Remotely-controllable relays
First Claim
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1. A remotely-controllable relay for effecting an operation in response to a control signal in the form of an alternating ripple voltage superimposed upon an alternating power supply voltage in an electric-power distribution network, comprising:
- means arranged to store predetermined parameters of said operation and said control signal, said parameters including an indication of a preselected period of delay required between reception of said control signal and occurrence of said operation, the value of a predetermined constant, and the value of a predetermined unit time interval, said period of delay being equal to the product of said constant and said unit time interval;
means responsive to said storage means and coupled to said network to detect the transmission of a control signal conforming to said stored predetermined parameters relating thereto;
means responsive to said detection means and said storage means and arranged to determine when said period of delay has elapsed following said transmission; and
means responsive to said delay determining means and said storage means and arranged to effect said operation in accordance with said stored predetermined parameters relating thereto.
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Abstract
A ripple control relay is arranged (i) to delay implementation of a received command until the end of a predetermined time interval following reception of the command; (ii) to delay implementation as in (i), and to implement the complementary command automatically after a further predetermined interval; or (iii) to repeat the sequence as in (ii) cyclically.
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Citations
10 Claims
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1. A remotely-controllable relay for effecting an operation in response to a control signal in the form of an alternating ripple voltage superimposed upon an alternating power supply voltage in an electric-power distribution network, comprising:
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means arranged to store predetermined parameters of said operation and said control signal, said parameters including an indication of a preselected period of delay required between reception of said control signal and occurrence of said operation, the value of a predetermined constant, and the value of a predetermined unit time interval, said period of delay being equal to the product of said constant and said unit time interval; means responsive to said storage means and coupled to said network to detect the transmission of a control signal conforming to said stored predetermined parameters relating thereto; means responsive to said detection means and said storage means and arranged to determine when said period of delay has elapsed following said transmission; and means responsive to said delay determining means and said storage means and arranged to effect said operation in accordance with said stored predetermined parameters relating thereto. - View Dependent Claims (2, 3, 4, 5)
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6. A method of effecting an operation in response to a control signal in the form of an alternating ripple voltage superimposed upon an alternating power supply voltage in an electric-power distribution network, comprising the steps of:
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storing predetermined parameters of said operation and said control signal, said parameters including an indication of a preselected period of delay required between reception of said control signal and occurrence of said operation, the value of a predetermined constant and the value of a predetermined unit time interval, said period of delay being equal to the product of said constant and said unit time interval; detecting the transmission of a control signal conforming to said stored predetermined parameters relating thereto; determining when said period of delay has elapsed following said transmission; and
thereuponeffecting said operation in accordance with said stored predetermined parameters relating thereto. - View Dependent Claims (7, 8, 9, 10)
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Specification