TLDR
The crane manufacturer (Liebherr, Potain, Comansa, Wolffkran) tells you what the crane is doing. Spine tells you what the site is feeding the crane. These are different questions, and only the second one answers premature motor failure, voltage sag, rental cost allocation and earth-leakage detection. OEM telematics stops at the crane’s terminal block. Spine starts where OEM telematics ends.
This article explains why supply-side electrical monitoring is the forgotten metric on a tower crane site, and how Spine complements (not replaces) OEM telemetry on large construction projects.
What does tower crane remote monitoring mean in 2026?
Remote monitoring on a tower crane site has two layers that buyers routinely conflate. The mechanical layer comes from the crane OEM and covers load, wind, angle, height and maintenance intervals. The electrical layer comes from the distribution side and covers voltage, current, energy, runtime and earth leakage.
For a UK or EU main contractor, the difference between these two layers is money. The mechanical layer keeps the lift safe. The electrical layer determines whether you are paying for the energy the crane actually used, whether the supply is degrading the motors, and whether a fault on the site board will set the distribution centre on fire before anyone notices.
A typical example: a fire in an electrical distribution centre caused by a loose cable connection that overheats. If the feed for a tower crane is nearby, the damage can be significant. Thermal rise, voltage faults and earth-leakage on a crane’s feed are events that no crane OEM telematics system sees, and they are exactly the gap supply-side electrical monitoring fills.
Why does electrical supply quality matter for tower crane safety?
A tower crane is, electrically, three large three-phase motors: hoist, slew and trolley. Inrush current at start-up is several multiples of running load, and the motors are sensitive to voltage variation. When voltage sags, the motor pulls more current to compensate, and it runs hotter.
Research data is unambiguous: roughly 50 % of overhead crane accidents involve an electrical hazard (NY Engineers, 2023). Most of those are supply-side problems: voltage sag, phase imbalance, earth leakage, overload. None are visible on the operator’s display until the motor is already damaged or the controller has started to behave erratically.
Manufacturer guidance is consistent. Tower crane motor maintenance procedures require monitoring of input and output voltage as standard practice (CPTC, 2024). On most sites this is not done, because it requires an independent monitoring layer the crane OEMs do not supply.
What does Spine measure on the crane’s electrical feed?
Spine installs in the worksite distribution board, not on the crane itself. The sensors clamp around the busbar feeding the tower crane. No patented OEM component is touched, no coordination with the crane manufacturer is required, and no warranty is voided.
Measurement points:
| Quantity | What it tells you | Alarm threshold |
|---|---|---|
| Voltage per phase | Over- and under-voltage, phase fault | ±10 % of nominal |
| Current per phase | Inrush peak, overload, phase imbalance | Configurable |
| Active power (kW) and energy (kWh) | Basis for rental billing, accurate measurement (MID stamp as an add-on) | None (data point) |
| Effective on-load runtime hours | Separates idle time from productive lifting | None (data point) |
| Distribution board temperature | Loose connections, thermal runaway | Configurable |
| Earth leakage current (RCD-style) | Earth fault, insulation breakdown, moisture | 30 mA / 300 mA / custom |
Data is transmitted in real time over 4G to the Spine cloud platform. Spine measures consumption as standard, and the standard measurement is accurate but not MID-approved. MID-approved (billable) measurement is a separate add-on, required if the kWh data needs to be billable under EU Directive 2014/32/EU. Without the MID add-on, Spine’s consumption data is still accurate, but it cannot be invoiced as metered energy to the end customer.
Spine vs crane OEM telemetry vs nothing
This is the table site managers ask for in the first 30 seconds of any meeting. Each column answers a different question, and all three are real.
| What I want to know | Spine (electrical supply) | Crane OEM (Liebherr LiDAT, Potain CONNECT, Comansa Crane Mate, Wolffkran) | Neither |
|---|---|---|---|
| What is the crane’s load right now? | No | Yes | No |
| Wind speed / crane tilt | No | Yes | No |
| Operating hours (mechanical, OEM count) | No | Yes | No |
| Operating hours from the electrical side (billable) | Yes | Partial | No |
| Voltage quality (sag, swell, phase imbalance) | Yes | No | No |
| Inrush current and three-phase imbalance | Yes | No | No |
| Earth-leakage in the distribution board | Yes | No | No |
| Distribution board temperature | Yes | No | No |
| kWh per crane (MID-billable as an option) | Yes | Some, not MID-grade | No |
| Vendor-independent (one platform, multiple crane brands) | Yes | No | No |
Practical conclusion: if a site has one crane from one OEM, the OEM’s platform covers the mechanical layer. As soon as the site has multiple cranes from different manufacturers or hire fleets, which is the normal case on any project of meaningful size, a unified view requires a vendor-neutral supply-side layer. That is what Spine provides.
Use case 1: Hospital and infrastructure builds
A major hospital or infrastructure project runs 24 to 48 months, with cranes added, swapped and relocated through that window. On a large site, the build often runs 24/7. A supply fault on a tower crane at 03:00 cannot wait for the morning shift.
