# ANSI/IEEE Residual-current breaker with overcurrent protection form Canonical URL: https://eloragrid.ai/symbols/ansi-residual-current-breaker-with-overcurrent-protection Publisher: Elora Grid Updated: 2026-10-28 Lookup label: RCBO Drawing use: SLD, Schematic Reference families: IEEE / ANSI, Manufacturer ## Symbol convention Convention: IEEE / ANSI Form: Magneto/Thermal with Differential Autodesk IEEE Symbol Preview: 1 Pole Circuit Breakers, block HCB11Q13. Matching functional counterpart linked separately. Independently drawn educational geometry; not a certified IEEE glyph or database identifier. Related representation: [Residual-current breaker with overcurrent protection](https://eloragrid.ai/symbols/residual-current-breaker-with-overcurrent-protection) IEEE-library form of residual-current breaker with overcurrent protection: an RCBO combines residual-current operation with overcurrent protection in one device. ## In plain English ### What does ANSI/IEEE Residual-current breaker with overcurrent protection form mean? This reference locates residual-current breaker with overcurrent protection in Autodesk's IEEE-oriented 1 pole circuit breakers family. An RCBO combines residual-current operation with overcurrent protection in one device. It is often shown as a combined protective function rather than as two unrelated devices. The public library uses HCB11Q13 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. ### A simple example Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits. ### What the drawings help you do Identify which neutral connection is switched, sensed or permanently connected for the selected model. An RCBO differs from an RCCB by its integral overcurrent protective function. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ### This particular reference IEEE-library form of residual-current breaker with overcurrent protection: an RCBO combines residual-current operation with overcurrent protection in one device. An RCBO differs from an RCCB by its integral overcurrent protective function. ### Terms - Terminal: An identified point where a conductor connects. - Rating: A value stating the conditions for which equipment is specified. - Schematic: A drawing showing function and connections rather than physical appearance. Concept diagram: Identify the device and form → Read the connections and state → Check the equipment reference A guide to reading this reference. The original symbol illustration and its drawing notes appear below; these boxes are not a wiring diagram. - [Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7F08A484-0517-4954-BD68-1648DDBC84A1.htm) - [Fundamental characteristics of a circuit-breaker](https://www.electrical-installation.org/enwiki/Fundamental_characteristics_of_a_circuit-breaker) ## What it represents This reference locates residual-current breaker with overcurrent protection in Autodesk's IEEE-oriented 1 pole circuit breakers family. An RCBO combines residual-current operation with overcurrent protection in one device. It is often shown as a combined protective function rather than as two unrelated devices. The public library uses HCB11Q13 for its horizontal representation; this is a vendor block name, not an IEEE standards symbol number. Use the surrounding circuit labels and the project legend to identify the intended operating condition and connection. Carry the same device reference into the schedule or equipment document so the symbol can be reconciled with its real terminals, function and operating limits. Identify which neutral connection is switched, sensed or permanently connected for the selected model. An RCBO differs from an RCCB by its integral overcurrent protective function. The linked functional counterpart explains the same operating role in its own drawing context; agreement of every detailed convention mark is not asserted. ## How to read it - Identify which neutral connection is switched, sensed or permanently connected for the selected model. - The preview is an original explanation of this function. Match the actual drawing convention to its legend and the selected equipment documentation. ## Information to show or reference - Record residual-current type - Record overcurrent curve and rating - Verify neutral terminal connections ## Important distinction An RCBO differs from an RCCB by its integral overcurrent protective function. ## Facts - Convention evidence: Autodesk IEEE Symbol Preview: 1 Pole Circuit Breakers; published form: Magneto/Thermal with Differential. - Public vendor block: HCB11Q13. Vendor library token, not an IEEE symbol number. - Drawing role: Circuit interruption - Identifier status: The short label is a functional lookup label, not an assigned IEC or IEEE symbol number. Any separately listed Autodesk code is a verified vendor block name. - Artwork scope: Original educational geometry. Exact standard graphics, product ratings and terminal pinouts are not certified. ## Public references - [Autodesk IEEE Symbol Preview — 1 Pole Circuit Breakers](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-7F08A484-0517-4954-BD68-1648DDBC84A1.htm) — Autodesk. Public IEEE-oriented 1 Pole Circuit Breakers table explicitly lists HCB11Q13 as Magneto/Thermal with Differential. This supports the vendor convention context, not reproduction of the publisher graphic. - [Fundamental characteristics of a circuit-breaker](https://www.electrical-installation.org/enwiki/Fundamental_characteristics_of_a_circuit-breaker) — Schneider Electric — Electrical Installation Guide. Public documentation of this equipment function or named vendor variant; the illustration is independently authored and is not the source graphic. ## 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.