SCR9型干式变压器结构特点

SCR9型干式变压器结构特点

SCR9型属绕包绝缘干式变压器，也是继SC型SC8型以后出现的第三代干式压器，江西变电设备厂、上海ABB公司、云南变压器厂等生产这特种变压器。它有下列几个重要特点。

(1)绕制工艺，采用德国百事达公司全自动数控绕包机设备，利用徽机编程控制来绕制绕组。高压绕组和0.1kV以上的低压绕组采用漆包圆铜线或扁铜线绕制成多层层式，0. 1kV 以下的低压绕组采用箔式结构。树脂绕包绕制工艺流程如下：

绕线模组装、调试数控程序→绕制绕组内径侧主绝缘层→

绕线→绕制段间、层间、端部绝缘→绕线→加气道板→绕线→

绕丝→绕制绕组外径绝缘→移至烘箱旋转固化→拆除绕线模→整形

为了保证绕组质量和可操作性，需要采取以下措施：

1)在组装绕线模时，放置一层聚酯薄膜，以利于脱模。

2)在绕线时，由于带树脂的玻璃丝浸润到匝间.因此，绕制裕度放宽至5%—7%.以便排满预定线匝。

3)绕线分接头尽量从最外层线匝中引出，易于焊接操作。

4)旋转固化时，选择合适的旋转速度，保证绕组树脂不被离心外滋和冻结成块。

(2)变压器的特点，各种类型干式变压器都其有阻燃自熄的功能，但相对来说，绕包干式变压器明显好一些。

SCR9 type is wrapped insulation dry-type transformers, but also following the SC-type SC8 model that emerged after the third-generation dry-pressing devices, substation equipment factory in Jiangxi, Shanghai ABB, Y unnan Transformer Factory production this special transformer. It has several important features.

(1) The winding process, using the German Blockbuster charter companies around the fully automatic CNC equipment, use of logo-programming control to wound windings. 0.1kV high voltage winding and low pressure over the use of enamelled round copper wire windings or more layers made of flat copper wire type, 0. 1kV following the use of low-voltage foil winding structure. Resin around the surrounding system process is as follows:

Winding mold assembly, commissioning →NC program wound winding diameter side of the main insulation layer →

→winding winding section, the layer, the end of the winding insulation →→→Winding increase airway board →

Winding wire wound around the outer diameter of the insulation →→→Move remove curing oven rotating winding plastic mold →

In order to ensure the quality and operability winding, need to take the following measures:

1) in the assembly when winding mode, place a layer of polyester film, in order to facilitate stripping.

2) In the winding, due to the glass with resin infiltration into the inter-turn, therefore, wound margin relaxed to 5% -7% for pre-booked turns.

3) The winding tap as much as possible from the outermost line in turn leads to easy welding.

4) Rotate the curing time, select the appropriate speed of rotation, to ensure that the resin is not winding and centrifugal freeze into a block outside of AIDS.

(2) the characteristics of the transformer, dry type transformers are the various types of flame-retardant self-extinguishing feature, but relatively speaking, around the lump sum type transformers was better.

变压器：