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The PROTEC B2S(R) 50 (3+1) is a part of PROTEC series over voltage surge protective devices that has been developed to protect against partial direct and indirect lightning discharges and is intended to provide protection in zones 0A - 1 as per IEC 62305. The plug-in module / base design facilitates replacement of a failed module in situ without the need to remove system wiring. PROTEC B2S(R) 50 (3+1) combines three PROTEC B2S 12,5 units and a PROTUBE B2S, to provide protection for TT three phase networks, where N and PE galvanic isolation is required.
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