NO
Normally open contact
A contact shown open in the normal state defined for its device.
Schematic
Symbols · NC EARLY
Early-break normally-closed contact
An early-break NC contact opens earlier in a documented mechanical sequence than associated contacts.
Schematic · NC EARLY
What it represents
An early-break NC contact opens earlier in a documented mechanical sequence than associated contacts. It may participate in interlocks whose operation depends on this order.
How to read it
- Determine which other contact transitions are used as the reference sequence.
- The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation.
Information to show or reference
- Link common operator
- Label early opening
- Reference contact sequence
A distinction that matters
Early break is a mechanical sequence annotation, not an instantaneous protection threshold.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Relays and contacts: public symbol reference
Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source 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.
Explore related references
Put the reference into a drawing workflow.
Elora Grid helps electrical teams work with drawings, specifications and equipment information. Explore the drafting workflow or join the early-access waitlist.