Understand the difference.

Compare the meaning, drawing context and source references of two entries. A similar graphic or shared abbreviation does not establish equivalence.

DS 3POS

IEEE / ANSI

ANSI/IEEE Three-position disconnector form

This reference locates three-position disconnector in Autodesk's IEEE-oriented disconnect 1 pole family. A three-position disconnector selects between two paths and an intermediate position. Switchgear schematics must define each position and any linked earth or isolation function explicitly. The public library uses HDS11Q89 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEEE / ANSI / Manufacturer

Form evidence

Two Way Disconnect with 3 Positions. Autodesk IEEE Symbol Preview: Disconnect 1 Pole, block HDS11Q89. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier.

A distinction that matters

Three positions describe available states; they do not imply that every transition can occur under load.

Full referenceAdd to legend

DS 3POS

Symbols

Three-position disconnector

A three-position disconnector selects between two paths and an intermediate position. Switchgear schematics must define each position and any linked earth or isolation function explicitly.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEC / Manufacturer

A distinction that matters

Three positions describe available states; they do not imply that every transition can occur under load.

Full referenceAdd to legend

Original educational previews. Follow the source references on each full entry for the appropriate standard or selected product.