Low Voltage Lightning Protection Surge Protector Specification Model Parameter Selection - Secondary Surge Protector
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(1) Article 4.5.4, Article 3 of the national standard GB 50057-2010: A surge protector of Class II test should be installed on the power supply side of the switch in the distribution box. Its voltage protection level should not be greater than 2.5kV, and the nominal discharge current value should be determined according to the specific situation.
(2) Article 6.4.5, Article 2 of the national standard GB 50057-2010: When a surge protection device is required to be installed near the equipment to be protected, that is, at the interface of LPZ2 or higher zones, a surge protective device of Class II or Class III test should be selected for the electrical system.
