3 The ground transformer uninterruptible replacement method using the ground transformer elbow connector three phase batch separation connection apparatus and feed through

The present invention relates to a ground transformer uninterruptible replacement method using a ground-mounted transformer elbow connector three-phase batch separation connection apparatus and a feedthrough, which is able to connect a ground-mounted transformer to be replaced and a ground-mounted transformer not to be replaced by a three-phase batch separation apparatus, so that ground-mounted transformers not replaced during the replacement process of the ground-mounted transformer to be replaced can continue to supply electricity to the receptor side. Therefore, the inconvenience of the receptor side by power outages can be relieved by the replacement of an uninterrupted ground-mounted transformer. A high-voltage-side elbow is easily separated, and an elbow is easily connected as well. The process of separating the elbow is simplified, so that the time required for replacing the ground-mounted transformer is greatly reduced. In addition, electricity can be continuously supplied to the receptor side while the ground-mounted transformer is being replaced by using the uninterrupted power supply, so that any inconvenience in using information communication devices on the receptor side can be prevented. In addition, damages to electrical equipment in accordance with the power outage for the replacement work of the ground-mounted transformer and accidents to workers can be prevented. 본 발명은 교체대상지상변압기와 교체미대상지상변압기를 3상일괄분리장치로 연결하여 교체대상지상변압기의 교체작업 동안에 교체하지 않은 지상변압기들로 하여금 수용가측에 계속해서 전기를 공급하도록 하여 무정전 지상변압기의 교체에 의해 수용가측의 전원공급단락에 의한 불편함을 해결할 수 있으며, 고압측 엘보를 쉽고 용이하게 분리함은 물론 엘보의 연결작업 역시 용이하게 이루어지도록 하며, 엘보의 분리과정을 단순화하여 지상변압기의 교체작업 시간을 크게 단축할 수 있으며, 무정전에 의해 지상변압기를 교체하는 동안 수용가측에 계속적으로 전기를 공급할 수 있어 수용가측에 정보통신기기의 사용에 대한 불편함을 해결할 수 있으며, 지상변압기의 교체작업을 위해 정전에 따른 각종 전기기기의 손상에 대한 방지는 물론, 작업자의 안전사고를 미연에 방지할 수 있는 지상변압기 엘보접속재 3상일괄분리연결장치와 피드쓰루를 이용한 지상변압기 무정전교체방법이 개시된다.