Tap-position analogue-input interface

What it represents

Identifies an analogue position signal supplied by the selected tap-position transmitter. Transformer regulation changes the selected winding connection to influence voltage, while cooling control manages the installed fans and pumps. Commands, mechanical position and measured results belong to different parts of the diagram.

In a substation, a voltage regulator can request a tap change and check the resulting tap-position feedback. A separate controller stages cooling equipment according to the transformer manufacturer's defined conditions. For this reference, the drawing identifies “Position transmitter signal” at the input and “Measured tap-position input” at the output. Signal scaling follows the actual transmitter.

Keep tap-change permission, limit contacts, movement indication and measured voltage distinct. Actual tap positions, time delays, cooling ratings and allowable parallel operation require the selected transformer control design. 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: Position transmitter signal. Identify its source device or document and the state represented on the drawing.
• Follow the named output: Measured tap-position input. Cross-reference its destination and separate the command from confirmation that the equipment responded.
• Signal scaling follows the actual transmitter.
• Keep tap-change permission, limit contacts, movement indication and measured voltage distinct. Actual tap positions, time delays, cooling ratings and allowable parallel operation require the selected transformer control design.

Information to show or reference

• Label the source and connection reference for position transmitter signal.
• Identify the destination and defined state of measured tap-position input.
• Record the equipment or control-document revision supporting this functional block.
• Check this application limit in the project design: Signal scaling follows the actual transmitter.

Sources you can follow

These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.

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.