Why MRL is the export default
Removing the machine room reduces building cost, simplifies the architectural interface and cuts on-site installation work. For export projects it also reduces the number of separate crates and the amount of wiring the local installer has to terminate. The trade-off is that the shaft must accommodate the machine, the controller cabinet and the required access clearances — so the GA drawing has to be approved early.
Indicative planning parameters
| Parameter | Indicative range | Note |
|---|---|---|
| Rated load | 630–1250 kg | Selected from building traffic and car size |
| Speed | 1.0 / 1.5 / 1.75 m/s | Drive and controller sized to travel height |
| Stops | 6–16 and above | Landing door and controller I/O schedule |
| Machine position | Top of shaft or side of shaft | Driven by overhead height and structural layout |
| Control cabinet | Integrated near the top landing / shaft | Access and ventilation must be designed in |
| Supply | 3-phase 380 / 415 V 50 Hz or 480 V 60 Hz | Confirmed before production, see voltage guide |
Planning ranges only. Final load, speed and dimensions are fixed in the approved GA drawing and technical agreement.
Electrical configuration is the main export risk
A motor wound for 480 V / 60 Hz behaves differently on a 380 V / 50 Hz network: synchronous speed falls with frequency, cooling fan output changes and the VVVF drive parameters no longer match. For a 16-stop MRL project, a 15 kW and an 18.5 kW machine also imply different cable sizes, protective devices and starting currents. These are engineering decisions made at the quotation stage, not corrections made on site.
Read the power supply & voltage adaptation guide, which covers 480 V → 380 V conversion, 415 V / 50 Hz Gulf standards and motor power selection.
Documentation and handover
Every MRL unit ships with a GA drawing, electrical schematic, terminal wiring diagram, load and function test record, parts list, installation/operation/maintenance manuals and a crate-marked packing list. That file is what a local installation team uses to commission the lift, and it is what a buyer should audit before signing.