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剩余电流动作保护器
剩余电流动作保护器是一个电流保护装置，它将在出现一个接地电流时脱扣。它们一直计算单相或3相系统线电流的矢量和，如果矢量和为零，则正常供电；如果矢量和超过预设值（根据装置的灵敏性），它将立即中断供电。
剩余电流动作保护器根据3个参数分类如下 :
可探测的波形
脱扣选择性和脱扣时间
此外，根据结构类型，剩余电流动作保护器(RCD) 可分为电磁式剩余电流动作断路器(RCBO)、不带过流保护的剩余电流动作保护器(RCCB)和剩余电流动作保护器(RCD blocks)。
S203M-B20 2CDS5 SH202-D20&OT630E11K 1SCA1 SH202-D20&EMAX X1B12 R400 PR331/P-LI FHR 3P NST 1TNX01 SH202-D20
T2N160 TMD100/1000 PMP 3P 1SDA SH202-D20&CDP13-FBP.100 1SAJ1 SH202-D20&T1N160 TMD80/800 FFC 4P 1SDA SH202-D20
UT5N400 PR222DS/P-LSI R400 WMP 4P 2TFJ1 SH202-D20&M12-3B 2TLA0 SH202-D20&S201M-K32 NA 2CDS7 SH202-D20
E217-16-01G220 2CCA1 SH202-D20&ACC.for Lock in racked-out POSTTTION -X1 1SDA SH202-D20&RB110 7TCA6 SH202-D20
E1N PR121/P-LSI FHR 3P YO22aa 1TNE07 SH202-D20&E4N 3200 T LSI 3P FHR M220aa 1SDA SH202-D20&SFD 16 1SNA0 SH202-D20
F9035 7TAI3 SH202-D20&S802S-UCB50 2CCS5 SH202-D20&XT2N160 TMD10-100 WMP 4P 1SDA SH202-D20
JSM A12-2000 2TLA0 SH202-D20&KIT DIN50022 XT3+RC Sel/RC Inst.DIN 1SDA SH202-D20&UT4H250 LSI R250 PMP 4P 2TFJ1 SH202-D20
DRE 1/5.ADO 1SNA0 SH202-D20&DS201 C13 APR30 2CSR4 SH202-D20&NSL53E-88*220VDC 1SBH3 SH202-D20
SFB.B3 1SNA0 SH202-D20&Orion1-4-14-180-E Transmitter+ Receiver 2TLA0 SH202-D20&SR-2-81 2 SH202-D20
TOP UNIT SDC500 CN 24kV 110APGL NST TU24-SDC500TJ SH202-D20&OTM400E3CM230C 1SCA0 SH202-D20&AL28/M25/CS90/GR 7TCA6 SH202-D20
E1B/MS 800 FHR 3P New 1TNE2 SH202-D20&S202-D25 2CDS1 SH202-D20&GSH202 AC S-D40/0.1 2TAZ1 SH202-D20
CP4-20W-11 1SFA5 SH202-D20&SOR 60V -T7/T7M 1SDA SH202-D20&OVR T2 40-275 P TS 2CTB0 SH202-D20
1SLTCA9 SH202-D20&BJMI10(4) 1SNA0 SH202-D20&EXS08MSC1K 7TCA3 SH202-D20
GSH203 AC-B63/0.03 2TAZ5 SH202-D20&MCB-20B 1SFA2 SH202-D20&E1N 1000 H LSIG 4P WMP NST 1SDA SH202-D20
54-0-3781 SH202-D20&OSV800DK 1SCA1 SH202-D20&E6H PR122/P-LSIG WMP 4P NST 1TNE01 SH202-D20
XT2V160 LSIG R25 PMP 4P 1SDA SH202-D20&Console to HG75 promo 2TLJ0 SH202-D20&XT1C160 TMD160/1600 FFC 4P N=100% 2TFH1 SH202-D20
T5H400 PR222DS/P-LSIG R320 WMP 3P 1SDA SH202-D20&T6L800 DC TMA800 FF 4P 2TFB1 SH202-D20&CTL40-12 7TAH5 SH202-D20
TY200-40-3 7TCG8 SH202-D20&FDU for T4-T5 w/PR222DS/P or PR222DS 1SDA SH202-D20&KLC-S same keys N20006 O.P. -X1 1SDA SH202-D20
T5V400 TMA320/ PMP 4P N=100% 1SDA SH202-D20&XT4H160 TMA125-1250 WMP 4P InN=100% 1SDA SH202-D20&E1N PR121/P-LSIG WMP 3P NST 1TNE01 SH202-D20
ADP adapters 12pin T4-6 P/W 1SDA SH202-D20&120M8-A 7TAA9 SH202-D20&S75/M75/A 7TCA0 SH202-D20
500HPS 7TAH9 SH202-D20&RAB 7TCI0 SH202-D20&UVR 48V -X1 1SDA SH202-D20
M102-P 30.0-63.0A w/ MD2 24VDC 1TNA6 SH202-D20&GRPE-100-9-C 7TAG1 SH202-D20&2D-8 7TAI1 SH202-D20
AH412 2TCZ0 SH202-D20&SPM-75D150 MA－75D150（H700XW500XD150） SH202-D20&MA2.5/5 D2 (JV) 1SNA0 SH202-D20
E3S PR122/P-LSIG FHR 4P NST 1TNE01 SH202-D20&F202 A S-63/0.3 2CSF0 SH202-D20&EMAX X1N10 R800 PR332/P-LSIG WMP 4P NST 1TNX01 SH202-D20
XT4H250 LSIG R250 FF 3P 1SDAS254S-C63 GHS4A1A125 TMF50/500 FF 4P 1SDAPD9-1202 1SFA2EMAX X1B12 R800 PR332/P-LSIG WMP 4P NST 1TNX01
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选择要添加的生词本
刚才；方才；刚刚
You use just to say that something happened a very short time ago, or is starting to happen at the present time. For example, if you say that someone has just arrived, you mean that they arrived a very short time ago.
