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Surge and lightning arresters

Secondary (LV) arresters

Eaton’s Cooper Power series low-voltage distribution-class surge arresters provide surge protection to low voltage (175-650 VAC) indoor and outdoor applications. 

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Handles surges in LV circuits
Improved system reliability
First low-voltage distribution-class arrester
Protecting LV circuits
Indoor and outdoor applications
Multiple design options

Core features

  • VariSTAR Storm Trapper secondary class MOV surge arrester is designed to provide overvoltage protection for low voltage equipment and distribution circuits
  • Type L secondary arresters protect street-lighting controls, low-voltage relays, railroad-signal circuits and circuits used for fire alarms, remote metering and airport lighting
  • Protective gaps are auxiliary devices which serve to isolate electrical equipment during normal service conditions and provide a path to ground for surge current during arrester operations
  • Type S4 secondary arresters are designed to provide protection of low-voltage equipment, secondary distribution circuits, control circuits and signal circuits up to 650 Vac.
  • Indoor and outdoor industrial applications from 175 to 650 VAC
  • Meet all requirements for light duty distribution class arresters per IEEE Std C62.11 standard

Pioneering low-voltage, distribution-class arrester technology

The Storm Trapper H.E. arrester was the industry's first low-voltage distribution-class arrester, meeting requirements for light-duty distribution class arresters per IEEE Std C62.11 -1993 standard.

Reduced transformer failure rates

Years of research on low-voltage secondary circuits concluded that the types and magnitudes of surges possible in these circuits can be severe. The Storm Trapper H.E. arrester is designed to reliably handle these stresses, helping to reduce transformer failure rates when surge protection is added to transformer secondary bushings.
Specifications

Ratings

Type L

  • System Voltage: 120, 120/240, 120/240 volts Y
  • Rating: 175 volts*

 

Type S4

  • System Voltage: 240, 480, 600 volts
  • Rating: 650 volt*

 

Protective gap

  • System voltage: 2.4 kV∆, 6kV Rating*
  • System voltage: 4.16Y/2.4 kV, 11 kV Rating*
  • System voltage: 4.8 kV∆, 11 kV Rating*
  • System voltage: 8.32Y/2.4 kV, 15 kV Rating*
  • System voltage: 6.9 kV∆, 15 kV Rating*
  • System voltage: 12.47Y/7.2 kV, 15 kV Rating*
  • System voltage: 13.2 kV∆, 15 kV Rating*
  • System voltage: 14.4 kV∆, 15 kV Rating*

*An arrester rating represents the maximum line-to-ground voltage to which the arrester should be subjected. Since surge arresters are inherently sensitive to overvoltages, they should never be subjected to 60 Hz voltages above their rated voltage, even during momentary abnormal conditions. If such a condition is likely, a special system study may be necessary, and a higher rated arrester
may be required.

 

VariSTAR Storm Trapper secondary class MOV surge arrester

  • 175-Volt arresters: The 175-volt arrester is designed for single-phase 120-volt applications. It is available as single-, double-, or triple-pole for two-, three-, or four-wire systems.
  • 350-Volt arresters: The 350-volt single-pole arrester is designed for individual application at single voltage source installations with line-to-ground voltages greater than 175 volts and less than 350 volts. The 350-volt two-pole device is designed for common three-wire 480/240 volt applications. The 350-volt three-pole unit protects motors and other equipment on three-phase systems which can have a number of system voltages between 175 and 350 volts.
  • 650-Volt arresters: The 650-volt arrester is designed for commercial/industrial applications where the line-to-ground system voltage is greater than 350 volts, but not more than 650 volts
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New to surge and lightning arresters?

Learn about the fundamentals of surge arresters

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