新荣区批发韩国Autovalve阀门AD40-10F-S/V-L/S中山立讯电气有限公司直销中山立讯电气有限公司销售韩国DONGYANG F&C 氢氧化钠自动阀
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DONGYANG F&C 氢氧化钠自动阀
LCD-1000S LCD-1100S LCD-1200S LCD-1300S LCD-1400S LCD-1500S
LCD-2000S LCD-2100S LCD-2200S LCD-2300S LCD-2400S LCD-2500S
LCD-3000S LCD-3100S LCD-3200S LCD-3300S LCD-3400S LCD-3500S
LCD-1010S LCD-1110S LCD-1210S LCD-1310S LCD-1410S LCD-1510S
LCD-2010S LCD-2110S LCD-2210S LCD-2310S LCD-2410S LCD-2510S
LCD-3010S LCD-3110S LCD-3210S LCD-3310S LCD-3410S LCD-3510S
LCD-1020S LCD-1120S LCD-1220S LCD-1320S LCD-1420S LCD-1520S
LCD-2020S LCD-2120S LCD-2220S LCD-2320S LCD-2420S LCD-2520S
LCD-3020S LCD-3120S LCD-3220S LCD-3320S LCD-3420S LCD-3520S
LCD-1001S LCD-1101S LCD-1201S LCD-1301S LCD-1401S LCD-1501S为0.1秒,不能有效地保护晶闸管)。设计时可依据厂家提供的产品样本,根据软起动器的额定电流选择相应的快熔断器。3)当软起动器使电机制动停机时,只是晶闸管不导通,在电机与电源之间并没有形成电气隔离。如果此时检修软起动器之后的线路、电机,那是不的。所以在电机一次控制回路中应在软起动器之前增加断路器。4)由于信息及网络技术的飞速发展,现代的楼宇特别是智能建筑中电子设备日益增多,它们对电网的质量有较高的要求。而由于软起动器采用了可控硅等非线性器件,所以当软起动器功率较大或者台数较多时,产生的高次谐波将对电网造成不良的影响并对建筑物内的电子设备产生干挠。此时可装设旁通接触器。在软起动器使电机平稳起动至正常转速后。
LCD-2001S LCD-2101S LCD-2201S LCD-2301S LCD-2401S LCD-2501S
LCD-3001S LCD-3101S LCD-3201S LCD-3301S LCD-3401S LCD-3501S
LCD-1011S LCD-1111S LCD-1211S LCD-1311S LCD-1411S LCD-1511S
LCD-2011S LCD-2111S LCD-2211S LCD-2311S LCD-2411S LCD-2511S
LCD-3011S LCD-3110S LCD-3211S LCD-3311S LCD-3411S LCD-3511S
LCD-1021S LCD-1121S LCD-1221S LCD-1321S LCD-1421S LCD-1521S
LCD-2021S LCD-2121S LCD-2221S LCD-2321S LCD-2421S LCD-2521S
LCD-3021S LCD-3121S LCD-3221S LCD-3321S LCD-3421S LCD-3521S
LCD-1002S LCD-1102S LCD-1202S LCD-1302S LCD-1402S LCD-1502S
LCD-2002S LCD-2102S LCD-2202S LCD-2302S LCD-2402S LCD-2502S
LCD-3002S LCD-3102S LCD-3202S LCD-3302S LCD-3402S LCD-3502S
新荣区批发韩国Autovalve阀门AD40-10F-S/V-L/S通道间全隔离,隔离电压大于400V◇输出规格8路报警输出、2路485输出,其他可定制配电:12路配电,4组24VDC输出,输出电流50mA/组12路可组态继电器触点输出,触点容量为3A、250VAC(阻性负载)默认为常开触点多4路模拟量变送输出,4~20mADC,负载电阻小于600Ω◇显示器144*144彩色液晶显示屏,带背光,宽视角◇基本误差±0.2%F·S◇补偿运算蒸汽:根据IFC67公式计算蒸汽密度补偿蒸汽的质量流量一般气体:温度、压力补偿测量标准体积流量天然气:温度、压力补偿测量标准体积流量液体:温度补偿测量标准体积流量或质量流量蒸汽:压力0.1~4.5MPa温度100~500℃密度0.1~100Kg/m3比焓2508~3224Kj/Kg一般气体:压力0~60MPa温度-100~500℃液体:温度-100~500℃◇累积范围0~99999999◇通讯、打印通讯接口:RS232C或RS485波特率:19200打印接口:RS232C串口微型打印机10MEthernet标准RJ45接口◇记录时间记录间隔:240秒可选记录长度:36小时/笔(记录间隔1秒)~360天/笔(记录间隔4分)记录间隔1秒2秒5秒10秒15秒1分钟2分钟4分钟记录长度72小时6天15天30天45天180天360750天◇数据备份和转存2G~4G优盘可选(USB接口)◇热电偶冷端补偿误差±1℃◇断电保护内置FLASH存储器。
LCD-1012S LCD-1112S LCD-1212S LCD-1312S LCD-1412S LCD-1512S
LCD-2012S LCD-2112S LCD-2212S LCD-2312S LCD-2412S LCD-2512S
