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ABB断路器 E2N2000 PR121/P-LSI IN=2000A 3P F HR
ABB断路器 E2N2000 PR121/P-LSI IN=2000A 3P F HR
ABB断路器 E2N2000 PR121/P-LSI IN=2000A 3P F HR
断路器一般由触头系统、灭弧系统、操作机构、脱扣器、外壳等构成。
当短路时,大电流(一般10至12倍)产生的磁场克服反力弹簧,脱扣器拉动操作机构动作,开关瞬时跳闸。当过载时,电流变大,发热量加剧,双金属片变形到程度推动机构动作(电流越大,动作时间越短)。
有电子型的,使用互感器采集各相电流大小,与设定值比较,当电流异常时微处理器发出信号,使电子脱扣器带动操作机构动作。
断路器的作用是切断和接通负荷电路,以及切断故障电路,防止事故扩大,保证运行。而高压断路器要开断1500V,电流为1500-2000A的电弧,这些电弧可拉长至2m仍然继续燃烧不熄灭。故灭弧是高压断路器解决的问题。
吹弧熄弧的原理主要是冷却电弧减弱热游离,另一方面通过吹弧拉长电弧加强带电粒子的复合和扩散,同时把弧隙中的带电粒子吹散,迅速恢复介质的绝缘强度。
低压断路器也称为自动空气开关,可用来接通和分断负载电路,也可用来控制不频繁起动的电动机。它功能相当于闸刀开关、过电流继电器、失压继电器、热继电器及漏电保护器等电器部分或全部的功能总和,是低压配电网中一种重要的保护电器。
低压断路器具有多种保护功能(过载、短路、欠电压保护等)、动作值可调、分断能力高、操作方便、等优点,所以被广泛应用。结构和工作原理低压断路器由操作机构、触点、保护装置(各种脱扣器)、灭弧系统等组成。
低压断路器的主触点是靠手动操作或电动合闸的。主触点闭合后,自由脱扣机构将主触点锁在合闸位置上。过电流脱扣器的线圈和热脱扣器的热元件与主电路串联,欠电压脱扣器的线圈和电源并联。当电路发生短路或严重过载时,过电流脱扣器的衔铁吸合,使自由脱扣机构动作,主触点断开主电路。当电路过载时,热脱扣器的热元件发热使双金属片上弯曲,推动自由脱扣机构动作。当电路欠电压时,欠电压脱扣器的衔铁释放。也使自由脱扣机构动作。分励脱扣器则作为远距离控制用,在正常工作时,其线圈是断电的,在需要距离控制时,按下起动按钮,使线圈通电。
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MC07B0022-5A3-4-00 1
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激光测距仪DR500-A311 1
SW1-31 1
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JESD-MV2E12200 1
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iR-DM16-P 1
iR-DQ16-P 1
CMT2158X 1
R.XLG.0400.0010.9999H 6
NES-6400-PMMU-10装置 Common_Hardware_NES-6400-PMMU 4
skiip2403GB172-4DW 8
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8402-257
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7005109 Rev A 1
MT8150XE 1
真空计-Gauge;CDG045D;3CC1-351-2300;AKT:102241666 1
HF-SP152 1
XU-CN1170A 1
型号为SDU 500
SDU 500-5
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邦纳 LMX06-NS05 1
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41D732687 12
G841D732687 12
G78843549G4 24
SEC5-1/4GA-APN8D-SC
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SR3-61-1C-A00 1
Esmd371L4txa (lenze) 1pcs
Esmd751L4txa (lenze) 2pcs
Esmd152L4txa (lenze) 1pc
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3BHB040252R0001-Connection Kit 1pce
3BHB040254R0001-Service Kit 1pce
6GK1417-5AB00 1
6ES7138-4FA05-0AB0 1
3VL4740-1DC36-2HB1 1
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ATV930D55N4Z 1
REM615 1
CC-PAIH01
CC-PAOH01
CC-PDIL01
CC-PDOB01
CC-TAIX11
CC-TAOX11
CC-TDIL01
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1SDA038324R1 1
A02B-0303-C234 1
2945003104 3
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CRS36 3
25B-D017N104 面价12269 1
G26004-A3118-A070 1
9AC9100-0AA10 1
320-1TE41-2AA3 1
PM851K01 3BSE018168R1 1
DCS502-0700-41-1102010 1
A5F00133580-012 C98043-A7100 1
C98043-A7100-L3-1
210-1PE21-8UL0 1
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A06B-6087-H126
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1C31234G01 1
1C31238H01 1
1C31122G01 1
1C31125G02 1
卡底座10BASE(两槽位) 1B30035H01 1
CP-C.1 24/5.0 1SVR360563R1001 2个
3BHE046836R0101 1
EM010-9371 1
DCS502B0140-41-21P2000
DCS502B0050-41-21P1000
3BSE018283R1
3BSE003827R1
3BSE014666R1
3BSE004772R1
3BSE012545R1
3BSE005176R1 SDCS-IOB-21
3BSE004086R1 SDCS-IOB-3
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3BSE020419R1
3BSE010796R1
3BSE011180R1
DSDP170K02
3BSE003127R1
3BSE018290R1
3BSE016029R1 SA168K16
3BSE019933R1
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3701/55 289761-01 1个
3701/55 323 174-01 3个
323174-01
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84C603708G2 1
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6AV2123-2GB03-0AX0
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6ES7231-4HD32-0XB0
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VE6046P3 (KJ1611X1-FD3 + KJ1611X1-FD3) 1台
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R900029482
3BHB003041R0101
3BHB000272R0101
3BHE010751R0101
3BHE004468R0021
3BHE009017R0101
3BHE006805R0001
3BHB003431R0101
3BHB000652R0101
HIEE320693R0001
HIER466665R0099
HIEE400103R0001
HIEE451116R0001
HIEE401481R0001
HIEE300927R0101
HIEE450964R0001
HIEE200130R0002
HIEE400106R0001
HIEE401091R0002
HIEE300725R0001
HIEE305082R0001
HIEE300910R0001
HIEE300690R0001
53MC5412A23BAX?XX
FISHER ROSEMOUNT 8712CR12 USPP 8712CR12
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FORNEY 32955201 USPP 32955201
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FOXBORO 12A-75-200C NSFP 12A75200C
FOXBORO 130K-N5-ECRB USPP 130KN5ECRB
FOXBORO 130PD-N NSFP 130PDN
FOXBORO 14A-EB-K NSPP 14AEBK
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FOXBORO 202S-10-SSSSSN?SNSS USPP 202S10SSSSSNSN?SS
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FOXBORO 2AI-T2V-FGB USPP 2AIT2VFGB
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FOXBORO 2AX-T2 NSFP 2AXT2
FOXBORO 760CNA-AT-1 USPP 760CNAAT1
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GE FANUC 44A297069-G02 USPP 44A297069G02
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