terminal transformer unit ( ttu ) is an important portion of distribution automation . but most ttu products have some disadvantages like costly price, few functions, lack of compatibility, and so on 配電變壓器遠方終端單元(ttu)是配電自動化的重要組成部分,而目前國內(nèi)的大部分ttu產(chǎn)品都存在價格昂貴、功能不齊全、兼容性和通用性不夠等缺點。