ROLLER & BEARING AS 7G4833 - Caterpillar

System Operation Description:The EMCP 4 detects an overcurrent condition that persists for a duration that is a function of an over current level or a condition that exceeds a threshold for a programmed duration. If the RMS current of any phase goes above the Generator Definite Time Over Current (Amp) Percentage Threshold, a timer is started. The Generator Over Current event is made active.The tripping time for generator overcurrent detection is determined from the phase with the highest current, and is the smaller of two values: the Curve Time and the Generator Definite Time Over Current (Amp) Shutdown Event Notification Delay Time (setpoint value). If an overcurrent condition is detected, the "GEN OVER CURRENT SHUTDOWN" or "GEN OVERCURRENT " will be displayed on the EMCP 4. The display informs the operator of an overcurrent condition.Note: The severity of the overcurrent condition will determine if a warning or shutdown event occurs.Conditions Which Generate This Code:The code for generator overcurrent is generated when the EMCP 4 determines that a generator overcurrent condition has occurred. Test Step 1. TALK TO THE OPERATOR
Determine the conditions that caused the overcurrent condition. Expected Result:An overcurrent was caused by an occurrence that was known to the operator. The operator would like to put the genset back into service.Results:
OK - The operator can determine the cause for the overcurrent condition. The condition has been repaired and the operator wants to put the genset back into service.Repair: Reset the generator set. Resume normal operation and verify that the problem has been corrected.STOP
NOT OK - The overcurrent condition was not caused by an occurrence known to the operator. Proceed to Test Step 2Test Step 2. CHECK THE SETPOINTS.
View the set points for the following:
Generator current transformer primary winding rating
Generator current transformer secondary winding rating
OvercurrentMake a note of the set points. Refer to the Testing and Adjusting, "Electronic Control Module (Generator Set) - Configure" section. Compare the set points against the default set points of the particular generator set.Expected Result:The setpoints are correct.Results:
OK - The setpoints are correct for your particular genset.Repair: Reset the genset. Resume normal operation and verify that the problem has been corrected.STOP
NOT OK - The setpoints are NOT correct.Repair: Reprogram the setpoints. Reset the genset. Resume normal operation and verify that the problem has been corrected.STOP