描述
当某个交流节点和接地点相通时,这一侧就会发生单点接地的情况,进而使得直流侧发生闭合,并且由于系统中的电阻是很大的,所以即使接地,所产生的电流也是很小的,在这种情况下,接地电流受到闭合的影响,因此大小和方向都会发生变化,并且随着时间发生周期性改变,电流不平衡。
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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 FLANGE,THROTTLE VALVE 200MM SACVD PROD 0021-02818
TEL 46HEATER,80A,.38103244491 DS3810-325138-12
SIEMENS ELMO-G GAS RING VACUUM PUMP/COMP 2BH1500 1AK12
DNS PCB,INDEXER 80B 2-VC-34410
ETA ALTRAC POWER SUPPLY,600W 48V/13.5A FHG48SX-U
SUNX LASER LINE SENSOR CONTROLLER,LD-C60
SANTA CLARA 2700 RECIRC UNIT CONTROL 464-127-4A R03015
DNS BOX,MAIN UNIT I/O DISTRIBUTI 2-VC-40010
AMAT SETTING TOOL EVR EXTRACTION 0270-04365
THK LM GUIDE ACTUATOR KR TYPE 46
AMAT RING,FOCUSING,ALUM,200MM,PRSP 3 0020-31163
SANYO DENKI AC SERVOMOTOR 75W SK2000 P50B04007DCL61
AMAT ASSY,MIRROR HOUSING IEP,300MM DPSII 0010-28956
APPLIED MATERIALS(AMAT)WXZ SHADOW RING P/N 0200-00852
AMAT FILTER,CARBON,A3×00,4 PER SYSTEM 2700-0017-000
VARIAN PCB,ASSY PC RAID CONTROLLER E20000284
EATON ELECTRODE SUPPRESSION BOARD 1504260
BROOKS HARMONIC HI-T DC SERVO ACTUATOR RH-14B w ENCODER
AMAT COVER RING,300MM SST 0021-17770
NATIONAL ELECTRONICS MAGNETRON NL10250-25
AMAT SINGLE RING CERAMIC 200MM NOTCH 0200-03388 REV 2
TEL CONTROLLER,VAC PUMP AC-1 CS011-000003-1
TOSOH KIT,ENDU PRECLE CHAM II BELL JAR SET-805-312KR-Q
LAM KIT,LINERS 2300 KIYO 715-801021-838 715-027638-814
NOAH ASSY,THERMOELECTRIC LOW TEMP 120-03775-001
DNS PLATE,HOT ADHESION(AH)80B ASSY 2-XZ-13045
VARIAN DETECTOR,DECT ASSY BURN THRU E11064190
VARIAN POWER SUPPLY,DC/DC RD34955
TOKYO ELECT PCB,TURBO CONTROL(979&947)9699861
SPACE COAST SERVICE PCB,CPU MEMORY EC5000/EC5400
MKS INSTR VALVE,1″JALAPENO VERTICAL 100012543 W/ALU
ACECO PRE ASSY,PEDESTAL LIFT(0-1)02-0472-01
TOKYO GUIDE,CS-Y-18-0 MARK 7/8 CT1380-100600-11
VARIAN HOUSING,FILTER D6IN 00049537-00
MILLIPORE CORP CONTROLLER,PHOTO COOL W2501CC01
DNS TOUCHSREEN NIJERK 11″NIJERK TOUCH IP03.0694
BARNANT PERISTALIC PUMP 14 STAPUR W/CONTR 900-1545
SYSTEMS PSB OS4 60/120 FBGA SDR 12SIT 01079-80028 REV A
EBARA HOLDER,RING(2)E10 C-3812-263-0011
AMAT PCB ASEMBLY LAMP FAILURE,DETECTOR,RADIA 0100-00235
DNS-POWER SUPPLY(TKD),DC FC3000 5-39-53109
VARIAN ISOLATOR,DECEL ES LENS E17181190
AMAT WELD,MANIFOLD CHAMBER A&B 0226-49373
A.G.ASSOCIATES PCA,3-PHASE ZERO X DETE 7100-3639-02
A.G.ASSOCIATES PCA,3-PHASE ZERO X DETEC 7100-5633-02
ULVAC TECHNOLOGIES EM1919-663-01 GROUND SHIELD
AMAT T.S.V ASSY,I4 0010-C0011
AMAT RING,DEPOSITION,FLANGED,A101 HEATER,0020-61187
ULTRATECH ASSY,RETICLE FINGER 01-15-02903
VARIAN BELLOWS,BEAMGATE E17094630
DISCO HI-TEC PCB,ANALOG OUTPUT 1024-03-010(-8)REV D
ASTEC POWER SUPPLY,24V,4.8A 73-85-016 95F5820
FUJI ELECTRIC REGENERATIVE BLOWER VFC504A-7W
WILKERSON FILTER,DRYER,REGEN,12 ORIFICE,8.0SCFM
APPLIED MATERIALS(AMAT)150MM INNER RING 0200-09315
TEL INSULATOR,HEAT 2 DS1110-217001-13
AMAT BOOSTER PS ASSY 0090-a2690
USHIO CONTROLLER,TRANSFER 9708050/U00
EBARA RING,EDGE GEP X-0001-482-4301
AMAT SBBI ASSY SEM-I Beam Blank 0090-A3220
TEL INSULATOR LOWER T32-R6-BL-NC 3D10-202405-13
VARIAN PCB,INTERFACE LOGIC E15001820 0230-00-0166-30
AMAT ASSY,PVD SLIT VALVE DOOR&MOUNT,300MM 0010-13071
AMAT SPEC.,VIRGIN PEEK EDGE GRIP PARTS KAWAS 0190-12634
AMAT LINER,TOP,TICL4 TIN 0040-48030
PCB,TEK 5 NANO 9000 9407-1021 06012-10-035111
APPLIED MATERIALS(AMAT)VME2 CARD CAGE P/N 0190-01623
AMAT HTR JKT FEED THROUGH 3WAY VALVE 1410-00010
AMAT HTR2.5,STR4.8,SPEC,1BP3 1410-00754
WAFER SYSTEMS TECHNOLOGIES PCB,A3 CPU PCM.251411-002
VARIAN BASE,ARC CHAMBER E17201770