描述
但零序过流保护受电力系统运行方式变换影响较大，灵敏度因此降低，特别是短距离线路上以及复杂的环网中，由于速动段的保护范围太小，甚至没有保护范围，致使零序电流保护各段的性能严重恶化，使保护动作时间很长，灵敏度很低。
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主营：世界知名品牌的PLC、DCS系统备件模块
①Allen-Bradley(美国AB)系列产品》
②Schneider(施耐德电气)系列产品》
③General electric(通用电气)系列产品》
④Westinghouse（美国西屋）系列产品》
⑤SIEMENS(西门子系列产品)》
⑥销售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse（西屋）：OVATION系统、WDPF系统、MAX1000系统备件。
⑧Invensys Foxboro（福克斯波罗）：I/A Series系统，FBM（现场输入/输出模块）
顺序控制、梯形逻辑控制、事故追忆处理、数模转换、输入/输出信号处理、数
据通信及处理等。Invensys Triconex:冗余容错控制系统、基于三重模件冗余（TMR）
结构的zui现代化的容错控制器。
⑨Siemens(西门子)：Siemens MOORE，Siemens Simatic C1，Siemens数控系统等。
⑩Bosch Rexroth（博世力士乐）：Indramat，I/O模块,PLC控制器,驱动模块等。
◆Motorola（摩托罗拉）：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)0190-08770
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 6ES7353-1AH01-0AE0
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-B2
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)MB3M87-025944-12
APPLIED MATERIALS(AMAT)CLAMP RING 6″P/N 0020-27667
TEL ASSY,HTR SHOWER HEAD 1(TIN)MB3M87-025943-12
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 CT1380-101436-11
AMAT SUSCEPTOR,ASSY LIFT 0010-09340
NOVELLUS WINDOW,INNER VIEWPORT WCVD300
SONDERMANN PUMP,ELEC.RM-PP-12-150-30S
ADVANTEST AMERICA PCB CLAMP BGM-021556
ADVANTEST PCB,TGFC SLOTS19-21-REPAIR BIR-021939X02
TEL PLATE,SHOWER HTR 1S0L OUT1 MB3M10-310185-11
TEL PLATE,SHOWER HTR 1S0L OUT2 MB3M10-310186-11
TEL ASSY,HTR INLET BLOCK P(TIN)MB3M87-029127-12
NOVELLUS GUARD,DISK LTM NO PKT 15-310935-00
AMAT KIT,PC XT LOWER SHIELD 300MM ENDURA0242-33276
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