Section 2 Application2.1 General IED applicationGUID-3F024D79-D031-42DC-B0BC-1F3757B8D3E0 v3Breaker protection REQ650 provides a standalone solution for applications wheresynchrocheck controlled closing of the circuit breaker is required, but the integration of theautomatic reclosing function into the main line protection IED is not preferred or suitable. Theadvanced automatic reclosing, synchronizing, synchrocheck and energizing check functions ofREQ650 provides an optimized standalone product.REQ650 provides backup to the main protection with redundant protection and controlfunctions.One pre-configured package has been defined for the following application:• A breaker bay connecting a transmission line to a busbar, with back-up protectionfunctions enabling single or three phase trip (B11)The backup protection is based on basic overcurrent and voltage based functions. In lineprotection applications, autoreclosing with or without synchrocheck is available.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 incorporatesmanagement of user accounts, roles and certificates and the distribution of such, a procedurecompletely transparent to the user.The Flexible Product Naming allows the customer to use an IED-vendor independent 61850model of the IED. This customer model will be used as the IEC 61850 data model, but all otheraspects of the IED will remain unchanged (e.g., names on the local HMI and names in the tools).This offers significant flexibility to adapt the IED to the customers system and standardsolution2.2 Back-up protection functions GUID-A8D0852F-807F-4442-8730-E44808E194F0 v11IEC 61850 ANSI Function description BreakerREQ650 (B11)Current protectionPHPIOC 50 Instantaneous phase overcurrent protection 1OC4PTOC 51_671) Four step phase overcurrent protection 1PH4SPTOC 51 Four step single phase overcurrent protectionEFPIOC 50N Instantaneous residual overcurrent protection 1Table continues on next page1MRK 505 355-UEN A Section 2Application21Application manual
