A drive in a cement plant, a crusher house, or an open desert pumping station rarely fails on the day of the storm. It fails months later, and the failure report says something vague: overheating, nuisance trip, board failure.
Work backwards from that and you usually find a chain rather than a cause.
Consider how it can run. The filter loads up. Airflow drops. The heatsink runs hotter, so the drive derates or trips on temperature. To keep production going, the door gets opened. Now the dust the filter was catching reaches the control boards directly, and in humid air it can form a conductive film. Months later, a board fails and the drive gets blamed.
How closely that matches your site depends on your site. What does not vary is where the chain starts. Every link in it follows from having a filter in the air path in the first place.
Figure 1. Two ways to cool a drive in a dusty plant. The left panel is a generic shared-air design; some drives already separate the two paths.
The AT24 UB HP removes that first link. The power components have a dedicated cooling channel, and the sensitive electronics sit in a fully welded, sealed compartment, isolated from environmental exposure.
The enclosure is IP55, the fans are IP55-rated with sealed connections, the doors seal on precision gaskets with sealed cable glands, and the boards carry protective conformal coating on top of that.
Which means there are no air filters at all. Nothing to inspect, nothing to clean, nothing to replace, and no failure mode where a clogged filter takes down the drive.
The maintenance you stop scheduling
The second recurring task is quieter and more expensive. Standard electrolytic capacitors are a wear item, generally replaced around the five-year mark.
The AT24 UB HP uses polypropylene capacitors exclusively, rated to run for the full product lifecycle, and they need no reforming after long storage or an extended shutdown.
For a spare unit sitting in a warehouse on a remote site, that last point matters more than it sounds.
Figure 2. What the first five years cost you.
Built for outdoors, not just for indoors with a shelter
Traditionally, putting a drive outside means adding to it: a protective enclosure, a shelter, derating, remote mounting, longer cable runs, or separate indoor and outdoor configurations.
The AT24 UB HP is specified for indoor or outdoor placement as it is.
- Powder-coated finish that resists UV and harsh conditions.
- Cabinet colour chosen to reduce heat absorption from direct sun.
- Stainless-steel external fasteners so the hardware does not corrode before the drive does.
- Membrane vent that drains condensate and keeps the interior dry.
- Mounting base for free-standing installation where wall mounting is impractical, supplied as standard on 280 to 400 kW models and available as an option on 132 to 250 kW.
It runs from -10 to +40°C with no derating, and up to +50°C with derating.
Configuration without opening the enclosure
A sealed cabinet is only an advantage if nobody has to open it.
The AT24 UB HP is configured either from the front control panel or over built-in Wi-Fi: connect in under 10 seconds, then work through a guided setup wizard.
The control panel can also be mounted separately, up to 10 metres away, so the operator interface can live somewhere convenient while the drive sits where the motor is.
| Parameter | Value |
|---|
| Power range | 18 to 400 kW |
| AC supply voltage | 380 to 480 V (-15% to +10%) |
| Enclosure | IP55, welded and sealed |
| Placement | Indoor or outdoor |
| Operating temperature | -10 to +40°C without derating; up to +50°C with derating |
| Overload | Normal duty 120% for 60 s; heavy duty 150% for 60 s |
| Output frequency | 0 to 600 Hz |
| Motor control | Scalar V/f (5 points), open-loop and closed-loop vector |
| EMC | Category C3 per IEC/EN 61800-3 |
| Communication | RS-485 Modbus RTU and built-in Wi-Fi web interface |
| Standard I/O | 5 DI, 1 DO, 2 relay outputs, 2 AI, 1 AO |
| Mounting | Wall or free-standing on the integrated base |
Pumps, HVAC, exhaust and filtration units, compressors, conveyors, crushers, mixers: if the equipment lives somewhere the maintenance crew would rather not visit every month, that is the case for this platform.
Running drives in a dusty, humid or outdoor installation and tired of filter schedules? Send us the motor rating, the ambient conditions and the mounting constraint, and we will size the AT24 UB HP for it.
Request a quotation or a site assessment for the AT24 UB HP.
