# Cable sheath voltage-limiter interface

Canonical URL: https://eloragrid.ai/symbols/cable-sheath-voltage-limiter-interface
Publisher: Elora Grid
Updated: 2026-11-03
Lookup label: CSVI
Drawing use: Schematic
Reference families: Manufacturer

Representation: Functional block
Installation focus: switchyards
Input: Cable sheath and earth
Output: Sheath surge-limiting path

Identifies the selected sheath overvoltage-limiter connection within its bonding arrangement.

## In plain English

### What this block does

Identifies the selected sheath overvoltage-limiter connection within its bonding arrangement.

### A simple example

In a switchyard arrangement, the earthing references help connect each primary equipment structure and surge-protection device to the correct earth-grid interface. Separate details show actual joints, sizes and installation routes. For this reference, the drawing identifies “Cable sheath and earth” at the input and “Sheath surge-limiting path” at the output. Limiter selection depends on the sheath bonding design.

### What the drawings help you do

Start at the named input: Cable sheath and earth. Identify its source device or document and the state represented on the drawing. Follow the named output: Sheath surge-limiting path. Cross-reference its destination and separate the command from confirmation that the equipment responded.

### Terms

- Input: Cable sheath and earth
- Output: Sheath surge-limiting path
- Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.

Concept diagram: Cable sheath and earth → CSVI → Sheath surge-limiting path
A reading guide. The entry's original illustration and input/output facts describe this application.

- [Earthing connections](https://www.electrical-installation.org/enwiki/Earthing_connections)


## What it represents

Identifies the selected sheath overvoltage-limiter connection within its bonding arrangement. Earthing and lightning interfaces identify the connections between equipment metalwork, primary protection devices and the station earthing network. Their electrical purpose differs from their physical conductor route or electrode geometry.
In a switchyard arrangement, the earthing references help connect each primary equipment structure and surge-protection device to the correct earth-grid interface. Separate details show actual joints, sizes and installation routes. For this reference, the drawing identifies “Cable sheath and earth” at the input and “Sheath surge-limiting path” at the output. Limiter selection depends on the sheath bonding design.
Name every connected item and the earthing design reference. The illustrative connection does not establish touch or step voltages, conductor sizing, lightning coverage or safe working conditions. 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: Cable sheath and earth. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Sheath surge-limiting path. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Limiter selection depends on the sheath bonding design.
- Name every connected item and the earthing design reference. The illustrative connection does not establish touch or step voltages, conductor sizing, lightning coverage or safe working conditions.

## Information to show or reference

- Label the source and connection reference for cable sheath and earth.
- Identify the destination and defined state of sheath surge-limiting path.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Limiter selection depends on the sheath bonding design.

## Important distinction

Limiter selection depends on the sheath bonding design. 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: Cable sheath and earth
- Output / connection: Sheath surge-limiting path
- Lookup label: CSVI is a library lookup label, not a standard device designation.

## Public references

- [Earthing connections](https://www.electrical-installation.org/enwiki/Earthing_connections) — Schneider Electric, Electrical Installation Guide. Public technical context for switchyard earthing and lightning interfaces. Protective earthing, bonding and earth-electrode 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.