Root Cause Analysis
Expert investigation services to identify the underlying causes of power system failures and disturbances.
Electrical root cause analysis, defensible in writing
When equipment fails, faults trip, or a system disturbance hits the bus, the question is never just “what broke?” It is “what actually caused it, what else could it cause, and can we prove it to the insurer?” ClarkTE forensic investigations answer all three.
What electrical root cause analysis actually involves
Electrical root cause analysis (RCA) is the structured investigation that follows an unplanned event — a transformer that ruptured, a feeder that reclosed three times before lockout, a motor that burned out a bearing while drawing balanced current. Done right, RCA establishes the proximate cause (the device that initiated the failure), the contributing causes (the conditions that allowed it), and the systemic causes (the maintenance, design, or training gap that produced those conditions).
ClarkTE’s forensic process pulls relay event records, oscillography, SCADA logs, sequence-of-events recordings, and thermography from the affected window. We pair the data with site interviews, OEM design review, and physical inspection (or laboratory analysis on the failed component when warranted). Reports are PE-stamped, lead with findings ranked by certainty, and hold up under OEM warranty review, AHJ inquiry, and insurance claim adjudication.
Fault Investigations
Comprehensive analysis of power system faults to determine causes, impacts, and preventive measures for future protection.
Applications:
- Transmission and distribution line faults
- Substation equipment failures
- Protection system misoperations
- Circuit breaker malfunctions
- Recloser and protection device coordination issues
- Transient and temporary fault pattern analysis
Key Benefits:
- Accurate identification of fault causes
- Development of targeted corrective actions
- Prevention of recurring issues
- Improved system reliability metrics
- Enhanced protection system performance
- Reduced outage frequency and duration
Equipment Failures
Detailed investigation and analysis of electrical equipment failures to determine root causes, failure mechanisms, and contributing factors.
Applications:
- Power transformers
- Circuit breakers and switchgear
- Cables and terminations
- Control and protection relays
- Power electronic devices
- Motors and generators
Key Benefits:
- Determination of exact failure mechanisms
- Evidence-based maintenance program improvements
- Identification of design or manufacturing defects
- Development of fleet-wide mitigation strategies
- Support for warranty and insurance claims
- Prevention of similar failures across systems
System Disturbances
Analysis of power quality events, transients, and system-wide disturbances to identify causal factors and develop mitigation strategies.
Applications:
- Voltage sag and swell events
- Harmonic distortion issues
- Switching transients
- Power factor problems
- Load-induced disturbances
- Integration challenges with renewable sources
Key Benefits:
- Comprehensive understanding of disturbance propagation
- Effective power quality improvement measures
- Reduced equipment damage from power quality issues
- Prevention of nuisance tripping
- Improved system stability and reliability
- Enhanced performance of sensitive equipment
Our Analysis Methodology
Data Collection
We gather all available evidence, including relay logs, SCADA data, physical evidence, witness accounts, and historical records.
Analysis
Our experts conduct detailed analysis using specialized software, laboratory testing, and methodical investigation techniques.
Root Cause Identification
We determine the primary cause and contributing factors using proven methodologies like 5-Why, fault tree analysis, and cause-effect mapping.
Recommendations
We deliver actionable recommendations to address immediate issues and prevent future occurrences, with clear implementation guidance.
Success Stories
Transformer Failure Investigation
Conducted comprehensive forensic analysis of a failed 138/13.8kV power transformer at a critical industrial facility that experienced a catastrophic failure.
Results:
Identified manufacturing defect in tap changer mechanism that caused internal arcing. Analysis led to inspection of similar units across client's system, preventing three potential similar failures and saving an estimated $2.3 million in downtime costs.
Distribution System Fault Pattern Analysis
Performed detailed investigation of recurring momentary faults on rural distribution circuit experiencing frequent customer interruptions despite multiple traditional inspection patrols.
Results:
Utilizing advanced pattern analysis, identified unmarked irrigation equipment operation as the root cause. Implementation of specialized coordination settings reduced momentary interruptions by 78% and improved circuit reliability indices by 65%.
Transform Failures into Future Reliability
Contact our expert analysis team today to discuss how our root cause analysis services can help you identify the true causes of system issues, develop effective solutions, and prevent costly recurrences.
Schedule a Consultation