Mains Monitoring
Professional Mains Monitoring Across the UK
Ensuring Efficient and Reliable Electrical Supply
Electrical Testing UK & Installations provides professional mains monitoring services to assess the quality and stability of your electrical supply. Our engineers measure voltage, current, and power quality to identify potential issues, improve efficiency, and ensure compliance with UK regulations. Detailed reporting and guidance support proactive maintenance and operational reliability.
Key Features Include
Power Quality Analysis
We measure voltage, current, harmonics, power factor and supply interruptions over an agreed monitoring period, identifying supply quality issues that may be affecting your equipment or energy costs.
Fault Investigation Support
Where unexplained equipment failures, nuisance tripping or operational problems have been attributed to supply quality issues, mains monitoring provides the objective data needed to identify the cause.
Detailed Monitoring Reports
Every monitoring programme produces a detailed written report with recorded data, analysis of findings and clear recommendations for any remedial action required.
Remedial Work Available
Where monitoring identifies issues that can be addressed through surge protection, power factor correction or harmonic mitigation, Electrical Testing UK can carry out the remedial work directly.
Industrial and Commercial Coverage
We carry out mains monitoring for manufacturers, data centres, healthcare facilities, retail premises and any commercial or industrial operator where supply quality is critical to operations.
Mains Monitoring and Power Quality Analysis Services
Power Quality Monitoring for Manufacturing and Industrial Sites Voltage dips, harmonics and transients can trip drives, overheat transformers and damage control systems. We install power quality analysers at the incoming supply and critical distribution points, monitor across all operational conditions and produce a report identifying every power quality issue and its likely impact on plant and equipment.
Power Quality Monitoring for Data Centres and IT Infrastructure We carry out power quality monitoring for data centres and server rooms, measuring supply quality against EN 50160 limits and identifying any departures that could compromise equipment reliability or data integrity.
Mains Monitoring for Unexplained Equipment Failures and Nuisance Tripping Where a business is experiencing unexplained equipment failures or nuisance tripping, poor supply quality is frequently the cause. We install monitoring equipment to capture supply conditions at the time of each event, identifying whether the cause lies outside the site, within the installation, or both.
Harmonic Analysis for Commercial and Industrial Premises Non-linear loads including variable speed drives, UPS systems and LED drivers generate harmonic currents that cause overheating, increased energy consumption and equipment interference. We measure total harmonic distortion at the incoming supply and individual load points, recommending mitigation measures where distortion exceeds acceptable limits.
Maximum Demand and Load Profile Monitoring Understanding actual load profiles is essential for managing energy costs and planning additional loads such as EV charging or new production equipment. We record load profiles over an agreed period, capturing maximum demand and load patterns to support informed decisions about supply capacity and energy tariff optimisation.
Installation, Data Collection and Reporting
Installing monitoring equipment at your premises We install calibrated power quality analysers at the agreed monitoring points within your electrical system. For incoming supply monitoring, the analyser is typically installed at the main distribution board. For harmonic surveys or load profiling, additional monitoring points may be required at specific loads or sub-distribution boards. Installation is non-intrusive and does not require isolation of the supply or interruption to operations.
Monitoring period and data collection The monitoring period is agreed in advance based on the nature of the investigation. For general power quality assessments, a minimum of seven days is typically required to capture the full range of operational conditions. For fault investigation, monitoring continues until sufficient events have been captured to enable analysis. The monitoring equipment records all voltage and current parameters continuously throughout the monitoring period, with high-resolution capture of transient events and supply disturbances.
Analysis and reporting On completion of the monitoring period we retrieve the monitoring equipment and analyse the recorded data. The report sets out the measured supply parameters against the limits of EN 50160 and relevant standards, identifies any power quality events or trends of concern, explains the likely causes and consequences of any issues found, and recommends remedial measures with an indication of the expected benefit and cost of each option. Where issues are identified that Electrical Testing UK can address directly, we provide a written quote for the remedial work alongside the monitoring report.
Why Businesses Choose Electrical Testing UK for Mains Monitoring Across the UK
Objective data, not guesswork Mains monitoring provides recorded evidence of supply conditions over time, replacing speculation about the cause of equipment problems with objective data. This protects businesses in disputes with equipment suppliers or the DNO, and ensures that money spent on remedial measures is directed at the actual cause of the problem.
Experience across all types of power quality issues Our engineers understand the full range of power quality phenomena and their effects on different types of electrical equipment and load. We analyse monitoring data in the context of your specific installation and operations, not against a generic template.
Monitoring and remedial work under one contract Where monitoring identifies problems that can be resolved through surge protection, power factor correction, harmonic filtering or distribution system modifications, Electrical Testing UK carries out the remedial work directly, providing continuity from problem identification to resolution.
Clear reports that support business decisions Our monitoring reports are written to be understood by facilities managers, operations directors and financial decision-makers, not just electrical engineers. Findings and recommendations are presented clearly, with the commercial implications of each identified issue explained alongside the technical detail.
Qualified engineers, not subcontractors All mains monitoring installation, data analysis and report writing is carried out by our own qualified engineers. We do not subcontract monitoring projects, so you get consistent quality and direct accountability throughout.
Our Work
Mains Monitoring
Electrical Testing UK carries out mains monitoring and power quality analysis for manufacturers, data centres, healthcare facilities and commercial operators across the UK, providing the objective supply data that businesses need to protect equipment, reduce energy costs and resolve unexplained operational problems.
National Coverage
We are a local Lincolnshire business, but with satellite offices in Peterborough, Cambridge, Nottingham and Enfield, no matter where you’re based in the UK, we can help. Just give us a call or drop us an email.
