Motor feeder protection
SIRIUS 3RV2 Motor Starter Protectors
Manual motor starter protectors and circuit breakers for overload and short-circuit protection in coordinated industrial feeders.
Used at the front of a motor feeder to isolate faults and protect equipment, often combined with a SIRIUS contactor or compact starter assembly.
Request exact article number Selection is confirmed against motor, I/O, network and destination data.
Technical parameters
Selection data
These values describe the product family and the decisions behind selection. The exact datasheet is tied to the complete Siemens article number.
ParameterFamily rangeEngineering note
Frame sizesS00, S0, S2 and S3 portfolioSelect the smallest suitable adjustable current range and breaking capacity.
ProtectionOverload and magnetic short-circuit releaseTrip class and motor starting current must avoid nuisance operation.
ApplicationsMotors, starters, transformers and selected feeder dutiesUse the correct device variant for the protected load.
TerminalsScrew and spring-type options by sizeCheck conductor range and temperature rating.
OperationLockable manual mechanismDoor coupling and lockout requirements must be defined in panel design.
CoordinationCompatible SIRIUS switching assembliesUse manufacturer-tested combinations for the required fault level.
Common search questions
Quick answers for SIRIUS 3RV2 Motor Starter Protectors.
Family guidance narrows the request. The exact Siemens article number remains the final commercial and technical identity.
What is SIRIUS 3RV2 Motor Starter Protectors best suited for?
Used at the front of a motor feeder to isolate faults and protect equipment, often combined with a SIRIUS contactor or compact starter assembly. Typical applications include pump feeders, fan starters, conveyor motors.
Which information is required to select SIRIUS 3RV2 Motor Starter Protectors?
Start with motor rated current and voltage, starting method and duty, prospective short-circuit current, required coordination type. Final ratings and accessories are confirmed against the full article number and current manufacturer data.
Can SIRIUS 3RV2 Motor Starter Protectors be quoted from a model name only?
A model name identifies a family, not always the exact hardware. Honghao checks the complete article number, electrical data, options, accessories, lifecycle status, quantity and destination before confirming the offer.
Good fit
Use it when
- Motor feeders
- Compact starters
- MCC buckets
- Machine auxiliary circuits
Selection limits
Check before specifying
- The setting must match motor full-load current and duty
- System fault level and coordination cannot be assumed from motor kW
- Exact ratings, functions, approvals and lifecycle status depend on the complete Siemens article number and firmware. Honghao confirms these against the requested BOM before quotation.
Strengths
Why this family
- Motor-focused overload protection
- Fast short-circuit disconnection
- Compact integration with SIRIUS contactors
- Lockable operating mechanism
Typical BOM
Accessories
- Auxiliary and alarm contacts
- Shunt or undervoltage releases
- Door-coupling mechanism
- Contactor link module
- Infeed system
Application data
What to send
- Motor rated current and voltage
- Starting method and duty
- Prospective short-circuit current
- Required coordination type
- Terminal and door-operation requirements
Technical basis
Manufacturer data remains the final reference.
Honghao uses family-level guidance to structure the enquiry. Final ratings, options, certificates and lifecycle status are checked against the exact article number and current manufacturer documentation.
Typical applications
Where it is used
RFQ checklist
Get a usable quotation
Send the full article number if it is a replacement. For a new application, send the project data listed above, quantity, destination country and required delivery date.
Send BOM or application dataExact configuration