1746-RL40

1746-RL40

电压互感器二次侧所选择的仪表，其消耗的总功率不得超过电压互感器的额定容量。否则，会增大误差。

  1．额定电压比
    应根据被测电压的高低选择电压互感器的额定电压比，也就是所选用的电压互感器的一次侧额定电压应与被测电压相适应，且应高于后者。与电压互感器配套使用测量仪表一般应为100 V的交流电压表。通常使用的板式电压表是按电压互感器一次侧额定电压刻度的，这类仪表上大多注明了所需配用的电压互感器的规格，故可以依据此来选择相应的电压互感器。

    2．准确度等级
    所选择的电压互感器的准确度等级应满足实际要求或规定。

    3．额定容量
    电压互感器二次侧所选择的仪表，其消耗的总功率不得超过电压互感器的额定容量。否则，会增大误差。

416-3XR05-0AB0               
371-1CA07-0AX0               
416-3XR05-0AB0               
414-4HM14-0AB0               
414-5HM06-0AB0               
416-3FS06-0AB0               
414-2XK05-0AB0               
412-1XJ05-0AB0               
414-4HR14-0AB0               
412-5HK06-0AB0               
400-0HR01-4AB0               
414-3EM06-0AB0               
412-3HJ14-0AB0               
414-3EM06-0AB0               
417-4HT14-0AB0               
413-2XG02-0AB0               
960-1AA04-0xA0               
413-1XG01-0AB0               
952-1AL00-0AA0               
3RW4056-6BB44               
952-1AM00-0AA0               
451-3AL00-0AE0               
952-1KP00-0AA0               
414-3XM05-0AB0               
417-4HL04-0AB0               
038-6GL84-1HJ1               
210-5BE32-2UV0               
400-2JA10-0AA0               
416-3XL00-0AB0               
197-1LA12-0xA0               
412-2XG04-0AB0               
315-2AG10-0AB0               
215-1AG40-0xB0               
314-6EH04-0AB0               
315-2AG10-0AB0               
321-1BL00-0AA0                
357-4AH01-0AE0               
313-6CF03-0AB0               
314-6CF02-0AB0               
216-2BD23-0xB0               
6ES5928-3UB21               
315-2EH13-0AB0               
414-2xg04-0AB0               
314-1AG14-0AB0               
216-2AD23-0xB0               
313-6CG04-0AB0               
313-5BF03-0AB0               
414-3XJ04-0AB0               
138-4HA00-0AB0               
123-1aa00-0da1               
123-1AA00-0LA3               
123-1AA01-0FA1               
123-1ab00-0ca3               
6SN1123-1AB00-0BA1               
6SN1123-1AA00-0KA2               
6SN1123-1AB00-0HA2               
6sN1123-1AA00-0BA0               
6SN1123-1AA00-0BA1               
3HAC025917-001/00               
3HAC025784-001/00               
3HAC14279-1/01               
DSQC539 3HAC 14265-1 SR92B130               
3HAC. 025097-001/16               
3HAC026253-001               
3HAC025097-001               
3HAC030923-001               
3HAC 026253-001               
3HAC028357-001               
3HAC12928-001               
3HAC025917-001               
3HAC025784-001/00               
3HAC3619-1               
YB560103-BD               
3HNC025918-001               
3HAB7229-1               
1785-L40C               
6ES7134-4FB01-0AB0               
6ES7134-4GB01-0AB0               
6ES7134-4GB11-0AB0               
6ES7134-4GB52-0AB0               
6ES7134-4GD00-0AB0               
6ES7134-4JB51-0AB0               
6ES7134-4LB02-0AB0               
6ES7134-4MB02-0AB0               
6ES7134-4NB01-0AB0               
6ES7134-4NB51-0AB0               
6ES7135-4FB01-0AB0               
6ES7135-4GB01-0AB0               
6ES7135-4LB02-0AB0               
6ES7138-4CA01-0AA0               
6ES7138-4CA50-0AB0               
6ES7138-4CB11-0AB0               
6ES7138-4DA04-0AB0               
6ES7138-4DD01-0AB0               
6ES7138-4DF01-0AB0               
6ES7138-4DF11-0AB0               
6ES7138-4FA04-0AB0               
6ES7138-4FB03-0AB0               
6ES7138-4HA00-0AB0               
6ES7151-1AA05-0AB0               
6ES7151-1BA02-0AB0               
6ES7151-3AA23-0AB0               
6ES7151-3BA23-0AB0               
6ES7151-7FA21-0AB0               
6ES7151-8AB01-0AB0               
6ES7151-8FB01-0AB0               
6ES7153-1AA03-0xB0                 
6ES7153-2AR03-0xA0               
6ES7153-2BA02-0xB0               
6ES7153-2BA02-0xB0               
6ES7153-4AA01-0xB0               
6ES7193-4CA30-0AA0               
6ES7193-4CA40-0AA0               
6ES7193-4CA50-0AA0               
6ES7193-4CB10-0AA0               
6ES7193-4CB30-0AA0               
6ES7193-4CB70-0AA0               
6ES7193-4CD20-0AA0               
6ES7193-4CD30-0AA0               
6ES7193-4CE10-0AA0               
6ES7193-4CF50-0AA0               
6ES7193-4CG30-0AA0               
6ES7193-4CL30-0AA0               
6ES7193-4JA00-0AA0               
6ES7195-7HA00-0xA0

