Section 2 Application2.1 General IED applicationGUID-2E886C66-C954-40F8-9C0E-0BBF4A0A8A54 v2RED650 is used for the protection, control and monitoring of overhead lines and cables insolidly or impedance earthed networks. It is suitable for the protection of heavily loaded linesand multi-terminal lines where the requirement for fast one- and/or three-phase tripping iswanted. Back-up protection and apparatus control for 1 circuit breaker is included.The phase segregated current differential protection provides an excellent sensitivity for highresistive faults and gives a secure phase selection. The availability of six stabilized currentinputs per phase allows use on multi-breaker arrangements in two or three terminalapplications. The communication between the IEDs involved in the differential scheme isbased on the IEEE C37.94 standard and can be made redundant for improved reliability.Charging current compensation allows high sensitivity, even on long overhead lines andcables.The full scheme distance protection provides protection of power lines with high sensitivityand low requirements on remote end communication. The 6 zones have fully independentmeasuring and setting ranges which gives high flexibility for all types of lines. Loadencroachment and adaptive reach compensation are included.The multi-shot autoreclose includes priority features for double-breaker arrangements. It co-operates with the synchrocheck function with high-speed or delayed reclosing.Breaker failure, high set instantaneous phase and earth overcurrent, four step directional ornon-directional delayed phase and earth overcurrent and two step undervoltage protection areincluded and configured as back-up protection.The impedance protection and the directional overcurrent protection can communicate with aremote end in any teleprotection communication scheme. The advanced logic capability,where the user logic is prepared with a graphical tool, allows special applications.Communication for teleprotection schemes can be realized over the differential protectioncommunication link.Disturbance recording and fault locator are available to allow independent post-fault analysisafter primary disturbances.One pre-configured package has been defined for the following application:• 2 / 3 terminal line differential protection and six zone distance protection withquadrilateral and mho characteristic, for single and three-pole tripping (A11)The package is configured and ready for direct use. Analog and control circuits have been pre-defined and other signals need to be applied as required for each application. The pre-configured IED can be changed and adapted to suit specific applications with the graphicalconfiguration tool.Forcing of binary inputs and outputs is a convenient way to test wiring in substations as wellas testing configuration logic in the IEDs. Basically it means that all binary inputs and outputson the IED I/O modules (BOM, BIM and IOM) can be forced to arbitrary values.Central Account Management is an authentication infrastructure that offers a secure solutionfor enforcing access control to IEDs and other systems within a substation. This incorporates1MRK 505 363-UEN A Section 2Application23Application manual
