5600双钳多功能接点地电阻测试仪.doc
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1、For ensure two learn a do learning education made effectiveness, promote all members consciously respected Constitution, and comply with party rules, with XI General Secretary series important speech spirit armed mind, and guide practice, and promoted work, do qualified Communist, according to Commu
2、nist 2016 city education information work special self-examination report XX City Bureau, and XX city government education steering mission: according to XX Province Government Education Steering Committee Office on carried out province education information work special Steering check of notificati
3、on ( Teach SC letter x 20164) documents, about quickly organized in our city Education Bureau Department in charge of the supervision standards for learning and study of informatization of education in charge of primary and middle schools in the city led by specialized training, issued a notice of m
4、eeting, special supervision and school self-assessment form. The school at the time of preparation, special organizational self-assessment. City Bureau organization about personnel in school since assessment of based Shang for has summary and self-examination, now will situation reported following:
5、a, and led attention according to Ministry of education on issued Liu Deputy Prime Minister in second times national education information work videophone Conference Shang speech of notification (taught technical 20156,) of file spirit, I City Government is in charge of led and education administrat
6、ive sector main head height attention, learning convey has central led in first international education information Assembly speech spirit, Learning to communicate the spirit of the second National Conference on videophone education information and instructed relevant departments according to the do
7、cument, has developed the education development plan of the city. Second, overall management, coordination, establish management systems and propulsion mechanisms XX education started in the proceedings of the XX Party 200311 working arrangements, XX municipal party Committee Municipal Government at
8、tach great importance to education information, education information development into the citys overall planning, education as a breakthrough in the construction of educational modernization in advance XX, city leaders often goes into the front line of education guide education work and financially
9、 guaranteed. Equipment improvement, application is the power education development. To tube easy good information technology equipment, XX City used layered is responsible for, and unison of strategy initiatives: that Bureau established information work led group, urged city education information ma
10、nagement and application work, education information and equipment Center is responsible for equipment maintenance, built information work platform, guarantee platform normal run; will electronic Chief, and personnel, and results, and student, and Senate, and assets, management field of information
