Genset GA
Generator package
A generic generating-package envelope linked to official equipment and installation drawings.
GA objects
Protection functions · 54
Turning-gear engaging device
Controls engagement of the turning gear used to rotate a large machine at low speed.
SLD / Schematic · 54
What it represents
Controls engagement of the turning gear used to rotate a large machine at low speed.
In a drafting package, connect this reference to the turning-gear mechanism and speed/interlock signals. The associated drawing should trace the engagement actuator and proof-of-position circuit; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
This designation is useful when reading machine and legacy control drawings. Retain the documented function on an existing drawing and consult the original equipment manual before assigning it to a new design.
How to read it
- Identify the turning-gear mechanism and speed/interlock signals.
- Trace the engagement actuator and proof-of-position circuit.
Information to show or reference
- Label the turning-gear mechanism and speed/interlock signals.
- Cross-reference the engagement actuator and proof-of-position circuit.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
Turning-gear engagement is a specialist machine mechanism, not a bus or generator paralleling breaker.
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.
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