The ABB ACH550-01 AC drive combines a sophisticated microprocessor with an advanced IGBT power switching technology to deliver a full featured drive in an extremely compact design. The ACH550-01 is a highly efficient and dependable (PWM) drive with features designed for harmonic reductions specifically for the HVAC industry.

Drives and other non-linear load equipment contribute to harmonic currents in a power distribution system.  In buildings it is important to limit harmonics as harmonic distortion is a form of electrical pollution affecting the quality of the electrical power and meeting distributed on the public network. Building services applications face particular challenges in preventing their effects and meeting Electrical Regulation G5/4.

Lower Line Harmonics with a Swinging Choke

To reduce harmonic distortion, ACH 550 drives have a unique, built-in harmonic limiting device, a swinging choke. The swinging choke is an inductor that has an inductance value that is inversely proportional to its operating current.  Swinging Choke drives offer a number of advantages:

– By cutting harmonics emissions by up to 25 percent.

– Limiting harmonics as effectively as a 5% linear choke but in a smaller space in the drive

– Are a built-in component requiring no extra equipment to purchase, mount and wire

– Highly efficiency devices offering minimal power loss

– Configured as a 3-phase input reactor or dual DC bus choke for added impedance

– Contributes to electromagnetic compatibility and transient voltage protection

–  Avoid any need to oversize branch circuit wiring as they ensure the drive’s input current will never exceed the output current supplied to the motor.

The ACH550 conforms to the European Union Electromagnetic Compatibility (EMC) directive and meets the other requirements that allow it to carry the CE marking.

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