ELGi CONSERVE aligns output with demand by adjusting motor speed, resulting in a decrease in power consumption corresponding to the lower demand. This assists in removing the constant load-unload cycle and the unnecessary power usage from the energy expenses. A fixed speed compressor functions within a load-unload range of at least 10 PSI around the operating pressure, whereas the ELGi VFD compressor can operate within a 2 PSI band. As compressors do not function above their required working pressure, a significant energy saving of 1% occurs for every 2 PSI decrease in operating pressure. In a constant speed compressor utilizing a star-delta starter, the starting current can be up to three times the full load current (FLC). With ELGi VFD starting, the starting current matches the full load current (FLC). This assists in preventing the use of heavily rated parts such as fuses, MCCB, cable dimensions, generator capacity, isolators, etc. In compressed air systems with varying demand patterns, the return on investment from power savings will be under 12 months.
Keywords
12 months
1 occurs
10 psi
2 psi decrease
2 psi band
stardelta starter
lower demand
power savings
operating pressure
power consumption
loadunload range
energy expenses
starting current
varying demand patterns
starting current matches
required working pressure
unnecessary power usage
significant energy saving
constant loadunload cycle
elgi vfd starting
compressed air systems
heavily rated parts
elgi vfd compressor
