Himoinsa

MINIMUM GENSET FREQUENCY

UnclassifiedElectrical

What This Code Means

Voltage values between genset phases (VG12, VG23, or VG31) are under minimum programmed limits; Frequency generated by the genset is under the minimum programmed frequency limits; No frequency signal detected on the first, second, or third phase; Unexpected engine shutdown; Engine fails to stop; Voltage values between genset phases (VG12, VG23, or VG31) are under the minimum programmed limits; Genset frequency is under the minimum programmed frequency limits; No frequency measurement signal detected on the first-phase, second-phase, or third-phase; Unexpected shutdown of the engine; Engine fails to stop (Stop failure)

Possible Causes

  • •Voltage values drop below limits defined in Thresholds table parameter 3 during the period defined by alarms table parameter 62
  • •Genset frequency values are kept under the minimum programmed limits (Thresholds table parameter 6) during the stabilization time (alarms table parameter 65)
  • •Controller does not detect all engine starting conditions (regulations table parameters 19 to 22) while the engine is running
  • •Engine conditions (regulations table parameters 19 to 22) are not detected 15 seconds after a stop attempt
  • •Genset phase voltage drops below the thresholds defined in Thresholds table parameter 3
  • •Genset frequency values remain below the thresholds defined in Thresholds table parameter 6 during the stabilization time programmed in Alarms table parameter 65
  • •The controller does not detect all engine starting conditions (regulations table parameters 19 to 22) while the engine is running
  • •All engine stop conditions (regulations table parameters 19 to 22) are not detected 15 seconds after an engine stop attempt

Suggested Actions

  1. 1Configure alarm (alarms table parameter 63) to carry out stop with engine cooling
  2. 2Configure alarm (alarms table parameter 66) to carry out stop with engine cooling
  3. 3Disconnect the stop failure alarm (alarms table parameter 70) so the device will consider the engine stopped after waiting the maximum time of 15 seconds
  4. 4Ensure all stopping conditions are detected during the programmed time (alarms table parameter 71) to properly detect engine stop
  5. 5Stop engine with cooling (automatically triggered action configured by alarms table parameter 63)
  6. 6Stop engine with cooling (automatically triggered action configured by alarms table parameter 66)
  7. 7Disconnect the stop failure alarm (alarms table parameter 70) to allow the device to consider the engine stopped after waiting a maximum of 15 seconds
  8. 8Ensure all engine stopping conditions are detected during the programmed time (alarms table parameter 71)

Related Himoinsa Fault Codes

MINIMUM GENSET VOLTAGEOVERLOAD ALARMMAXIMUM GENSET VOLTAGESHORT CIRCUITMAXIMUM GENSET FREQUENCY ALARMSTART FAILURE ALARMMAXIMUM GENSET FREQUENCYSTOP FAILUREINVERSE POWERGENSET VOLTAGE ASYMMETRY ALARMERRONEOUS PHASE SEQUENCE OF THE GENSETEMERGENCY STOP
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