A robot power figure is not an electrical supply design

The number answers a narrower question

A published power-consumption figure can describe one robot and controller under stated conditions without specifying the electrical supply for the completed cell. It may be a typical, nominal or maximum operating value, while the installer still needs voltage and frequency limits, full-load current, protection, short-circuit information, protective earth, isolation, heat and every separately powered device.

Use the figure only inside a configuration-specific electrical record. The buyer needs the whole-cell boundary, qualified design ownership and evidence from the installed system—not a brochure value presented as a circuit design.

Separate the quantities before comparing them

Universal Robots' current UR20 documentation lists nominal operating power with minimum, typical and maximum figures, then separately specifies input ranges, external fuse ranges, grounding, residual-current protection and lockable isolation. UR also treats the 24 V I/O supply separately. These are manufacturer requirements for the documented UR20 configuration, not independent measurements or generic values for another robot or region.

• Typical, nominal and maximum operating power, including the exact motion, payload, program and options behind the value.
• Input voltage, phase, frequency and permitted tolerance for the named controller and regional supply option.
• Full-load or application-dependent current, inrush or other starting demand when specified, and the controller nameplate value.
• Heat loss into the enclosure or room, which is not interchangeable with electrical input power or energy use.
• Internal or external auxiliary-supply capacity for I/O and peripherals, including its protection and limitations.

Start from the exact configured source

ABB's OmniCore E line Revision Q specification separates mains voltage and tolerance, full-load current, short-circuit-current-rating information, external protection, residual-current information and enclosure heat. ABB says current depends on the application, including manipulator size and options, and assigns local electrical requirements to the integrator. These remain ABB claims for listed configurations, not a whole-cell calculation or approval of the upstream installation.

• Robot and controller model, hardware and software revision, supply variant, external axes and installed options.
• End effector, process equipment, safety system, PLC and HMI, vision, networking, cooling and every other separately supplied component.
• The source document, revision, nameplate and definitions for each electrical claim rather than a family-level headline.
• Representative program, motion, payload and duty conditions plus foreseeable demanding and abnormal operating states.
• The responsible electrical, integration, facilities and safety owners and the local rules they must apply.

Design for the complete cell boundary

IEC 60204-1:2016 with Amendment 1:2021 applies to electrical, electronic and programmable electronic equipment of machines and groups of machines, beginning at the supply connection to the machine's electrical equipment. Its public summary includes overcurrent protection, short-circuit-current rating, protective bonding and documentation. That standards-body scope frames the boundary; it does not prescribe a circuit for this article or prove compliance of a robot cell.

• Build a connected-load schedule for the controller, robot, tools, processes, external axes, controls, sensing, networking and cooling.
• Resolve supply characteristics, external fuse or circuit-breaker requirements, conductor and cable conditions and short-circuit rating with qualified people.
• Define protective earthing and bonding, residual-current protection where applicable, disconnecting means and lockable isolation for the complete application.
• Check enclosure and room heat removal under representative use and installed options rather than using one generic loss figure.
• Document interfaces between site distribution, the machine supply, separately powered components and any retained or backup supply.

Decide the power-loss and restoration boundary

Do not infer ride-through, safe state, restart behaviour or UPS suitability from a consumption number. Each behaviour belongs to the integrated control and safety design and must remain tied to its configured evidence.

• Name which robot, control, process, safety, communications and auxiliary supplies disappear under each loss event.
• Define the resulting state, stored-energy controls and what information or function, if any, remains available.
• If a UPS or retained control supply is proposed, state its exact loads, duration, transition behaviour, monitoring, maintenance and failure response.
• Define who may restore power, the required inspections or resets and the conditions for automatic or manual restart.
• Cover partial loss, phase or voltage abnormality, repeated interruption and restoration after maintenance or an emergency stop where relevant.

Verify the as-built electrical installation

ISO 10218-2:2025 publicly covers the integration of industrial robot applications and cells across design, commissioning, operation and maintenance. That scope supports an application-level verification boundary; it does not calculate connected load, disclose electrical design rules here or certify a particular installation.

• Confirm nameplates, supply settings, protective devices, grounding and bonding, disconnects, lockout provisions and separately powered equipment against approved records.
• Measure or otherwise verify supply performance under representative operation, including demanding robot motion and process loads.
• Test controlled power loss and restoration with predefined safe states, alarms, trip outcomes and restart prerequisites.
• Record configuration, instruments, conditions, readings, trips, temperatures, deviations, witnesses and approvals.
• Reopen affected evidence after changes to the robot, controller, options, external axis, tool, process, program, enclosure cooling, supply or protection.

Keep every claim inside its evidence boundary

IEC and ISO are authoritative for the public scope and status of their standards. Universal Robots and ABB are authoritative for their own manuals and named configurations. Agreement that consumption, supply and protection are separate categories does not create a universal fuse, RCD, cable, circuit or UPS prescription.

RobotAtom can record electrical requirements, configuration, claim type, source, assumptions, owners, tests and open actions. It does not design electrical systems, certify electrical or functional safety, approve installations or establish regulatory compliance. The responsible buyer, integrator, qualified electrical people and safety owner must decide what applies and whether the evidence is sufficient.