Thomson Power Systems

FTT

UnclassifiedElectrical

What This Code Means

Load voltage become de-energized; Under frequency; Over frequency; 3 Phase Over Voltage; Phase Sequence mismatch; Phase Rotation mismatch; Voltage Phase Loss; Voltage Unbalance; Utility power failure; Under Frequency; Over Frequency; Phase Sequence error; Phase Rotation error

Possible Causes

  • •Primary power source failure
  • •Utility or Generator source frequency instability
  • •Utility or Generator source voltage exceeds safe limits
  • •Inconsistent phase rotation between Utility and Generator sources
  • •Loss of a phase or uneven voltage distribution on power sources
  • •Loss of utility source
  • •Utility or Generator source instability
  • •Utility Power Fail

Suggested Actions

  1. 1Automatic force transfer to alternate supply
  2. 2Initiate engine start timer
  3. 3Transfer load to generator

Related Thomson Power Systems Fault Codes

LDCATS NOT IN AUTOMAINS FAIL TO CLOSE ALARMFAIL TO EXERCISER ALARMTRANSFER FAILFAIL TO EXERCISER
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