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Basil Katakuzinos

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Have noticed that the Blue OBO Arrestors are nealry always used in tandem with the orange ones (C50 and V50 are used together), I am quite new to this and am curious on what the difference between their functions are. Here is an image. Is it recomended to use both? what does the one do that the other one does not?


V50-1+NPE-280 OBO BETTERMANN - Surge arrestor | Type 1+2; Poles: 1+NPE;  30kA; 280VAC; DIN; -40÷80°C; OBO-5093522 | TME - Electronic components


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