# Phase-to-phase voltmeter selector

Canonical URL: https://eloragrid.ai/symbols/iec-phase-to-phase-voltmeter-selector
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: HSW1S90
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Phase-to-phase voltmeter 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 identifies selection among phase-to-phase voltage measurement connections.

## What it represents

This representation identifies selection among phase-to-phase voltage measurement connections. The selector connects the meter to the documented line-to-line measurement pairs at its operating positions. It is a measurement interface, not the power switching device of the three-phase circuit.
Provide the actual contact programme and measurement position labels. Identify any instrument-transformer secondary circuits that feed the selector.

## How to read it

- Document the selector position table and the meter connection.
- A measurement selector must not be mistaken for a three-phase power isolator.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Document the selector position table and the meter connection.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

A measurement selector must not be mistaken for a three-phase power isolator.

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: HSW1S90 (Autodesk token; not a verified IEC database ID)
- Information added: Document the selector position table and the meter 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.