TX
Power transformer
Equipment transferring electrical power between winding circuits.
SLD / Schematic
Functional block · THBR
Transformer high-voltage bushing reference
Functional block · Switchyards
An independently authored application reference. The drawing shows the named function or circuit relationship; use the project legend and selected equipment documentation for its drafting form and connections.
Browse this installation focusIn plain English
What this block does
Identifies the insulated conductor passage between the transformer winding system and its external terminal.
A simple example
In a switchyard equipment diagram, the primary reference identifies the electrical role of an installed component while the linked equipment schedule and manufacturer drawing supply its exact construction and dimensions. For this reference, the drawing identifies “Transformer winding connection” at the input and “External high-voltage terminal” at the output. A bushing is not a separate switching device.
What the drawings help you do
Start at the named input: Transformer winding connection. Identify its source device or document and the state represented on the drawing. Follow the named output: External high-voltage terminal. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Transformer winding connection
- Output
- External high-voltage terminal
- Application reference
- An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.
Read the source: Gas-insulated switchgear
Schematic · THBR
What it represents
Identifies the insulated conductor passage between the transformer winding system and its external terminal. High-voltage primary equipment carries, interrupts, measures or conditions the main power circuit. Its function, insulation arrangement and equipment boundaries need to be distinguished from the secondary signals used to control it.
In a switchyard equipment diagram, the primary reference identifies the electrical role of an installed component while the linked equipment schedule and manufacturer drawing supply its exact construction and dimensions. For this reference, the drawing identifies “Transformer winding connection” at the input and “External high-voltage terminal” at the output. A bushing is not a separate switching device.
Read the connected power path before interpreting a secondary output or alarm. These original educational component references provide no product dimensions, dielectric rating, installation clearance or construction approval. The functional block is an independent explanation of this named application. Equipment-specific ratings, terminal connections and operating conditions must be established in the project documentation.
How to read it
- Start at the named input: Transformer winding connection. Identify its source device or document and the state represented on the drawing.
- Follow the named output: External high-voltage terminal. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- A bushing is not a separate switching device.
- Read the connected power path before interpreting a secondary output or alarm. These original educational component references provide no product dimensions, dielectric rating, installation clearance or construction approval.
Information to show or reference
- Label the source and connection reference for transformer winding connection.
- Identify the destination and defined state of external high-voltage terminal.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: A bushing is not a separate switching device.
A distinction that matters
A bushing is not a separate switching device. This reference describes the named application; it does not establish a new IEC graphical symbol, an ANSI device-function number or an exact manufacturer connection diagram.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Gas-insulated switchgear
Public technical context for high-voltage primary equipment references. Primary switching equipment and instrument-transformer interfaces. The application text and educational graphic are independently authored; the publisher does not certify this representation.
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. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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