1747-L542

2 ．下降重物时电路工作情况
（ 1 ）制动下降
（ 2 ）强力下降
3 ．控制电路的保护措施
（ 1 ）由强力下降过渡到制动下降，为避免出现高速下降的保护
（ 2 ）保证反接制动电阻串入的条件下才进入制动下降的联锁
（ 3 ）控制电路中采用 KM1 、 KM2 、 KM3 常开触点并联，是为了在“下 2 ” 、“下 3 ” 位转换过程中，避免高速下降瞬间机械制动引起强烈震动而损坏设备和发生人身事故。
（ 4 ）加速接触器 KM6 ～ KM8 的常开触点串接于下一级加速接触器 KM7 ～ KM9 电路中，实现短接转子电阻的顺序联锁作用。
（ 5 ）由电压继电器 KA2 与主令控制 SA 实现零压与零位保护，过电流继电器 KA1 实现过电流保护；行程开关 SQ1 、 SQ2 实现吊钩上升与下降的限位保护。ABB 3BSE038415R1 AO810V2 8 channel 0..2mA


ABB 101-004A2, SDS101-004A2-67?0V00, 3ADT211033R 


ABB ASEA CIRCUIT BOARD CARD DSPC157 57310001-GP 2668 184-238/2


ABB ASEA CIRCUIT BOARD CARD DSPC157  ME7A 57310001-GP/1 2668 184-238/1


ABB ASEA CIRCUIT BOARD CARD DSPC157  ME7B 57310001-GP/2 2668 184-238/1


ABB PC  BOARD NPOW42-62c NPOW42


ABB APGIC03 General Interface Board E-32235 


ABB CIRCUIT BOARD CARD ASEA DSPC157  OD 57310001-GP/2 57310001GP/2


ABB CIRCUIT BOARD CARD ASEA DSPC157  OD 57310001-GP/2 2668 184-238/1


ABB CONTACTOR AF260-20 


ABB Main Circuit Interface Board 61431390B 1/410564947


ABB 10Base2 Fieldbus cheaernet 37262-4-0369565 


ABB ASEA YPK 107A YT204001-CB/2 


ABB ASEA Circuit Board Card 2668171-15/3 YM321001-Z 


ABB ASEA Board Card 2668 170-318 YM321001-AN 


ABB FISHER & PORTER CIRCUIT BOARD CARD 686B264U09 


ABB FISHER & PORTER CIRCUIT BOARD CARD 686B264U05


ABB DFE02 Feldbus Module AUI 37262-4-0369566 DFE 02, 0369566 0022 00


ABB Process Controller 53MC5212B45BBXX?ACAXX 53MC52 53MC5212


ABB ASEA CIRCUIT BOARD CARD DSPC 150 DSPC150 57310256-AF/3 57310256AF/3


ABB Board Card 5731 0256-DB DSBC-170 2668 182/128


ABB MOUNTING BASE HARMONY RELAY P-HB-IOR-8000N2?00 


ABB Fieldbus M Profibus DPV1 DFM 01 37262-4-0369570 


ABB Freelance 2000 Fieldbus M. Serial Module Dual 37262-4-0369571 


ABB DRIVE ACS401600632 


ABB ASEA CIRCUIT BOARD CARD DSPC 157 8C DSPC157 57310001-GP/2 57310001GP/2


ABB ASEA CIRCUIT BOARD CARD YYT 102C YT212001-AK/5 2668 180-89/3


ABB ASEA CIRCUIT BOARD CARD YYT 102C YT212001-AK/7 2668-180-89/3


ABB LIMELITE 2000 AMPLIFER DMK-12A 


ABB ASEA CIRCUIT DSQC 129 YB161102-BV/1 2668 182-82/1


ABB ASEA CIRCUIT DSQC 129 0C OC YB161102-BV/1 2668 182-82/3


ABB CONDUCTIVITY ANALYZER TB84EC1000321 TB84EC 240 V 240V


ABB BAILEY CONTROLS INPUT MODULE DIGITAL 8ch 120V ac/dc DI820 


ABB BAILEY CONTROLS INPUT MODULE DIGITAL 8ch 230V ac/dc DI821 


ABB FISHER & PORTER CIRCUIT  686B217U01 


ABB ASEA YPK 107A YT204001-CB/2 


ABB FREELANCE 2000 FIELDCONTROLLER MINBOARD P 37261-4-0369528 


ABB ASEA CIRCUIT BOARD CARD DSQC 129 OB 0B YB161102-BV/1 2668 182-82/3


ABB ASEA CIRCUIT BOARD CARD DSQC 129 6K YB161102-BV/1 2668 182-82/3


ABB ASEA CIRCUIT BOARD CARD DSQC 129 7C YB161102-BV/1 2668 182-82/3


ABB MOUNTING BASE HARMONY RELAY P-HB-RMU-8000N2?00  RMU-800


ABB PRESSDUCTOR SYSTEM  PFRA101 BA871-1 3BSE003 911R0001


ABB FIELD CONTROLLER FREELANCE 2000 POWER SUPPLY P 37264-4-0369561 115/230v


ABB DISCONNECT SWITCH OESA-F100JT6-2 100 AMP 100A A


EEI Power Interface Board 604-165 BEL625 42-402089 


ABB ASEA CIRCUIT BOARD CARD DSPC 153 DSPC153 57310256BA/2 2668 180-113/5


ABB ASEA CIRCUIT BOARD CARD DSPC 153 DSPC153 57310256-BA/1 2668 180-113/5


ABB FISHER & PORTER CIRCUIT  686B384-U05