Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
191 words
Series capacitor bank for achieving an uninterrupted stabilization of the condition of operation in high-voltage electric power supply networks with a capacitor, and a back-up safety circuit connected in parallel with the capacitor, said safety circuit including means responsive to disturbances of a magnitude which causes overvoltages which may damage the capacitor to short-circuit the capacitor, comprising a first current path in parallel with the capacitor and said safety circuit, said first current path including a spark gap in series with a voltage-dependent resistor for controlling the current through the current path in dependence on the voltage across the capacitor, said resistor means having a very high resistance as long as the voltage across the capacitor is below a predetermined value which is dependent on the electric properties of the capacitor, said value being higher than the operating voltage of the capacitor but lower than the voltage at which said safety circuit becomes effective and short-circuits the capacitor, the resistance of the resistor means decreasing for voltages exceeding said predetermined value, whereby said capacitor is not short-circuited by said safety circuit with voltages between said operating voltage and said predetermined voltage.
Claim 2
Dependent Claim
191 words
Series capacitor bank for achieving an uninterrupted stabilization of the condition of operation in high-voltage electric power supply networks with a capacitor, and a back-up safety circuit connected in parallel with the capacitor, said safety circuit including means responsive to disturbances of a magnitude which causes overvoltages which may damage the capacitor to short-circuit the capacitor, comprising a first current path in parallel with the capacitor and said safety circuit, said first current path including a spark gap in series with a voltage-dependent resistor for controlling the current through the current path in dependence on the voltage across the capacitor, said resistor means having a very high resistance as long as the voltage across the capacitor is below a predetermined value which is dependent on the electric properties of the capacitor, said value being higher than the operating voltage of the capacitor but lower than the voltage at which said safety circuit becomes effective and short-circuits the capacitor, the resistance of the resistor means decreasing for voltages exceeding said predetermined value, whereby said capacitor is not short-circuited by said safety circuit with voltages between said operating voltage and said predetermined voltage.
Claim 3
Dependent Claim
37 words
Capacitor bank according to claim 1, having a second current path parallel to said first current path, the second current path comprising a reactor and a breaker, and a spark gap connected between the two current paths.
Claim 4
Dependent Claim
29 words
Capacitor bank according to claim 2, in which the resistor means comprises two partial resistors and said reactor is connected in parallel with only one of the partial resistors.
Claim 5
Dependent Claim
64 words
Capacitor bank according to claim 1, in which the resistor means comprises two series-connected partial resistors, a breaker having a main contact with delayed operation connected in parallel with the capacitor and an auxiliary contact means with instantaneous operation, to short-circuit the spark gap and the partial resistor located nearest the spark gap over an auxiliary spark gap before the main contact is closed.