Surge Arrester
Understand how surge arresters safeguard your devices from lightning and electrical surges.
Surge arrester limits overvoltage transients to safe levels. Protects equipment from lightning strikes, switching transients, and power line disturbances.
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Non-linear varistor changes resistance with voltage. At normal voltage, blocks current. Surge detected, resistance drops instantly, diverting transient to earth.
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Type 1: direct lightning strikes (highest energy). Type 2: distribution level (standard switching). Type 3: sub-panels/sensitive loads. Use Type 1+2 combination for complete protection.
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Install if facility exposed to lightning risk, has sensitive equipment (IT/HVAC/controls), or experiences frequent power anomalies. Mandatory in high-risk zones.
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