U1<ST1TR1tReset1t1IEC10000040-3-en.vsdIEC10000040 V3 EN-USFigure 124: Example for Definite Time Delay stage 1 operation9.3.7.3 Blocking M15331-18 v7It is possible to block two step residual overvoltage protection ROV2PTOVpartially or completely by binary input signals where:BLOCK: blocks all outputsBLKTR1: blocks all trip outputs of step 1BLKST1: blocks all start and trip outputs related to step 1BLKTR2: blocks all trip outputs of step 2BLKST2: blocks all start and trip inputs related to step 29.3.7.4 Design M15331-32 v7The voltage measuring elements continuously measure the residual voltage.Recursive Fourier filters filter the input voltage signal for the rated frequency. Theresidual voltage is compared to the set value, and is also used for the inverse timecharacteristic integration. The design of the function is schematically described infigure 125.1MRK 505 394-UEN A Section 9Voltage protectionLine differential protection RED650 2.2 IEC 263Technical manual
