Dometic Marine distributor Seairland Systems is presenting Dometic Marine’s Bypassable Variable Frequency Drive (VFD) for the first time at this year’s Sanctuary Cove International Boat Show. As the first Bypassable VFD available to the marine market, the innovative device represents a clear breakthrough in marine VFD technology and is set to offer extensive benefits to builders and owners including the elimination of electrical and navigation system interference.
Used to smoothly and gently start an air conditioning system’s compressor, VFDs eliminate large current surges that would otherwise interrupt the yacht’s AC power supply. Although providing a significant benefit, standard VFDs also cause harmonic distortion and radio frequency interference (RFI) with electrical and navigation systems and require the installation of line filters and conditioners to eliminate the disturbance.
Easily installed within the yacht’s engine room, Dometic’s Bypassable VFD is electrically connected between the power supply and the air conditioning system’s compressor. Once in operation the innovative device smoothly and gradually increases the compressor’s motor current without any start-up surge.
Unlike standard marine VFDs, once at speed Dometic’s Bypassable VFD is precisely synchronized with the current and then seamlessly bypassed so it is no longer part of the electrical circuit, which eliminates noise and radio frequency interference (RFI). Just before the compressor is turned off, the sophisticated Bypassable VFD is brought back into the circuit to gradually ramp down frequency and voltage and bring the compressor to a smooth stop.
Controlling up to four compressors, Dometic’s Bypassable VFD is especially cost-effective for chillers with two to four stages. Standard VFD technology requires one VFD per compressor. The innovative device also protects the compressor by monitoring input voltage and output current and will shut down if a problem is detected. Its unique digital display allows users to monitor operation and faults.
To find out more about Dometic’s Bypassable Variable Frequency Drive, please visit Seairland at stand 318 during this year’s Sanctuary Cove Boat Show. Alternatively, visit www.dometic.com or watch the product video at www.dometic.com/videos.