CACR-UP20MAAB

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描述

CACR-UP20MAAB

 电动机保护的任务是保证电动机长期正常运行,避免由于各种故障造成电气设备、电网和机械设备的损坏,以保证人身的安全。保护环节是所有自动控制系统不可缺少的组成部分。这里讨论的是低压电路的保护。一般来讲、有常用的以下几种保护:短路保护、过电流保护、故保护及欠电压保护等。
    1.短路保护
    当电动机绕组的绝缘、导线的绝缘损坏时,或电气线路发生故障时,例如正转接触器的主触点未断开而反转接触器的主触点闭合都会产生短路现象。此时,电路中会产生很大的短路电流,它将导致产生过大的热量,使电动机、电器和导线的绝缘损坏。因此、必须在发生短路现象时立即将电源切断。常用的短路保护元件是熔断器和断路器。熔断器的熔体串联在被保护的电路中,当电路发生短路或严重过载时,它自动熔断,从而切断电路,达到保护的目的。断路器(俗称自动开关),它有短路、过载和欠电压保护功能。通常熔断器比较适用于对动作准确度要求不高和自动化程度较差的系统中。在发生短路时很可能造成一相熔断器熔断,造成单相运行;但对于断路器只要发生短路就会自动跳闸,将三相电路同时切断。断路器结构复杂,广泛用于要求较高的场合。

产品承诺:
保 证 全新原装进口,
保 证 安全准时发货,
保 证售后服务质量,
优势价格,大量现货。

主营DCS系统配件
机器人系统配件
大型伺服系统配件
品牌:ABB   ,AB  ,GE,FOXBORO,本特利,英维思,伍德沃德,西屋,瑞恩,施耐德,西门子,摩托罗拉,安川。力士乐。ACSO,横河等进口品牌。 专业销售进口DCS  PLC系统备件模块
Triconex Siemens Yaskawa ABB GE Ovation AB Foxboro Motorola Schneider XYCOM KUKA
  专业销售进口DCS  PLC系统备件模块 15天包退换 一年质保 大量现货  国内实力库存商家

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Newport 8’x5′ 1″-Grid Optical Breadboard Table w/Legs

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Shel-Lab Sheldon Bactron-X Anaerobic Incubator Chamber

ENI GHW-85A RF Plasma Generator Power Amplifier 8500W

Comdel CB5000 High Frequency RF Power Supply 5000W

Continuum NY60-50 Nd:YAG Laser +Power Supply/Controll​er

Fukuda Denshi UF-750XT Digital Ultrasound System Parts

HP Agilent E8404A VXI Mainframe+SM800​1 Switch Modules

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MCE IPS TES 8653D IC Chip Handler Pick & Place Setter

Comdel CX-10P RF High Frequency DC Power Source Supply

Carl Zeiss OPMI 6S Surgical Ophthalmic Microscope+Stan​d

DEC DEChub-900 MultiSwitch DECconcentrator​-900FH DEFHM

Vivato WiFi Outdoor Switch Wireless WLAN Antenna 2.4GHZ

Gendex/UAI Uni-Max 325 Chiropractic Imaging X-Ray Sys.

Trace Xantrex SW5548 Sine Wave Inverter Charger +GTI

Hirox MX-5030RZ II Rotational Microscope w/CT-1 Control

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Enlarge
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专业销售进口DCS  PLC系统备件模块

PLC模块,可编程控制器,CPU模块,IO模块,AI模块,通讯模块。AB/施耐德/ABB/GE/本特利/西屋/英维斯/霍尼韦尔/黑马/FU克斯波罗

15天包退换 一年质保 大量现货  国内实力库存商家


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。