MiCOM P921/P922/P923 - Schneider - error

Technical GuideP92x/EN FT/H42User GuideMiCOM P921/P922/P923 Page 53/702.7.2.1 Example of configurationThe aim is:Latching of the output contact RL1, which is linked to the “tV>” information.Settings are:• select “YES” for the information which must be latched in the above menu: “tV>”,2.7.3 "BLOCKING LOG1 t" SubmenuThe principle of the blocked overcurrent protection involves the use of start contactsfrom downstream relays (P121 or P122 for example) wired onto blocking inputs ofupstream relays (P921, P922 or P923 for example).In the MiCOM P921 or P922-P923, the “BLOCKING LOGIC1 t” and “BLOCKINGLOGIC2 t” submenus allow the user to select time-delayed information, which will beblocked by a dedicated logic input (see “INPUTS” submenu, “BLOCK LOG1” or“BLOCK LOG2” input).To gain access to the “blockin logic” submenu from the “Automatic control” menu,press followed by or until the desired submenu header is displayed.AUTOMATIC CTRLBLOCKING LOG1 tHeading of the Automatic control menu. To gain access to themenu from the default display press followed by or untilthe menu is displayed.Heading of the “BLOCKING LOGIC 1” submenuBLOCK1 tFunction=NODescription: selection of the time-delayed information“tFunction”, which will be blocked by energisation of the “BLKLOG1” logic input.Range: YES/NORefer to the following table for protection functions list.tFunction P921 P922 P923 FunctiontU>tV0>, tV0>>or tV0>>>tV0der>,tV0der>> ortV0der>>>X X X Time delayed 1 st , 2 nd or 3 rd overvoltage thresholdX X X Time delayed 1 st , 2 nd or 3 rd zero sequence voltagethresholdX X Time delayed 1 st , 2 nd or 3 rd derived V0 sequence voltagethresholdtV2>or tV2>> X X Time delayed 1 st or 2 nd negative sequence overvoltagethresholdtV1< ortV1