1747-L541/C

1747-L541/C

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2018-05-14 09:00:00
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1747-L541/C

1747-L541/C

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PLC  ,DCS  各系列品牌,只有您想不到的,没有我们没有的货 ,全系列自动化系统备件。
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主要用途:
 
1) 高电阻接地系统的接地过电流保护;
 
2)发电机定子绕组的接地保护;
 
3)分相发电机的层间短路保护;
 
4)接地变压器的过热保护。
 
6、 选择性接地继电器
 
选择性接地继电器,简称SG,又称方向性接地继电器,简称DG,使用于非接地系统作配电线路保护作用,架空线及电缆系统也能使用。
 
选择性接地继电器:由接地电压互感器检出零相序电流如遇线路接地时,选择性接地继电器能确实地表示故障线路而发生警报,并按照其需要选择故障线路将其断开,而继续向正常线路送电。
 
7、 缺相继电器
 
缺相继电器,简称OPR,或缺相保护继电器,简称PHR,在三相线路中,当电源端有一线断路而造成单相时,若未有立即将线路切断,将使电动机单相运转而烧毁。
 
8、比率差动继电器
 
比率差动继电器,简称RDR,被应用做变压器交流电动机,交流发电机的差动保护,以往使用过的过电流保护继电器,是外部故障所产生的异常电流流过保护设备时,若变压器,一、二次侧电流发生不平衡或对电流互感器特性发生不*,在这些情况下,此现象会扩延数倍,而使继电器误动作。
 
选用条件
 
1、先了解必要的条件
 
1)控制电路的电源电压,能提供的zui大电流;
 
2)被控制电路中的电压和电流;
 
3)被控电路需要几组、什么形式的触点。选用继电器时,一般控制电路的电源电压可作为选用的依据。控制电路应能给继电器提供足够的工作电流,否则继电器吸合是不稳定的。
 
2、查阅有关资料确定使用条件后,可查找相关资料,找出需要的继电器的型号和规格号。若手头已有继电器,可依据资料核对是否可以利用。zui后考虑尺寸是否合适。
 
3、注意器具的容积。若是用于一般用电器,除考虑机箱容积外,小型继电器主要考虑电路板安装布局。对于小型电器,如玩具、遥控装置则应选用超小型继电器产品。

按控制原理的不同,自动控制系统分为开环控制系统和闭环控制系统。
 


I/A Series Advantage Upgrade Paths 
 
From To (Lifecycle Phase) Adv. Upgrade   Part / Model #s Description 
 CP10 FCP270 P270 The Field Control Processor 270 (FCP270) is a distributed, optionally fault-tolerant, field-mounted controller module. The FCP270 performs regulatory, logic, timing, and sequential control together with connected Fieldbus Modules (FBMs). It also performs data acquisition and alarm detection and notification. The FCP270 connects to the MESH control network via standard fiber optic 100 Mbps Ethernet. The fault-tolerant version of the FCP270 consists of two processor modules. These modules install in adjacent FCP270 slots in a baseplate for high speed communication between the modules. The unique and patented fault-tolerant operation of the FCP270 greatly imrpoves reliability relative to other process controllers. The fault-tolerant version of the FCP270 consists of two modules operating in parallel, with two Ethernet connections to the MESH control network. The two FCP270 modules, married together as a fault-tolerant pair, provide continuous operation of the controller in the event of 
 
CP10 ZCP270 P270 The Z-Module Control Processor 270 (ZCP270) is an optionally fault-tolerant, Z-form factor controller. The ZCP270 performs regulatory, logic, timing and sequential control together with connected Fieldbus Communications Modules (FCMs) and Fieldbus Modules. It also performs data acquisition and alarm detection notification. The ZCP270 connects to the MESH control network and FCM 100Ets/FCM100Es via standard fiber optic 100 Mbps Ethernet. The FCM100Et interfaces the 2 Mbps Module Fieldbus used by the 200 Series FBMs and the FCM100E interfaces the 2Mbps Module Fieldbus used by the 200 Series FBMs or the 268 Kbps Fieldbus used by the 100 Series FBMs. Depending on sizing considerations, the ZCP270 can be used with a mix of FCM100E and FCM100Et modules. The fault-tolerant version of the ZCP270 consists of two single-width processor modules. These modules install in adjacent ZCP270 slots in a 1x8 or 2x8 mounting structure and connect to a fault-tolerant connector to allow for high-speed communication 
 
COMM15  + FDSI (Modbus, Profibus, OPC, Data Highway +) S61 The Foreign Device Systems Integrator (FDSI) allows a wide range of choices for users to link non-Foxboro devices into the I/A Series system ZCP & FCP 270 controllers. They area available with serial and Ethernet options, single and redundant links, and have approval ratings for corrosive and explosive environments. Communication channels are galvanically isolated for protection. These rugged, compact modules mount in standard, field-mounted I/A Series baseplates side-by-side with other system input/output Fieldbus Modules (FBMs). Like the other FBMs, their communication with the I/A Series system and controllers is through Foxboro's high-performance (100 Mbps/1Gbps), ultra-high availability field network. Each FDSI module can support up to 16 devices to read and write data, and up to 2,000 Distributed Control Interface (DCI) points. Ethernet versions can be fewer, depending upon 
AP10/20 P91 - Windows Server 2003 P91 As a multipurpose server running the Windows Server 2003 operating system with Service Pack 1, the Model P91 server supports 

 

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