描述
在靜態(tài)下,測a點(diǎn)的工作電壓應(yīng)為2.4v,若電壓不對即為該電路有問題,應(yīng)查找原因予以排除。r4為取樣電阻,若有問題也應(yīng)更換之。
過流保護(hù)的另一個(gè)原因就是缺相。當(dāng)變頻器輸入缺相時(shí),勢必引起母線電壓降低,負(fù)載電流加大,引起保護(hù)。而當(dāng)變頻器輸出端缺相時(shí),勢必使電機(jī)的另外兩相電流加大而引起過流保護(hù)。所以對輸入及輸出都應(yīng)進(jìn)行檢查,排除故障。
3、過、欠壓保護(hù)
變頻器出現(xiàn)過、欠壓保護(hù),大多是由于電網(wǎng)的波動(dòng)引起的,在變頻器的供電回路中,若存在大負(fù)荷電機(jī)的直接啟動(dòng)或停車,引起電網(wǎng)瞬間的大范圍波動(dòng)即會(huì)引起變頻器過、欠壓保護(hù),而不能正常工作。這種情況一般不會(huì)持續(xù)太久,電網(wǎng)波動(dòng)過后即可正常運(yùn)行。這種情況的改善只有增大供電變壓器容量,改善電網(wǎng)質(zhì)量才能避免。
當(dāng)電網(wǎng)工作正常時(shí),即在允許波動(dòng)范圍(380v±20%)內(nèi)時(shí),若變頻器仍出現(xiàn)這種保護(hù),這就是變頻器內(nèi)部的檢測電路出現(xiàn)故障了。一般過、
產(chǎn)品廣泛應(yīng)用于:電力、石油、礦井提升、港口、供熱、燃?xì)?、供水、污水處理、冶金、造紙、紡織、化工、水利等現(xiàn)代化工業(yè)領(lǐng)域!
我們這里有您急需的停產(chǎn)備件,
優(yōu)勢現(xiàn)貨,詢不到的,買不到的,請聯(lián)系我們!
絕 對優(yōu)勢,絕 對低價(jià)!絕 對正品,優(yōu)質(zhì)的產(chǎn)品,一流的服務(wù),充足的庫存,
歡迎來電詢價(jià),我們將會(huì)給您最優(yōu)惠的價(jià)格!
主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
FITS ABB REVERSING CONTACTOR 120V COIL REV-EH210-120V
ABB AINT12C
ABB EXCOUNT-II SENSOR 868 MHZ advanced surge arrester
New FS ABB Remote I/O Board YB560103-CH/10#28882
ABB DCF504A0050 Field Power Supply for DCS drives
ABB Field Bus Controller 6227BZ10200
ABB SDCS-CON-3A
ABB/TAYLOR 1922RA00103A/19?22RB00103A RECORDER
ABB DSQC-249B SERVO AMPLIFIER
ABB DSQC-236T AXIS CONTROLLER BOARD
ABB Drive-Sami GS ACS501-006-3-00?P20000D
ABB,TYPE JS CIRCUIT BREAKER,300 A,500 VD
ABB ACS501-007-4-00?P5 7.5HP 460V AC DRIVE
ABB ACS601-0016-2-S?00B1200801 10HP AC DRIVE
ASEA Brown Boveri,ABB DSPC 153 A
ASEA Brown Boveri,ABB YTEA 250-8
ABB ACH 500 VFD Variable Frequecy Drive
ABB DCS500 SDCS-CON-1 CPU Board
ABB ASEA 5716 0001-K 57160001K DSDO-110 DSDO110 NEW
ABB 52608317 Photo Amplifier Board Ulma 2020 Stromberg
NEW FITS ABB EH370 EH 370 MAGNETIC CONTACTOR AC COIL
FITS ABB REVERSING CONTACTOR 120V COIL REV-EH175-120V
ABB ACH 500 VFD Variable Frequecy Drive
ABB isomax 250 amp Breaker S4N250-BW,250a s4n 250 b
AB 1326AB-B515G-21 1326ABB515G21 SERVO MOTOR 460V*NEW
ABB BIFAS34
ABB APIOS-02 PC BOARD 1 YEAR WARRANTY
ABB/ASEA YYT-102C PC BOARD
ABB KABLAGE ROTATOR AXIS 4 COMPL 3HAA-2121-3~NS
ABB Assembly Cable 3HAB 6139-1/3HAB6139-1
ABB S7H1000B Circuit Breaker,1000 Amp,65 kAIR,NEW!
