Hot-selling productsAn enterprise specializing in the production of high and low
voltage complete sets of power transmission and distribution equipment

Derui dry-type transformers adopt epoxy resin vacuum casting technology, with insulation class of F/H and customizable protection class. Selected high magnetic permeability iron cores are used to achieve first-class energy efficiency, featuring energy saving and low noise. The oil-free design ensures safe operation and easy maintenance. Suitable for voltage classes ranging from 3kV to 35kV, these transformers are widely applied in industrial production, urban infrastructure construction and other scenarios.

A transformer is a static electrical device operating on the principle of electromagnetic induction. Its primary functions are to convert alternating current (AC) voltage and current, achieve electrical isolation, and transmit electrical energy efficiently. As a core equipment in the power transmission and distribution segment, transformers are also widely used in industrial production, electronic appliances, and other fields.

A load break switches is a mechanical switching device capable of closing, carrying, and breaking current under normal circuit conditions, as well as withstanding short-circuit current for a specified duration. It is one of the core control and protection devices in medium and low-voltage power distribution systems.

A Ring Main Unit (RMU) is a critical switching device in ring network power supply systems. It refers to the switchgear installed on each distribution branch, whose busbars form part of the ring-shaped main line simultaneously. A complete ring distribution network is established by connecting the busbars of multiple outgoing cabinets.

1.Basic Definition of Solid-State Ring Main Unit

The solid insulated switchgear is fully named the solid insulated ring main unit. And our Derui  Electric Company is a manufacturer of solid insulated switchgear that adopts epoxy resin and other solid insulating materials.It fully encapsulates core electrical components such as vacuum interrupters, disconnectors, and busbars, replacing traditional SF₆ gas as the insulating and arc-extinguishing medium. It is an environmentally friendly smart grid power equipment Smart Rmu.