描述
危害
如果是,高铁300km的时速,两个金属相摩擦,肯定会产生火花,这不是很危险吗?
你能看到的电火花,其实很可能发展成弓网电弧了。
按照空气放电的激烈程度排序,电晕-火花-电弧。
因此,在列车的弓与网接触中断(即弓网离线)条件下,应该是电火花->电弧这样的发展顺序。此外,车速越大,越容易发生弓网离线,弓网离线次数(弓网离线率)与离线程度(弓网大/中/小离线)加剧,弓网电弧现象会愈发明显。
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。
Westinghouse JDB2200 Circuit Breaker 200 Amp New
Adatek RP24 System 10 Digital I/O Control Unit New
Acrison 115-1299 MD-II 2000 CTS Multi-Feeder Controller
ABB Sace Isomax S6D 630 Circuit Breaker AC-23A New
RELIANCE ELECTRIC 0-54307 TRANSMITTER CARD 054307 New
Allen Bradley 1203-CN1 Communication Module 1203CN1
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Trane Tracer 100i EMT1000AAC10110 BMS System Controller
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Danfoss VLT 5000 VFD AC Varible Speed Drive 175Z0258
Intel D41JCTLS Voice Processing Board Four-Port New
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Hach 1000 Wireless Cell Modem 5228860 T-Mobile New
Reliance 57405-E Drive Analog I/O Module 57405E
MSA 482588 5000 Control Board New
RELIANCE ELECTRIC 0-51829-2 PC Board 0518292 New
Foxboro D0130FL Control Board New
Reliance Electric 0-49015-A Cardpak Reference 049015A
Parker PK3/115V Digiplan Stepping Motor Drive PK311V
RELIANCE ELECTRIC 0-51862-1 USAB CARD 0518621 New
Siemens Sentron FXD63B225 Circuit Breaker 225A 3 Poles
Ropex RES-402/230VAC Controller PD-3 740202 RES402 New
Honeywell 51309355-501 Control Board 51309355501 New
Johnson Controls NU-NCM300-0 NCM-300 Controller Used
Allen Bradley 1771-ES Servo Expander Module 1771ES Used
Reliance 0-49001-5 Cardpak Power Supply 0490015 New
Giddings & Lewis 502-03840-23-R0 Servo Enc 502-03840-23
BOSCH 1070075698-104 PROFIBUS-WS-MODULE DIN 19 245 T1+2
Foxboro D0130FH-C Control Board
Toyota Corolla 8910IA0912220005 S60 Navigation Entertai
RELIANCE ELECTRIC 0-48675 DV/DT NETWORK FIELD CARD
RELIANCE ELECTRIC 0-51831-6 CVTG CURRENT VOLTAGE CARD
Reliance Electric 8647511R Stack Rectifier 86475-11R
Honeywell W7100G1001 Chiller Discharge Water Control
Danfoss VLT 3000 VFD AC Varible Speed Drive 175H1730
Omron D5F-2B30 Photoelectric Sensor D5F2B30 New
Rosemount 3D39122G03 Power Supply New
Emerson 1550-4206 Control/Interface Board 15504206
Fanuc A14B-0076-B324 Power Supply A14B0076B324 New
AMAG 2-DC 8000-0049-A 2 Reader Door Controller 2DC New
Emerson 1581-4000 Logic Control Board 15814000
Fischer & Porter 50SF2000C Magnetic Flowmeter Converter
Valmet/Neles A415579 VAL0077632 S482650230 BB10140500
Grundfos UPA50-160 Model A Pump UPA 50-160 UPA50160 New
Jandy R0466803 Power Center CPU PCB Replacement Kit New
Jandy R0466805 Power Center CPU PCB Replacement Kit New
Jandy R0466810 Power Center CPU PCB Replacement Kit New
Jandy R0466812 Power Center CPU PCB Replacement Kit New
Allen Bradley 1747-L542 CPU Module SLC 500 1747L542
RELIANCE ELECTRIC 0-52002-2 RELAY CARD 0520022 NEW
Quatro Automation Group Servo Motor 210-2019-001 QA03B
Giddings & Lewis 502-03417-03 Servo Control 5020341703
GE Fanuc 44A719348-104-R04 AX503 Axis 44A719348104
Yokogawa ADMAG AM11-ASA1A–000 Magnetic Flow Converter
Baldor ID15H201-E AC VFD Speed Drive 230V ID15H201E
GE Fanuc IC500-CB524M Arith Control IC500CB524M New