ABB REM 610 Technical Reference Manual

Also see for REM 610: Operator's manual Product guide Installation manual Product guide Technical reference manual

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ABB REM 610 Technical Reference Manual Manual pdf 21 page image

21The estimated time to the next possible motor start up, i.e. when the restart disablesignal is reset, can be accessed either via the HMI or the SPA bus.If the restart disable function has been activated (SGF1/7=0), SGR3will be overridden.5.1.1.6. Motor start upA motor start-up situation is defined by means of the phase currents as follows:* Motor start up begins (the motor start-up signal is activated) when the maximumphase current rises from a value below 0.12 x FLA, i.e. the motor is at standstill,to a value above 1.5 x FLA within less than 60 ms.* Motor start up ends (the motor start-up signal is reset) when all phase currentsfall below 1.25 x FLA and remain below for at least 200 ms.The start-up time of the latest motor start up can be accessed via the HMI and readwith SPA parameter V3.The motor start-up signal is routed to the output contacts with the switches ofswitchgroups SGR1...SGR5.All operation targets on the LCD will be cleared when a motor start upbegins.5.1.1.7. Rated current of the protected unitA scaling factor, PU scale, can be set for the phase currents. This will allowdifferences between the rated current of the protected unit and that of the energizinginput. Consequently, the rated current of the relay can be set to equal the full loadcurrent (FLA) of the motor. A scaling factor, In , can be set for the phase currents.This will allow differences between the rated current of the protected unit and that ofthe energizing input. Consequently, the rated current of the relay can be set to equalthe full load current (FLA) of the motor.The current settings of the protection functions are related to the scaled ratedcurrent, FLA. The measured currents are presented either as primary values or asmultiples of the scaled rated current. The current values in the recorded data arepresented as multiples of the rated current.The scaling factor affects the operation accuracy of the protectionfunctions, with the exception of the ground-fault protection. The statedoperation accuracy for each protection function only applies when thescaling factor is 1.Motor Protection RelayTechnical Reference Manual - ANSI VersionREM 610REM 6101MRS755537