Side-by-side reference

Understand the difference.

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

First referenceCompare with

HMO1M15

IEC

Permanent-magnet stepping motor

This representation identifies a permanent-magnet stepping-motor function.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / Manufacturer
Form evidence: Permanent-magnet stepping motor. Autodesk IEC-60617 Symbol Preview — DC, linear and stepping motor forms; vendor family reference, not certified IEC geometry or database identifier.

A distinction that matters

A stepping motor requires a drive sequence rather than an ordinary continuously applied DC supply assumption.

Full reference

Symbols

Three-phase motor

A motor representation identifies an electrical machine operating as a load in the stated system arrangement. Connection count, motor type and additional winding or rotor detail can change the representation. Its nameplate and equipment schedule provide the selected machine data.

Drawing use: SLD / Schematic
Application: Power distribution
Reference family: IEC / IEEE / ANSI

A distinction that matters

A contactor switches the motor circuit. Motor protection and short-circuit interruption may be provided by additional specified equipment.

Full reference

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