Bypass drive for critical loads
The ABB ACH580-BCR-023A-4+B056 is a bypass drive from the ACH580 series, combining a variable-frequency drive with an integrated E-Clipse bypass (+B056 option) in a single enclosure. This order code delivers a 400V-class (-4) bypass drive that lets you run the motor from the VFD for energy savings or switch to full-speed across-the-line operation if the drive faults out — no external bypass contactor or manual transfer switch needed.
What the bypass means for your line
The +B056 E-Clipse bypass option makes this a single unit that handles both VFD and bypass duty. If you're running a fan, pump, or compressor where a drive failure can't stop production, the bypass path keeps the motor running at full speed while you swap the drive module. No separate bypass starter cabinet, no interlock wiring — it's all inside the ACH580-BCR chassis. The 400V class (-4) covers 380-480V nominal systems, so it lands on a standard 480V plant bus without a transformer.
