140CPS11100 庫存有貨

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描述

140CPS11100

? ? 熱繼電器(FR)主要用于電力拖動系統(tǒng)中電動機負(fù)載的過載保護。
? ? 電動機在實際運行中,常會遇到過載情況,但只要過載不嚴(yán)重、時間短,繞組不超過允許的溫升,這種過載是允許的。但如果過載情況嚴(yán)重、時間長,則會加速電動機絕緣的老化,縮短電動機的使用年限,甚至燒毀電動機,因此必須對電動機進行過載保護。
? ? 繼電器結(jié)構(gòu)與工作原理熱繼電器主要由熱元件、雙金屬片和觸點組成,如圖l所示,熱元件由發(fā)熱電阻絲做成。雙金屬片由兩種熱膨脹系數(shù)不同的金屬輾壓而成,當(dāng)雙金屬片受熱時,會出現(xiàn)彎曲變形。使用時,把熱元件串接于電動機的主電路中,而常閉觸點串接于電動機的控制電路中。
當(dāng)電動機正常運行時,熱元件產(chǎn)生的熱量雖能使雙金屬片彎曲,但還不足以使熱繼電器的觸點動作。當(dāng)電動機過載時,雙金屬片彎曲位移增大,推動導(dǎo)板使常閉觸點斷開,從而切斷電動機控制電路以起保護作用。熱繼電器動作后一般不能自動復(fù)位,要等雙金屬片冷卻后按下復(fù)位按鈕復(fù)位。熱繼電器動作電流的調(diào)節(jié)可以借助旋轉(zhuǎn)凸輪于不同位置來實現(xiàn)。
? ? 熱繼電器的型號及選用
? ? 我國目前生產(chǎn)的熱繼電器主要有JR0、JR1、JR2、JR9、R10、JRl5、JRl6等系列,JRl、JR2系列熱繼電器采用間接受熱方式,其主要缺點是雙金屬片靠發(fā)熱元件間接加熱,熱偶合較差;雙金屬片的彎曲程度受環(huán)境溫度影響較大,不能正確反映負(fù)載的過流情況。
? ? JRl5、JRl6等系列熱繼電器采用復(fù)合加熱方式并采用了溫度補償元件,因此較能正確反映負(fù)載的工作情況。
? ? JRl、JR2、JR0和JRl5系列的熱繼電器均為兩相結(jié)構(gòu),是雙熱元件的熱繼電器,可以
? ? 用作三相異步電動機的均衡過載保護和Y聯(lián)結(jié)定子繞組的三相異步電動機的斷相保護,但不能用作定子繞組為△聯(lián)結(jié)的三相異步電動機的斷相保護。
? ? JRl6和JR20系列熱繼電器均有帶有斷相保護的熱繼電器,具有差動式斷相保護機構(gòu)。熱繼電器的選擇主要根據(jù)電動機定子繞組的聯(lián)結(jié)方式來確定熱繼電器的型號,在三相異步電動機電路中,對Y聯(lián)結(jié)的電動機可選兩相或三相結(jié)構(gòu)的熱繼電器,一般采用兩相結(jié)構(gòu)的熱繼電器,即在兩相主電路中串接熱元件。對于三相感應(yīng)電動機,定子繞組為△聯(lián)結(jié)的電動機必須采用帶斷相保護的熱繼電器。熱繼電器的圖形及文字符號

ABB SPECTRUM EHDB 360 EHDB360 360A DRIVE 120V COIL NEW

ABB SPECTRUM EHDB 650 EHDB650C1L 650A DRIVE CONTACTOR

ABB EHDB 650 Spectrum Drive Contactor 600VDC 650A

ABB EHDB220C-1L DRIVE CONTACTOR 3 POLE 220AM

ABB SK825484-AF CONTACTOR EHDB220-20-11

ABB EHDB 360

ABB EHDB 280 EHDB280C2P-1L 280A DC 120V coil * NEW

ABB SK824084-AF CONTACTOR EHDB130-20-11

ABB EHDB360C2P-1L 2 Pole Contactor Brand New 360 Amps

ABB Drive Contactor EHDB 130 EHDB130 EHDB-130 240VDC

MOORE PROCESS CONTROLLER 353A2F1NNNNNNAW

MOORE NULLMATIC CONTROLLER MODEL No. 561M NEW

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SIEMENS MOORE 320A2NNF DIGITAL CONTROLLER

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MOORE DIFFERENTIAL FLOW CONTROLLER 2882S10DL (NIB)

