Transformer GA
Transformer envelope
A generic transformer object for locating the equipment and its documented interfaces.
GA objects
Protection functions · 63
Pressure switch or relay
Provides an electrical response to a gas, liquid or other pressure condition.
SLD / Schematic · 63
What it represents
Provides an electrical response to a gas, liquid or other pressure condition.
In a drafting package, connect this reference to the monitored vessel or compartment and sensor contact. The associated drawing should trace the pressure alarm, trip or permissive path; the number identifies the role and does not specify the terminal arrangement, ratings or operating settings.
How to read it
- Identify the monitored vessel or compartment and sensor contact.
- Trace the pressure alarm, trip or permissive path.
Information to show or reference
- Label the monitored vessel or compartment and sensor contact.
- Cross-reference the pressure alarm, trip or permissive path.
- Identify the device tag, manual revision and logic drawing that define this implementation.
A distinction that matters
Pressure supervision is not automatically a Buchholz gas-accumulation function; identify the sensor and the actual operating quantity.
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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