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SPD protettori sovratensione Regalux Milano
Surge Protection Devices operate according to the luminaries' protection class.
  1. In Class I, the SPD enhances protection of the driver between phase and neuter. Between neuter and ground, the SPD and a gas discharger suppress surcharges between the poles and ground, maintaining the voltage difference at around 2000V. A high-current 16A fuse is recommended in case of short-circuits. VPA1500KK1 and KK2 contain a thermal protection to interrupt the charge in case of damage to the varistor. 
  2. In Class II, surcharges cannot be sent to ground. Protections are more limited and operate either at input or at LED plate supply point. At input, the SPD enhances potection of the driver against overvoltages. At secondary site, PR4DS, PR8DS, RPR4DS create an equipotential point in case of unavailability of connection to the equipotential. VPR4DS1 also provides primary potection.

Surge Protection Devices Class I

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