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Faiveley 33.60.6647
Faiveley 33.60.6647
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2 抗干扰的技术对策分析
为防止干扰,可采用硬件和软件的抗干扰措施,其中,硬件抗干扰是基本和重要的抗干扰措施,一般从抗和防两方面入手来抑制和干扰源,切断干扰对系统的耦合通道,降低系统对干扰信号的敏感性。
2.1 电源系统引入的干扰
电网的干扰,频率的波动,将直接影响到PLC系统的可靠性与稳定性。如何抑制电源系统的干扰是提高PLC的抗干扰性能的主要环节。
(1) 加装滤波、隔离、屏蔽、开关稳压电源系统。
设置滤波器的作用是为了抑制干扰信号从电源线传导到系统中,使用隔离变压器,注意:屏蔽层要良好接地;次级连接线要使用双绕线(减少电线间的干扰),隔离变压器的初级绕组和次级绕组应分别加屏蔽层,初级的屏蔽层接交流电网的零线;次级的屏蔽层和初级间屏蔽层接直流端。
为了抑制电网大容量设备起停(如送水泵等)引起电网电压的波动,保持供电电压的稳压,可采用开头稳压电源。
GE Multilin, New Other / G6P3CH / Front Panel, G60
GE Multilin, G60G03HCHF8LH6CM8NP6CU6CW6C / Front Panel, T35, G60
GE Multilin G60 Generator Management Relay G60C00HCHF8AH6PM8CP6PU6PWXX
GE G60N00ALHF8MH6LM8MP6LU6LW6L MULTILIN G60 GENERATOR
GE Multilin, Used / G60, G60G03HCHF8LH6CM8NP6CU6CW6C
GE C60N00HKHF8LH6EM8LP6NU6FWXX
GE Multilin SR750 750-P5-G5-S5-HI-A20-R-T 750
GE Multilin, 12HGA11A70F / Auxiliary Relay, 115V, 60cycles, GEH-1793
GE Multilin F60 Feeder
GE Multilin SR750 750-P5-G5-S5-HI-A20-R 750
GE 745-W3-P5-G5-HI-R-E MULTILIN 745 TRANSFORMER MANAGEMENT RELAY D583116
GE Multilin SR750 750-P5-G5-S5-HI-A20-R-E 750
GE Multilin, Used / SR750, 750-P5-G5-S5-HI-A20-R-T / 750
GE MULTILIN SR 745-W2-P1-G1-HI-P-H SR745
GE Multilin MIB High Impedance Differential Module MIB30HICE00000
GE F60 Multilin Feeder Management Relay F60H04VFHF8LH6LMXXPXX
GE Multilin C60 Breaker Management Relay C60E00HKHF8LH6EM6CPXXUXXWXX
GE MULTILIN 750 Feeder Management Relay 750-P5-G5-S5-HI-A20-R-E with SR750-CASE
GE Multilin F35 Multiple Feeder Management Relay w Display Panel & Rack NO PLCS
GE Multilin SR469 Motor Management Relay SR469-RELAY 469-P5-HI-A20
GE Multilin L90
GE, New Other / M60, M60G03HKHF8LH6NM8NP6MU5AWXX
GE MULTILIN 745 TRANSFORMER PROTECTION MANAGEMENT RELAY 745-W2-P1-G1-HI-A-L-R-E
GE Multilin F35 Multiple
GE MULTILIN SR 745-W2-P1-G1-HI-P-H SR745
GE Multilin F35 Multiple Feeder
GE Multilin SR745 745-W2-P5-G5-HI-A
GE Multilin 750-P5-G5-S1-HI-A20-R 750 Feeder Managment Relay SR750
GE Multilin SR750 Feeder Management Relay Tested Guar 6 mo 750-P5-G5-D5-HI-A20-R
GE Multilin, Used / T6P3KH / Front Panel, T60
GE Multilin, New Other / T6P3CH
GE Multilin T60 Transformer Management Relay UR Series w/ UR900 64MHz
GE MULTILIN MM200-XXH2S 240 VAC 5 A 50/60 HZ 3 PH
GE Multilin, Used / M6P3KH / Front Panel, M60
GE Multilin 350 SR3 family 350-E-P5-G5-H-E-S-N-N-1E-D-N
GE SR750
GE Multilin, New Other / F6P3KH / Front Panel, F60