LCD-3012S LCD-3110S LCD-3212S LCD-3312S LCD-3412S LCD-3512S
LCD-1022S LCD-1122S LCD-1222S LCD-1322S LCD-1422S LCD-1522S
LCD-2022S LCD-2122S LCD-2222S LCD-2322S LCD-2422S LCD-2522S送入运算回路,根据指令和运算可使电动机按指令速度运转。(5)保护电路:检测主电路的电压、电流等,当发生过载或过电压等异常时,为了防止逆变器和异步电动机损坏。功能作用变频节能变频器节能主要表现在风机、水泵的应用上。风机、泵类负载采用变频调速后,节电率为20%~60%,这是因为风机、泵类负载的实际消耗功率基本与转速的三次方成比例。当用户需要的平均流量较小时,风机、泵类采用变频调速使其转速降低,节能效果非常明显。而传统的风机、泵类采用挡板和阀门进行流量调节,电动机转速基本不变,耗电功率变化不大。据统计,风机、泵类电动机用电量占全国用电量的31%,占工业用电量的50%。在此类负载上使用变频调速装置具有非常重要的意义。或可采用高速可控硅(晶闸管)。关于连续峰值开路电压VDRM在电源不正常的情况下,可控硅(晶闸管)两端的电压会超过连续峰值开路电压VDRM的值,此时可控硅(晶闸管)的漏电流增大并击穿导通。如果负载能允许很大的浪涌电流,那么硅片上局部的电流密度就很高,使这一小部分先导通。导致芯片烧毁或损坏。另外白炽灯,容性负载或短路保护电路会产生较高的浪涌电流,这时可外加滤波器和钳位电路来防止尖峰(毛刺)电压加到双向可控硅(晶闸管)上[2]。
LCD-3022S LCD-3122S LCD-3222S LCD-3322S LCD-3422S LCD-3522S
LCD-1003S LCD-1103S LCD-1203S LCD-1303S LCD-1403S LCD-1503S
LCD-2003S LCD-2103S LCD-2203S LCD-2303S LCD-2403S LCD-2503S
LCD-3003S LCD-3103S LCD-3203S LCD-3303S LCD-3403S LCD-3503S
LCD-1013S LCD-1113S LCD-1213S LCD-1313S LCD-1413S LCD-1513S
LCD-2013S LCD-2113S LCD-2213S LCD-2313S LCD-2413S LCD-2513S
LCD-3013S LCD-3110S LCD-3213S LCD-3313S LCD-3413S LCD-3513S
LCD-1023S LCD-1123S LCD-1223S LCD-1323S LCD-1423S LCD-1523S
LCD-2023S LCD-2123S LCD-2223S LCD-2323S LCD-2423S LCD-2523S
LCD-3023S LCD-3123S LCD-3223S LCD-3323S LCD-3423S LCD-3523S
LCD-1004S LCD-1104S LCD-1204S LCD-1304S LCD-1404S LCD-1504S
LCD-2004S LCD-2104S LCD-2204S LCD-2304S LCD-2404S LCD-2504S
LCD-3004S LCD-3104S LCD-3204S LCD-3304S LCD-3404S LCD-3504S
LCD-1014S LCD-1114S LCD-1214S LCD-1314S LCD-1414S LCD-1514S
LCD-2014S LCD-2114S LCD-2214S LCD-2314S LCD-2414S LCD-2514S
LCD-3014S LCD-3110S LCD-3214S LCD-3314S LCD-3414S LCD-3514S
LCD-1024S LCD-1124S LCD-1224S LCD-1324S LCD-1424S LCD-1524S
LCD-2024S LCD-2124S LCD-2224S LCD-2324S LCD-2424S LCD-2524S
LCD-3024S LCD-3124S LCD-3224S LCD-3324S LCD-3424S LCD-3524S
同时由于起动转矩较大,将对负载产生冲击,增加传动部件的磨损和额外维护。所以当电机的容量较大(一般为超过电源容量的20%—30%时)均采用降压起动。传统上采用的降压起动的方法有Y/△换接起动和自耦变压器降压起动。虽然这两种起动方式均可降低起动电流,但是在降压起动过程完成后的分档投切和加全压的瞬间,仍将产生数倍额定电流的尖峰电流(二次冲击电流),此电流将对配电系统造成冲击,同时产生的破坏性的动态转矩会引起水泵电机的机械震动,对电机的转子、中间齿轮等非常有害,并使供电线路电耗增大。软启动器也是降压起动器的一种。它是利用性能先进的微处理器,合理有序地控制大功率晶闸管组件导通,使之产生逐步增加的平滑的交流电压加在交流电动机上。一般可借助于用户界面工具箱(Userinterfacetoolkits)或用户界面开发系统(Userinterfacedevelopmentsystems)提供的现成的模块或对象创建各种界面基本成分的工作。在人机界面分析设计中所要考虑的人文因素主要包括以下内容:1)人机匹配性:用户是人,计算机系统作为人完成任务的工具,应该使计算机和人组成的人机系统很好地匹配工作;如果有矛盾,应该让计算机去适应人,而不是人去适应计算机;2)人的固有技能:作为计算机用户的人具有许多固有的技能。对这些能力的分析和综合,有助于对用户所能胜任的,处理人机界面的复杂程度,以及用户能从界面获得多少知识和帮助,以及所化费的时间做出估计或判断;