ABOUT MODE HIGH POWER AC CONTACTOR ON A FAILURE; THE SUPPLY VOLTAGE OF 0.4 KV POWER; VOLTAGE FAILURE; NETWORK
power substations is discussed. Theses differences dictate two different sets of requirements for the supplying
of power to large AC contactors. In accordance with these requirements the article offers two technical
solutions: one of which is based on the contactor remaining in the closed position at voltage sag; and the
second is based on the instantaneous switching-off of the contactor at voltage sag with a subsequent
switching-on with time delay following voltage level restoration.
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ГОСТ 13109-97. Электрическая энергия. Совместимость технических средств электро-магнитная. Нормы качества электроэнергии в системах электроснабжения общего назначения (Electric energy. Electromagnetic compatibility of technical equipment. Power quality limits in public electrical systems).
IEC 61000-4-11 Ed. 2.0 b:2004. Electromagnetic compatibility (EMC) – Part 4–11: Testing and measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests.
IEC 61000-4-34 Ed. 1.0 b:2005. Electromagnetic compatibility (EMC) – Part 4–34: Testing and measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests for equipment with input current more than 16 A per phase.
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