ABB Relion 670 series - Page 20

9.3.6 Monitored data.................................................................................................................................628
9.3.7 Operation principle..........................................................................................................................629
9.3.7.1 Measurement principle................................................................................................................629
9.3.7.2 Time delay...................................................................................................................................... 629
9.3.7.3 Blocking.......................................................................................................................................... 634
9.3.7.4 Design............................................................................................................................................. 634
9.3.8 Technical data...................................................................................................................................635
9.4 Overexcitation protection OEXPVPH (24)....................................................................................... 636
9.4.1 Identification.................................................................................................................................... 636
9.4.2 Functionality..................................................................................................................................... 636
9.4.3 Function block..................................................................................................................................636
9.4.4 Signals................................................................................................................................................ 637
9.4.5 Settings..............................................................................................................................................637
9.4.6 Monitored data................................................................................................................................ 638
9.4.7 Operation principle......................................................................................................................... 638
9.4.7.1 Measured voltage......................................................................................................................... 641
9.4.7.2 Operate time of the overexcitation protection...................................................................... 641
9.4.7.3 Cooling........................................................................................................................................... 645
9.4.7.4 Overexcitation protection function measurands.................................................................. 645
9.4.7.5 Overexcitation alarm................................................................................................................... 646
9.4.7.6 Logic diagram............................................................................................................................... 646
9.4.8 Technical data...................................................................................................................................647
9.5 Voltage differential protection VDCPTOV (60).............................................................................. 647
9.5.1 Identification.................................................................................................................................... 647
9.5.2 Functionality..................................................................................................................................... 647
9.5.3 Function block..................................................................................................................................648
9.5.4 Signals................................................................................................................................................648
9.5.5 Settings............................................................................................................................................. 649
9.5.6 Monitored data................................................................................................................................ 649
9.5.7 Operation principle......................................................................................................................... 650
9.5.8 Technical data...................................................................................................................................651
9.6 100% Stator ground fault protection, 3rd harmonic based STEFPHIZ (59THD).....................652
9.6.1 Identification.................................................................................................................................... 652
9.6.2 Functionality..................................................................................................................................... 652
9.6.3 Function block.................................................................................................................................. 653
9.6.4 Signals................................................................................................................................................654
9.6.5 Settings............................................................................................................................................. 654
9.6.6 Monitored data................................................................................................................................ 655
9.6.7 Operation principle......................................................................................................................... 656
9.6.8 Technical data.................................................................................................................................. 660
9.7 Loss of voltage check LOVPTUV (27)............................................................................................... 660
9.7.1 Identification....................................................................................................................................660
9.7.2 Functionality..................................................................................................................................... 661
Table of contents
14
Technical manual