1、按照用途不同，电流互感器大致可分为两类：
2、测量用电流互感器（或电流互感器的测量绕组）：在正常工作电流范围内，向测量、计量等装置提供电网的电流信息。
3、保护用电流互感器（或电流互感器的保护绕组）：在电网故障状态下，向继电保护等装置提供电网故障电流信息。

互感器二次接地

1、互感器二次接地是指电流互感器二次的S2端子接地，或电压互感器的n端子接地。
2、只要单点接地，由于互感器二次与一次之间是隔离的，接地前，二次绕组与大地没有电位关系，接地后，互感器不会与大地形成回路，正常运行时，电流不会流向大地。
3、当一次绕组与二次绕组之间的绝缘损坏时，一次高压串入二次回路，而一次高压与大地有固定的电位关系，会有电流流向大地，并将互感器二次的电压钳位在地电压，保证二次仪表及人身安全。

               
6ES7195-7HB00-0xA0               
6ES7195-7HC00-0xA0               
6ES7195-7HD10-0xA0               
6ES7195-7HG00-0xA0               
6ES7195-7KF00-0xA0               
6ES7197-1LA11-0xA0               
6ES7197-1lB00-0xA0               
6GK5202-2BH00-2BA3               
ohne               
6EP1332-1SH31               
6GK5204-2BB10-2AA3               
6GK5204-2BC10-2AA3               
3RK1207-1BQ40-0AA3               
3RK1207-3BQ40-0AA3               
6GK5208-0BA10-2AA3               
6ES7211-0AA23-0xB0               
6ES7211-0BA23-0xB0               
6ES7211-1AD30-0xB0               
6ES7211-1AD30-0xB0               
6ES7211-1AD30-0xB0               
6ES7211-1BD30-0xB0               
6ES7211-1BD30-0xB0               
6ES7211-1BD30-0xB0               
6ES7211-1HD30-0xB0               
6ES7211-1HD30-0xB0               
ABB  3HAB6621-1               
ABB  DSCS 150  DSCS150 57520001-FY SE9608E089               
ABB  1SDA057415R1               
ABB  1SDA055908R1               
ABB  DSQC326               
ABB  DCP-02 P 37211-4-0369654               
ABB  1878397               
9981522               
ABB  3HAC021031-002                 
ABB  3HAB2220-1     DSQC317               
     3HNE00554-1    DSQC 355               
     3HAB8101-16/11A  DSQC358G               
     3HAC026289-001   DSQC626A               
     3HAC031851-001/05               
     3HAB8101-8               
     3HAB8101-8/12b   DSQC346G               
     ACH401603032               
     ACH550-UH-01-4               
     ACH550-UH-124A-4               
     ACH550-UH-031A-4               
     ACH550-UH-06A9-4               
     ACH401600532               
     ACH401600632               
     ACS504-100-5               
     57350001-CN    DSAV-111               
     57310001-KD    DSBC 172               
     3BSE004086R0001  SDCS-IOB-3               
     3HAA3573-ACA/R2A     DSQC302               
     3HAA3573-AJA/1     DSQC 307               
     3HAA3573-ACA/3               
     1tgb302004r0001               
     3BSC610022R0001               
     3adt311200r0001               
     3BHB000272R0001               
ABB  3BHB001336R0001               
ABB  086329-004   ECS086329-004               
ABB  086363-002   US02140132               
ABB  ACX550-U0-180A-4               
     BIAC-1000 570-03400               
     C1900-0720               
ABB  15CLPT VIZ-75               
ABB  SACE E3S-A16   PR122/P-LSIG                
     3HAC4790-1               
     yb 560 103 bd/4  DSQC 223               
     3HAB2220-1       DSQC 317               
     3HAB2242-1       DSQC 326                
     3HAB7229-1       DSQC 328                   
     3HAC2206-1               
     MC17HR0025               
ABB  OETL-NF1600SW                 
ABB  LKE-16  LKE 16                
ABB  SACE EMAX E2N 16                
ABB  1MRS090416-AAA               
ABB  1SBP260101R1001 XOO8R1-B4.0               
ABB  YB560103-CE/28   DSQC 236T               
     3ADT211034R0001               
     1MRS090212-AAA               
ABB  1SBP260175R1001                 
ABB  ACH550-VDR-031A-4               
ABB  FS450R12KE3               
ABB  2000kVA               
ABB  180-524/1 DSMB133                
ABB  182-72/2  DSCS116                
ABB  402-29/3  DSCA12                
ABB  3ADT209018R0001                   
ABB  3BSC690099R2                 
ABB  3BSC980004R615   DSBC 176                
ABB  3BSE018161R1     PM864AK01                  
ABB  3BSE004737R1               
ABB  3BSE008508R1               
ABB  3BSE003641R1     PM150                  
ABB  3BHT300005R1     AI620                 
ABB  3BSE052605R1     AO815               
     YB161102-BS/1    DSQC 115               
     YB560103-BF/2    DSQC 215               
ABB  YB560103-BN      DSQC 230                 
     YB560103-CC      DSQC 236C               
ABB  3BSE000863R0001               
ABB  3BSE022462R1               
ABB  3BDH000022R1               
ABB  3BSE018157R1               
ABB  3BUR001454R1               
ABB  3BSE020508R1                
     3bse002224r1               
     3BHT3000025R1    DI650                 
     3BSE002224R1                
     3BSE018100R1    PM860K01               
     3BSE018110R1               
     3BHE004059R0001  SDCS-CON-2A               
     3BSE003911R0001               
     3BSE018128R1    PM856                
     3BSE018104R1    PM856K01                
                     SDCS-FEX-2               
     3BSE005028R1   SDCS-COM-1               
     SDCS-CON-2B               
     3ADT306100R0001   SDCS-PIN-11               
     SDCS-CON-1               
     DCS502B0025-51-21P2000-000000000               
     DCS501B0050-41-21P1000-000000000               
     DCS501B0100-41-2100000               
     DCS502-0025-51-2100000               
     DCS602-1500-61-15000A0               
     DCS602-0450-61-15000A0               
     53MC5411A25BAXXDXXXX               
     ACH401606032               
     ACS501-040-4-00P2               
                   
