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 · GGLI
GIS gas-density lockout 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
Receives the manufacturer's assigned gas-condition blocking output for the documented operation.
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 “Gas-condition lockout contact” at the input and “Assigned operation block” at the output. Different operations can have different blocking rules.
What the drawings help you do
Start at the named input: Gas-condition lockout contact. Identify its source device or document and the state represented on the drawing. Follow the named output: Assigned operation block. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- Gas-condition lockout contact
- Output
- Assigned operation block
- 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 · GGLI
What it represents
Receives the manufacturer's assigned gas-condition blocking output for the documented operation. 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 “Gas-condition lockout contact” at the input and “Assigned operation block” at the output. Different operations can have different blocking rules.
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: Gas-condition lockout contact. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Assigned operation block. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Different operations can have different blocking rules.
- 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 gas-condition lockout contact.
- Identify the destination and defined state of assigned operation block.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Different operations can have different blocking rules.
A distinction that matters
Different operations can have different blocking rules. 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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