... power transformer is a recognized as energy-saving, environmental protection, ultra-quiet green power transformer.FeatureSaving energy, reducing noiseS13-M RL ... can enjoy the significant economic benefits which S13-M.RL ultra-low-loss transformer produced (16,072 yuan per year).Note ... steel: 45,000 yuan / T, copper: 67, 000 yuan / T. G5-200KVA 20/0.433KV S13-M.RL 3 phase new ...