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BSMJcly series cylindrical self-healing low-voltage power capacitors are mainly used in 50Hz or 60Hz electric power systems, to improve power factors and reduce reactive loss, so as to improve the voltage quality. Applicable for conventional local compensation and centralized compensation, the products have small size, light weight and can be installed in any direction. They are ideal accessory products for miniaturization of a variety of sets of equipment and boxtype transformers.