Overview
Red Current Ltd, a leading provider of thermographic inspection services, was recently contracted to perform a routine thermal imaging survey for a Purpose-Built Student Accommodation (PBSA). The survey revealed a critical issue - a loose connection on the Main Neutral Busbar in a 3-phase distribution board supplying multiple consumer units to student rooms. By identifying this fault early, Red Current Ltd averted potentially disastrous consequences, ensuring the safety, reliability, and continued operation of the facility.
Background
The PBSA in question housed over 200 students, with each room relying on a dependable power supply for essential services such as lighting, heating, internet connectivity, and appliance use. The distribution board acted as the central hub for electrical supply, feeding multiple consumer units that served individual
Routine thermographic inspections are a cornerstone of the PBSA's preventive maintenance strategy. Red Current Ltd was tasked with conducting one such inspection to identify any signs of overheating, electrical faults, or inefficiencies in the system. The project aimed not only to maintain compliance with safety standards but also to ensure uninterrupted service for the residents.
Click image to open case study as PDF
The Discovery
During the thermal imaging survey, Red Current Ltd's thermographers noticed unusual heat patterns in the distribution board. Specifically, one area showed an elevated temperature considered anomalous for the type of component at the prevailing loading conditions. A closer analysis pinpointed the source of the heat to a loose connection within the main neutral busbar assembly. Loose connections are often invisible to the naked eye but can result in significant heat buildup due to increased electrical resistance. If left unaddressed, this condition could have escalated into more severe issues, including voltage imbalances, equipment damage, fire hazards, and potential electric shock risks.
Defect Report Page
Risk Assessment
The implications of a loose neutral connection are far-reaching, particularly in the context of a PBSA:
Voltage Imbalance: In a 3-phase system, the neutral conductor plays a vital role in balancing voltages across the phases. A loose neutral connection can lead to unpredictable voltage fluctuations, with some rooms experiencing dangerously high voltages and others suffering from insufficient supply. This could have damaged electronic devices commonly used by students, such as computers, TVs, and kitchen appliances.
Fire Hazard: Heat generated by a loose connection can ignite surrounding materials, posing a severe fire risk. In the densely populated environment of a PBSA, this could have led to catastrophic consequences, endangering lives and property.
Disruption to Services: Power instability caused by the loose neutral would likely have tripped circuit breakers and impaired safety devices like RCDs, leading to frequent outages. This disruption could have affected essential services, creating significant inconvenience for the residents.
Compliance and Liability: Electrical faults of this nature could have rendered the PBSA non-compliant with safety regulations, exposing the property managers to legal and financial liabilities.
Red Current Ltd's thermal imaging survey proved invaluable in identifying the issue before any of these risks materialised.
Red Current's Unique Survey & Reporting Process Provided The Critical Observations.
This case study highlights how Red Current's meticulous approach played a crucial role in preventing what could have been a 'major event'. It is founded upon our commitment to training, development and an on-going innovation cycle.
Training: All thermographers are fully trained to a minimum of PCN/ITC Level 1 (ISO 18436) and follow a structured development plan progressing towards PCN/ITC Level 3.
Standardised Processes: We have developed a set of standardised processes to ensure meticulous asset inspections, achieving consistency, accuracy, reliability and repeatability of the reported results.
Peer Reviews: Every report is reviewed by a Senior Surveyor to ensure standards are followed and no anomalies are missed.
Professional Development: We operate a continuous learning and resource sharing process. Our survey review and internal verification procedures identify improvements before a report is distributed, ensuring any misdiagnosed anomalies, adjustments or additional insights are shared with the team so each surveyor is constantly refining their expertise.
Continuous Innovation: Regular analysis of survey outcomes allows us to identify trends and refine Red Current’s survey and reporting processes, ensuring we deliver the highest standards of service.
Highest Quality 'On Site' Survey Practices
Red Current's 'on-site' thermal imaging survey process is designed to be comprehensive, efficient, and non-intrusive. This ensures:
- No customer equipment is switched off during the survey, allowing operations to continue without interruption.
- We use the most advanced thermal imaging equipment available - so the resolution and image quality is the highest standard.
- Our surveyors meticulously inspect each asset throughout the installation - capturing images regardless of whether anomalies are present
With a large number of the highest quality images, our surveyors (and their peers) then have the training, systems, processes and QA checks to ensure we find the issues for our clients.
Action Taken
Following the discovery, Red Current Ltd promptly reported the issue to the property management team. The loose neutral connection was flagged as a critical fault requiring immediate intervention. A team of qualified electricians were mobilised to rectify the issue. The corrective action involved:
- Replacing and reassembling the busbar assembly to ensure a stable connection.
- Rechecking all other terminations in the distribution board for potential issues.
- Conducting a follow-up thermal imaging survey to confirm that the repair had resolved the problem.
The Impact
Prevented Equipment Damage: By addressing the fault early, the PBSA avoided overvoltage scenarios that could have damaged students' electronic devices and shared appliances in communal areas.
Enhanced Safety: The repair eliminated the fire hazard posed by the loose connection, ensuring the safety of the residents and the building itself.
Maintained Service Continuity: With the neutral repaired, the distribution board regained its stability, providing consistent power supply to all rooms and communal facilities.
Compliance Achieved: The prompt action ensured that the PBSA continued to meet electrical safety standards, safeguarding its reputation and avoiding legal complications.
Lessons Learned
This case highlighted the critical importance of regular thermographic inspections in preventive maintenance. Key takeaways include:
Early Detection is Key: Thermal imaging allows for the identification of hidden faults that might not be apparent through visual inspections or routine checks.
Comprehensive Risk Management: Addressing electrical issues proactively reduces risks to safety, service continuity, and compliance, particularly in high-density environments like PBSAs.
The Value of Expertise: Red Current Ltd's expertise in thermographic analysis was instrumental in identifying and resolving the fault before it escalated.
Conclusion
Through the use of thermal imaging, Red Current Ltd was able to identify and rectify a potentially catastrophic fault in a PBSA’s electrical system. The intervention not only averted disastrous consequences but also reinforced the value of thermographic inspections as a preventive maintenance tool.
Realising the benefits of electrical thermal imaging requires robust survey and reporting processes that ensure accurate, reliable results and support surveyor development. Red Current is dedicated to industry-leading thermal imaging, with extensive expertise in identifying component failures and defective temperatures.
Thermal imaging continues to prove itself as an indispensable technology for ensuring safety, efficiency, and reliability in electrical systems. Red Current Ltd's commitment to excellence in this field underscores the importance of expertise, precision, and proactive measures in safeguarding modern infrastructure.
Please contact us if you require a sample thermal imaging report or would like to discuss using surveys as a mechanism to ensure robust maintenance management and the prevention of major incidents.
