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
