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 · YMCI
Yard monitoring communications-fault interface
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
Reports loss of the selected equipment-monitoring communication path.
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 “Monitor link health” at the input and “Condition-data communication fault” at the output. Protection and monitoring can use different paths.
What the drawings help you do
Start at the named input: Monitor link health. Identify its source device or document and the state represented on the drawing. Follow the named output: Condition-data communication fault. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Monitor link health
- Output
- Condition-data communication fault
- 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 · YMCI
What it represents
Reports loss of the selected equipment-monitoring communication path. 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 “Monitor link health” at the input and “Condition-data communication fault” at the output. Protection and monitoring can use different paths.
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: Monitor link health. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Condition-data communication fault. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Protection and monitoring can use different paths.
- 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 monitor link health.
- Identify the destination and defined state of condition-data communication fault.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Protection and monitoring can use different paths.
A distinction that matters
Protection and monitoring can use different paths. 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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