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2024年4月28日发(作者：c语言闰年代码)
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1. Application 应用
The URF 25/10 monitoring relay is an alarm device for oil-insulated high-duty tapping switches
of transformer from damage as might be caused by failure of the tapping switch system or the
application of excessive currents (strong arc) due to a transformer defect.
URF25/10油流继电器是有载调压分接开关的一个报警装置。当分接开关内部出现故障或由于变
压器本体故障引发短路电流（大电弧）时，可起到保护分接开关的作用。
On response the monitoring relay will generate a continuous pulse operating the circuit breaker
of the transformer to be protected and disconnecting the latter from the source of supply.
Observing the instructions of the plant operator, the transformer can be restarted only after
operation of the test and reset button.
当故障时，油流继电器持续发出信号以断开变压器的主断路器，这样可以保护后级电气装置不受
损坏。按照生产商操作手册的说明，仅当操作油流继电器上的试验和复位按钮后，变压器才能合
闸继续运行。
The monitoring relay is available with single and double-contact circuit system. On response of
the baffle plate due to an increased oil flow, the double-contact circuit provides two signals,
hence improving operational safety of the equipment.
油流继电器可以提供单触点和双触点两种形式。当油流继电器内动作挡板由于油流作用动作时，
双触点电路可提供两组独立的信号，这样可以进一步提高设备的安全性。
2. Construction 结构
The monitoring relay consists of the following sub-assemblies:
油流继电器由以下部件组成：
1) Casing assembly
2) Cover assembly
机壳
机盖
3) Switch mechanism 信号机构
2.1 Casing assembly 机壳
The casing consists of weatherproof light metal casting. To check the switch system for proper
function, the casing is provided with inspection glasses arranged opposite each other. On
request, the inspection glasses can be provided with hinged lids.
机壳由防风雨的轻金属材料制成。机壳前后各自安装了一个观察窗，以便于检查内部信号机构的
工作情况。如需要的话，观察窗处可另加可旋转的保护盖。
2.2 Cover assembly 机盖
The cover consists of a weatherproof light metal casting. The connection box, the test and reset
button and a technological bleeder screw are arranged above the cover.
机盖由防风雨的轻金属材料制成。上面安装有接线盒，试验和复位按钮和放油用的螺栓。
In addition to the earth connection, the connection box accommodates the electric bushings in
the floor. The connection box is closed by a hinged cap so that it is accidental-shock safe and
no dirt get inside the box.
除有接地点外，接线盒内还提供了信号引出的接线柱。接线盒上有一个盖子可以防止意外撞击和
灰尘进入内部。
The connecting cable can be inserted optionally through either PG 16 screwed conduit. The
test and reset button is covered by a cap nut.
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