# Phase-to-neutral voltmeter selector

Canonical URL: https://eloragrid.ai/symbols/iec-phase-to-neutral-voltmeter-selector
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: HSW1S91
Drawing use: Schematic
Reference families: IEC, Manufacturer

## Symbol convention

Convention: IEC
Form: Phase-to-neutral 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-neutral voltage measurement connections.

## What it represents

This representation identifies selection among phase-to-neutral voltage measurement connections. The meter is connected to the selected phase relative to the documented neutral or reference point. That connection differs from measuring between two phase conductors.
Show the reference terminal and each selectable measurement path. The position table should make clear which reading the operator receives at each position.

## How to read it

- Show the neutral/reference connection and each selected phase in the position table.
- Phase-to-neutral and phase-to-phase measurements have different connection paths.

## Information to show or reference

- Identify the associated device, circuit or diagram boundary.
- Show the neutral/reference connection and each selected phase in the position table.
- Cross-reference the equipment data, terminal mapping or operating-state legend needed to interpret the form.

## Important distinction

Phase-to-neutral and phase-to-phase measurements have different connection paths.

## Facts

- Reference scope: Specific public IEC-context family form
- Publisher reference token: HSW1S91 (Autodesk token; not a verified IEC database ID)
- Information added: Show the neutral/reference connection and each selected phase in the position table.
- 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.