f Siemens Protection Relays SIPROTEC 4 Series SIPROTEC 7SJ64- A&S Automation Co., Ltd
 
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  • Address: 469 Xinsheng Road, Gaoxin District, Chengdu, China
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  • Email: sensor@esmachinery.com
  • Contact Person: Ivy

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The SIPROTEC 4 7SJ64 can be used as a protective control and monitoring relay for distribution feeders and transmission lines of any voltage in networks that are earthed (grounded), low-resistance earthed, unearthed, or of a compensated neutral point structure. The relay is suited for networks that are radial or looped, and for lines with single or multi-terminal feeds. The SIPROTEC 4 7SJ64 is equipped with a synchronization function which provides the operationmodes ‘synchronization check’ (classical) and ‘synchronous/asynchronous switching’ (which takes the CBmechanical delay into consideration). Motor protection comprises undercurrent monitoring, starting time supervision, restart inhibit, locked rotor, load jamprotection as well asmotor statistics.The 7SJ64 is featuring the "flexible protection functions".Up to 20 protection functions can be added according to individual requirements. Thus, for example, rate-of-frequency-change protection or reverse power protection can be implemented. The relay provides easy-to-use local control and automation functions. The number of controllable switchgear depends only on the number of available inputs and outputs. The integrated programmable logic (CFC) allows the user to implement their own functions, e.g. for the automation of switchgear (interlocking). CFC capacity ismuch larger compared to 7SJ63 due to extended CPU power. The user is able to generate user-defined messages as well. The flexible communication interfaces are open formodern communication architectures with control systems.

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Siemens Protection Relays SIPROTEC 4 Series SIPROTEC 7SJ64- A&S Automation Co., Ltd

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