Measuring and/or test device and method for measuring and/or estimating the quality and/or stability of power supply networks
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Circuitry for regulating and/or controlling alternating current (AC) voltage in AC power supply networks, has switching elements that are provided to connect secondary side of control transformer to primary side of control transformer
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Control / regulation of the secondary voltage of local power transformers through the use of line-commutated inverters
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Device for monitoring tap changers
DE102009014243A1
Local power transformer or circuit for electrical distribution transformer for control or regulation of voltage range of every phase for low voltage level, is provided with distribution transformer with primary and secondary coiling
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Device for the prevention of serious faults in electrical mains supply networks
