- 商品详细介绍
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NW系列气体继电器(带远程信号输出） |
| 产品描述 |
| EMB公司规格化了的瓦斯继电器以已知的方式聚集绝缘液中未溶解气体，当气体体积超出事先给出的阈限值时将会发出报警。也就是说，在气体体积未达到规定的数值之前，设备不会产生报警信号。而且它无法给出伴随时间的流逝，瓦斯气逐渐聚积增长量的过程。 而与时间相关绝缘液中未溶解气体的聚集过程，恰恰是故障判断的一个十分明显的参数标准。因为故障瓦斯气的数量和成分与故障原因的形式和能量大小有关。突然间高能量的故障引发在很短的时间内产生大量的瓦斯气，而潜滋暗长的故障则产生小数量的瓦斯气。 NM 结构系列瓦斯继电器将通过持续不断和模拟式瓦斯气体积测量，及时发现在继电器内聚积的瓦斯气，获得关于这一气体发展过程的信息，它是及早判断故障的基础。 NM结构系列的瓦斯继电器又附加安装了一个电容测量探头。此探头安装在瓦斯继电器顶盖上。测量设备的电子放大器与接线盒盖板组为一体。探头和放大器采用一根15米长屏蔽式三线技术并且使用插座方式连接在一起的。借助这一缆线将提供电源电压和获取输出信号。 管道公称内径: 25 毫米 (1"), 50 毫米 (2"), 80 毫米 (3") 连接方式: 螺纹式或法兰盘式 |
| 选定的技术参数： |
电压: 交流/直流12 伏至最大250 伏电流: 交流/直流0.01 安至最大2安 在如下情况下开关系统启动： 磁性控制挡板 NM结构系列瓦斯继电器配置可达三个磁触点式干簧管（选项详见使用说明书） |
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NW Series Buchholz relay(With remote signal output ) |
| PRODUCT DESCRIPTION |
| The standard Buchholz relay detects undissolved gases in the insulating liquid and indicates their presence when a specified threshold is exceeded, meaning that up to a certain gas volume, no signal is generated. Neither is it possible to gather information about the length of time it takes for gas to accumulate. The length of time taken to generate undissolved gases in the insulating liquid is a very important criterion when it comes to evaluating the occurrence of damage, as the quantity and composition of the fault gases depend on the nature and level of the energy involved in the underlying fault. Spontaneous and energy-rich faults generate large quantities of gas within a short period of time, whilst small volumes of gas are generated in the case of minor and slow-developing faults. Buchholz relays of the NM series allow continuous and analogue gas volume measurement so that gases which have accumulated in the relay are detected early on, information can be gathered about the generation of the gases, and it is easier to analyze the fault at an early stage. Buchholz relays of the NM series are also equipped with a capacitive sensor. The sensor is installed in the cover of the Buchholz relay. The cap of the terminal box accommodates the electronic amplifier of the measuring unit. Sensor and amplifier are connected by a 15 m shielded cable in three-wire technology with a cable connector. This cable is used for the supply voltage and the output signal. Pipe diameter DN: 25 mm (1"), 50 mm (2"), 80 mm (3") Type of connection: threaded or flanged |
| Selected technical data: |
Voltage: AC/DC 12 V to max. 250 V Response of the switching system in the case of: Switching element: magnet contact tube Contact setting of the switching system: normally-open contact, normally-closed contact, change-over contact Buchholz relay of the NM series equipped with up to three magnet contact tubes (see operating instructions for switching design options) |
