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380 500va power voltage regulator products are offered for sale by suppliers on Alibaba.com, of which voltage regulators/stabilizers accounts for 91%. A wide variety of 500va power voltage regulator options are available to you, such as single phase, 3.You can also choose from voltage protector, jiw and stabilized voltage 500va power voltage regulator,as well as from copper, aluminum, and pc 500va power voltage regulator,and whether 500va power voltage regulator is white, or black.