Instrument transformer (CT / VT / CVT)

Single-phase outdoor instrument transformer on a tubular support. CT: head type, with the oil-filled head on a tall insulator, P1/P2 primary pads and an oil-level bellows. VT: inductive, with a ribbed base tank and a single top terminal. CVT: stacked capacitor units on an electromagnetic-unit tank. Each has a secondary terminal box with a conduit to grade, an earth bond, and a grading ring at 245 kV and above.

Installation

Copies onshore/instrument-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 { InstrumentTransformer } from './components/deck-twin/onshore/instrument-transformer'

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

Props

P&ID

Single-line: a current transformer is a small circle threaded on the primary conductor (or a loop) with its secondary leads; a voltage transformer is a pair of small overlapping circles connected from the line to earth. A CVT adds a capacitor stack (two parallel plates) above the VT.

tag CTtag VTtag CVTIEC 60617 (single-line diagram); IEC 61869

Circle on the line = CT; two circles from line to earth = VT. Small overlapping circles in a feeder (not to earth) are a power transformer. CT also collides with cooling-tower tags on process drawings: context decides.

Instrument transformer datasheet (IEC 61869-2 / -3 / -5) fields and the props they set

Typekind

Rated voltagekv

External insulationinsulation

Tag numbertag

For agents

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

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

Add the Deck Twin "Instrument transformer (CT / VT / CVT)" component to this project. Run `npx -y https://decktwin.com/cli/deck-twin-0.2.2.tgz add instrument-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 instrument-transformer` for its props, ranges and ports. Render <InstrumentTransformer /> 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