Greencisco 50Hz,60Hz,400Hz Naval frequency converters from 10KVA to 16MVA are with 20 years life, with voltage:380VAC/400VAC/415VAC/440VAC/690VAC/10KV/11KV/13.8KV, with parallel function and RS485 communication functions, indoor type, IP65 outdoor type, widely used for navy, warship,gun boat, submarine, port,dock, shipyard,oil and factories,ect.