Power transformer (oil-immersed)

Oil-immersed ONAN / ONAF power transformer on a bunded steel plinth with skids. Pressed-steel radiator banks with isolating valves and side-blow fans, conservator with magnetic level gauge, OLTC sight glass, Buchholz relay and silica-gel breathers, OLTC compartment with motor drive and protective relay, bushing CT boxes on outdoor turrets, cover access ladder from 10 MVA, pressure relief device, marshalling kiosk with OTI / WTI and a rating plate. Tank size follows the MVA rating; terminations are air-filled cable boxes or porcelain bushings on the cover.

Installation

Copies electrical/transformer.tsx and the shared lib/ into src/components/deck-twin/. Needs three, @react-three/fiber and @react-three/drei. See installation for the manual route.

Usage

import { Canvas } from '@react-three/fiber'
import { OrbitControls } from '@react-three/drei'
import { Stage } from './components/deck-twin/lib/stage'
import { Transformer } from './components/deck-twin/electrical/transformer'

export default function Scene() {
  return (
    <Canvas shadows camera={{ position: [8, 5, 9], fov: 35 }}>
      <Stage>
        <Transformer />
      </Stage>
      <OrbitControls makeDefault />
    </Canvas>
  )
}

Props

P&ID

Two overlapping circles (one per winding) on the single-line diagram, with the HV feeder above and the LV feeder below. Winding symbols (Δ, Y, Yn) and the MVA / kV rating are written beside it; a diagonal arrow through both circles marks an on-load tap changer.

tag TRtag TXIEC 60617 (single-line diagram)

Two circles = two-winding transformer; three circles = three-winding. ANSI drawings show two facing coils instead. Two circles in a P&ID instrument context are not used, so this symbol is almost always electrical.

Transformer datasheet / rating plate (IEC 60076-1) fields and the props they set

Rated powermva

HV rated voltagehvKv

LV rated voltagelvKv

Cooling (ONAN / ONAF)cooling

Terminationsterminations

On-load tap changeroltc

Tag numbertag

Typical suppliers

Hitachi Energy · Siemens Energy. The geometry is generic and sized from public standards. It is not vendor CAD.

For agents

Machine-readable entry with props, ranges, defaults and ports:

Or fetch /r/transformer.json, or copy a ready-made instruction:

Add the Deck Twin "Power transformer (oil-immersed)" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add transformer` (it copies the file and the shared lib into src/components/deck-twin/), then `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz info transformer` for its props, ranges and ports. Render <Transformer /> inside a React Three Fiber <Canvas shadows>, wrapped in <Stage> from src/components/deck-twin/lib/stage. Set props from my data (metres, NPS in inches, ASME class) and leave the rest at defaults. Install three, @react-three/fiber, @react-three/drei and @types/three if they're missing. Full guide: https://decktwin.com/skill/SKILL.md