I've just bought a new house...
我刚买了栋新房子。
The two had only just met...
这两个人只不过才刚刚认识。
正在；正要；正准备
If you say that you are just doing something, you mean that you are doing it now and will finish it very soon. If you say that you are just about to do something, or just going to do it, you mean that you will do it very soon.
I'm just making the sauce for the cauliflower...
我正在弄花椰菜的调味汁呢。
just going to walk down the lane now and post some letters...
我正打算沿这条小巷往南走，去寄几封信。
（用于强调）正，就，恰恰（在某个时刻）
You can use just to emphasize that something is happening at exactly the moment of speaking or at exactly the moment that you are talking about.
Randall would just now be getting the Sunday paper...
兰德尔这个时候应该正在拿周日的报纸。
Just then the phone rang...
正在那时，电话响了。
（尤用于纠正错误的观点）只是，仅仅是
You use just to indicate that something is no more important, interesting, or difficult, for example, than you say it is, especially when you want to correct a wrong idea that someone may get or has already got.
It's just a suggestion...
这只是个建议。
It's not just a financial matter...
这不仅仅是资金的问题。
（用于强调所谈的只是一小部分而非全部）仅仅是，只不过是
You use just to emphasize that you are talking about a small part, not the whole of an amount.
That's just one example of the kind of experiments you can do...
这只不过是你可以做的各种试验中的一例罢了。
These are just a few of the many options available.
这些只不过是众多可能的选择中的几个。
（用于强调数量少或时间短）只是，仅仅
You use just to emphasize how small an amount is or how short a length of time is.
Stephanie and David redecorated a room in just three days...
斯蒂法妮和戴维仅仅花了3天就把一个房间装饰一新。
Remember he's just fourteen years old.
记住，他才14岁。
（用于动词前表示事情的结果糟糕，很可能导致局面恶化）只（会），只不过
You can use just in front of a verb to indicate that the result of something is unfortunate or undesirable and is likely to make the situation worse rather than better.
Leaving like I did just made it worse...
像我那样一走了之只会让事情变得更糟。
They just hurt the people in their community, they didn't really solve any problem.
他们只是伤害了他们社区的居民，并没有真正解决任何问题。
（用于表示情况在很小的程度上属实）刚刚，勉强，差一点就不
You use just to indicate that what you are saying is the case, but only by a very small degree or amount.
Her hand was just visible by the light from the sitting room...
借着起居室的灯光，勉强能看见她的手。
It was Colin's voice, only just audible...
那是科林的声音，勉强能听得见。
（与might，may和could连用，表示稍有可能）可能，也许
You use just with 'might,' 'may,' and 'could', when you mean that there is a small chance of something happening, even though it is not very likely.
It's an old trick but it just might work...
这是个老掉牙的把戏了，不过也许会有用。
It may just be possible.
那也许有可能。
（用于加强语气，表示生气、赞美、肯定等）硬是，就是，简直
You use just to emphasize the following word or phrase, in order to express feelings such as annoyance, admiration, or certainty.
She just won't relax...
她就是放松不下来。
I knew you'd be here. I just knew...
我知道你会在这儿的。我就是知道。
（用于指示、礼貌的请求或表示意图的陈述，用来弱化语气）请，只要，只管…就好了
You use just with instructions, polite requests, or statements of intention, to make your request or statement seem less difficult.
Could you just give us a description of your cat?...
能否请您向我们描述一下您的猫？
Can you just lift the table for a second?...
