There are many applications for sinking AC current, such as the prevalent need to regenerate current back to the electrical grid while testing grid-tied inverters. A common DC sink application, among others, is to simulate batteries connected to a bidirectional converter in HEV motor drive systems.
When purchasing an RS or MX series power source, customers can purchase the SNK option to sink only AC current, the SNK-DC option to sink only DC current, or both options for the greatest versatility. Upgrading an existing RS unit can be done by AMETEK, depending on the age of the unit. Consult factory for further details.