Moore/Siemens 353A4F1NNNNNNA4 Controller

Moore 352 controller

MOORE PRODUCTS 509M NULLMATIC CONTROLLE

MOORE 535-2111000000 535 PROCESS CONTROLLER POWERTUNE

3 NEW Moore Flow Controller-Constant Differential Type

5 Moore Flow Controller 63S Constant Differential Type

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GM TOOL IDLE AIR CONTROLLER IAC MOTOR DRIVER

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Moore Liquid Level Controller Control 271s15tc 158904s2

MOORE NULLMATIC CONTROLLER 50MX-2 50MX2 14281-119S3

MOORE DIFFERENTIAL FLOW CONTROLLER 2882S10DL (NIB)

MOORE NULLMATIC CONTROLLER 524MT2

MOORE NULLMATIC CONTROLLER 509MH

MOORE PRODUCTS / NULLMATIC CONTROLLER 569MFW 524MT2

Moore Process Controller 535-210000000 new

Moore Products Co 352EA21NNF Controller USED

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MOORE EQUATION STATION CONTROLLER MDS/PRG/PRG/10-30DC

MOORE TRANSMITTER CONTROLLER 340G3BH22B5 T530 DIAPHRAGM

MOORE 353 AUTO PROCESS CONTROLLER 353A2FNNNLNNNA4 240V

MOORE PRODUCTS 352EA21NNF PROCESS CONTROLLER BOARD

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MOORE PRODUCTS 320A2NNN CONTROLLER BOARD TRANSMITTER

Moore Nullematic Syncro III Controller 502 *A13

MOORE 352E/372 PRESSURE CONTROLLER DIGITAL SINGLE-LOOP

MOORE INSTRUMENTS 63SU DIFFERENTIAL FLOW CONTROLLER

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MOORE INSTRUMENTS 63SD DIFFERENTIAL FLOW CONTROLLER

Moore Constant Differential Type Flow Controller 63BD

MOORE NULLMATIC CONTROLLER MODEL 503

Moore Model 340G XTC Transmitter Controller 3 Pcs

Moore 503 Nullmatic Controller ; *A13

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(2) Moore 63A Constant Differential Flow Controller

MOORE 502F Pneumatic Controller New NIB

Moore 63BD-L Constant Differential Flow Controller

Moore Model 63A Constant Differential Flow Controller

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Moore 14499-88 Transmitter Controller B/M K70260-1 New

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Moore 14490-9 Transmitter Controller B/M14490-9 New

Moore 14888-3 Transmitter Controller B/M14888-3 New

Moore 502 Nullmatic Controller B/M K62734-001 New

Moore Controller 15214-21 NIB

M Moore 15219-1 PLC Logic Controller 152191

Moore Digital Panel Controller Model 352

Moore Nullmatic Two-Mode Pneumatic Controller 561-MFW

Moore Nullmatic Two-Mode Pneumatic Controller 502

NEW – Lot of 2 – Moore Flow Controller 63BU/M188

MOORE SYNCRO CONTROLLER BOX 528PM NEW IN BOX

MOORE SYNCRO CONTROLLER BOX 528RC5M-2F M48307-001

MOORE SYNCRO CONTROLLER BOX 528C3M 14803-/7KK

MOORE SYNCRO CONTROLLER BOX 528C3M NEW IN BOX

MOORE SYNCRO CONTROLLER BOX 528C3M2 NEW IN BOX

Moore 340 XTC Pressure/Controller *NEW*

383VA21N1F MOORE CONTROLLER – 1 YEAR WARRANTY – NIB

Moore XTC Transmitter Controller PN 340G4AH22BNNN13

Moore XTC Transmitter Controller PN 340D3AH12PNNN13

MOORE 348 FIELDPAK CONTROLLER – DEMO UNIT

15900-389 16300-503 MOORE CONTROLLER FEEDBACK KIT – NIB

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MOORE 535 PROCESS CONTROLLER 535-211500D000 V4.02

MOORE SYNCRO CONTROLLER BOX 528C3M 14480-251 NEW

MOORE SYNCRO CONTROLLER BOX 3601A2N 15250-6 NEW

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Moore Nullmatic Controller 50 MFY M24609-001 * NEW *

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MOORE IND. RIY/R0-0-250F/4-20MA/12-42DC CONTROLLER NEW!

NEW Moore Products Nullmatic Controller 55MX-2 55MX2

Moore Products 352 Digital Controller Model 352EANNNNF

M Moore 15221-11 PLC Logic Controller 1522111

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M Moore 15431-41-13 PLC Logic Controller 154314113

M Moore 15431-31-16 PLC Logic Controller 154313116

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M Moore 15431-31-13 PLC Logic Controller 154313113

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M Moore 15212-1-22 PLC Logic Controller 15212122

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M Moore 15212-11 PLC Logic Controller 1521211

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選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,福克斯波羅、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習(xí)整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會一種至于其它的學(xué)習(xí)起來也就簡單了。