Line Differential Protection and Control RED615 Brochure - ABB Oy Distribution Automation - #1
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| | Line Differential Protection and Control RED615 Relion® 615 series | | |||
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| RED615 is a phase-segregated, two-end, line differential | |||||
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| protection and control IED perfectly harmonized for utility and industrial power systems, including looped and meshed distribution networks with or without decentralized power generation. RED615 is a member of ABB's Relion® product family and a part of its 615 protection and control product series. The 615 series IEDs are characterized by their compactness and withdrawable design. Re-engineered from the ground up, the 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability of substation automation equipment. | |||||
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| Application RED615 provides phase-segregated high-speed, longitudinal differential protection for overhead line and cable feeders in utility and industry distribution networks. Three standard RED615 configurations are available, a pure line-differential protection configuration and two extended configurations with additional protection functions. Two RED615s interconnected over a communication link form an absolutely selective unit protection scheme. Protection of ring-type and meshed distribution networks generally requires unit protection solutions, also applied in radial networks containing distributed power generation. Protection and control RED615 features two-stage, phase-segregated line differential protection, four-stage phase overcurrent protection, two-stage phase unbalance and loss-of-phase protection, and circuit-breaker failure protection. Further, RED615 incorporates a lockout relay and a second harmonic restraint function to identify inrush current conditions. Depending on the standard configuration chosen, the basic functionality can be extended by thermal overload protection, directional or non-directional earth-fault protection, sensitive earth-fault protection, phase | discontinuity protection, transient/intermittent earth-fault protection and three-pole multi-shot auto-reclose functions for overhead line feeders. Besides protection RED615 also offers the functionality needed for control of one circuit breaker. To protect the IED from unauthorized access and to maintain the integrity of information, the IED has been provided with a four-level, role-based user authentication system. Binary signal transfer Binary signal transfer (BST) can be used for carrying blocking and intertrip signals as well as status and position information between the local and remote end of the line. The BST functionality comprises eight binary signals, which are carried between the substations inside protection telegrams transferred over the communication link. The transfer of BST signals goes in both directions and the signal transfer time is extremely short, in the order of a few milliseconds. BST signalling and the logics of RED615 enable adaptive protection and control schemes to be engineered to create tomorrow's smart power systems. | ||||
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| Power and productivity for a better world1 | |||||
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