Understand the difference.

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

HMO1M8

IEC

Shunt-excited DC motor

This representation distinguishes the publisher's derived or shunt-excitation DC motor form.

Drawing use

SLD / Schematic

Application

Power distribution

Reference family

IEC / Manufacturer

Form evidence

Shunt-excited DC 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

Shunt, series and separately supplied field arrangements are different connection topologies.

Full referenceAdd to legend

M

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 referenceAdd to legend

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