engineering

Kita-Iwaki powerline

Kita-Iwaki powerline is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Kita-Iwaki powerline rather than just read about it. In short: The Kita-Iwaki Powerline is the largest double-circuit powerline for three-phase electric power in the world. Built in 1999, it runs from the Minami-Iwaki switch (Tamura, Fukushima) to the Higashi-Yamanashi substation (Ōtsuki, Yamanashi) and has 2 circuits, which are presently operated at 500 kV, but can be switched over to 1100 kV if necessary equipment is installed.

Key takeaways

Kita-Iwaki powerline belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Kita-Iwaki powerline to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Kita-Iwaki powerline from memory before moving on to harder problems.

Reference excerpt

The Kita-Iwaki Powerline is the largest double-circuit powerline for three-phase electric power in the world. Built in 1999, it runs from the Minami-Iwaki switch (Tamura, Fukushima) to the Higashi-Yamanashi substation (Ōtsuki, Yamanashi) and has 2 circuits, which are presently operated at 500 kV, but can be switched over to 1100 kV if necessary equipment is installed. The conductors of the lines consist of 8*31.5 mm ACSR ropes providing for a total current capacity of 4000 amperes. The line is supported by lattice towers with a typical height of 108 meters. These have three crossbars of spanning 31, 32 and 33 meters. There are two such lines: the first one is 190 kilometers long and starts at the Kashiwazaki-Kariwa Nuclear Power Plant and runs over the Nishi-Gunma switch to the Higashi-Yamanashi substation. It was built in 1993. The second 240 kilometers long line, which was built in 1999 starts at the Nishi-Gunma substation and runs over the Higashi-Gunma substation to the Minami-Iwaki switch, whereby it passes close to the Shin-Imaichi switch, which is not connected to the line.

Sites

Sources http://old.life-needs-power.de/2008/24-04-2008_Donnerstag/24042008_16-30_LNP_Luxa_1100%20kV-V2%203.pdf#page=9 Archived 2023-11-25 at the Wayback Machine

Worked examples

Example 1 — a first encounter with Kita-Iwaki powerline

Start with the simplest possible case. Write down what Kita-Iwaki powerline claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Kita-Iwaki powerline before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Kita-Iwaki powerline ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Kita-Iwaki powerline

In research: Kita-Iwaki powerline appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Kita-Iwaki powerline in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Kita-Iwaki powerline is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1999 establishments in Japan, Electric power infrastructure in Japan, Electric power stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Kita-Iwaki powerline outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Kita-Iwaki powerline” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Kita-Iwaki powerline in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Kita-Iwaki powerline means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Kita-Iwaki powerline out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Kita-Iwaki powerline in simple terms?

Why does Kita-Iwaki powerline matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Kita-Iwaki powerline?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Kita-Iwaki powerline.