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Description
Overview
Essential details：RED615 HCDCACADNKC2DAE11E Line Differential Protection and Control
Product Description
RED615 is a phase-segregated two-end line differential protection and control IED (intelligent electronic device) designed 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® family and its 615 protection and control product series. Re-engineered from the ground up, the 615 series has been guided by the IEC 61850 standard for communication and interoperability of substation automation equipment.
The IED provides unit type main protection for overhead lines and cable feeders in distribution networks. The IED also features current-based protection functions for remote back-up for down-stream protection IEDs and local back-up for the line differential main protection. Further, standard configurations B and C also include earth-fault protection.
The IED is adapted for the protection of overhead line and cable feeders in isolated neutral, resistance earthed, compensated (impedance earthed) and solidly earthed networks. Once the IED has been given the application-specific settings, it can directly be put into service.
The 615 series IEDs support a range of communication protocols including IEC 61850 with GOOSE messaging, IEC 60870-5-103, Modbus® and DNP3.
RED615
Product parameter
The IED offers two-stage phase-segregated line differential protection, phase overcurrent protection, negative phase-sequence overcurrent protection and circuit-breaker failure protection. 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.
The line differential protection function includes a stabilized low stage and an instantaneous high stage. The stabilized low stage provides sensitive differential protection and remains stable during, for example, current transformer saturation conditions. The low-stage operation can be restrained using second harmonic detection if an out-of-zone power transformer is to be energized. The instantaneous high stage offers less sensitive differential protection but enables fast operation during high fault currents
APPLICATION
RED615 can be used in a variety of applications requiring an absolutely selective unit type protection system. The zone-ofprotection of a line differential protection system is the feeder section defined by the location of the current transformers in the local and the remote substation.
Combining horizontal GOOSE
communication over a station bus and binary signal transfer over the protection communication link offers new application possibilities beyond traditional line differential protection. One interesting application based on inter-substation signal transfer is loss-of-mains (LOM) protection in networks with distributed generation. The performance of the combination of binary signal transfer and horizontal GOOSE communication performance as to speed, selectivity and reliability are hard to match with conventional loss-of-mains protection.
RED615 is the ideal IED for the protection of feeders in network configurations containing closed loops. Under normal operating conditions the feeder loop is closed. The aim of the closed loop is to secure the availability of power for the end users. As a result of the closed loop configuration, any fault spot in the system will be fed with fault current from two directions. Using plain overcurrent protection, either directional or nondirectional, it is difficult to obtain fast and selective short circuit protection. With RED615 line differential protection IEDs the faulty part of the network can be selectively isolated, thus securing power distribution to the healthy part of the network.
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Superiority products RED615 HCDCACADNKC2DAE11E Line Differential Protection and Control
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