PD
Partial discharge sensor
Sensor on switchgear, cables or transformers that picks up signals from partial discharge for insulation condition monitoring.
SLD / Schematic
Functional block · YTHA
Yard terminal-cabinet humidity alarm
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 measured humidity condition used by the selected cabinet supervisory function.
A simple example
In a switchyard marshalling kiosk, gas compartment, operating mechanism and cabinet-service indications are collected for the station controller. Their equipment tags identify the actual compartment or mechanism being monitored. For this reference, the drawing identifies “Cabinet humidity” at the input and “Cabinet humidity alarm” at the output. The sensor covers a defined local environment.
What the drawings help you do
Start at the named input: Cabinet humidity. Identify its source device or document and the state represented on the drawing. Follow the named output: Cabinet humidity alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Cabinet humidity
- Output
- Cabinet humidity alarm
- Application reference
- An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.
Read the source: Modular switchgear monitoring
Schematic · YTHA
What it represents
Identifies the measured humidity condition used by the selected cabinet supervisory function. Yard equipment supervision carries the condition and support-system information of primary equipment into station alarms. A monitor's declared alarm, measurement and self-fault output need separate point names.
In a switchyard marshalling kiosk, gas compartment, operating mechanism and cabinet-service indications are collected for the station controller. Their equipment tags identify the actual compartment or mechanism being monitored. For this reference, the drawing identifies “Cabinet humidity” at the input and “Cabinet humidity alarm” at the output. The sensor covers a defined local environment.
Keep primary-device identity, compartment boundaries and monitor health visible. A monitoring illustration does not establish a leak rate, operating threshold or remaining equipment life. 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: Cabinet humidity. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Cabinet humidity alarm. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- The sensor covers a defined local environment.
- Keep primary-device identity, compartment boundaries and monitor health visible. A monitoring illustration does not establish a leak rate, operating threshold or remaining equipment life.
Information to show or reference
- Label the source and connection reference for cabinet humidity.
- Identify the destination and defined state of cabinet humidity alarm.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: The sensor covers a defined local environment.
A distinction that matters
The sensor covers a defined local environment. 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.
Modular switchgear monitoring
Public technical context for switchyard equipment condition interfaces. Gas, operating mechanism and circuit-breaker condition monitoring. 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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