Forensics: Industrial Electrical Failure Analysis

Practical Engineering Ltd. has lead numerous investigations into protection mis-operations and damaged industrial equipment,
  • Protective Relay Event File Review
  • Power and/or Control System Review
  • Data Historian Trend and Alarm History Review
  • Root Cause Analysis
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Sampling of Past Investigations:

Incident:
Spillway gate inadvertent operation
Root Cause:
Encoder roll-over

Incident:
Transient over-voltage failure of multiple VFDs
Root Cause:
Re-striking ground fault

Incident:
Substation fire
Root Cause:
Battery charger failure

Incident:
Mill-wide blackout
Root Cause:
Reversed CT wiring in restricted earth fault circuit