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The Sincro AVR BL4U (155239) voltage regulators are designed for use on 50/60Hz brushless generators. Fuse Protection included in case of missing or wrong connection. Under frequency selection and adjustment. Universal AVR which can be used on most Sincro generators and other brands.
All of our AVRs are field type tested.
The Sincro BL4U is a an updated AVR that replaces all the Sincro BL4 series units.