GA
Station DC battery rack
A battery rack supports cells or modules for a stationary auxiliary DC system.
General arrangement objects
Functional block · SDFSB
Station DC feeder selectivity boundary
Functional block · Substations
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
Shows the protective-device relationship considered when assigning downstream DC fault isolation.
A simple example
In a substation control building, the battery can support breaker trip circuits while the charger AC supply is unavailable. Supervision must identify whether the charger, battery or a downstream feeder is affected. For this reference, the drawing identifies “DC feeder protective devices” at the input and “Defined protection relationship” at the output. Selectivity requires a DC protection assessment.
What the drawings help you do
Start at the named input: DC feeder protective devices. Identify its source device or document and the state represented on the drawing. Follow the named output: Defined protection relationship. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Input
- DC feeder protective devices
- Output
- Defined protection relationship
- Application reference
- An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections.
Read the source: MicroGenius S2/S4 battery charger technical manual
Schematic · SDFSB
What it represents
Shows the protective-device relationship considered when assigning downstream DC fault isolation. A station battery system supplies protection, control and other assigned DC loads through a documented charger and distribution arrangement. Charger output, battery contribution and load distribution are related but separately monitored paths.
In a substation control building, the battery can support breaker trip circuits while the charger AC supply is unavailable. Supervision must identify whether the charger, battery or a downstream feeder is affected. For this reference, the drawing identifies “DC feeder protective devices” at the input and “Defined protection relationship” at the output. Selectivity requires a DC protection assessment.
Identify every source, protective device, isolation boundary and return. Battery capacity, DC fault duty, charging settings and ventilation require the selected battery-system design; illustrative circuits do not establish autonomy. 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: DC feeder protective devices. Identify its source device or document and the state represented on the drawing.
- Follow the named output: Defined protection relationship. Cross-reference its destination and separate the command from confirmation that the equipment responded.
- Selectivity requires a DC protection assessment.
- Identify every source, protective device, isolation boundary and return. Battery capacity, DC fault duty, charging settings and ventilation require the selected battery-system design; illustrative circuits do not establish autonomy.
Information to show or reference
- Label the source and connection reference for dc feeder protective devices.
- Identify the destination and defined state of defined protection relationship.
- Record the equipment or control-document revision supporting this functional block.
- Check this application limit in the project design: Selectivity requires a DC protection assessment.
A distinction that matters
Selectivity requires a DC protection assessment. 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.
MicroGenius S2/S4 battery charger technical manual
Public technical context for station battery and charger distribution. Battery charging modes, DC distribution interfaces and charger alarms. 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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