Combined voltage transformer for ring main unit

• Main Authors: ZHANG BI, SUN GUANYUAN, HU XUCHAO, HUI ZHAOPENG, WANG YIZHI
• Format: Patent
• Language: English
• Published: 13.05.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; INDUCTANCES; MAGNETS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; TRANSFORMERS

The utility model relates to a combined voltage transformer for a ring main unit. The combined voltage transformer for the ring main unit comprises voltage transformer coils and a casting body. The combined voltage transformer for the ring main unit is characterized in that the two voltage transformer coils are arranged in the casting body, the two coils are connected in a V-V mode, the three-phase combined voltage transformer is formed, three high voltage connection terminals of the combined voltage transformer are plug-in type taper joints which are in close fit with ring main unit cable joints with taper holes, and fuses electrically connected with the transformer coils and the cable joints are arranged in taper bodies. The combined voltage transformer for the ring main unit has the advantages that the product is small in size and light in weight; the primary high voltage terminals are located in elbow-type cable heads with the surfaces at zero potential, so that mounting space of the voltage transformer is reduced; the mounting and dismounting are convenient due to the plug-in type connection, and the operation is safe and reliable.