170INT11000
•对于66kV以上的变压器，应在全真空（1.0托或更高）下注油。380
66kV及以下额定值的变压器需要毫米汞柱或更高的真空度。真空度应
好使用McLeod真空计测量。
•将变压器中的油完全排空后，应从注油口抽真空
主油枕上的孔。如果储油柜配备有空气室，则应使用均压连接
避免损坏空气电池。
•开始真空前，应检查所有螺栓连接。散热器阀门应保持打开状态。
•应将透明乙烯软管连接至底部取样阀，以指示油位。
•如果提供了防爆通风口，则隔膜两侧的压力应均衡到
避免损坏隔膜。
•真空应保持6小时。
•可通过底部过滤阀注入机油，直到油位达到
油枕磁性油位计。
•不得使用天然橡胶软管，因为橡胶中的硫可能与油发生反应。
•应关闭进油阀，一小时后应打破真空。机油油位指示
可通过关闭底部取样阀来拆除乙烯软管。
•可将真空计分离，并将呼吸器组装到位。
TBI AF/IMS001/R3变压器安装、调试、运行和维护
55 | P a g e
•为防爆通风隔膜和OLTC分流器室提供均压连接
应移除。

• Oil injection shall be made under full vacuum (1.0 torr or better) for transformers above 66kV. 380 mm Hg or better vacuum is required for transformers rated for 66kV and below. The vacuum shall preferably be measured by using McLeod Vacuum Gauge. • After draining the oil completely from the transformer, vacuum should be pulled from the oil filling hole on main conservator. If the conservator is fitted with air cell, pressure equalising connection is required to avoid damage to the air cell. • Before starting vacuum, all bolted connections shall be checked. Radiator valves shall be kept open. • A transparent vinyl hose shall be connected to the bottom sampling valve for indicating the oil level. • If explosion vent is provided, the pressure shall be equalised on either side of the diaphragm to avoid damage to the diaphragm. • Vacuum shall be maintained for 6 hours. • Oil may be injected through the bottom filter valve until the level reaches 35OC marking on the Magnetic Oil Level Gauge of the conservator. • Natural rubber hose shall not be used as sulphur in the rubber may react with oil. • Oil inlet valve shall be closed and after one hour the vacuum shall be broken. Oil level indicating vinyl hose can be removed by closing the bottom sampling valve. • Vacuum gauges may be detached and breathers assembled in its position. TBI AF/IMS001/R3 Installation, Commissioning, Operation & Maintenance of Transformer 55 | P a g e • Pressure equalising connection provided for explosion vent diaphragm and OLTC diverter chamber shall be removed.