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

IEC

IEC motor-starter form: motor starter coil

A motor starter uses an operating coil and power contacts to control the motor feeder. The coil belongs to the control circuit; the main contacts carry motor current. Auxiliary contacts report or interlock operation but do not replace the main poles. This entry identifies the motor starter coil form in the publisher's IEC-context family.

Drawing use: Schematic
Application: Control circuits
Reference family: IEC / Manufacturer
Form evidence: Motor Starter Coil. Autodesk IEC-60617 Symbol Preview: Motor Starters, HMS1 / VMS1. This identifies the publisher's library context; exact IEC graphics and database identities are not asserted.

A distinction that matters

This entry adds the motor starter coil detail to the broader motor-starter form family. The contact illustration is a functional view of one pole, not a complete motor starter or a proof of fault protection. Coil voltage, duty, overload coordination and the number of linked poles come from the chosen equipment and design.

Full reference

Symbols

Contactor

A contactor uses an operating mechanism to switch its main contacts and may include auxiliary contacts for control or indication. On a power drawing it represents the main switching path; on a schematic its coil and contacts may be distributed and connected by identifiers.

Drawing use: SLD / Schematic
Application: Control circuits
Reference family: IEC / IEEE / ANSI

A distinction that matters

A contactor and circuit breaker have different duties. Adding an overload relay does not make every contactor assembly equivalent to a circuit breaker.

Full reference

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