# Two-network voltage measurement selector

Canonical URL: https://eloragrid.ai/symbols/iec-two-network-voltage-measurement-selector
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: HSW1S93
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Two-network voltage measurement selector
Autodesk IEC-60617 Symbol Preview — Measurement-selection and mechanically operated switch forms; vendor family reference, not certified IEC geometry or database identifier.

This representation distinguishes voltage selection between two three-phase networks.

## What it represents

This representation distinguishes voltage selection between two three-phase networks. The measurement is selected from more than one network or bus system. Both source identities must remain visible so that a reading is not attributed to the wrong supply.
Tag the two measurement sources and provide a position table with each voltage pair. This selector does not create a load-supply transfer arrangement between the networks.

## How to read it

- Identify both sources and each selectable measurement connection.
- Measurement selection between networks is not an automatic source-transfer power switch.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Identify both sources and each selectable measurement connection.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

Measurement selection between networks is not an automatic source-transfer power switch.

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: HSW1S93 (Autodesk token; not a verified IEC database ID)
- Information added: Identify both sources and each selectable measurement connection.
- Preview: Independent educational concept; consult the publisher and applicable standard for the exact graphic

## Public references

- [AutoCAD Electrical: Level, flow, keyed and measurement switches](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-1FB94435-C954-4479-BD97-25796DB8F728.htm) — Autodesk. Official public publisher family name and reference context; vendor identifiers and graphics are distinct from licensed IEC database content.

## 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.