| 摘要 |
PURPOSE:To prevent an increase in the contact resistance, by a method wherein blade terminals (projection) of a socket terminal for separating direct connection between a power source side wire and a load side wire are built up with an insulator at least on one side thereof to come off sliding against blade receiving terminals so that the corrosion and the entry of a foreign matter will be prevented by a cleaning action. CONSTITUTION:To mount the body 20 of a watt-hour meter, blade-like terminals 24a-24d are inserted into blade receiving terminals 31a-31d of a socket terminal box 30. Here, as the length of an insulator projection 25 is shorter than the jut length of the blade-like terminals 24a and 24c, first the blade-like terminals 24a-24d are inserted into the respective terminals 31a-31d to supply power to a voltage coil 21 and a current coil 22. Then, the projection 25 is inserted into the blade receiving terminal 33 to separate the direct connection between a power source side wire 2b and a load side wire 3b. Since the projection 25 and the blade-like terminals 24a-24d are sliden against the terminal 33 and those 31a-31d respectively when inserted thereinto, any foreign matters on the respective terminals 33 and 31a-31d are forced out and any corrosion is scraped off.
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