Tower crane utilisation is typically just over 60 %, with mean daily runtime of 9.44 hours (MDPI Buildings, 2021). The remainder is idle time. The motors are off, but the distribution board is still feeding control electronics, cab heaters and lighting. That idle draw shows up on the electricity bill and is invisible to the crane OEM’s telematics.
Spine’s real-time consumption profile separates active lifting from idle standby. The main contractor sees exactly what proportion of the crane’s electricity cost is productive, which makes sub-contractor allocation straightforward.
Use case 2: Hire fleets and itemised billing
Crane hire is moving to itemised invoicing. In the early 2020s, fuel, inspection and maintenance were bundled into the hourly rate; in 2026 they are separate line items (Erlinger Crane, 2025; Equipr Software, 2025).
Hire fleets are moving in the same direction. Spine gives them a metering basis they can write into a hire contract: actual energy in kWh times the rate, plus an idle-time hourly charge.
What Spine changes in practice:
- MID-stamped kWh data = the invoice shows energy used, not estimated.
- Active vs idle separation = the hourly rate can be split into two categories without manual operator entry.
- Earth-leakage and voltage anomaly logs = when a crane fails on site, the hire company can show conclusively whether the failure originated in their fleet or in the site’s supply. Each long-boom motor rebuild runs into five-figure costs, so this evidence carries direct contractual weight.
Use case 3: Shipyards and specialist construction
A shipyard’s primary lifting plant is often heavy gantry and overhead cranes rather than tower cranes. Spine’s electrical supply monitoring works on the same logic regardless of crane type (gantry, tower or mobile), because the measurement point is the distribution board, not the crane.
In a shipyard, two factors are amplified. Rated power per lift is much higher (larger motors, larger inrush currents), and the distribution boards run in damper conditions than a typical dryland build. Detecting earth leakage before it causes a fault is both a safety and a cost question: an unplanned outage of a few hours costs more than the Spine deployment.
What Spine does not do
Spine does not replace crane OEM telemetry and does not try to. It does not tell you load weight, wind speed, crane tilt, cab temperature or controller state. For those, the answer is Liebherr’s LiDAT, Potain’s CONNECT, Comansa’s Crane Mate or Wolffkran’s control system.
Spine answers the part of the tower-crane information requirement that OEM telematics does not cover. Together they give a complete picture; either alone leaves a blind spot.
Deployment
Installation is low-impact. Sensors attach to the distribution board feeding the crane, not to any crane cabinet:
- No coordination with the crane OEM
- No effect on the crane’s warranty
- Installation per board is quick and light
- The unit moves between sites with the board change-over
- 4G connectivity is built in, so no site WiFi is required
Data flows to the Spine cloud platform. The most common way to use it is the Spine dashboard plus automated email or SMS alerts.
What does this give site management for reporting?
This is the part that matters under CSRD. Listed companies and their main subcontractors are being asked for increasingly granular Scope 1 (diesel) and Scope 2 (purchased electricity) data. A single “total site consumption” figure is no longer enough.
Spine’s kWh per crane per month answers the requirement directly. With the MID add-on, the same data is good for both the invoice and the regulatory report, with no separate verification step.
Frequently asked questions
1. Does Spine work even if the crane is a Liebherr, Potain or Comansa?
Yes. Spine installs in the distribution board, not on the crane. No OEM component or system is altered. Spine is vendor-neutral and complements the OEM’s own telematics.
2. Does Spine measure load weight or wind speed?
No. Load weight, wind speed, angle, height and tilt come from the crane’s own system. Spine measures the supply side: voltage, current, energy, runtime, temperature and earth leakage. The two systems answer different questions.
3. Can I use Spine as the basis for a hire contract?
Yes, with the MID add-on installed. Without MID, Spine’s kWh data is accurate but not billable energy under EU Directive 2014/32/EU. Adding an MID-stamped meter alongside Spine is a straightforward upgrade.
4. What if the site has multiple cranes from different manufacturers?
One platform sees every crane fed through a Spine-instrumented board, regardless of manufacturer. OEM platforms each show only that manufacturer’s cranes.
5. Can Spine be moved from one site to another?
Yes. The unit is designed for redeployment. The distribution-board installation is removed quickly and the same unit is fitted at the next site. This is a distinctive Spine feature compared with permanently installed building-side power monitoring systems.
Related reading
- The Spine system: product page
- HUS Bridge Hospital: SRV case study
- Generator load management in practice
- Worksite distribution-board remote monitoring: what to actually measure
- MID metering on a construction site: what billing requires
Summary
Tower crane remote monitoring breaks into two layers. The crane OEM (Liebherr, Potain, Comansa, Wolffkran) tells you what the crane is doing. Spine tells you what the site is feeding it: voltage quality, inrush current, runtime, earth leakage, distribution temperature, kWh.
For an EU or UK contractor running 24/7 hospital builds, multi-crane infrastructure projects or shipyards where an hour of downtime costs five figures, supply-side monitoring is risk management.
Spine does not replace OEM telematics. It fills the OEM’s blind spot with a light installation on the distribution board.