Device for protecting against short circuit to the ground in a four-line three-phase circuit with dead earthed neutral and mutiple-grounded neutral conductor
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Device for automatic control of number of operation power transformers of two-transformer substation
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Device for controlling a.c. voltage
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Device for automatic switching-off of isolating switch at lead-in of power transformer
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Device for earth leakage protection in three-phase four-wire system with solidly earthed neutral and regrounds of zero wire
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Device for automatic control of one-gang capacitor banks
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Device for automatic control of switch and switching-over relay protection sets of station for sectionalizing line with network redundancy
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Device for redundancy of electric networks
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Device for relay protection of sectionalized line with network redundancy from damage
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Device for switching-over relay protection sets in unitized line with network redundancy
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Reactive power regulating device
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Device for protecting three-phase four-wire mains with dead-earthed neutral and repeated earthing of zero wire against short circuit to earth
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Device for grounding protection of three-phase four-wire network with solidly grounded neutral
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Method of remote switching-off of electric power transmission line cut-out
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Device for automatic switching-on of reserve for sectionalized lines
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High-voltage distributing device switching cell
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Device for earthing protection of electric power network with dead earthed neutral wire
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Device for automatic disconnection of separator at power transformer input
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Device for removing glaze ice
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Device for relay protection of a sectioned line with network redundancy against damage
