充油电力设备中如果发现游标中指示与变压器油的油位不一致，即出现假油位问题。
In oil filled power equipment, if the indication in vernier is inconsistent with the oil level of transformer oil, the problem of false oil level will appear.
这是由于小隔膜外部存在气体，并缺少放气阀，可通过松开法兰螺丝将气放掉，使油位处于正常位置。
This is due to the existence of gas outside the small diaphragm and the lack of vent valve. The gas can be released by loosening the flange screw, so that the oil level is in the normal position.
变压器的隔膜保护因维修工作任务较少、保护效果较好而被广泛使用。
The diaphragm protection of transformer is widely used because of less maintenance tasks and better protection effect.
但在隔膜保护变压器的实际运行中，常出现这类问题：油位原本指在特定油温线上，但是当温度变化显著时，油位会快速上升到游标的顶端，甚至出现溢油现象；如果温度下降幅度大，游标就会下降到底端看不到的位置，甚至会使瓦斯继电器发出轻瓦斯信号。
But in the actual operation of the diaphragm protection transformer, this kind of problem often occurs: the oil level originally refers to the specific oil temperature line, but when the temperature changes significantly, the oil level will quickly rise to the top of the vernier, and even oil spill phenomenon; if the temperature drops greatly, the vernier will drop to the invisible position at the bottom, and even make the gas relay send out light gas signal.
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