One visit, three disciplines: calibrated thermal imaging, EN 61000-4-30 power-quality logging and AI-assisted evidence capture — carried out while your site stays fully operational. No shutdown, no lost picks, no dark racks. We surface the loose joint, the harmonic problem and the failing asset before any of them takes the floor down.
Every Live Operational Survey™ combines thermography, power-quality logging and evidence capture, each carried out under load and reported against the standards your insurer and duty-holder obligations are held to.
The European standard for infrared detection of thermal irregularities — the qualitative method the thermal element of our survey follows.
Thermography principles for condition monitoring and diagnostics of machines and electrical assets.
Class A measurement methods for harmonics (THD), sags, swells, flicker, unbalance and transients logged over a monitoring period.
Defines the voltage limits public supply must meet, so logged results are graded against a recognised pass/fail envelope.
Reg 4(2) requires fixed systems be maintained to prevent danger — a live survey is recognised predictive maintenance evidence.
Major property insurers require or credit periodic infrared and power-quality surveys of electrical distribution equipment.
Thermal, power-quality and asset findings are graded on one combined priority scale — by temperature rise above reference (delta-T), by deviation from the EN 50160 envelope and by criticality — so you know what needs attention now and what can be scheduled.
Critical — ΔT above 40°C or breach of EN 50160 limits, immediate action
Serious — ΔT 15–40°C or sustained high THD, repair at earliest opportunity
Intermediate — ΔT 5–15°C or borderline unbalance, monitor and schedule
Minor — ΔT under 5°C or occasional transient, note for next survey
Reference load and power-quality window recorded so readings stay comparable
No anomalies — thermal and power-quality baseline logged for future comparison
The Live Operational Survey™ is designed around continuity — every discipline runs under live load so distribution, automation and cold chain keep running throughout.
Conveyor drives, sortation MCCs and yard supplies surveyed live under peak flow
Racking power, mezzanine boards and charging bays imaged and logged hot
Incoming switchgear and dock-leveller circuits scanned under duty load
UPS, PDUs and critical distribution surveyed live with no downtime
Refrigeration plant, condensers and control panels imaged under continuous duty
Process-critical panels and drives surveyed to satisfy property insurers
Chilled and ambient distribution centres surveyed around trading peaks
Standby, essential-supply and comms-room distribution scanned live
Thermal drift and power-quality problems build gradually and repeatably — the best value comes from surveying on a schedule and comparing against a baseline. Pick the level of cover that fits your risk.
A combined thermal, power-quality and evidence survey of your main distribution, carried out live in a single visit.
Scheduled recurring survey plus continuous baseline tracking, so year-on-year drift and power-quality creep are caught early.
Programme survey with P1 and P2 remedial work built in — re-torque, re-terminate, rebalance and re-survey.
Scoped to your switchroom count, PDU count and number of sites across the portfolio.
A representative sample of recent live operational surveys. Full case studies and references available on request.
Live scan of the sortation switchroom found a P1 busbar joint 51°C above reference; power-quality log flagged high THD from the drives.
Full survey of critical distribution carried out live with zero downtime; two P2 terminations and a neutral unbalance flagged.
Compressor panels and dock circuits scanned under duty; power-quality log showed voltage dips tripping condenser fans.
Intake panel imaged under peak flow with a 7-day power-quality log; a harmonic-driven neutral heating issue identified.
Forklift charging bank and racking boards surveyed live; AI-assisted asset register rebuilt from unlabelled panels.
Compressor and condenser control panels scanned under continuous duty; a loose contactor terminal caught at P2.
Standby and comms-room boards surveyed live with no interruption; power-quality confirmed clean transfer to standby.
Motor control centre scanned under production load; a hot P2 overload relay and drive-side flicker identified.
Annual combined survey to satisfy an FM Global property policy; three P3 items scheduled and a transient source located.
Representative examples — site names withheld for client confidentiality. Ask for references relevant to your sector.
Competent-person surveyors across London and the South East, with every survey report logged to your compliance record wherever your sites are.
Programmes above are cheaper over time — but every element of the survey is also available as a one-off, fixed price upfront.
| Service | Standard | From |
|---|---|---|
| Live Operational Survey™ | ||
| Single-site combined survey (thermal + power quality) | BS EN 13187 | £680 |
| Main switchroom / LV panel thermal scan | ISO 18434 | £420 |
| Data centre PDU / UPS suite (per row) | ISO 18434 | £380 |
| Additional distribution board on same visit (each) | BS EN 13187 | £95 |
| Power-Quality Monitoring | ||
| 7-day logged survey (per point) | BS EN 61000-4-30 | £320 |
| Harmonic (THD) & unbalance analysis | EN 50160 | £180 |
| Extended 30-day monitoring window | BS EN 61000-4-30 | £640 |
| Out-of-hours / weekend survey surcharge | — | £120 |
| Reporting & Evidence | ||
| AI-assisted asset register & photo log | Included | Included |
| Insurer evidence pack (FM Global / RSA) | Insurer format | £65 |
| Baseline comparison report (repeat survey) | ISO 18434 | £55 |
| Remedial Work | ||
| P1 hot spot — made safe (per item, same visit) | BS 7671 | £55 |
| Re-termination / re-torque (per connection) | BS 7671 | £45 |
| Post-repair confirmation re-survey | BS EN 13187 | £85 |
| Estate / multi-site survey programme | ISO 18434 | Custom quote |
Single-site surveys — book a live slot instantly. Switchrooms, data centres and multi-site programmes — send an enquiry and we'll come back with a fixed quote.
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We reply within one working day. For anything urgent, call 0203 908 4790.
No — the whole point is zero downtime. Thermal imaging must be done with the installation live and under normal load, and power-quality logging only produces meaningful data while the site is trading. We work around your operation, needing only covers removed for a clear line of sight, which we arrange with your maintenance team. Picks keep happening and racks stay powered throughout.
We install a logger to BS EN 61000-4-30 for a monitoring period — typically seven days — and capture harmonics (total harmonic distortion), voltage sags and dips, swells, flicker, phase unbalance and transients. Results are graded against the EN 50160 supply-voltage envelope, so you get a clear pass/fail picture and the source of any disturbance affecting drives, refrigeration or IT loads.
Alongside the survey we photograph and tag every board, panel and asset, then use assisted tooling to rebuild or verify your asset register, match thermal images to circuits and flag anomalies for the reporting engineer to confirm. It speeds up reporting and gives you a searchable, dated evidence record — but every finding is reviewed and signed off by a competent person, not left to software.
Yes. The thermal element is reported to BS EN 13187 and ISO 18434 principles using radiometric cameras on a traceable calibration schedule, and the power-quality element to BS EN 61000-4-30. That is the format major property insurers such as FM Global, RSA and Zurich require or credit, and we issue the evidence pack in their preferred layout.
They are complementary. An EICR is a periodic inspection and test of the fixed installation coded to BS 7671; a Live Operational Survey™ is predictive maintenance run under live load — thermography, power quality and evidence capture — that finds developing faults between inspections without any shutdown. Our findings feed directly into remedial work coded against BS 7671.