     3HAB8101-18     DSQC546A               
     3HAB8101-18/09C               
     3HAB8101-18/09B               
     SDCS-POW-1                 
     3adt309600r1                
     SDCS-POW-1C                  
     5716075-AH    DSDX 451L               
     3BSE050198R1               
     3BHT300007R1    DO630                
     3BHT300011R1    AI630                
     3BSE0237760R1   TB840A               
     3BSE023675R1    AI845               
ABB  3BSE010535R1    PM645B                 
ABB  3BSE011181R1     PM511V16 cpu                
ABB  3BSE018104R1     PM856K01               
ABB  3BSE018168R1     PM851K01               
ABB  3BSE042235R1      PP845               
ABB  3BSE042236R1      PP865                
ABB  3BSX459959R4               
ABB  3BSX459961R4                
ABB  3BSX796254R4                
     3BUP001191R1                 
ABB  3BUP001191R1   CI545V01 

在方案中，这一小功率的开关电源吸收回路系统设计如上图图3所示。可以看到，图3所给出的这一吸收回路是利用电阻、电容和阻塞二极管组成的钳位电路，能够有效地保护开关功率管不受损坏。当开关功率管导通时变压器的磁通量增大，这时便将电能积蓄起来。当开关功率管截止时，便将积蓄的电能释放，变压器初级绕组中便有剩磁的产生，并通过D5反馈到次级。剩磁释放完毕后，初级绕组NP的电压VP为120V～340V功率管能够承受的大峰值电压为650V。吸收时间小为21xs，则吸收回路的电阻可计算为：

功率30W的小型开关电源分享之滤波电路设计

　　在计算过程中需要注意的是，时间常数RC通常要比周期T大得多，因此在计算时一般会取5倍左右。因为电路工作在高频状态，故必须使用超快速恢复二极管，此处二极管选用Motorola公司的MUR460，其耐压600V以上，电流值在4A以上。

　　以上就是本文针对一种输出功率为30W的小功率开关电源设计方案，所进行的分享，希望能够通过两天来的电路设计简析，对各位初学者和电子爱好者的设计学习带来一定的帮助。