Liebert GXT4, 500-10,000VA

ASCO Three-Source Systems are similar to ASCO Two-Source Systems except that a second alternate power source is added to back up the first if that power source fails. Upon the loss of the utility power source, the system provides all necessary controls to start both alternate power sources.​

  • Control logic for selecting between the alternative power sources.
  • Normal, emergency, and/or load circuit breakers.
  • Protective relaying (as required).
  • Optional instrument meters for normal, emergency, or load for local monitoring.
  • Designs are based on NEMA and UL 891 standards.
  • Optional engine start control logic and/or load control logic.
  • Available up through 4000 amperes using ASCO 7000 series automatic transfer switches. 7ATS, 7ATB, 7ACTS and 7ACTB.