跟讀練習: Comparing Low Voltage Vs. Medium Voltage Equipment on Solar Sites - 通過影片學習英語口語
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28 句
如果句子過短或過長，請點選 Edit 進行調整。
1
Let's work our way backwards from the interconnection point and compare some equipment.
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First off, we have our system disconnect, which is almost without exception required by utilities for any distributed generation project, with the possible exception of some small residential projects.
3
For low voltage projects, we typically have a blade disconnect.
4
For utility scale systems, especially overhead connected projects, we'll see what's called a GOAB or gang operated airbrake switch.
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Next up, we have fuses, which can be a really helpful item to have for blanket protection from the utility, which often has a high available fault current.
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For low voltage projects, we typically have a fuse disconnect.
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For utility scale systems, especially overhead connected projects, we might see a set of three fuse cutouts.
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The next protective device might be a main circuit breaker, which can provide a bit more sensitive protection features than a fuse
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and could also be connected to a shunt trip circuit to be opened by a remote input.
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For medium voltage systems, a recloser sort of takes the place of a main circuit breaker, but with a whole lot more bells and whistles.
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A pole-mounted recloser is separated into two sections, a switching unit at the top of the pole and a control relay, usually mounted at ground level.
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The relay senses what's happening in the switching unit
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and tells the switching unit to open or close according to the settings in the relay.
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Most low-voltage circuit breakers are not set up to trip on voltage or frequency, but this is a standard function of a recloser.
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In almost every PV system nowadays, you're going to have some kind of revenue metering.
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In the low-voltage world, this could be a CT cabinet like the one shown here.
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For overhead medium-voltage systems, you're likely to see a primary metering rack, though a good percentage of projects still meter each subarray at the low-voltage side,
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either in addition to or instead of at medium voltage.
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Transformers are not always used in commercial systems, but they're also not totally uncommon either,
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especially when you encounter a 208 volt service, but you want to use a 480 volt string inverters for rooftop stringing efficiencies.
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If they're used, they typically are dry type transformers, less than 300 kVA.
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One of the key differentiators of utility scale projects, in addition to being connected at medium voltage is that they use a step-up transformer,
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so you'll have one or more of these on every project. And lastly are inverters.
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While you might see a 120kW Ving inverter like this one here on a commercial project, utility-scale projects sometimes use single inverters that are 2MW or more
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and are often combined into skids of 4-6MW and paired with a transformer.
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Fortunately, however, solar modules are still solar modules.
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Kind of.
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Thank you.
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本課的詞彙與口語要點
這段影片共有 28 個句子、475 個單詞可供跟讀。 講話部分時長為 2:42。 說話人語速自然，每分鐘約 176 個詞，接近日常對話。 只有 71% 的單詞屬於英語最常用的 3,000 詞，詞彙難度較高。
影片中的重點詞彙
影片中 15 個值得學習的單詞，附發音和釋義：
| 單詞 | 發音 | 釋義 |
|---|---|---|
| voltage 名詞 | /ˈvəʊltɪd͡ʒ/ | 電壓 /電壓 |
| utility 名詞 | /juːˈtɪlɪti/ | 效用, 用處 /用處 |
| connect 動詞 | /kəˈnɛkt/ | 連線 /連線 |
| fuse 名詞 | /fjuːz/ | 導火線 /導火線, 導火索 /導火索 |
| overhead 名詞 | /ˈəʊvəˌhɛd/ | 間接費用 /間接費用 |
| mount 動詞 | /maʊnt/ | 騎 /騎 |
| string 名詞 | /stɹɪŋ/ | 線 /線 |
| exception 名詞 | /əkˈsɛpʃən/ | 排除 |
| pole 名詞 | /pəʊl/ | 極 /極 |
| meter 名詞 | /ˈmitəɹ/ | 計量表 /計量表 |
| module 名詞 | /ˈmɑd͡ʒul/ | 模組 /模組 |
| percentage 名詞 | /pə(ɹ)ˈsɛntɪd͡ʒ/ | 百分率, 百分比 |
| sensitive 形容詞 | /ˈsɛn.sɪt.ɪv/ | 敏感 |
| compare 動詞 | /kəmˈpɛɚ/ | 比, 比較 /比較 |
| helpful 形容詞 | /ˈhɛlp.fl̩/ | 有幫助 /有幫助 |
影片中的語法
說話人最常用的結構，並附上影片中的原話：
| 結構 | 影片中的用法 |
|---|---|
| 被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的 | be connected · is separated · are not set |
| 定語從句 who / which + 從句 — 補充說明人或事物 | disconnect, which is · fuses, which can · breaker, which can |
需要注意的發音
說話人用了 6 次縮略和弱讀形式，例如 they're, you're, we'll。請按聽到的簡短形式來說。
- “sh” 和 “zh” 音: exception /əkˈsɛpʃən/, efficiency /ɪˈfɪʃ.ən.si/, residential /ˌrɛzɪˈdɛnʃəl/, differentiator /dɪf.əˈɹɛn.ʃi.eɪ.tə/, interconnection /ˌɪn.tɚ.kəˈnɛk.ʃən/
- 長單詞——注意重音位置: utility /juːˈtɪlɪti/, efficiency /ɪˈfɪʃ.ən.si/, residential /ˌrɛzɪˈdɛnʃəl/, fortunately /ˈfɔɹ.t͡ʃə.nɪt.li/, differentiator /dɪf.əˈɹɛn.ʃi.eɪ.tə/
如何用這段影片練習
- 先完整聽一遍影片，不要開口，記下不認識的單詞。
- 先用 0.75 倍速逐句跟讀，熟練之後再回到正常速度。
- 錄下自己的聲音並與原聲對比，特別注意 voltage, utility, connect 這類單詞。
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。