ABB ACH 500 Adjustable Frequency AC Drive
NIB ABB NF32X-6PB6A ENCLOSED DISCONNECT SWITCH 40 AMP
ABB KOR15-C CURRENT TRANSFORMER NEW
ABB VOY-12 VOLTAGE TRANSFORMER NEW
ABB 3HAA3560-HXA S3 TEACH PENDANT TESTED
ABB 63985317 Drive Control Unit NDCU-21
ABB AM54072 DIN 25 Armored Variable
ALLEN BRADLEY 1326AB-B2E-11 USPP 1326ABB2E11
ABB,ABB Robot,DSQC 335,3HAB 6182-1,
New ABB Memory Board DSQC 317#28968
ABB,ABB Robot,DSQC 322,3HAB 5960-1
ASEA Brown Boveri ABB YM321001-Z Signal PCA PCB NNB
ABB A210-30-11 3-Pole Block Control Contactor NEW NIB
ABB Low Voltage Air Breaker Circuit Breaker 1600 A
ABB ELMO 3HAB4044-1 SERVO MOTOR 3HAB40441
RANSBURG ABB MODEL 74794-02 CASCADE 300 NEW
ALLEN BRADLEY 1326AB-B515E-21 USPP 1326ABB515E21
ALLEN BRADLEY 1326AB-B515G-21 USPP 1326ABB515G21
ABB 3HAB 2213-1/2 DSQC 313 Module DSQC Serial Measure
ABB 3HAB 2213-1/1 DSQC 313 Module DSQC Serial Measure
ABB Communication Interface 3BSE009799R1
One-day shipping available
ABB Inverter ACS510-01-025A-?4(ACS51001025A4)NIB
ABB 3BSE030220R1 CI854AK01 Profibus DP/V1 Interface NEW
ABB 57411546 Chopper Control Board SAFT 125 CHC New
ABB DSQC 324 16MB Memory Board 3HAB 5957-1/3
Abb/Westinghous?e Current transformer Style-KOR-60 300A
NEW ABB DSQC 266G 3HAB8801-1/2B ROBOT CONTROL BOARD
ABB EH300 Contactor
ABB/SACE Breaker(UXAA1554 3800 1 LN320 R200)
ABB BOARD 3BSC 980 006 R109
ABB ACS550 23 Amp Drive Part#ACS550-U1-023A-?4 Used
ABB ACS 800 U1-0009-5+P901
ABB Motor M2AA180M 3GAA182111-BDA 118KG NEWinbox
ABB DSQC 249B/3HAA3563-A?HA/1 SERVO AMPLIFIER
ASEA Brown Boveri,ABB YTEA 250-8
PC323 ABB
ABB S6NQ600BW MAIN CIRCUIT BREAKER
ABB YB-560-103-BE/2 DSQC 224
ABB DCS Freelance2000 DAI 03 DAI03
ABB OES-200 J3 Disconnect Switch With Fuses
3HAC3939-4 ABB
ABB S6HQ600EW Breaker,600 Amp,65 kAIR,LSIG,NEW!
ABB Motor Drive ACS501-010-4-00?P2,10HP,#20636
New ABB System Board 3HAB2211-1 DSQC256A#29408
ABB ASEA 5716 0001-ACA 57160001-ACA DSDI-120A NEW