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矿用隔爆兼本质安全型漏电试验装置

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产品描述

一、行业要求及现状分析

按照《井下检漏保护装置安装、维护与检修细则 2022版》中第十八条规定：“每月至少对馈电开关进行一次远方漏电试验”，试验所需人数为3-5人。试验时需要先将真空磁力启动器停电闭锁，而后打开磁力启动器外壳，将试验电阻（660V用11K10W电阻，1140V用20K10W电阻）一端接到电磁启动器中接触器下方的某一相螺栓上，另一端接到磁力启动器本体接地螺栓上，而后装好启动器外壳，在与馈电开关近端人员确认后进行送电。在启动电磁启动器后，观察馈电开关是否及时断电。进而判断馈电开关动作是否牢靠。试验完毕后要拆去试验电阻恢复原状。

根据《煤矿井下供电的三大保护细则》相关规定，煤矿井下运行中的检漏保护装置，每月至少做一次远方人工漏电跳闸试验。

试验时需要人工接入试验电阻，操作步骤繁琐，停电影响时间较长，作业人员触电风险较高，存在安全隐患，本装置设备的安装使用，从根本上解决了这一问题。

按上述试验细则进行试验时，需要工人3-5人下井操作。需要拆装电磁启动器外壳两次，并需要对试验电阻进行拆装，操作复杂且有触电风险。

进行此试验时因无法测定馈电开关动作时间，无法测定漏电电流，因此无法真正准确的判定馈电开关的可靠性。

矿下现状：一般情况下漏电试验因过于繁琐且需要多班组合作以至于该试验少做甚至不做，更不会有完备的试验记录。

结论：井下远方漏电试验非常重要，且现有试验情况并不乐观。需要一款安全、便捷、省人工、免下井、能记录的远方漏电试验装置。

二、产品概述

矿用隔爆兼本质安全型漏电试验装置是针对井下低压电网中对馈电开关远方漏电进行试验设计的智能自动化装置。

该设备采用载波通信方式，利用电源电缆取代通信线，安装简洁方便，不需要再额外敷设通信线缆，即可实现远程通信与控制。作业人员不仅可以使用遥控器对电阻箱遥控操作，还可以利用后台软件实现远程远方漏电试验。“原来做远方漏电试验是每个月的一项重要且繁琐的工作，需要多人配合完成。现在做远方漏电试验，只需要拿遥控器轻轻一按就可以，安全、便捷，一台设备都解决了。”

该试验方法安全快捷，试验人员全过程不需要接触开关任何部位，从根本上消除了人员触电的风险，为试验人员的安全作业提供了强有力的安全技术基础保障。

矿用隔爆兼本质安全型漏电试验装置适用于煤矿井下和其他周围介质中含有甲烷、煤尘爆炸性气体环境中，在交流50Hz、额定电压1140（660V、127V）中性点不接地的三相电网中，作为对真空馈电开关的远方漏电试验使用，并具有远方合闸功能，同时存储历史试验数据，方便查阅与记录，也可通过工业网络（MODBUS-TCP）实现地面操作功能，无需下井即可完成试验。本产品还做到体积较小，质量较轻，安装方便。

三、技术参数

额定电压：1140V（660V/127V）

整机功耗：＜5W

试验箱内部工作电压：5V

载波模块动态功耗：1.5W

载波模块传输距离：2km

1140V试验电阻/功率： 20k/10W

660V试验电阻/功率：11k/10W

127V试验电阻/功率: 2k/10W

四、产品特点

本装置是针对井下远方漏电试验现状，设计的一款自动化试验装置，装置具备以下特点：

安全保险：本装置一次安装长久使用，试验时无需打开任何外壳，无需进行接线操作，无需触碰任何井下装置即可完成试验。亦可在连接通讯电缆的情况下地面完成试验，无需下井。

方便快捷：本装置安装简单，接线少。试验过程简单明了，仅需少量操作即可完成试验。

准确可靠：本装置具有漏电时间检测和漏电流检测功能，并具备记录能力，可随时查阅。

灵活兼容：本装置适用于1140V、660V、127V等井下多种电压环境。并适用于一台馈电开关多台远方电磁启动器场景。每台主机可托配最多8台远端试验箱。

减人增效：本装置试验全程仅需一人在馈电开关处即可完成，试验时长约为5分钟。连接通讯电缆时，在地面即可完成试验（需要地面计算机配合）。

网络信息：本装置有配套的地面后台监控系统，通过工业网络（MODBUS-TCP），将所有安装在井下的试验装置与地面网络后台连接通讯，即可实现在地面操作试验工作，无需下井即可完成试验。同时，可将井下各试验装置数据采集上传到地面网络平台，并可存储查询。

五、使用条件

1、海拔高度不超过2000m；

2、环境温度为-5°C~ +40°C；

3、空气湿度不大于95%（+25°C ）；

4、无足以腐蚀金属和破坏绝缘的气体或蒸汽的环境中；

5、在有瓦斯、煤尘爆炸性气体混合物的环境中；

6、在无雨雪与滴水的地方；

7、与水平面的安装倾斜度不超过15°；

8、污染等级：3级。

六、工作原理

漏电试验主要在远方漏电试验箱内完成，远方漏电试验箱内部装有与系统电网匹配的漏电电阻，当馈电开关合闸后，操作人员做出漏电试验指令，内部控制系统控制远端试验箱内高压继电器吸合，这时电网电压通过漏电电阻与地接通，产生漏电电流，当馈电开关检测到漏电电流后，就会漏电保护动作，线路断电，远方漏电成功。而后操作人员做出复位或合闸指令恢复电网状态。

七、执行标准

GB/T 3836.1-2021 《爆炸性环境第1部分：设备通用要求》

GB/T 3836.2-2021 《爆炸性环境第2部分：由隔爆外壳“d”保护的设备》

GB/T 3836.4-2021 《爆炸性环境第4部分：由本质安全型“i”保护的设备》

Q/DT 01-2022 《矿用隔爆兼本质安全型漏电试验电阻箱》

八、外形尺寸及重量

长×宽×高mm：507mm×192mm×413mm

重量 Kg：＜50kg

九、设备安装示意图

无

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