TSXSDCPAY
•恢复油位，并以相同方式组装下一个散热器。
3.4.7编组箱
•编组箱应安装到位。O.T.I.和W.T.I.袋中应装满变压器油。
O.T.I.和W.T.I.灯泡应安装在各自的口袋中。
•将O.T.I.和W.T.I.的“报警”和“提示”触点设置为所需值。O、 T.I，设置A=85°C&T=95°C
W、 T.I.，A=95°C和T=105°C的设置被视为良好。可以根据当地情况制定
条件
3.4.8电缆箱
•当提供电缆盒时，应安装电缆盒并进行电缆端接。充油电缆盒应适当充油。在“母线槽”连接的情况下，变压器配有法兰
接收母线槽。由于连接和安装应通过端子连接至架空线路
连接器。
3.5空气释放
•通过缓慢拧下衬套、衬套袋、瓦斯炉处的放气塞来释放空气
继电器、主油箱盖、油电涌继电器等，来自11、22 8t 33 KV的纯瓷套管，空气可
松开螺母，压下橡胶垫片，然后向下压下金属零件，即可释放。
3.6油取样和过滤
•不得直接从油桶或运输容器向变压器中注油，因为有可能
沉淀水或沉淀物也可能与油一起泵入变压器。
•桶或运输容器中的油应填充到储油罐中，油参数应
在注入变压器之前进行测试。
•如果油桶中收到油，应从尽可能多的油桶中取样进行测试。
表-1
从桶中选择样品
批次中的桶数从中取样的桶数
2至5 2
6至20 3
21至50 4
61至100 7
101至200 10
201至400 15
401及以上20
TBI AF/IMS001/R3变压器安装、调试、运行和维护
44 | P a g e
•应从滚筒底部采集样本进行测试。
•如果容器中收到油，应通过油箱出口的取样阀收集油样，或
根据建议，使用盗斗从桶中取样。应允许容器
在抽取样品之前，至少静置一小时。
•进行以下测试，以确定油的质量。
 击穿电压试验
 含水量试验
 棕褐色三角洲
 电阻率
•如果油不符合规定的标准，则应在加油前过滤油并储存在储油罐中
进入变压器。从桶中泵油时，桶可能会适当倾斜，以确保
从每个桶中取出完整的油。
3.7保持质量的预防措施
•作为限制水分吸收的预防措施，变压器不应
在大气中连续暴露8小时以上，应安排安装工作
照着
•对于400 kV及以上的高压作业，应净化露点低于-400℃的干燥空气
内部装配工作期间，在油箱内部。

• Restore the oil level and assemble the next radiator in the same manner. 3.4.7 MARSHALLING BOX • Marshalling box should be fitted in Position. Pockets of O.T.I. & W.T.I., should be filled with transformer oil. Bulbs of O.T.I. & W.T.I. should be fitted in position in their respective pockets. • Set the 'Alarm' & Tip' contacts of O.T.I. & W.T.I., at required values. O.T.I, setting of A=85°C & T=95°C W.T.I., setting of A=95°C & T=105°C are considered good. They can be worked out to suit local conditions. 3.4.8 CABLE BOX • When Cable Boxes are provided they should be mounted and cable terminations done. Oil filled cableboxes should be duly filled with oil. In case of "Bus-Duct" connections, transformer is provided with a flange to receive the bus-duct. Due to connection and fitting should be done to over-head line by a terminal connector. 3.5 AIR RELEASE • Release air by slowly unscrewing Air Release Plugs provided at Bushings, Bushing Pockets, Buchholz Relay, Main Tank Cover, Oil Surge Relay etc. From plain porcelain bushing of 11, 22 8t 33 KV, air can be released by loosening the nut pressing the rubber gasket and pressing the metal part down. 3.6 OIL SAMPLING AND FILTERING • Oil should not be filled in the transformer directly from the drums or transport container as there is a chance of precipitated water or sediments may also be pumped into the transformer along with the oil. • Oil from the drums or transport container should be filled into the oil storage tank and oil parameters should be tested before it is filled into the transformer. • If oil is received in drums, samples should be taken for testing from as many drums. Table -1 Selection of Samples from drums No. of Drums in a Batch No. of Drums from which Samples to be taken 2 to 5 2 6 to 20 3 21 to 50 4 61 to 100 7 101 to 200 10 201 to 400 15 401 and more 20 TBI AF/IMS001/R3 Installation, Commissioning, Operation & Maintenance of Transformer 44 | P a g e • Samples should be collected from the bottom of the drums for testing. • If oil is received in containers, oil sample shall be collected through the sampling valve at the tank outlet or by means of thief dipper as suggested for sampling of oil from drums. The container should be allowed to stand for at least one hour before drawing the sample. • Conduct the following tests for ascertaining the quality of oil.  Breakdown Voltage test  Moisture content test  Tan delta  Resistivity • If oil does not meet the specified criteria, oil should be filtered and stored in the oil storage tank before filling in to the transformer. While pumping oil from the barrels, the barrels may be tilted suitably to ensure that complete oil is taken out from each barrel. 3.7 PRECAUTION TO MAINTAIN QUALITY • As a precautionary measure to restrict absorption of moisture, the transformer should not be exposed to atmosphere for more than 8 hours continuously and erection work should be scheduled accordingly. • For high voltage jobs of 400 kV and above, dry air having dew point below -400C should be purged inside the tank during internal assembling work.