M
Three-phase motor
An electrical motor load connected to its switching and protective equipment.
SLD / Schematic
Protection functions · 66
Notching or jogging device
Controls limited machine movements or, in modern motor relays, supervises the allowed starting duty.
SLD / Schematic · 66
What it represents
Controls limited machine movements or, in modern motor relays, supervises the allowed starting duty.
In a drafting package, connect this reference to the jog command or start counter and time window. The associated drawing should trace the next-start permission and motor control sequence; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the jog command or start counter and time window.
- Trace the next-start permission and motor control sequence.
Information to show or reference
- Label the jog command or start counter and time window.
- Cross-reference the next-start permission and motor control sequence.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
The exact 66 application must be stated: jogging control and starts-per-time supervision are not identical behaviours.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
SecoGear medium-voltage switchgear application and technical guide, DET-882
Public manufacturer number/name association. Drafting explanations are independently written.
IEEE C37.2-2022: power-system device function numbers
Normative device-number publication; exact edition wording and compliance require the licensed standard.
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.