你把桌子抬起来一下好吗？
请稍候；稍等一下
You use just in expressions such as just a minute and just a moment to ask someone to wait for a short time.
'Let me in, Di.' — 'Okay. Just a minute.'
“让我进来，迪。”——“好的。稍等一下。”
（用于打断某人，以表示不同意、解释某事或让其保持冷静）稍等一下，且慢
You can use just in expressions such as just a minute and just a moment to interrupt someone, for example in order to disagree with them, explain something, or calm them down.
Well, now just a second, I don't altogether agree with the premise.
嗯，且慢，我并不完全同意这个前提。
（用于否定附加问句，表示完全赞同）难道不是吗，确实如此
You can use just with negative question tags, for example 'isn't he just?' and 'don't they just!', to say that you agree completely with what has been said.
'That's crazy,' I said. 'Isn't it just?' he said...
“那简直是疯了，”我说。“谁说不是呢？”他说。
'The manager's going to have some tough decisions to make.' — 'Won't he just.'
“经理将要作一些非常艰难的决定。”——“确实如此。”
（表示完全可以想象）完全，简直
If you say that you can just see or hear something, you mean that it is easy for you to imagine seeing or hearing it.
I can just see the nasty suspicious looks I'd be getting from you if we started whispering together...
要是我们开始凑在一起交头接耳，我简直能想象到你那种令人讨厌的怀疑的目光了。
I can just hear her telling her friends, 'Well, I blame his mother!'
我简直能听到她和她的朋友们说，“哎呀，都是他妈妈的错！”
确切地；精确地
You use just to mean exactly, when you are specifying something precisely or asking for precise information.
It is really not clear just why he became a Socialist...
他为何成为社会党人的确切原因实际上还不清楚。
There are no statistics about just how many people won't vote...
没有统计数字表明具体将有多少人不参加投票。
恰恰是；正是
You use just to emphasize that a particular thing is exactly what is needed or fits a particular description exactly.
Kiwi fruit are just the thing for a healthy snack...
猕猴桃作为有益健康的零食是再好不过了。
'Let's get a coffee somewhere.'—'I know just the place.'
“我们找个地方喝杯咖啡吧。”——“我知道个好地方。”
正（如）；正（像）
You use just in expressions such as just like ,just as...as, and just the same when you are emphasizing the similarity between two things or two people.
Behind the facade they are just like the rest of us...
在那副外表背后，他们和我们大家是完全一样的。
He worked just as hard as anyone...
他和所有人一样非常努力。
差不多；几乎；近乎
You use just about to indicate that what you are talking about is so close to being the case that it can be regarded as being the case.
There are those who believe that Nick Price is just about the best golfer in the world...
有一些人认为尼克·普赖斯几乎就是世界上最优秀的高尔夫球运动员了。
What does she read? Just about everything...
她看些什么书？几乎什么都看。
勉强；差一点就不
You use just about to indicate that what you are talking about is in fact the case, but only by a very small degree or amount.
I can just about tolerate it at the moment...
当时我差一点就忍受不了了。
We've got just about enough time to get there.
我们刚刚有足够的时间赶到那里。
（用于表示接近于某一具体数量）几乎，差不多
Just on is used in mentioning an almost exact number or amount.
Eve, squinting at the clock, saw it was just on 7 a.m...
伊夫眯着眼瞥了一下钟，看到差不多是早上7点钟。
Many were retired people, and just on a fifth were in their fifties.
许多都是退休的人，其中差不多有五分之一年龄在五十多岁。
CONVENTION
对极了；正是
Just so is used to agree with or confirm a statement that has been made.
'She has a large flat in Mayfair.' — 'Just so.'
“她在梅费尔有个大公寓。”——“正是。”
严格按照要求的
If things are just so, they are done or arranged exactly as they should be or exactly as someone wants them.
I do her hair, and it has to be just so.
我必须得按她的要求为她做头发。
（用于弱化抱怨、给出建议或理由时的语气）只不过，只是
You use the expression it's just that when you are making a complaint, suggestion, or excuse, so that the person you are talking to will not get annoyed with you.
I'm sorry I struck you. I didn't mean to. It's just that I was so mad...
很抱歉我打了你。我不是有意的，只不过我当时气极了。
Yo it's just that you need a haircut.
你的头发挺好的；只是你需要剪剪了。
ADJECTIVE USE
形容词用法
ADJ-GRADED
公正的；正当的；正义的；合理的
If you describe a situation, action, or idea as just, you mean that it is right or acceptable according to particular moral principles, such as respect for all human beings.
In a just society there must be a system whereby people can seek redress through the courts...
在一个公正的社会中，一定会有一套人们可以通过法庭寻求赔偿的体制。
She fought honestly for a just cause and for freedom...
她为了正义的事业和自由而光明正大地斗争。
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