Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
267 words
A power stoppage minimizing system for a distribution line, comprising: first and second distribution lines each connected through a circuit breaker to a corresponding bus and having a plurality of switches; a normally open tie point switchgear provided between adjacent ends of said first and second distribution lines; a protective relay for opening the circuit breaker a fixed time after the occurrence of a short circuit on the first distribution line; communicating means for transmitting signals among said plurality of switches; and a father station for transmitting the signals to said plurality of switches by means of said communicating means, wherein said switchgear includes: means for transmitting an overcurrent signal to other switchgears at a power supply side of the distribution line by means of said communicating means, when the overcurrent signal on the distribution line is detected, means for inputting the overcurrent signal indicating that the overcurrent from the switchgear at a load side on the distribution line is detected, and opening means for outputting a signal to open a personal switch within the fixed time on the conditions that the overcurrent signal is transmitted by the overcurrent signal transmitting means and that no overcurrent is inputted from the switchgear at the load side by the overcurrent signal inputting means, and said father station includes: opening command outputting means for giving a command for opening the switch to the switchgear on the side of the load from the position of the switchgear operated by said opening means, and switch closing command outputting means for giving a closing command of the switch to the tie point switchgear.
Claim 2
Dependent Claim
267 words
A power stoppage minimizing system for a distribution line, comprising: first and second distribution lines each connected through a circuit breaker to a corresponding bus and having a plurality of switches; a normally open tie point switchgear provided between adjacent ends of said first and second distribution lines; a protective relay for opening the circuit breaker a fixed time after the occurrence of a short circuit on the first distribution line; communicating means for transmitting signals among said plurality of switches; and a father station for transmitting the signals to said plurality of switches by means of said communicating means, wherein said switchgear includes: means for transmitting an overcurrent signal to other switchgears at a power supply side of the distribution line by means of said communicating means, when the overcurrent signal on the distribution line is detected, means for inputting the overcurrent signal indicating that the overcurrent from the switchgear at a load side on the distribution line is detected, and opening means for outputting a signal to open a personal switch within the fixed time on the conditions that the overcurrent signal is transmitted by the overcurrent signal transmitting means and that no overcurrent is inputted from the switchgear at the load side by the overcurrent signal inputting means, and said father station includes: opening command outputting means for giving a command for opening the switch to the switchgear on the side of the load from the position of the switchgear operated by said opening means, and switch closing command outputting means for giving a closing command of the switch to the tie point switchgear.
Claim 3
Dependent Claim
39 words
A power stoppage minimizing system for a distribution line according to claim 1, wherein said father station inputs the detected overcurrent signal from said plurality of switches and locates the position of a short circuit in the distribution line.
Claim 4
Dependent Claim
30 words
A power stoppage minimizing system for a distribution line according to claim 1, wherein said father station outputs a command for closing the switch against the switchgear opening the switch.
Claim 5
Dependent Claim
75 words
A power stoppage minimizing system according to claim 1, wherein each of the switches has the function of detecting a short circuit, sending a signal indicative of the detection of the short circuit through a communication line, and opening that switch when same detects the short circuit and receives no signal indicative of the detection of the short circuit from the side of the load, or in accordance with a command from the father station.