继电器SR469-CASE 469-P5-HI-A20-E议价

继电器SR469-CASE 469-P5-HI-A20-E议价

继电器SR469-CASE 469-P5-HI-A20-E议价

继电器SR469-CASE 469-P5-HI-A20-E议价

继电器SR469-CASE 469-P5-HI-A20-E引脚图

继电器SR469-CASE 469-P5-HI-A20-E说明书

SR469-CASE 469-P5-HI-A20-E国家电网逐步规范了电表技术要求，制定相关行业标准以及技术规范，这为继电器参数检测提出了一些技术难题，如继电器的负载通断能力、开关特性测试等。因此，迫切需要研究一种设备，实现继电器性能参数的综合检测。

SR469-CASE 469-P5-HI-A20-E根据继电器性能参数测试要求，测试项目可以分为两大类，一是不带负载电流的测试项目，如动作值、触点接触电阻、机械寿命；二是带负载电流的测试项目，如触点接触电压、电寿命、过负荷能力。

SR469-CASE 469-P5-HI-A20-E主要测试项目简单介绍如下：（1）动作值。继电器动作时所需电压值。（2）触点接触电阻。触电闭合时，两触头之间的电阻值。（3）机械寿命。机械部分在不损坏的情况下，继电器反复开关动作次数。（4）触点接触电压。触电闭合时，触电回路中施加·定负载电流，触点间电压值。（5）电寿命。继电器驱动线圈两端施加额定电压，触点回路中施加额定阻性负载时，每小时循环小于300次、占空比1∶4条件下，继电器的可靠动作次数。（6）过负荷能力。继电器驱动线圈两端施加额定电压，触点回路中施加1．5倍额定负载时，动作频率（10±1）次/分条件下，继电器可靠动作次数 。

SR469-CASE 469-P5-HI-A20-E测触点电阻：用万用表的电阻挡，测量常闭触点与动点电阻，其阻值应为0；而常开触点与动点的阻值就为无穷大。由此可以区别出那个是常闭触点，那个是常开触点。 

SR469-CASE 469-P5-HI-A20-E测线圈电阻：可用万用表R×10挡测量继电器线圈的阻值，从而判断该线圈是否存在着开路现象。

SR469-CASE 469-P5-HI-A20-E测量吸合电压和吸合电流：用可调稳压电源和电流表，给继电器输入一组电压，且在供电回路中串入电流表进行监测。慢慢调高电源电压，听到继电器吸合的声音时，记录吸合电压和吸合电流。为求准确，可以尝试多次求平均值。

SR469-CASE 469-P5-HI-A20-E测量释放电压和释放电流：也是像上述那样连接测试，当继电器发生吸合后，再逐渐降低供电电压，当听到继电器再次发生释放声音时，记下此时的电压和电流，亦可尝试多次而取得平均的释放电压和释放电流。一般情况下，继电器的释放电压为吸合电压的10%~50%如果释放电压大小(小于1/10的吸合电压)，则不能正常使用，这样会对电路的稳定性造成威胁，使工作不可靠。

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