Combination Surge Arrestor 20kA with NPE, 1+1 & 3+1 Module | Onesto SPD Module Configuration:3+1 (3P+N) agricultural and general cold-water systems
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Combination Surge Arrestor 20kA with NPE, 1+1 & 3+1 Module | Onesto SPD Module Configuration:3+1 (3P+N) agricultural and general cold-water systemsThe Onesto BY7 20 Combination Surge Protection Device is a compact, DIN rail mounted surge arrestor combining line and neutral to earth (NPE) protection in a single narrow module. Rated at 20kA, it is available in a 2 module 1+1 (single pole + neutral) configuration for single phase boards, or a 4 module 3+1 (three pole + neutral) configuration for three phase boards, at 275V or 385V. It is a practical, space saving choice where board space is limited
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