Siemens Overload relay for motor protection, size S10/S12, 160-630A

Product Overview

Overload relay providing comprehensive motor protection for high-current 160-630A applications in Size S10/S12 configurations with Class 10E characteristics. This solid-state electronic overload relay offers inverse-time delayed protection for three-phase motors against overload, phase unbalance, and phase failure, featuring busbar main circuit connections and screw terminal auxiliary connections with manual-automatic reset functionality.

Key Features:

• High current range adjustable from 160-630A for heavy-duty motor protection applications
• Size S10/S12 compatibility designed for large industrial contactor applications
• Class 10E tripping characteristics provides precise electronic overload protection with Class 10 response
• Busbar main circuit connection robust power connections for high-current applications
• Screw terminal auxiliary circuit reliable control and signaling connections
• Manual-Automatic reset selectable reset modes for operational flexibility and safety

Technical Specifications:

• Current Range: 160-630A (adjustable)
• Size: S10/S12
• Trip Class: Class 10E
• Power Rating: 450kW capacity
• Protection Type: Electronic overload relay
• Main Circuit Connection: Busbar connection (3 x pass-through busbars)
• Auxiliary Circuit Connection: Screw terminal
• Reset Type: Manual-Automatic
• Contact Configuration: 1NO + 1NC auxiliary contacts
• Net Weight: 1.827 kg
• Country of Origin: Germany

Protection Functions:

• Electronic overload protection inverse-time delayed protection against motor overload conditions
• Phase unbalance tripping detects and protects against phase asymmetry
• Phase failure protection monitors and responds to single-phase or phase loss conditions
• 3-phase overload protection with enhanced phase loss sensitivity
• Temperature compensation ambient compensated operation range from -20°C to 60°C
• Solid-state test function built-in test capability for system verification

Advanced Features:

• Wide current setting ranges covers complete motor series with fewer relay types
• Low heat loss operation energy-efficient design reduces control cabinet temperature rise
• Rotary knob adjustment for setting rated motor current
• Switching position indicator visual indication of relay status
• Internal power supply self-powered operation from main circuit
• Test trip function manual test capability for maintenance verification

Installation Options:

• Contactor mounting direct mounting to compatible SIRIUS S10/S12 contactors
• Stand-alone installation independent mounting for flexible system design
• Lug connections for incoming and outgoing main circuits
• Vibration-proof connections robust terminal design for industrial environments

System Integration: Solid-state overload relay SIRIUS 3RB2 designed for demanding high-current applications with comprehensive motor protection. The wide current setting ranges and various tripping characteristics enable complete motor series coverage with standardized protection solutions.

Compliance & Certifications:

• IEC rated for international applications
• UL/CSA approvals for North American markets
• ATEX certification for hazardous area applications
• RoHS directive compliant since July 1, 2006
• WEEE take-back obligation compliant
• REACH regulation compliant with substance information disclosure

Shipping Details:

• Net Weight: 1.827 kg
• Packaging Dimensions: 154mm x 156mm x 177mm
• EAN: 4011209638396

Download existing graphical data for this product:

Product Datasheet

SIRIUS 3RB Electronic Overload Relays Catalog

SIRIUS Overload Relay Technical Documentation

High-Current Motor Protection Guide