A型控制器：置于轉換開關內部，監測兩路電源電壓，控制電源轉換動作。 CB級：是指轉換開關主體如符合GB14048.2、GB14048.9，這些產品本身具有短路、過載保護功能，因此雙電源也具有這些功能；而主體開關符合GB14048.3，本身產品不具有類似保護功能，屬于PC級；主體開關符合GB14048.4的則屬于CC級。 R：自投自負（意思是當常用電源出現異常后，雙電源會轉換至備用電源，而當常用電源恢復后，則轉換至常用電源，反之則屬于自投不自復）。

施耐德系列雙電源自動轉換開關型號： WATSGA-32/             WATSGB-32/          WATSNA-32A/            WATSNB-32A/ WATSGA-63/             WATSGB-63/          WATSNA-40A/            WATSNB-40A/ WATSGA-100/            WATSGB-100/         WATSNA-63A/            WATSNB-63A/ WATSGA-125/            WATSGB-125/         WATSNA-80A/            WATSNB-80A/ WATSGA-160/            WATSGB-160/         WATSNA-100A/           WATSNB-100A/ WATSGA-200/            WATSGB-200/         WATSNA-160A/           WATSNB-160A/ WATSGA-250/            WATSGB-250/         WATSNA-250A/           WATSNB-250A/ WATSGA-320/            WATSGB-320/         WATSNA-32A/4P            WATSNB-400A/ WATSGA-400/            WATSGB-400/         WATSNA-40A/4P            WATSNB-630A/ WATSGA-500/            WATSGB-500/         WATSNA-63A/4P            WATSNB-1000A/ WATSGA-630/            WATSGB-630/         WATSNA-80A/4P            WATSNB-1250A/ WATSGA-800/            WATSGB-800/         WATSNA-100A/4P           WATSNB-1600A/ WATSGA-32/4P             WATSGB-32/4P          WATSNA-160A/4P           WATSNB-32A/4P WATSGA-63/4P             WATSGB-63/4P          WATSNA-250A/4P           WATSNB-40A/4P WATSGA-100/4P            WATSGB-100/4P                                  WATSNB-63A/4P WATSGA-125/4P            WATSGB-125/4P                                  WATSNB-80A/4P WATSGA-160/4P            WATSGB-160/4P                                  WATSNB-100A/4P WATSGA-200/4P            WATSGB-200/4P                                  WATSNB-160A/4P WATSGA-250/4P            WATSGB-250/4P                                  WATSNB-250A/4P WATSGA-320/4P            WATSGB-320/4P                                  WATSNB-400A/4P WATSGA-400/4P            WATSGB-400/4P                                  WATSNB-630A/4P WATSGA-500/4P            WATSGB-500/4P                                  WATSNB-800A/4P WATSGA-630/4P            WATSGB-630/4P                                  WATSNB-1000A/4P WATSGA-800/4P            WATSGB-800/4P                                  WATSNB-12