- It is advice that Low voltage transfer switches Singapore are designed to power switches ,and is used to transfer power that’s why known as Transfer Switches Transfer switches are used for home, offices and factories and the places where the electricity is used. There are two types of low voltage switches: Manual and Automatic. Manual switch turns off the power from one circuit to another before switching it,while the automatic do it automatically. There is no need of intervention. It can protect you from fire .It a reliable product.