ABB ACS 1000 variable frequency drives control pumps at the Changi influent pumping station in Singapore
The Changi Water Reclamation Plant in Singapore treats up to 176 million gallons of used water per day. Ten ACS 1000 variable‑speed drives, each rated at 8500 kW (4680 hp), control the pumps in the influent pumping station, where long 11 m motor shafts require soft‑starting to avoid torsional stress.
ABB supplied the ACS 1000 medium‑voltage drives, which act as soft starters and provide precise flow regulation. The drives reduce water‑hammer risk, lower energy consumption, and extend equipment life through smooth start‑stop operation.
| Inverter type | Three‑level Voltage Source Inverter (VSI) |
|---|---|
| Voltage rating | 2.3 kV, 3.3 kV, 4.0 kV, 4.16 kV (optional 6.0‑6.6 kV with transformer) |
| Supported motor type | Induction motor |
| Power rating per drive | 8500 kW (4680 hp) |
Each ACS 1000 drive is rated at 8500 kW (4680 hp).
The ACS 1000 is designed for induction motors.