描述
但零序過流保護(hù)受電力系統(tǒng)運(yùn)行方式變換影響較大,靈敏度因此降低,特別是短距離線路上以及復(fù)雜的環(huán)網(wǎng)中,由于速動(dòng)段的保護(hù)范圍太小,甚至沒有保護(hù)范圍,致使零序電流保護(hù)各段的性能嚴(yán)重惡化,使保護(hù)動(dòng)作時(shí)間很長(zhǎng),靈敏度很低。
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主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)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(guó)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(福克斯波羅):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場(chǎng)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。
AMAT MFC PRIM.PN980 30SCCM SIF4 DNET NC H 3030-10339
AMAT MFC PRIMA PN980 50SCCM SIH4 DNET NC H 3030-10341
AMAT MFC PRIMA PN980 3SLM NF3 DNET NC HOV 3030-10531
AMAT MFC PRIMA PN980 100SCCM AR DNET NC 5R 3030-10537
VARIAN ELECTRODE,SUPRESSION INSERT E17273990
SEMITOOL MOTOR,SERVO SIGMA II 100WATT ABSOLUTE
APPLIED MATERIALS(AMAT)SERVICE KIT Coherent 8010-1077
AMAT CONTROL 30-3(FIXLOAD)0190-0?8770
SEMITOOL VACUUM END EFFECTOR P/N T97000-41-NEW
VARIAN TOUCHPANEL,AS2000 SCRUB,AC100V 40W UT3-F1AE-B
GSI LUMONICS PCB,SCANBUFFER 450-0080-004 250-0076-002
GSI LUMONICS POWER SUPPLY,LASER ASSEMBLY 2860294-503
USHIO CONTROLLER,FA 9706024/U00
ULVAC TECHNOLOGIES EM1336-150-03 12″DUMMY WAFER
OLYMPUS BX2 TURRET-NEW
AXCELIS WAFER,HOLDER BELLOWS 1906890
SYSTEMS INT PCB,OS4 66LD DDRSDRAM2&T 01079-80019 REV C
EBARA RING,TOP C-8812-043-0001
IWAKI CO.PUMP,200V IWAKI MD-30RZ-200N02
DISCO HI-TEC PCB,ANALOG OUTPUT 1024-03-010(-8)REV D
SYSTEMS INTEGRATION PCB OS4 66L SDRAM 01079-80014 REV C
STI CAMERA ADIMEC TY EXTENSION ADIMEC-1000M/D_?ST
IAI ACTUATOR SPINDLE LIFT 12R2-100-250B
SIEMENS DRIVER FM 353 F STEPPER MOTO 6ES7353-1AH01-0?AE0
SUNX LASER LINE SENSOR LD-600
COGNEX 4400 VISION CONTROL BOARD FRAME GRABBER 4438-002
AXCELIS BELLOWS,CHUCK HOLDER 1906900
DNS ARM,UPPER ROBOT 80B 2-F3-90665
MOOG SERVO VALVE J661-709
APPLIED MATERIALS(AMAT)TARGET LIFT,200mm 0040-46602
TERADYNE PCB TG MOD 100MHZ 950-570-13D 9336 I709 G709
KLA DAGE-MTI IVS CAMERA NC-68DX
AMAT FLEXURE,HEAD ASSEMBLY 0040-46602
APPLIED MATERIALS(AMAT)WAFER LIFT ASSY A,COOLDOWN
AMAT DETECTOR CABLE w/BraidBr eakout,41Ft w 0190-A1152
TEL QUARTZ,HOUSING 300MM DIFFUSION DS3805-120037-B?2
AMAT ELECTRODE FOCUS TWIN F/THRO R340 0020-49487
SHINYEI TRANSMITTER HUMIDITY/TEMP 2-39-60027 THT-B110
ULVAC TECHNOLOGIES EM2356-664-04 PLATEN RING
AMAT V17/V20 ASSY 0010-c5910 MKS 99E1234
AMAT KIT,SLOW PUMP LLC 0225-30754
TEL ASSY,HTR SHOWER HEAD 2(TIN)MB3M87-025944-1?2
APPLIED MATERIALS(AMAT)CLAMP RING 6″P/N 0020-27667
TEL ASSY,HTR SHOWER HEAD 1(TIN)MB3M87-025943-1?2
AMAT CPU PCBA,ADO-E 0190-09786
KOMATSU ELECTRONICS FR-521C POWER SUPPLY(DNS)
AMAT RING,DEPOSITION,8″JMF,TI/TIN,HTESC 0021-21890
GOULDS PUMP DI WATER W MOTOR 2SVC1G5E0 X4188700 250802
AMAT ITU Motion Driver,I4 0090-A9231
DNS SENSOR,AIR FLOW UNIT FOR SPI 2-39-63528 F5801C
AMAT MANIFOLD OUT,RIGHT CHAMBER LID PMD PRO 0040-51824
AUGUST PCB,NSX 105 MEI DAU BOARD TEST ASSY 706765
APPLIED MATERIALS(AMAT)PRIMARY REFLECTOR 0200-05358
AMAT WFB ASSY,CDM4Wafer Bias 0090-A0701
AMAT Sensor,Light Curtain Emitter,28″1400-00010
BANNER MICRO-SCREEN SENSOR,LIGHT CURTAIN EMITTER,28″
TEL BOARD CN-BASE2 SC/IF CT1380-101436-1?1
AMAT SUSCEPTOR,ASSY LIFT 0010-09340
NOVELLUS WINDOW,INNER VIEWPORT WCVD300
SONDERMANN PUMP,ELEC.RM-PP-12-150-30?S
ADVANTEST AMERICA PCB CLAMP BGM-021556
ADVANTEST PCB,TGFC SLOTS19-21-REPA?IR BIR-021939X02
TEL PLATE,SHOWER HTR 1S0L OUT1 MB3M10-310185-1?1
TEL PLATE,SHOWER HTR 1S0L OUT2 MB3M10-310186-1?1
TEL ASSY,HTR INLET BLOCK P(TIN)MB3M87-029127-1?2
NOVELLUS GUARD,DISK LTM NO PKT 15-310935-00
AMAT KIT,PC XT LOWER SHIELD 300MM ENDURA0242-3327?6