TLD offers a complete line of 400 hertz GPUs ranging from 28.5VDC regional GPUs to 180KVA large commercial GPUs. The brain of the unit is a fully electronic generator control module (GCM) which regulates output voltage, protects against OV, UV, OF, UF and OL, and has an integrated display. This makes the TLD GPU a simple piece of machinery. The frame is galvanized and the sheet metal panels are powder-coated, making the unit completely corrosion resistant.