| 摘要 |
The invention provides a switching device and an interlock test method thereof. The interlock test between a three-position switch with cutting off and circuit break functions and a protective relay can be carried out through the switching device. The switching device comprises a three-position switch with cutting off/ circuit break functions, a protective relay providing cutting off/ circuit break instructions for the switch, a circuit shifting device 6 shifting between cutting-off/ circuit-break functions when respective instruction is received from the protective relay, a bus supplying power to the switch, and cables supplying power from the switch to loads. |
