A device designed to carry current but not to make or break current. It is used in conjunction with a tap changer or selector switch. When moving from one extreme position to another, the contact of the tap selector or selector switch and the tap connected to it can be used more than once. Conversion selector, also known as directional switch, polarity switch, reverse switch, preselection switch and commutator, commutator; In the multi range voltage regulation method, it is also known as a coarse switch, coarse adjustment switch, or coarse selection switch. A device designed to carry current but not to make or break current. It is used in conjunction with a tap changer or selector switch. When moving from one extreme position to another, the contact of the tap selector or selector switch and the tap connected to it can be used more than once. The conversion selector is used to expand the tapping range without increasing the transformer winding tap, which is beneficial for the manufacturing of transformers. The conversion selector is further divided into polarity selector (forward and reverse call) and coarse selector (coarse and fine call). The driving mechanism can be directly composed of an electric motor and matching auxiliary interlocking devices (composite switches), or composed of an electric motor box, transmission rod, and gear box, all of which can be equipped with an automatic controller to automatically adjust the voltage. It comes in two forms: a polarity converter and a coarse selector
Function of testing report:
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1. Telephone communication and confirmation of requirements
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1. The testing industry is fully covered, meeting different testing needs
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