| 摘要 |
<p>PURPOSE: To make it possible to easily remove a defective cell by including a photodiode for emitting signal in case of the occurrence of an arc, three phase three sum breakers and disconnectors, a three-phase grounding disconnector and a cable taking-out section. CONSTITUTION: The cell 1 is filled up with a dielectric gas, such as sulfur hexafluoride, and has the tripolar three phase breaker and disconnector between two pieces of the three phase disconnectors 11 and 12, a control member 13 controlled by an electronic control circuit 41 and the wiring cable taking-out section 14. Further, the cell 1 has the photodiode 15 connected to this electronic control circuit 41 therein. In case of the occurrence of trouble, i.e., an arc in the cell 11, the circuit 41 applies an open instruction to the defective cell 11 when the arc is detected by the diode 15. In addition, the signal emitted by the diode 15 for detecting the open of the breakers and disconnectors of the cell 1 is suppressed. As a result, the removal of the defective cell is facilitated.</p> |
