APC rack power distribution units with measurement functionality ensure optimized energy usage and circuit protection through active data acquisition. Users can individually set alarm thresholds; warnings about potential circuit overloads are displayed in real-time on the device and transmitted to remote systems. These devices provide data on energy consumption, enabling data center managers to make informed decisions about load distribution and proper sizing of IT environments, thereby reducing overall operating costs. The devices come with numerous features and characteristics: active power monitoring, connection for temperature/humidity sensors, IEC outlets with locking mechanisms, and ultra-flat circuit breakers. Configuration is done via a secure web connection or SNMP or Telnet interface.