# GIS-to-air bushing interface

Canonical URL: https://eloragrid.ai/symbols/gis-to-air-bushing-interface
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: GBI
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchyards
Input: GIS conductor
Output: Air-side terminal

Identifies the primary transition between a gas-insulated conductor and its air-insulated connection.

## In plain English

### What this block does

Identifies the primary transition between a gas-insulated conductor and its air-insulated connection.

### A simple example

In a switchyard equipment diagram, the primary reference identifies the electrical role of an installed component while the linked equipment schedule and manufacturer drawing supply its exact construction and dimensions. For this reference, the drawing identifies “GIS conductor” at the input and “Air-side terminal” at the output. The bushing construction follows the selected assembly.

### What the drawings help you do

Start at the named input: GIS conductor. Identify its source device or document and the state represented on the drawing. Follow the named output: Air-side terminal. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: GIS conductor
- Output: Air-side terminal
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: GIS conductor → GBI → Air-side terminal
A reading guide. The entry's original illustration and input/output facts describe this application.

- [Gas-insulated switchgear](https://www.hitachienergy.com/products-and-solutions/high-voltage-switchgear-and-breakers/gas-insulated-switchgear)


## What it represents

Identifies the primary transition between a gas-insulated conductor and its air-insulated connection. High-voltage primary equipment carries, interrupts, measures or conditions the main power circuit. Its function, insulation arrangement and equipment boundaries need to be distinguished from the secondary signals used to control it.
In a switchyard equipment diagram, the primary reference identifies the electrical role of an installed component while the linked equipment schedule and manufacturer drawing supply its exact construction and dimensions. For this reference, the drawing identifies “GIS conductor” at the input and “Air-side terminal” at the output. The bushing construction follows the selected assembly.
Read the connected power path before interpreting a secondary output or alarm. These original educational component references provide no product dimensions, dielectric rating, installation clearance or construction approval. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.

## How to read it

- Start at the named input: GIS conductor. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Air-side terminal. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- The bushing construction follows the selected assembly.
- Read the connected power path before interpreting a secondary output or alarm. These original educational component references provide no product dimensions, dielectric rating, installation clearance or construction approval.

## Information to show or reference

- Label the source and connection reference for gis conductor.
- Identify the destination and defined state of air-side terminal.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: The bushing construction follows the selected assembly.

## Important distinction

The bushing construction follows the selected assembly. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.

## Facts

- Representation: Functional block
- Installation focus: Switchyards
- Input / boundary: GIS conductor
- Output / connection: Air-side terminal
- Lookup label: GBI is a library lookup label, not a standard device designation.

## Public references

- [Gas-insulated switchgear](https://www.hitachienergy.com/products-and-solutions/high-voltage-switchgear-and-breakers/gas-insulated-switchgear) — Hitachi Energy. Public technical context for high-voltage primary equipment references. Primary switching equipment and instrument-transformer interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.