During disturbed conditions, the trip security function can cope with high bit errorrates up to 10-5 or even up to 10-4. The trip security can be configured to beindependent of COMFAIL from the differential protection communicationsupervision, or blocked when COMFAIL is issued after receive error >100ms.(Default).Synchronization in SDH systems with G.703 E1 or IEEE C37.94The G.703 E1, 2 Mbit shall be set according to ITU-T G.803, G.810-13• One master clock for the actual network• The actual port Synchronized to the SDH system clock at 2048 kbit• Synchronization; bit synchronized, synchronized mapping• Maximum clock deviation <±50 ppm nominal, <±100 ppm operational• Jitter and Wander according to ITU-T G.823 and G.825• Buffer memory <250 μs, <100 μs asymmetric difference• Format.G 704 frame, structured etc.Format.• No CRC-checkSynchronization in PDH systems connected to SDH systems• Independent synchronization, asynchronous mapping• The actual SDH port must be set to allow transmission of the master clock fromthe PDH-system via the SDH-system in transparent mode.• Maximum clock deviation <±50 ppm nominal, <±100 ppm operational• Jitter and Wander according to ITU-T G.823 and G.825• Buffer memory <100 μs• Format: Transparent• Maximum channel delay• Loop time <40 ms continuous (2 x 20 ms)IED with echo synchronization of differential clock (without GPS clock)• Both channels must have the same route with maximum asymmetry of 0,2-0,5ms, depending on set sensitivity of the differential protection.• A fixed asymmetry can be compensated (setting of asymmetric delay in built inHMI or the parameter setting tool PST).IED with GPS clock• Independent of asymmetry.24.6 IEC/UCA 61850-9-2LE Merging unit requirementsThe merging units that supply the IED with measured values via the process bus mustfulfill the IEC/UCA 61850-9-2LE standard.Section 24 1MRK 502 071-UEN -Requirements760 Generator protection REG670 2.2 IEC and Injection equipment REX060, REX061, REX062Application manual