11、application decomposition to Bureau Office, and personnel section, and manages, and education section, and meter fiscal section, functions Department, To drive forward e-Government as a breakthrough in the informatization of education, education administrators into full play in the education of info
12、rmation guidance and example, and take this opportunity to point to gradually expand the scope of education application of information technology. Formed Department personnel grasp business and educational information development and application; application and武汉市华天电力自动化有限责任公司目录一、引 言5二、概 述5三、主要特点5四
13、、主要技术指标6五、面板功能简介7六、测量原理及使用方法81、双钳法81)测量原理 82)多极并联接地电阻的测量 9 3)双钳法测独立接地体的方法 102、地 桩113、存 储124、查看/删除125、保 持12七、注意事项12八、装箱清单13一、引言欢迎使用HT5600双钳多功能接地电阻测试仪,该仪器用于接地电阻的测量,并在此基础上评价接地质量。该仪器是基于我们多年接地电阻和电气安装测试设备的生产和开发经验设计并制造。HT5600双钳多功能接地电阻测试仪是一种手持式的接地测量仪。仪器配备有测试所必需的附件。操作简单、直观,操作者只需要阅读说明书而不必参加专门的培训就能够操作。二、 概述优良的
14、接地系统是电力、电信、电气设备安全可靠运行的重要保证。接地电阻大小是接地系统品质优劣的评判依据。精确、快速、简捷、可靠的接地电阻测量方法,已成为防雷接地领域内技术进步的迫切需要。HT5600双钳多功能接地电阻测试仪适用于电信、电力、气象、机房、电力配电线路、铁塔输电线路、加油站、工厂接地网、避雷针等。该仪器除了具有传统打辅助地极测接地电阻的功能外,还具备了无辅助地极测量的独特功能,改变了测试接地电阻传统的测量原理和手段:采用双钳口非接触测量技术无需打辅助地极,也无需将接地体与负载隔离,实现了在线测量。在单点接地系统、干扰性强等条件下,可以采用打辅助地极的测量方式进行测量。三、主要特点1、双钳法
15、/地桩法双重测量方式: 适合任意接地场所,多点或单点接地,都可正常测试;2、抗干扰能力强: 自产生高频电流,从而过滤市电中50Hz、100Hz等谐波干扰电流,即使在500KV变电站环境下,也能精确测量;3、测量范围广、分辨率高: 量程从0.01200,分辨率0.01,对0.7以下接地电阻,也能准确测量;4、大钳口设计: 钳口直径50mm(标准配置),满足用扁铁/钢作接地引线的情况,特殊钳口尺寸可按客户要求定制;5、大容量数据存储: 可储存200组测量数据;6、操作简单,单人作业: 全中文操作界面、体积小、重量轻,防爆便携箱,野外测量携带方便。四、主要技术指标1、接地电阻测量范围:双钳法:0.0
16、1200地桩法:0.012002、准确度:双钳法:3%2个字地桩法:2%2个字3、最小分辨率:0.014、钳口尺寸:50mm5、存储容量:200组数据6、工作温度:0C + 50C7、供电方式:8节5号镍氢充电电池或普通AA电池8、重量:0.8kg(含电池)9、尺寸:26513065 mm3五、面板功能简介1、按键功能本机共设七个按键,具体功能如下:“电源”:电源开关键;在开机后,5分钟不做任何操作会自动关机。 “双钳法”:在多点接地的接地网中,用这种方式进行测试;另外,在其它功能时,此键为向上光标或增加键。“地桩法”:按此键采用打辅助地桩的方式测量接地电阻,另外,在其它功能时,此键为向下光标
17、或减小键。“”:光标左移键。“”:光标右移键。“测试”:在双钳法或地桩法测量时,按此键开始测量。“确认”:按此键进入选定的功能。2、测试端口(见图1所示)图1 面板接线柱该仪表与外界连接的接口有两组:双钳法使用上部的“接收”和“发射”两个航插;地桩法使用下部的“C2”、“P2”、“P1”和“C1”四个插孔。充电插孔位于仪器的左下方,当仪表显示屏左上角的电量指示变低时,请用本公司配套的地阻仪专用充电器进行充电。该充电器为智能充电器,当电池充满时,即充电器指示灯熄灭时,自动停止对电池进行充电,有效防止电池过充。注意:仪表长期不用时,应定期对电池进行充电(如两个月),避免电池过度放电而损坏。用普通电
18、池时切勿充电。六、 测量原理及使用方法1、双钳法1)测量原理此方法的优点在于:一是操作简单。可以在不断开待测设备电源,在其正常工作时进行测试,不必插入测量探头,也不必将被测电极分开,只需要双钳夹着接地导体就可以测出其接地电阻。二是精度高。其精度可以达到0.01。三是抗干扰能力强。可以滤出各种工频谐波。四是可以作为打地桩方式的补充。在很多条件下(如房屋密集或铺满水泥的地区),很难甚至不可能采用打桩的方式对接地电阻的测量,使用双钳口测试原理,可以不用打接地桩进行测量。该测量原理的唯一的不足是:不能够直接对单点接地系统的测量。在单点接地系统中应慎用钳形地阻表。其测量原理简述如下:本仪表配有两个钳口:
19、电压钳和电流钳。如图2所示,电压钳在被测回路中激励出一个感应电势E,并在被测回路产生电流I,仪表通过电流钳可以测得I值。通过对E、I的测量,由欧姆定律:R=E/I,即可求得R的值。图2 测量原理2)多极并联接地电阻的测量对多点接地系统(例如输电系统杆塔接地、通信电缆接地系统、某些建筑物等),它们通过架空地线(通信电缆的屏蔽层)连接,组成了接地系统。如图3所示:图3 多点接地系统地阻的测量当用钳表将两个钳口钳入被测接地线上,两个钳口的间距为30cm左右,发射钳夹插入“发射”航插孔,接收钳夹插入“接收”航插孔,两航插孔不可互换,(如上图测量时), 其等效电路见下图。图4 等效电路则RT =Rx+
20、R0其中:RT:仪表测量出的值Rx:待测接地电阻R0:所有其它杆塔的接地电阻并联后的等效电阻。虽然,从严格的接地理论来说,由于有所谓的“互电阻”的存在,R0并不是通常的电工学意义上的并联值(它会比电工学意义上的并联值稍大),但是,由于每一个杆塔的接地半球比起杆塔之间的距离要小得多,而且毕竟接地点数量很大,R0要比R1小得多。因此,可以从工程角度有理由地假设R0=0。这样,我们所测的电阻就应该是RX了,即RTRx。多次不同环境、不同场合下与传统方法进行对比试验,证明上述假设是完全合理的。非接触测量法(即双钳法)是一种先进的测量技术,具有诸多优点。不过,测试仪测得的电阻是包括被测接地电阻在内的整个
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