6ES5948-3UR23

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描述

6ES5948-3UR23

浪涌（surge），又称为电涌、突波，是指瞬间超出稳定值的峰值，包括浪涌电压和浪涌电流。
供电系统的浪涌主要来自两方面的原因：外部（雷电原因）和内部（电气设备启停和故障等）。浪涌的特点往往是时间很短（雷电造成的过电压往往在微秒级，电气设备造成的过电压往往在毫秒级），但是瞬时的电压和电流极大，极有可能对用电设备和电缆造成危害，所以需要浪涌保护器对它们进行保护。
浪涌保护器，英文名SurgeProtectiveDevice，简称SPD，是一种为各种电子设备、仪器仪表、通讯线路提供安全防护的电子装置，主要用于限制过电压和泄放电涌电流。浪涌保护器一般是与被保护的设备并联，当产生过电压时，可以起到分流和限压的效果。防止过大的电流与电压对设备产生损害。
浪涌保护器的核心元件是内部的一个非线性元件。根据非线性元件的不同，浪涌保护器可以分为开关型（核心元件主要为放电间隙）和限压型（核心元件主要为压敏电阻）。
放电间隙和压敏电阻的工作原理虽然有差异，但是基本的特性非常相似：在没有过电压时，他们的阻抗都非常高，一般是兆欧级，几乎相当于断路。当出现过电压时，阻抗迅速下降到几欧，浪涌电流就会通过浪涌保护器流入地，而不会进入设备，同时，由于浪涌保护器的这时的阻抗很小，它的两遍电压也比较小，同时因为他和被保护的设备并联，也就防止设备承受较大的浪涌电压。这样，就起到了泄流和限压的效果。

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选择深圳长欣，选择放心，售后无忧大量现货，当天顺丰发货！
主营：本特利，英维思，伍德沃德，福克斯波罗、西屋、瑞恩、施耐德莫迪康、ABB、AB、西门子、摩托罗拉、GE发那科、安川、博世力士乐，ACSO，力士乐等各大品牌的DCS系统配件，机器人系统配件，大型伺服系统备件。

先介绍几点经验。
1、先通读一遍“系统手册”（不管能不能看懂，先了解个大概，以便学习编程时查找）；
2、由位控逻辑入手，逐渐增加定时、计数等条件，把或、与、非关系理顺；
3、进而练习整数运算、实数运算、类型转换；
4、量程转换、PID调节回路的建立及P、I、D参数的理解（最好是有个物理回路验证，比如变频器+电机+测速传感器）；
5、循环、顺序、跳转等程序控制（尽量避免跳转，非跳不可时也是跳的越近越好）；
6、中断、通讯、位置控制....

本人以ABB工业机器人配件DSQC系列和Motorola MVME系列，GE 卡件 模块 驱动器系列为主攻。各位电工朋友可根据自己的条件选择适合自己的PLC品牌，由于PLC的基本框架大同小异，学会一种至于其它的学习起来也就简单了。

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