Specifying a drive is rarely just "specify a drive." In practice it turns into a small design project: pick the VFD, size an enclosure around it, add a circuit breaker or disconnect switch, decide whether you need a bypass for maintenance windows, sort out metering, coordinate emergency-stop wiring with the rest of the panel, and then still have to tune it for whatever the drive is actually running - a pump, an air handler, a cooling tower fan. Each of those decisions is small, but together they add design time and hand off risk to whoever assembles the pieces.
AT24 SD-UB collapses that project into a single part number. It's the AT24 UB platform, factory-built into an installation-ready cabinet, with the switching, metering, safety, and climate-control options engineered in from the start - and application software already tuned for pump and HVAC duty.
An all-in-one system tailored for rapid integration - designed to streamline deployment, it ensures seamless compatibility and saves time for industries that value efficiency and precision.
Key specifications
Table 1. AT24 SD-UB - key specifications.
What you're not designing from scratch
The value of a cabinet system isn't the sheet metal - it's everything that normally has to be specified, sourced, and coordinated separately when you start from a bare drive.
Table 2. Engineering a system yourself vs. ordering AT24 SD-UB as a complete unit.
Every option in that right-hand column is selected at order time through the AT24 SD-UB symbol structure - circuit breaker, power analyzer, disconnecting switch, contactor, fuses, VFD bypass, even a configuration for two motors from one cabinet. You choose the combination; Triol engineers and tests it as one unit.
Sized to the job, not oversized by default
The cabinet footprint grows with power in three steps rather than one oversized enclosure for the whole range - a 15 kW pump station doesn't ship in the same footprint as a 400 kW one.
Figure 1. Cabinet width by power band - three frame sizes cover 11 to 500 kW.
Software tuned for the job, not just the motor
Beyond electrical integration, AT24 SD-UB ships with application-specific algorithm packages rather than a generic drive that still needs process tuning:
- Pump package: control logic tuned for pump duty - soft start, continuous nominal-mode operation, and reversing/braking at set rates while maintaining full motor characteristics across the operating frequency range.
- HVAC package: tuned for air handling, exhaust, and building-mechanical loads.
Both packages run on the same three control methods available across the AT24 UB platform - scalar V/f, open-loop vector, and closed-loop vector - so the choice of software package doesn't limit control performance.
Beyond the standard cabinet options
For sites with additional power-quality or protection requirements, further option units can be added without needing extra panel space: EMC filters, DC and input AC chokes, sine-wave filters, braking units and resistors, mains fuses and contactor, dV/dt filters, and passive harmonic filters to meet IEEE 519 THDi limits. All of these mount inside the AT24 SD-UB cabinet - none require a separate enclosure.
Have a pump station or HVAC project that needs a cabinet-ready drive? Send us the motor size, application, and any required options (bypass, metering, disconnect) - we'll return a configured part number.
Request a configuration and quote for AT24 SD-UB.
