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                          • SIEMENS 3RV1421-1KA10 Motor Protection Circuit Breaker

                            Product Overview

                            SIEMENS 3RV1421-1KA10 is a SIRIUS 3RV1 Motor Protection Circuit Breaker designed for transformer protection and industrial circuit protection applications. It provides protection against overload and short-circuit faults and is suitable for use in low-voltage control systems.

                            This model belongs to the S0 frame size and features an adjustable overload release range of 9…12.5 A, Class 10 trip characteristic, screw terminal connection, and standard breaking capacity.

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                            Specifications

                            • Brand: SIEMENS
                            • Series: SIRIUS 3RV1
                            • Model: 3RV1421-1KA10
                            • Product Type: Motor Protection Circuit Breaker / Circuit Breaker
                            • Application: Transformer Protection / Motor Protection
                            • Frame Size: S0
                            • Number of Poles: 3 Pole
                            • Trip Class: Class 10
                            • Overload Current Setting Range: 9…12.5 A
                            • Magnetic Short-Circuit Release: Approx. 260 A
                            • Rated Voltage: Up to 690 V AC
                            • Rated Frequency: 50/60 Hz
                            • Connection Type: Screw Terminal
                            • Auxiliary Contact: Available
                            • Protection Rating: IP20 (front)
                            • Operating Temperature: -20…+60 °C
                            • Mechanical Life: Approx. 100,000 switching cycles
                            • Rated Impulse Withstand Voltage: 6 kV

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                            Advantages & Features

                            • Provides reliable overload and short-circuit protection
                            • Compact S0 size for space-saving cabinet installation
                            • Adjustable current setting for flexible protection configuration
                            • Class 10 trip characteristic suitable for motor applications
                            • Compatible with Siemens SIRIUS contactor systems
                            • Supports auxiliary contact expansion
                            • Designed for industrial control panels and switchgear applications
                            • Reliable Siemens protection technology

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                            Applications

                            • Motor control centers (MCC)
                            • Industrial machinery
                            • Transformer protection circuits
                            • Pump and fan systems
                            • Factory automation equipment
                            • Electrical control cabinets
                            • Low-voltage switchgear systems
                            • Motor starter assemblies

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                            Precautions

                            • Confirm the current adjustment range matches the protected equipment
                            • Check compatibility with contactors and accessories
                            • Verify wiring and terminal tightening torque
                            • Do not exceed rated voltage and breaking capacity
                            • Disconnect power before installation or maintenance
                            • Perform protection function testing after installation

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