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FR2205670B1
(en)
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US3160786A
(en)
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Polyphase voltage balance detector
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US2845581A
(en)
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Impedance type electronic relay
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US2201829A
(en)
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Protective apparatus
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US3210606A
(en)
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Protective relaying systems
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US2804578A
(en)
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Phase-comparison distance relay
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US2981867A
(en)
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Electric relay
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US2511680A
(en)
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Electronic relay arrangement for protecting power systems
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US3144586A
(en)
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Protective relay assemblies
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US4222085A
(en)
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Method and apparatus for the distance-selective fault monitoring of electrical lines
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US2775725A
(en)
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Electric relay devices
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US3133230A
(en)
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Electroresponsive protective systems
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US3629658A
(en)
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Static impedance relay
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DE717579C
(en)
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Fast distance protection device in single relay circuit
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CH299502A
(en)
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Resistance relay arrangement dependent on the angle between voltage and current in a cable.
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GB566805A
(en)
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Improvements in electric impedance relay means and in protective equipment for electrical power systems utilising same
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AT169748B
(en)
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CH308663A
(en)
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Selective protection device.
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