/28000
 36 (29.0)
 –
 –

M.O.V.E. and parking stand arrester protective characteristics

      Maximum discharge voltage (kV crest) 8/20 µs current wave
Duty cycle voltage rating (kV) 
 MCOV (kV) 
 Equivalent front-of-wave (kV crest)* 
 1.5 kA 
 3 kA
 5 kA
 10 kA
 20 kA
3 2.55 11 9 9.7 10.7 11.4 13
6 5.1 22 18.0 19.4 20.8 22.7 26
9 7.65 31.7 26 28 30 32.8 37.4
10 8.4 33 27 29.1 31.2 34.1 38.9
12 10.2 41.5 33.9 36.6 39.2 42.9 48.9
15 12.7 51.8 42.4 45.7 49 53.6 61.1
18 15.3 62.2 50.9 54.9 58.8 64.3 73.4
21 17.0 66 54.0 58.2 62.4 68.2 77.9
24 19.5 77 63.0 67.9 72.8 79.6 90.8
27 22.0 87.2 71.4 76.9 82.4 90.1 103
30 24.4 97.1 79.5 85.7 91.8 100.0 115.0
33 27 108 87.8 95.1 102 112 127
36 29 116 95.3 103 110 120 137
*Equivalent front-of-wave voltage is the expected discharge voltage of the arrester when tested with a 5 kA current surge cresting in 0.5 µs

M.O.V.E. DirectConnect elbow arrester electrical ratings and characteristics

      Maximum discharge voltage 8/20 µs current wave (kV crest)
Duty cycle voltage rating (kV)
 MCOV (kV)
 Front-of-wave protective level* (kV crest)
 1.5 kA
 3 kA
 5 kA
 10 kA
 20 kA
27
 22.0 105.0 75.0 82.0 87.4 96.2 110.0
30 24.4 112.0 79.5 85.7 91.8 100.0 115.0
33 27 108 87.8 95.1 102 112 127
36 29 116 95.3 103 110 120 137
*Equivalent front-of-wave voltage is the expected discharge voltage of the arrester when tested with a 5 kV current surge cresting in 0.5 µs
Download Links
  • 600 A 35 kV class DirectConnect elbow arrester product aid
    This brochure describes why Eaton’s Cooper Power series 600 A 35 kV class DirectConnect elbow arrester offers wind farm customers significant cost savings and ease of installation.
    (PDF 141 KB , 11/30/2016)
  • Commercial and industrial medium-voltage electrical distribution products brochure
    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 , 01/24/2023)
  • Storm season rapid response information
    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 , 07/25/2019)
  • 35 kV Class M.O.V.E. DirectConnect elbow arrester catalog
    This catalog describes features, benefits, and ordering information for Eaton's Cooper Power series M.O.V.E. DirectConnect elbow arrester which combines metal (zinc) oxide varistor technology in a premolded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device.
    (PDF 850 KB , 03/28/2019)
  • 600 A 35 kV metal oxide varistor (MOV) DirectConnect elbow arrester
    Catalog data for Eaton’s Cooper PowerE series DirectConnectE elbow arrester combines metal oxide varistor (MOV) technology in a pre-molded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device.
    (PDF 883 KB , 12/29/2022)
  • Metal oxide varistor (MOV) parking stand surge arrester catalog
    This catalog describes features and ordering information for Eaton's Cooper Power series parking stand arrester which combines metal (zinc) oxide varistor technology with a premolded rubber insulated standoff bushing.
    (PDF 229 KB , 11/30/2015)
  • Metal Oxide Varistor elbow (M.O.V.E.) surge arrester catalog
    This catalog describes features and ordering information for Eaton’s Cooper Power series metal oxide varistor elbow (M.O.V.E.) surge arrester which combines metal (zinc) oxide varistor technology in a premolded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device.
    (PDF 160 KB , 05/31/2017)
  • POSI-BREAK Metal Oxide Varistor Elbow (M.O.V.E.) surge arrester catalog
    This catalog describes features and ordering information for Eaton’s Cooper Power series POSI-BREAK M.O.V.E. surge arrester which combines metal (zinc) oxide varistor technology in a premolded rubber elbow to provide overvoltage system protection in an insulated, fully shielded, submersible, deadfront device.
    (PDF 152 KB , 05/31/2017)
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