2.1.2绕组
•绕组由纸绝缘铜导体制成，这些铜导体以常规方式换位
整个绕组的间隔确保磁链和电流分布均匀
绞线。
•高压绕组采用交错或屏蔽结构，以确保均匀
冲击电压分布。绕组中的绝缘垫片的布置应确保油
直接穿过整个绕组，以确保适当的冷却。
2.1.3冷却
•对于ONAN/ONAF冷却，油流经连接到
热虹吸管效应储罐。
•对于AF/OD AF/WF冷却，油通过提供的油泵引导通过绕组
在外部冷却器装置中。
TBI AF/IMS001/R3变压器安装、调试、运行和维护
22 | P a g e
•外部冷却器装置由直接安装在水箱上的压制钢板散热器组成，或
风冷变压器的独立冷却器组和水冷式油-水热交换器
变压器。
2.1.4油箱和盖
•油箱和盖由钢板焊接而成，适合承受
根据CBIP手册进行真空和正压试验。对于大容量电力变压器，
储罐应为钟形结构。这是为了避免吊运重型铁芯和绕组
现场需要非常大容量的起重机。相比之下，上水箱的重量要轻得多
与铁芯和绕组相同，可使用小容量起重机起吊。
•水箱和盖子的构造应避免收集水的口袋。
•水箱和盖子的设计应确保可以按照以下要求通过铁路/公路/水路运输
客户规范。
注：变压器箱配有两个接地端子。电缆盒接地时，
母线槽等，应确保不因多重接地而形成闭合回路
连接。

2.1.2 WINDINGS • Windings are made from paper insulated copper conductors which are transposed at regular intervals throughout the winding for ensuring equal flux linkage and current distribution between strands. • Interleaved or shielded construction is adopted for the high voltage windings to ensure uniform distribution of impulse voltages. Insulation spacers in the winding are arranged such that oil is directed through the entire windings for ensuring proper cooling. 2.1.3 COOLING • For ONAN/ONAF cooling, oil flows through the winding and external cooler unit attached to the tank by thermosyphon effect. • For OF AF/OD AF/ OF WF cooling, the oil is directed through the winding by oil pumps provided in the external cooler unit. TBI AF/IMS001/R3 Installation, Commissioning, Operation & Maintenance of Transformer 22 | P a g e • External cooler unit/units consist of pressed steel sheet radiators mounted directly on the tank or separate cooler banks for air-cooled transformers and oil to water heat exchangers for water cooled transformers. 2.1.4 TANK & COVER • Tank and Cover are manufactured by welding steel plates and are suitable for withstanding full vacuum and positive pressure test as per CBIP Manual. For large capacity power transformers, the tank will be of bell type construction. This is to avoid lifting of heavy core and windings, which requires very large capacity crane at site. The weight of upper tank will be much less in comparison with that of core & windings and can be lifted by using a small capacity crane. • Construction of the tank and cover are such that pockets for water collection is avoided. • The tank and cover are designed such that these can be transported by railways/road/water as per customer specification. Note: Transformer tank is provided with two earthing terminals. While earthing the cable box, busduct etc., it should be ensured that no closed loop is formed because of multiple earthing connections.