Keeping auxiliary AC alive
In neutral sections the original supply uses the DC 100 V battery to maintain AC 100 V output; this is auxiliary continuity, not battery traction.
ဒေသတွင်းရထား
817 · Fukuhoku Yutaka · 福北ゆたか線
Count the cars in a single set. Early 817s have two, while the 3000 subseries has three. Coupled sets can make a longer train.
JR九州
နည်းပညာအချက်အလက်
| ကိုယ်ထည်817 · 2003 | Aluminium · A-train |
|---|
M = motor car; T = trailer. Each row applies to the stated version and source date.
Technical sources
- 最近の鉄道車両 A-train · 日立評論 · 2003-08 · Opening figure, 817系電車
Inside the engineering
Original auxiliary supply and later 2000/3000-subseries traction converter are distinguished.
| Auxiliary input | Original two-car equipment: AC 440 V from the transformer tertiary winding. |
|---|---|
| Auxiliary outputs | DC 100 V, 8 kW; two single-phase AC 100 V outputs, 2.5 kVA each. |
| Later converter | 2000/3000 subseries: new three-level topology and two independent groups. 2 |
Technical sources and page references
- 九州旅客鉄道（株）817系電車用補助電源装置
東洋電機製造・東洋電機技報108 · 2001-09 · pp.28–29（国立国会図書館保存） - さまざまなニーズに応える鉄道車両駆動用主回路技術
日立評論 · 2012-06 · §2.2、pp.27–28
ထိုင်ခုံများ
- Vk4 · 2021-09
- ဘေးတိုက်ခုံတန်း
Kagoshima set Vk4 left the workshop in September 2021 with side-facing benches in place of its reversible seats. The set number matters when dating an interior photograph.
စတင်သည့်နှစ် · 2001
ကိုးကားချက်များနှင့် ပြင်ဆင်ချက်များ
စစ်ဆေးခဲ့သည့်ရက် 2026-11-07