Sepam - HV/MV Protection and control units (ENG) - Trinet

0,05IbIsF441/1F441/2F441/3F441/4F441/5ISTCase of excessive starting time followed by a locked rotorSensorsLTExcessive starting time and locked rotor protectionis related to the currents connected to the followingconnectors:current sensor connector1 A or 5 A CT 2BCSP2L1, 2L2, 2L3CharacteristicsIs set pointsettingresolution 1%accuracy (1) ±5%inhibition50% Ib i Is i 500% Ib999 %Ibpercentage of pick-up (93.5 ±5)%ST and LT time delayssetting ST 500 ms i T i 655 sresolutionaccuracy (1)LT50 ms i T i 655 s10 ms or 1 digit±2% or ±25 mscharacteristics timesexcessive starting time < 40 mstripping timelocked rotorLTtripping timememory time< 25 msfault recognition time < 30 msreset time< 45 msoutputs available for control logicexcessive starting time F441/1ST time delay in progress F441/2locked rotor F441/3F441/1 or F441/3 F441/4I greater than 5% Ib F441/5remote reading, remote setting* (1)function code F44 44hidentification number 1parameters Is unit: % Ib (2)(order of parameters) ST time delay unit: 10 x msLT time delayunit: 10 x ms(1)the data formats are defined in the manuals which describe each communication protocol.(2)percentage of basis current of load Ib.(3)under reference conditions (IEC 60255-6)Special useReaccelerationDuring reacceleration, the motor absorbs current that is similar to starting current(> Is) without the current having previously dropped to a value of 5% less than Ib.A logic data input may be used to:c reset the excessive starting time protection,c set the locked rotor protection LT time delay to a low value.Diagram of useKxxxKxxx identifies reaccelerationK854* function available as of version 9802 SFT2800.Protection functions2/39