# Vacuum-interrupter breaker reference Canonical URL: https://eloragrid.ai/symbols/vacuum-interrupter-breaker-reference Publisher: Elora Grid Updated: 2026-11-03 Lookup label: VBR Drawing use: Schematic Reference families: Manufacturer Representation: Functional block Installation focus: switchgear Input: Power path and operating mechanism Output: Interrupted circuit path Identifies a circuit-breaker application in which interruption takes place within vacuum interrupters. ## In plain English ### What this block does Identifies a circuit-breaker application in which interruption takes place within vacuum interrupters. ### A simple example In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Power path and operating mechanism” at the input and “Interrupted circuit path” at the output. The generic breaker mark does not specify vacuum ratings. ### What the drawings help you do Start at the named input: Power path and operating mechanism. Identify its source device or document and the state represented on the drawing. Follow the named output: Interrupted circuit path. Cross-reference its destination and separate the command from confirmation that the equipment responded. ### Terms - Input: Power path and operating mechanism - Output: Interrupted circuit path - Application reference: An explanation of a named drawing function or circuit relationship; the project documents define the equipment and its connections. Concept diagram: Power path and operating mechanism → VBR → Interrupted circuit path A reading guide. The entry's original illustration and input/output facts describe this application. - [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html) ## What it represents Identifies a circuit-breaker application in which interruption takes place within vacuum interrupters. A switching-device operating reference adds the specific mechanism or duty context needed to interpret its place in a power circuit. The same basic switching outline can serve different equipment constructions, so the added description must remain attached to its device tag. In a medium-voltage switchgear drawing, the operating reference helps the reader distinguish the interrupting device from its isolation, earthing and auxiliary-control interfaces. For this reference, the drawing identifies “Power path and operating mechanism” at the input and “Interrupted circuit path” at the output. The generic breaker mark does not specify vacuum ratings. Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint. 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: Power path and operating mechanism. Identify its source device or document and the state represented on the drawing. - Follow the named output: Interrupted circuit path. Cross-reference its destination and separate the command from confirmation that the equipment responded. - The generic breaker mark does not specify vacuum ratings. - Use the device schedule for its actual construction, operating duty and ratings. These original functional illustrations describe the named role and do not certify a standard glyph or product footprint. ## Information to show or reference - Label the source and connection reference for power path and operating mechanism. - Identify the destination and defined state of interrupted circuit path. - Record the equipment or control-document revision supporting this functional block. - Check this application limit in the project design: The generic breaker mark does not specify vacuum ratings. ## Important distinction The generic breaker mark does not specify vacuum ratings. 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: Switchgear - Input / boundary: Power path and operating mechanism - Output / connection: Interrupted circuit path - Lookup label: VBR is a library lookup label, not a standard device designation. ## Public references - [High-voltage circuit breakers](https://www.siemens-energy.com/global/en/home/products-services/product-offerings/circuit-breakers.html) — Siemens Energy. Public technical context for switching-device operating references. Circuit-breaker construction and interruption families. 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.