Industrial Electrical Failure Analysis

Forensics:

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

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

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