3WA1 FRAME
Frame I
A compact frame for standard main-distribution duties.
- Mounting
- Fixed / withdrawable
- Poles
- 3P / 4P
SIEMENS · SENTRON SERIES
SENTRON 3WA1 Air Circuit Breaker
A high-reliability platform for power distribution and industrial applications
SENTRON 3WA1 air circuit breakers protect low-voltage incomers, bus couplers and high-current feeders. Three frame sizes cover a broad rating range, with electronic protection, metering and communications configured to the project.
- High breaking capacityFor main distribution and high fault levels
- System protectionSupports selectivity and withstand studies
- Modular designSimplifies installation, options and service
- Digital integrationSupports metering, status and industrial networks
AC 630–6300 ARated current
DC up to 4000 ADC application
IEC up to 690 V ACRated voltage
55–150 kA @ 500 V ACIcu
3P / 4PPoles
Fixed / withdrawableMounting
PRODUCT ARCHITECTURE
A modular architecture for diverse applications
Three frames, electronic trip units and fixed or withdrawable mounting cover incomers, bus couplers and high-current feeders.
3WA1 FRAME
Frame II
For higher-capacity distribution and bus-coupler duties with metering and connectivity options.
- Mounting
- Fixed / withdrawable
- Poles
- 3P / 4P
3WA1 FRAME
Frame III
For the upper current range and high-breaking-capacity applications.
- Mounting
- Fixed / withdrawable
- Poles
- 3P / 4P
TECHNICAL DATA
Core technical range
Use these published 3WA1 ranges for early project definition. Confirm final ratings against the complete designation and duty.
- Rated current (AC)
- 630–6300 A
- DC application
- Up to 4000 A
- Rated operational voltage
- IEC up to 690 V AC
- Ultimate short-circuit breaking capacity (Icu)
- 55–150 kA @ 500 V AC
- Poles
- 3P / 4P
- Mounting
- Fixed / withdrawable
- Electronic trip units
- ETU300 / ETU600
- Connectivity
- PROFINET IO · Modbus TCP / RTU
TRIP UNITS & CONNECTIVITY
Intelligent protection and open connectivity
Select the trip unit and connectivity package from the required protection, metering and system-integration scope.
ETU300 electronic trip unit
For core protection duties; confirm L/S/I/G functions from the complete configuration.
ETU600 electronic trip unit
Supports extended protection, metering, diagnostics and system integration.
Connectivity and integration
PROFINET IO and Modbus TCP / RTU options are available; confirm the required modules per project.
INSTALLATION & ACCESSORIES
Flexible installation and practical service
Coordinate fixed or withdrawable construction and accessories with panel design, operation and maintenance strategy.
Fixed mounting
A compact arrangement for standard switchboards.
Withdrawable mounting
Supports isolation, testing, maintenance and rapid replacement.
Safety and interlocking
Coordinate mechanical, electrical and key interlocks with the panel.
Accessory options
Confirm motor operator, coils, auxiliary and position contacts.
SELECTION WORKFLOW
Engineering selection and project workflow
- 01
Requirements
Define voltage, current, fault level and load duty.
- 02
System design
Choose frame, poles, mounting and protection scope.
- 03
Technical review
Confirm Icu, Ics, Icw, trip unit and selectivity.
- 04
Quotation
Submit configuration, quantity, delivery and destination.
- 05
Delivery
Confirm accessories, control voltage, wiring and panel interface.
- 06
Operation
Maintain settings, test results and spare-parts records.
APPLICATIONS
Designed for a wide range of distribution duties
Buildings
Commercial, transport and public-facility distribution.
Manufacturing
Plant incomers, bus couplers and high-current feeders.
Data centers
Critical power distribution and selective protection.
Energy and utilities
Generation, distribution and utility systems.
Infrastructure
Ports, airports, rail and municipal projects.
Other industries
Water, chemical, metals and process facilities.
RFQ CHECKLIST
Information required for quotation
Provide these details for faster configuration review.
- Project and applicationDefines the system duty
- Current and voltageAC / DC and frequency
- Breaking requirementsIcu, Ics and Icw
- MountingFixed or withdrawable
- Poles and neutral3P / 4P
- Trip unitETU300 / ETU600
- CommunicationsPROFINET or Modbus
- Accessories and interlocksCoils, contacts and interlocks
- Quantity and deliveryTarget date and quantity
RELATED SERIES
SENTRON low-voltage circuit-breaker series
Compare current range, standards and retrofit constraints before confirming the applicable series.
