ABB's ACS 1000 variable speed drive improves process stability and reduces emissions in a petrochemical plant. By controlling the speed of the exhaust fan, the product enhances process stability and reduces NOx emissions.
The document outlines a solution implemented by ABB for Preem Petroleum AB's exhaust fan system at its Gothenburg refinery. By installing an ACS 1000 variable speed drive together with a six‑pole induction motor and a three‑winding transformer, the fan process gained precise speed and torque control, eliminating previous throttling‑valve inaccuracies.
The result was reduced fan downtime, lower greenhouse‑gas emissions, quieter operation (75 dBA), and faster commissioning—completed in three days. Since 1999 the drive has operated without production interruptions, delivering consistent product quality and financial benefits.
| Inverter type | Three-level Voltage Source Inverter (VSI) |
|---|---|
| Rated power | 700 kVA |
| Output voltage range | 2.3 kV – 4.16 kV (optional 6.0 kV – 6.6 kV with step‑up transformer) |
| Maximum output frequency | 66 Hz (optional 82.5 Hz) |
| Motor type | Six‑pole induction motor, 560 kW, 1,172 rpm |
| Noise level | 75 dBA |
The ACS 1000 is rated at 700 kVA.
The drive reduces system noise to 75 dBA.
Commissioning was completed within three days.
It uses a three‑level Voltage Source Inverter (VSI).