A Power Transfer Load Center (PTLC) shows the increasing value of integrating additional electrical devices with a transfer switch. A PTLC integrates a load distribution panel and other devices into a Service Entrance Automatic Transfer Switch (SEATS) to provide connectivity and control for power sources, load transfer equipment, and load circuits from a single location. This design further streamlines the procurement, installation, and operation of electrical equipment to reduce overall installed and lifecycle costs.

Some of the advantages of a PTLC can be seen by comparing the photographs in Figure 6 and Figure 7. Figure 6 shows the electrical equipment typically found near the service entrance. The wall-mounted devices include an ATS, disconnect breakers for the Normal and Emergency power sources, and Surge Protection Devices (SPDs). In Figure 7, six devices are consolidated into a single wall-mount cabinet. This design requires less effort to mount and connect. Integrating six devices eliminates the need for five enclosures, reducing the required wall area by 30 percent.

The device consolidation provided by PTLCs can present important benefits for any facility with limited available space. For instance, PTLCs are commonly selected for Mobile Telephone Switching Offices (cell sites). They are also suited for space-limited facilities that will be replicated at multiple locations, such as franchised fast-food restaurants, convenience stores, and fueling stations. For the latter, PTLCs can form part of a cost-effective backup power solution that enables these businesses to supply needed fuel to customers during post-storm utility power outages. With the emergence of connected Internet-of-Things applications, a SEATS/PTLC solution could be standardized for multiple edge computing facilities.

Published for:ASCO Power Technologies USA