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公开(公告)号：BR7801473A
公开(公告)日：1978-10-31
申请号：BR7801473
申请日：1978-03-10
Applicant: ASEA AB
Abstract: A protective device for a capacitor bank is coupled to a cross-connection between equipotential points in two sub-banks forming the bank. Current or voltage surges, indicative of a capacitor failure are counted and when a threshold level is exceeded, an alarm may be energized.
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公开(公告)号：SE406996B
公开(公告)日：1979-03-05
申请号：SE7702749
申请日：1977-03-11
Applicant: ASEA AB
Abstract: A protective device for a capacitor bank is coupled to a cross-connection between equipotential points in two sub-banks forming the bank. Current or voltage surges, indicative of a capacitor failure are counted and when a threshold level is exceeded, an alarm may be energized.
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公开(公告)号：SE7702749L
公开(公告)日：1978-09-12
申请号：SE7702749
申请日：1977-03-11
Applicant: ASEA AB
Abstract: A protective device for a capacitor bank is coupled to a cross-connection between equipotential points in two sub-banks forming the bank. Current or voltage surges, indicative of a capacitor failure are counted and when a threshold level is exceeded, an alarm may be energized.
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Patent Agency Ranking
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公开(公告)号：SE449151B
公开(公告)日：1987-04-06
申请号：SE8303481
申请日：1983-06-17
Applicant: ASEA AB
Inventor： FAHLEN N
Abstract: A linear resistor is serially connected to a voltage-dependent metal oxide varistor and the series-connected resistor elements are connected in parallel with the series capacitor of a high voltage network to provide an overvoltage protection circuit for the series capacitor. A spark gap is also connected in parallel with the series-connected resistor elements in case of overload thereof. The voltage across the linear resistor triggers device for firing the spark gap when the voltage across the linear resistor exceeds a predetermined voltage. The resistance of the linear resistor and that of the varistor is dimensioned such that the predetermined voltage constitutes the smaller part of the voltage across the capacitor.
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公开(公告)号：SE8303481L
公开(公告)日：1984-12-18
申请号：SE8303481
申请日：1983-06-17
Applicant: ASEA AB
Inventor： FAHLEN N
Abstract: A linear resistor is serially connected to a voltage-dependent metal oxide varistor and the series-connected resistor elements are connected in parallel with the series capacitor of a high voltage network to provide an overvoltage protection circuit for the series capacitor. A spark gap is also connected in parallel with the series-connected resistor elements in case of overload thereof. The voltage across the linear resistor triggers device for firing the spark gap when the voltage across the linear resistor exceeds a predetermined voltage. The resistance of the linear resistor and that of the varistor is dimensioned such that the predetermined voltage constitutes the smaller part of the voltage across the capacitor.
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公开(公告)号：SE8401255D0
公开(公告)日：1984-03-07
申请号：SE8401255
申请日：1984-03-07
Applicant: ASEA AB
Inventor： FAHLEN N
IPC: H02H7/16
Abstract: A series capacitor bank for connection into an electric power supply network is provided with overvoltage protective equipment having two branches connected in parallel with the capacitor bank. The first branch comprises a first zinc oxide varistor in series with a linear resistor and the second branch comprises a varistor with a higher "knee" voltage than the first zinc oxide varistor. The resistance of the linear resistor is preferably of the same order of magnitude as the absolute value of the impedance of the capacitor bank at the operating frequency of the power supply network. The "knee" voltage of the second varistor is at least 1.15 times (and preferably not more than 2.0 times) the "knee" voltage of the first varistor.
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公开(公告)号：SE8303481D0
公开(公告)日：1983-06-17
申请号：SE8303481
申请日：1983-06-17
Applicant: ASEA AB
Inventor： FAHLEN N
Abstract: A linear resistor is serially connected to a voltage-dependent metal oxide varistor and the series-connected resistor elements are connected in parallel with the series capacitor of a high voltage network to provide an overvoltage protection circuit for the series capacitor. A spark gap is also connected in parallel with the series-connected resistor elements in case of overload thereof. The voltage across the linear resistor triggers device for firing the spark gap when the voltage across the linear resistor exceeds a predetermined voltage. The resistance of the linear resistor and that of the varistor is dimensioned such that the predetermined voltage constitutes the smaller part of the voltage across the capacitor.
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