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  • 商品名称： BC系列气体继电器

     

     

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BC型气体继电器

油浸式变压器大多数故障总是伴随着气体的产生。 使用合适的气体继电器（BC气体继电器）可作为监控故障的报警装置。
通过分析继电器内积聚的气体可以较好的了解故障的类型，但当变压器处于运行状态时，直接从气体继电器中采集气体的危险性较大。
集气盒（气体采样装置）可以有效规避这种风险性，通过安装在变压器上便于接近的位置，同时远离并连接上气体继电器从而实现气体采集的功能。
技术特征

BC型气体继电器由经机械加工处理的两铝合金铸件装配而成且可实现良好的油密封效果。
1）气体继电器本体装配有带钢化玻璃示窗，其上标注有单位为立方厘米的刻度标线，用于指示内部气体累积容量。排油塞安装在本体底部。
2）顶盖与继电器内芯结构本体装配在一起，动作机件的内芯结构包含两个浮球及相应包裹在玻璃管中的联动开关、一个经校准的流速挡板及两套永久磁铁组成。
顶盖结构还包含如下附件：
• 带G1/8”外螺纹和配套保护罩的放气阀(4)。
• 带保护外罩的气压试验阀（5），用于检测报警接点及配套电路。
• 带保护外罩的试验顶杆（探针）(2)，用于机械触发及检测报警及跳闸接点。
标准配置的接线盒由4个M6接线柱和一个接地端子构成。
铝合金外表面在喷涂颜色为73B03 (GSB浅灰色)漆层前须经过表面磷化处理。这种处理工艺被验证在包含沙漠及热带地域的大部分使用场合下高可靠性。然而，特别在一些恶劣的环境区域（>500h盐雾），诸如高腐蚀性大气（酸性）环境下，推荐使用合适的环氧底漆进行处理（如需要需在订货时阐明）。 所有外露的黄铜配件都进行了电镀处理，且所有螺帽皆为不锈钢材质。

VMOA

BUCHHOLZ RELAY “BC” TYPE

Most faults in oil filled transformer are accompanied by the generation of gas. By using a suitable relay (BC Relay) the formation of this gas can be used as a warning of a developing fault.
The analysis of the evolved gas can often give good indication of the type of malfunction but accessing the Buchholz Relay during live operation could be hazardous.
The Gas Sampling Device has been designed to overcome this problem by sitting the unit remote from the Buchholz Relay and in a readily accessible position typically on the side of the transformer.

Technical features
The Buchholz relay BR type is an assembly of two machined aluminium alloy castings that effect a perfect oil seal.
1）The main body of the relay is fitted with tempered glass inspection windows with graduated scale markings in cubic centimeters to indicate the internal volume. The oil drain plug is located at the bottom of the main body;
2） The top cover carries the frame which contains the moving parts of the relay. These comprise the two floats and their associated switches encapsulated in glass bulbs, one calibrated flow valve and two permanent magnets.
The cover also carries :
•  a gas discharge valve(4) with G1/8" in male thread with protective cap.
•  A valve(5) for pneumatically testing the alarm and insulation circuits, with protective cap.
• A push rod(2) for mechanically tripping the alarm and the insulation circuits, with protective cap.
A terminal box which as standard contains 4 numbered M6 terminals and one earth terminal.
To the external aluminium alloy parts is given a phosphate treatment prior to applying one coat of vinyl enamel, colour 73B03 (light grey GSB).
This treatment has proved more than satisfactory over the years for the majority of applications including desert and tropical situations. However, in particularly severe applications (>500h salt fog) such as applications in corrosive atmospheres (acids) a suitable epoxy primer is recommended. (This should be discussed at the time of selection).
All external brass fittings are plated and all nuts are made in stainless steel.