Loss Of Load Protection Loflptuc - ABB Relion 630 Series Applications Manual

1MRS756785 A
3.2.6.5
REM630
Application Manual
The set of three phase currents, I3P, is connected to the inputs. The function
operates when the measured current is above the setting. The operation
characteristic is definite time.
The operate signal is used to trigger the disturbance recorder and to provide a LED
indication on the LHMI.
GUID-658AB3F3-DFE0-4896-BA9B-BFDDCFC4905B V1 EN
Figure 10: Motor stall protection

Loss of load protection LOFLPTUC

The loss of load protection is used for detecting sudden load loss which is
considered as a fault condition.
The set of three phase currents, I3P, is connected to the inputs and the function
operates when all the phase currents fall below the set level but stay above the set de-
energization level. It operates with definite time (DT) characteristics. The operate
signal is used to trigger the disturbance recorder.
Section 3
REM630 variants
31