Reliability under the most extreme weather conditions
SHIELD7
We take pride in designing and manufacturing high-performance power protection solutions for the North American market. For over 25 years, our Montreal, QC-based team has developed a comprehensive lineup of rugged, reliable equipment engineered to withstand the continent’s diverse weather conditions—from tropical heat to arctic cold.
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Our flagship surge arrester, the Shield7, is a polymer-housed, gapless metal-oxide surge arrester that delivers exceptional performance and reliability. Engineered to meet the latest ANSI and CSA standards, the Shield7 incorporates advanced design elements that set it apart from conventional surge protection solutions.
Features & Benefits
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With optimized electrical characteristics including high discharge current and thermal charge transfer ratings, it provides ideal protection for distribution systems and equipment against overvoltages.
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Featuring robust, weatherproof construction that ensures reliable operation even in the harshest environments.
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Highly customizable with various accessories to meet specific customer requirements.
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Engineered for exceptional performance and reliability, it is trusted by utilities and industrial installations across North America.
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Designed with flexibility and customization for seamless integration with existing infrastructure and operational requirements.
Applications
The Shield7 surge arrester is designed to protect power networks and their connected equipment from overvoltages, playing an essential role in enhancing power quality and supply reliability.
Its key benefits include:
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Protecting distribution systems and equipment from damaging surges.
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Enhancing overall power quality and system reliability.
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Extending the lifetime of valuable assets.
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Integrating seamlessly with existing infrastructure.
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By delivering robust, reliable protection, the Shield7 helps maintain grid stability and operational continuity.
Other applicable standards:
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ANSI/IEEE C62.11 : “IEEE standard for metal-oxide surge arresters for alternating current power circuits”
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IEC 60071-1 : “Insulation co-ordination / Part 1 : Definitions, principles and rules”
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IEC 60099-5 : “Surge Arresters / Part 5 : Selection and application recommendations”
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IEC 60270 : “Partial discharge measurements”
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IEC 60507 : “Artificial pollution tests on high-voltage insulators to be used on a.c. systems”
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IEC 60815 : “Guide for the selection of insulators in respect of polluted conditions”
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IEC 61109 : “Composite insulators for a.c. overhead lines with a nominal voltage greater than 1000 V – Definitions, test methods and acceptance criteria”
Operating conditions
Ambient temperature : - 50°C up to + 50°C (-58°F to 122°F)
Technical Features
IEC Standards:
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Rated voltage Ur : 3 kV to 36 kV
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Nominal discharge current In : 10 kA
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Classification (ed. 2014) : Designation DH
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Repetitive charge transfer rating Qrs : 0.5 C (*)
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Thermal charge transfer rating Qth : 1.1 C
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Line discharge class (ed. 2009) : Class 1
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High current impulse : 100 kA
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Long duration current impulse : 300 A / 2000 µs
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Short circuit withstand Is : 20 kA / 0.2 s
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Specified long-term load SLL : 100 Nm
* performance level greater than IEC requirement (0.4 C)
IEEE Standards:
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MCOV : from 2.55 kV to 19.5 kV
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Lightning impulse classifying current Iclass : 10 kA
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High current impulse : 100 kA
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Single impulse charge transfer rating Qrs : 0.49 C
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Thermal charge transfer rating Qth : 1.1 C
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Rated short circuit current Is : 20 kA
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Maximum design cantilever load : 100 Nm (75 ft lbf)
Shield7 surge arresters meet the highest standards for Category IV pollution levels
Areas generally of moderate extent, very close to the coast and exposed to sea spray or to very strong and polluting winds from the sea. Also suitable for other harsh environments such as deserts, characterized by no rainfall for long periods and exposure to strong winds carrying sand and salt.
Optional accessories:
Hardware customizable according to your specifications
IEC Standards:
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Metal brackets for cross-arm or transformer mounting
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Lead wire option in 0.3m (LW1) and 1.3m (LW2) lengths
IEEE Standards:
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3/8” stainless steel connecting parts (clamp. washers. nuts)
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Metal brackets for cross-arm or transformer mounting
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Lead wire option in 11.8’’ (LW1) and 51.1’’ (LW2) lengths
TECHNICAL CHARACTERISTICS:
IEC Standards:
IEEE Standards:
CONTACT US
What can we do for you today?
Whether you need information about our solutions, a project requiring specialist support or any other requests, do not hesitate to contact us. We will get back to you very soon.