Product Overview

Timing relay, electronic with star-delta (wye-delta) function 1 NO delayed 1 NO instantaneous 1 time range, 1...20 s 12-240 V AC/DC at 50/60 Hz AC screw terminal

This specialized electronic timing relay (Article Number: 3RP2574-1NW30) from the SIRIUS 3RP25 series is specifically designed for star-delta (wye-delta) motor starting applications. The device features one normally open delayed contact and one normally open instantaneous contact with a dedicated time range of 1 to 20 seconds. Operating on a wide voltage range of 12-240 V AC/DC at 50/60 Hz AC, it provides reliable timing control for reduced-voltage motor starting sequences with screw terminal connections.

Key Features

• Star-delta (wye-delta) function specifically designed for motor starting applications
• 1 NO delayed contact for timed star-delta switching
• 1 NO instantaneous contact for immediate control functions
• Dedicated time range 1 to 20 seconds optimized for motor starting
• Wide voltage range 12-240 V AC/DC at 50/60 Hz AC for universal compatibility
• Electronic timing control for precise and reliable operation
• Screw terminal connections for secure and reliable wiring
• Specialized motor starting application focus
• Compact design for efficient panel space utilization

Technical Specifications

• Net Weight: 0.152 kg
• Packaging Dimensions: 36.00 x 109.00 x 126.00 mm
• Packaging Quantity: 1 piece
• Quantity Unit: 1 Piece
• Country of Origin: Germany
• Supply Voltage: 12-240 V AC/DC at 50/60 Hz AC
• Contact Configuration: 1 NO delayed + 1 NO instantaneous
• Time Range: 1 to 20 seconds
• Terminal Type: Screw terminals
• Application: Star-delta motor starting

Applications

• Large motor starting requiring reduced-voltage star-delta method
• Industrial motor control with soft-start requirements
• Pump motor starting in water treatment and distribution systems
• Compressor motor starting in HVAC and refrigeration systems
• Fan motor starting in industrial ventilation systems
• Conveyor motor starting in material handling applications
• Manufacturing equipment with large three-phase motors
• Process control systems requiring controlled motor acceleration

Star-Delta Motor Starting Benefits

• Reduced starting current typically 25-30% of direct-on-line starting
• Lower mechanical stress on motor windings and connections
• Reduced voltage drop in electrical supply systems
• Smooth acceleration minimizing mechanical shock
• Extended motor life through controlled starting
• Compliance with utility requirements for large motor starting
• Energy-efficient operation during motor acceleration phase

Installation Benefits

• Specialized timing function designed for motor starting applications
• Precise timing control with 1-20 second range
• Universal voltage compatibility with 12-240 V AC/DC range
• Secure connections with screw terminal design
• Reliable operation in demanding industrial environments
• Compact footprint for efficient panel space utilization
• Professional appearance maintaining system aesthetics
• Dedicated application focus for optimal performance

Compatibility

• 12-240 V AC/DC power systems for versatile installation
• Three-phase motor control systems requiring star-delta starting
• Industrial control panels with motor starting requirements
• Motor control centers with reduced-voltage starting needs
• Standard DIN rail mounting systems
• Control cabinet installations with motor starting applications

Motor Starting Sequence

• Star configuration initial connection for reduced starting current
• Timing delay adjustable from 1 to 20 seconds
• Delta switching after predetermined time for full-speed operation
• Instantaneous contact for auxiliary control functions
• Smooth transition from star to delta configuration

Product Classifications

• Product Lifecycle: PM300 Active Product
• eClass: 27-37-16-05 (versions 8-14)
• ETIM: EC001439 (versions 7, 8 & 9)
• UNSPSC: 39-12-23-29

Compliance & Certifications

• Export Control: AL: N / ECCN: N
• RoHS Compliance: Since 12.09.2014
• WEEE Take-Back Obligation: Yes

REACH Compliance

Information obligation imposed by Article 33, REACH Regulation: This product includes articles containing substances from the candidate list in concentrations higher than 0.1% weight by weight (w/w): Lead, Lead monoxide (lead oxide), 2-methyl-1-(4-methylthiophenyl)-2-morpholinopropan-1-one, and 6,6'-di-tert-butyl-2,2'-methylenedi-p-cresol. Based on current information, these substances do not pose risk when used as intended, including disposal. Please refer to product documentation for additional guidance.

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For technical documentation and CAD files, please visit:

• Official Product Datasheet (PDF)
• Siemens Industry Mall Product Page
• SIRIUS 3RP25 Timing Relays Product Family
• Siemens PARTcommunity for 3D CAD Models
• Siemens Technical Support Center for technical documentation requests