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Need help?Do you have a question about the Siemens SIRIUS 3RU and is the answer not in the manual?
General| Brand | Siemens |
|---|---|
| Model | SIRIUS 3RU |
| Category | Control Unit |
| Language | English |
Outlines user responsibilities, manual purpose, and scope.
Covers energy efficiency benefits, required knowledge, online support, and further documentation.
Details the DataMatrix code and how to obtain technical assistance.
Lists device and EMC standards that the relays meet.
Points to other standards and approvals for SIRIUS components.
Introduces 3RU21 thermal and 3RB electronic overload relays.
Describes how relays integrate into systems and available connection types.
Details available versions, sizes, current ranges, and applications.
Explains the benefits of using overload relays in motor feeders.
Provides information on compatible contactors for SIRIUS modular systems.
Explains how relays protect against overload, phase failure, and asymmetry.
Describes tripping classes and time-current characteristics.
Details the internal ground-fault detection capability.
Explains the function and response of auxiliary contacts and operating state indication.
Covers various reset options and additional functionalities like stop function.
Introduces the online tool for system configuration.
Discusses motor protection and overload relay selection for feeders.
Explains how to select relays based on starting conditions.
Details suitability and considerations for use with frequency converters.
Covers short-circuit protection requirements and coordination types.
Provides critical safety guidelines for hazardous environments.
Outlines available mounting methods and direct mounting compatibility.
Specifies minimum clearances and allowed orientations.
Provides step-by-step instructions for mounting on contactors for different sizes.
Explains how to mount relays for stand-alone installations.
Lists available connection technologies for the relays.
Defines permissible conductor sizes and screw tightening specifications.
Addresses touch protection requirements for connection terminals.
Details how to adjust the current setting using the rotary knob.
Explains how to select tripping class and activate ground-fault detection.
Covers both local and remote reset methods.
Describes how to perform and evaluate device tests.
Illustrates how auxiliary contacts behave during operation and testing.
Describes supports for mounting relays individually.
Covers release slides and cable releases for remote reset.
Details the module for electrical remote resetting of 3RU21 relays.
Explains the use of sealable covers to prevent unauthorized manipulation.
Covers for ring cable lugs, busbars, and box terminal blocks.
Guides users to find technical data via Siemens Industry Online Support.
Provides general data and comparative tables for overload relays.
Summarizes protection capabilities and key equipment features.
Explains how to access CAx data for circuit diagrams.
Shows internal wiring diagrams for various 3RU21 models.
Displays internal wiring diagrams for 3RB20, 3RB21, 3RB30, and 3RB31 relays.
Provides typical circuit examples for 3RU and 3RB relays.
Defines coordination type 1 for short-circuit protection.
Defines coordination type 2 for short-circuit protection.
Lists article numbers for specific operating instructions.
Lists available manuals for the SIRIUS modular system.
Provides links for product documentation, information, and technical assistance.
Explains how to access CAx data for dimension drawings.
Provides dimensional drawings for various 3RU21 models.
Shows dimensional drawings for 3RB20 and 3RB21 overload relays.
Displays dimensional drawings for 3RB30 and 3RB31 overload relays.
Provides drilling plans for different 3RT contactor sizes.
Shows dimensions for stand-alone assembly supports.
