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How to connect SQD surge arrester in Consumer Unit or Load Center ?

The QO-SPD225 is single phase surge arrester but size of it is equal to mcb 2pole. It will spend 2circuits per each one = 6circuits for 3 of QO-SPD225 by plug on it as branch mcb for each phase of 3phase load center. After that, connect the pre-wiring on QO-SPD225 to ground terminal.
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