Carbon Cycle Chemical Reactions Involved: Photosynthesis: Air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a by product. During photosynthesis plants use carbon dioxide and produce oxygen.
Similar to shore power for ships, a ground power unit (GPU) may be used to supply electric power for an aircraft on the ground, to sustain interior lighting, ventilation and other requirements before starting of the main engines or the aircraft auxiliary power unit (APU).
â¢ Supports ASCII, SEL LMD, and Modbusâ¢ RTU Protocol. Use the SEL-551 Relay in New Installations and Retrofits for Overcurrent Protection of: â¢ Utility Distribution Feeders - includes reclosing. â¢ Industrial Distribution Feeders - includes connections for a core-balance current transformer.