# Station charger float-charge interface Canonical URL: https://eloragrid.ai/symbols/station-charger-float-charge-interface Publisher: Elora Grid Updated: 2026-11-03 Lookup label: SCFI Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: substations Input: Charger control and battery condition Output: Float-charge operating state Identifies the charger operating interface that maintains the battery at its specified standby charge condition. ## In plain English ### What this block does Identifies the charger operating interface that maintains the battery at its specified standby charge condition. ### 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 “Charger control and battery condition” at the input and “Float-charge operating state” at the output. Charge settings depend on battery chemistry and equipment. ### What the drawings help you do Start at the named input: Charger control and battery condition. Identify its source device or document and the state represented on the drawing. Follow the named output: Float-charge operating state. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Charger control and battery condition - Output: Float-charge operating state - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Charger control and battery condition → SCFI → Float-charge operating state 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 Identifies the charger operating interface that maintains the battery at its specified standby charge condition. 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 “Charger control and battery condition” at the input and “Float-charge operating state” at the output. Charge settings depend on battery chemistry and equipment. 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: Charger control and battery condition. Identify its source device or document and the state represented on the drawing. - Follow the named output: Float-charge operating state. Cross-reference its destination and separate the command from confirmation that the equipment responded. - Charge settings depend on battery chemistry and equipment. - 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 charger control and battery condition. - Identify the destination and defined state of float-charge operating state. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: Charge settings depend on battery chemistry and equipment. ## Important distinction Charge settings depend on battery chemistry and equipment. 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: Charger control and battery condition - Output / connection: Float-charge operating state - Lookup label: SCFI 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.