Paynesville City · Monrovia · Liberia
Licensed stock · illustrative
Thermographic monitoring · Structured cabling · Power
A loose connection runs hot for months before it fails. We install the cameras that watch for it continuously — and the cabling, power and backhaul that keep them watching.
Thermal / visual comparator
Synthesized · not a client site
°C
| Spot | Component | Reading |
|---|---|---|
| Sp1 | R-phase terminationreference | 46.2 °C |
| Sp2 | Y-phase termination | 45.1 °C |
| Sp3 | B-phase terminationanomaly | 68.6 °C |
ΔT vs Sp1
22.4°C
Major discrepancy
ΔT against band
axis truncated at 32 °C
02Failure mode
Nothing in a switchroom fails without warming up first. The warning is free, it runs for months, and almost nobody is looking at it.
01
A bolted connection relaxes, or corrodes, or was never torqued properly. Contact area falls. Resistance across the joint climbs.
02
Power wasted in the joint rises with the square of the current — double the load and the heating quadruples. A joint a few milliohms out of spec becomes a heat source.
03
Sustained heat degrades insulation and anneals the conductor. The joint gets worse at shedding heat, so it runs hotter, so it degrades faster.
04
The joint arcs, protection trips, and the outage happens at the worst possible time. The window in which this was a ten-minute repair closed months earlier.
Insulation ageing roughly doubles for every 6 °C of sustained temperature rise at the reference band.
IEEE C57.91 loss-of-life ageing factors: F_AA 1.0000 at 110 °C, 0.5362 at 104 °C, 0.2817 at 98 °C.read at source
A radiometric camera reads surface temperature, not winding hot spot. It flags the condition; it does not replace an oil test.
Around 63% of major transformer failures originate in components that carry a thermal signature — windings 37.7%, bushings 15.9%, on-load tap changers 9.4%.
CIGRE Technical Brochure 642: 964 failures over 167,459 transformer-years, 56 utilities, 21 countries.reported, not verified at source
The same study finds no age-based failure curve. Age alone does not justify replacement — which is precisely the argument for monitoring condition instead.
03The evidence
Each of these carries its source and its limits. A large figure with nothing behind it is the most template-looking thing a contractor can print — and on a tender page it is an unsupported claim set in very big type.
63%
of major transformer failures
CIGRE Technical Brochure 642: 964 failures over 167,459 transformer-years, 56 utilities, 21 countries.The same study finds no age-based failure curve. Age alone does not justify replacement — which is precisely the argument for monitoring condition instead.
1–3°C
opens the first action band
ANSI/NETA MTS-2023, Table 100.18, Section 9.The table classifies by the basis a reading was taken on. Against ambient the same first band opens at 1 °C to 10 °C — quoting one threshold without naming its basis is meaningless.
≤ 12months
typical payback on IR thermography
US DOE FEMP, O&M Best Practices Guide Release 3.0, p.5.4, reporting independent survey averages.The same guide names the costs honestly: diagnostic equipment, staff training, and savings that are not readily visible to management.
41.3 → 27.5%
non-technical losses, cut in two years
LEC Anti-Power Theft Task Force reporting; over 50,000 illegal connections corrected and over 30,000 meters installed.That programme addressed the customer edge — metering and connections. It does not extend to high-voltage substations, generation sites or line corridors, which is a different problem needing a different instrument.
04Severity criteria
Anyone can point a camera and produce an orange picture. An inspection is only auditable if every anomaly is classified against a published band, and the basis it was measured on is recorded alongside it.
Infrared thermography of electrical equipment is required at intervals of 12 months or less, and 6 months or less for equipment in the poorest condition band.
NFPA 70B (2023 edition), which moved from a recommended practice to a standard.read at source
The standard also requires the work be done by a qualified thermographer and the results recorded. An uncertified pass with no record does not discharge it.
| ΔT | Classification | Action |
|---|---|---|
| 1 °C to 3 °C | Possible deficiency | Warrants investigation. |
| 4 °C to 15 °C | Probable deficiency | Repair as time permits. |
| > 15 °C | Major discrepancy← measured reading | Repair immediately. |
05Service register
Five lines of work sharing one physical layer. One contractor across all of it means fewer joints, fewer hand-offs and a single drawing set at the end.
01
Flagship capability
Fixed radiometric cameras on the assets that matter, with temperature thresholds, alarm escalation and a recorded condition history an auditor can read.
6capabilities — open Thermal & Remote Infrastructure Monitoring
02
6capabilities — open Structured Cabling & Fibre
06Handover
The test of an installation is what the next engineer finds when they open the cabinet two years later. These come with the job, not as an extra.
07Next step
Tell us what the site is, what it feeds, and what worries you about it. We walk it, measure it, and come back with a scope you can put in a budget.
