| 摘要 |
An electronic meter measuring electricity usage of a non-contact terminal style is provided to make a wattmeter small by installing a CT-ring current transformer inside a body of the wattmeter. In an electronic meter measuring electricity usage of a non-contact terminal style, a plurality of wire pipes are formed inside of the body of a wattmeter. A CT-ring current transformer(22) surrounds the outside of a bridge line(11) passing through the wire pipes. The CT-ring current transformer is installed inside the body so that it is detachable. A bridge line is passed into the inside of CT-ring current transformer. A branch line passing the inside of CT-ring current transformer and a connection lien connected from the branch line is branched. The branch line is connected with the CT-ring current transformer and a main circuit. |
