| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate a test by simplifying the configuration. <P>SOLUTION: A test device 1<SB>M</SB>is provided on the main protection device 2 side and a test device 1<SB>S</SB>is provided on the terminal device 3 side. The main protection device 2 and the terminal device 3 are connected by an optical fiber cable 4 serving as a transmission system. A press button switch 5 inputs a concurrent fault input to the main protection device 2 via a trigger IN. The oscillation output (relay operation signal) of the terminal device 3 is supplied to a DC voltmeter 6. In a counter test (temporal characteristic test) of a relay using the test devices 1<SB>M</SB>and 1<SB>S</SB>, the concurrent fault input is transmitted from the trigger IN to the main protection device 2 and the terminal device 3 via the optical fiber cable 4 as a transmission system. Then, the main protection device 2 and the terminal device 3 simultaneously output and supply a signal of a trigger OUT to the test devices 1<SB>M</SB>and 1<SB>S</SB>as a state change signal. <P>COPYRIGHT: (C)2009,JPO&INPIT |
