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Overcurrent protection for Low-Power CT and VT Applications– Applications The SIPROTEC 7SJ81 unit is a numerical protection with low power CT and VT inputs. The device performs control and monitoring functions and therefore provides the user with a cost-effective platform for power system management, that ensures reliable supply of electrical power to the customers. The ergonomic design makes control easy from the relay front panel. A large, easy-to-read display was a key design factor. Control The integrated control function permits control of disconnect devices, grounding switches or circuit-breakers through the integrated operator panel, binary inputs, DIGSI 4 or the control or automation system (e.g. SICAM). Programmable logic The integrated logic characteristics (CFC) allow the user to add own functions for automation of switchgear (e.g. interlocking) or switching sequence. The user can also generate user-defined messages. This functionality can form the base to create extremely flexible transfer schemes. Operational measured values Extensive measured values (e.g. I, V), metered values (e.g. Wp,Wq) and limit values (e.g. for voltage, frequency) provide improved system management. Operational indications Event logs, trip logs, fault records and statistics documents are stored in the relay to provide the user or operator with all the key data required to operate modern substations. Line protection The SIPROTEC 7SJ81 units can be used for line protection of high and medium-voltage networks with grounded, low-resistance grounded, isolated or a compensated neutral point. Transformer protection The relay provides all the functions for backup protection for transformer differential protection. The inrush suppression effectively prevents unwanted trips that can be caused by inrush currents. Backup protection SIPROTEC 7SJ81 can be used as a backup protection for a wide range of applications. Switchgear cubicles for high/medium voltage All units are designed specifi cally to meet the requirements of medium-voltage applications. In general, no separate measuring instruments (e.g., for current, voltage, frequency, …) or additional control components are necessary in the cubicles.
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Арматура DENDOR
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Датчики и измерители
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Регуляторы и регистраторы
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Пневматическое оборудование
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Краны и Клапаны
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Измерительные приборы
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Системы беспроводного управления «умный дом»
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Бесконтактные выключатели Конечные выключатели Оптические датчики Энкодеры
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SKW-FS - Установка умягчения
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SKW-FK - Установка обезжелезивания
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