TSXETY210
•对于小容量变压器，防爆通风口配有隔膜，隔膜会破裂
如果内部压力异常升高。有时提供防爆通风口
带有双隔膜，即使内部隔膜破裂，外部隔膜仍保持完整。
可以通过中提供的油位计查看内部隔膜的破裂情况
隔膜之间。
2.1.7油气驱动（瓦斯）继电器
•气体和油驱动继电器安装在从变压器油箱到膨胀箱的供给管中
收集油中产生的气体的容器。继电器的工作原理是：
油浸式变压器中的故障类型会产生气体。该气体收集在
继电器主体，用于关闭报警开关。
•如果发生任何严重故障，机油压力突然升高会导致机油涌向
膨胀容器，用于闭合跳闸触点。油涌将冲击
活门安装在跳闸元件上，使其绕其轴旋转，从而使水银开关
至闭路位置，反过来操作跳闸装置。
•在变压器严重漏油的情况下，报警和跳闸元件轮流运行
按照前面描述的气体收集方式。
•两个黄铜小旋塞安装在继电器体顶部，其出口通过螺纹连接
如果需要收集气体样本，应配备排气管。
•在有载分接开关及其油膨胀容器之间的管道连接中，一个浮子
安装了机油浪涌继电器。该继电器的工作原理是油冲击活门，导致
连接至跳闸电路的水银开关的操作。
•由于正常分接头切换过程中产生的气体，因此消除了气体驱动报警开关
操作将发出不必要的警报。

• For Small Capacity transformers, an explosion vent is provided with a diaphragm, which will break in the event of abnormal increase in internal pressure. Sometimes the explosion vent is provided with double diaphragm such that the outer one remains intact even after the inner one is ruptured. Rupturing of inside diaphragm can be checked by viewing through the oil level gauge provided in between the diaphragms. 2.1.7 GAS & OIL ACTUATED (BUCHHOLZ) RELAY • Gas and oil actuated relay is fitted in the feed pipe from the transformer tank to the expansion vessel for collection of gas, if generated in the oil. The relay operates on the fact that almost every type of fault in an oil immersed transformer gives rise to generation of gas. This gas is collected in the body of the relay, and is used to close the alarm switch. • In the event of any severe fault, the sudden increase in oil pressure causes an oil surge towards the expansion vessel and this is used to close the trip contacts. This oil surge will impinge on the flap fitted to the trip element causing it to rotate about its axis and thus bringing the mercury switch to the closed-circuit position, which in turn operates the tripping device. • In the event of serious oil loss from the transformer, both alarm and trip elements operate in turn in the manner previously described for gas collection. • Two brass petcocks are fitted at the top of the relay body, the outlets of which are threaded to take a bleed pipe if required for collection of gas samples. • In the pipe connection between On Load Tap Changer and its oil expansion vessel a single float Oil Surge Relay is fitted. This relay operates on the principle of oil surge impinging on a flap causing operation of the mercury switch connected to the trip circuit. • Gas actuated alarm switch is eliminated because the gas generated during normal tap changing operation will give unnecessary alarm.