# Station battery incoming isolation boundary Canonical URL: https://eloragrid.ai/symbols/station-battery-incoming-isolation-boundary Publisher: Elora Grid Updated: 2026-11-03 Lookup label: SBIIB Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: substations Input: Battery output connection Output: Defined battery incoming boundary Marks the assigned isolation connection between the battery and its DC distribution system. ## In plain English ### What this block does Marks the assigned isolation connection between the battery and its DC distribution system. ### 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 “Battery output connection” at the input and “Defined battery incoming boundary” at the output. Battery terminals can remain energized independently. ### What the drawings help you do Start at the named input: Battery output connection. Identify its source device or document and the state represented on the drawing. Follow the named output: Defined battery incoming boundary. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Battery output connection - Output: Defined battery incoming boundary - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Battery output connection → SBIIB → Defined battery incoming boundary A reading guide. The entry's original illustration and input/output facts describe this application. - [MicroGenius S2/S4 battery charger technical manual](https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf) ## What it represents Marks the assigned isolation connection between the battery and its DC distribution system. 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 “Battery output connection” at the input and “Defined battery incoming boundary” at the output. Battery terminals can remain energized independently. 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: Battery output connection. Identify its source device or document and the state represented on the drawing. - Follow the named output: Defined battery incoming boundary. Cross-reference its destination and separate the command from confirmation that the equipment responded. - Battery terminals can remain energized independently. - 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 battery output connection. - Identify the destination and defined state of defined battery incoming boundary. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: Battery terminals can remain energized independently. ## Important distinction Battery terminals can remain energized independently. 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. ## Facts - Representation: Functional block - Installation focus: Substations - Input / boundary: Battery output connection - Output / connection: Defined battery incoming boundary - Lookup label: SBIIB is a library lookup label, not a standard device designation. ## Public references - [MicroGenius S2/S4 battery charger technical manual](https://www.sens-usa.com/hubfs/Controlled%20Files/Manuals/101330_MGS_User_Manual.pdf) — SENS. 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. ## Graphic scope Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.