HSW1S91
Phase-to-neutral voltmeter selector
This representation identifies selection among phase-to-neutral voltage measurement connections.
IEC
IEEE / ANSI · HSW1S91
ANSI/IEEE Phase-to-neutral voltmeter selector form
IEEE-library form of phase-to-neutral voltmeter selector: this representation identifies selection among phase-to-neutral voltage measurement connections.
In plain English
What does ANSI/IEEE Phase-to-neutral voltmeter selector form mean?
This reference locates phase-to-neutral voltmeter selector in Autodesk's IEEE-oriented miscellaneous switches family. 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. The public library uses HSW1S91 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
A simple example
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
What the drawings help you do
Show the reference terminal and each selectable measurement path. The position table should make clear which reading the operator receives at each position. 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. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
This particular reference
IEEE-library form of phase-to-neutral voltmeter selector: this representation identifies selection among phase-to-neutral voltage measurement connections. Phase-to-neutral and phase-to-phase measurements have different connection paths.
- Normally open / normally closed
- The contact state in the normal condition defined for the drawing.
- Phase
- One of the related AC waveforms in a power system.
- Terminal
- An identified point where a conductor connects.
Read the source: Autodesk IEEE Symbol Preview — Miscellaneous Switches
IEEE / ANSI · 3 Voltage Phase-to-Neutral Switch
Autodesk IEEE Symbol Preview: Miscellaneous Switches, block HSW1S91. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic · HSW1S91
What it represents
This reference locates phase-to-neutral voltmeter selector in Autodesk's IEEE-oriented miscellaneous switches family. 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. The public library uses HSW1S91 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.
Read the operating mechanism and the contact reference state together. Cross-reference every associated contact to the same device and show which movement, signal or reset changes its condition; the symbol alone does not establish the complete switching sequence.
Show the reference terminal and each selectable measurement path. The position table should make clear which reading the operator receives at each position. 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. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted.
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.
A distinction that matters
Phase-to-neutral and phase-to-phase measurements have different connection paths.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Miscellaneous Switches
Public IEEE-oriented Miscellaneous Switches table explicitly lists HSW1S91 as 3 Voltage Phase-to-Neutral Switch. This supports the vendor convention context, not reproduction of the publisher graphic.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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