Siemens Circuit breaker for motor protection, size S2, 22-32A Part number 3RV2031-4EB10

Product Overview

The Siemens 3RV2031-4EB10 is a SIRIUS 3RV2 series motor-protection circuit breaker, size S2, designed to protect three-phase motors against overload and short-circuit faults. It features an adjustable thermal-overload release set between 22 to 32 A and a fixed instantaneous short-circuit release of 416 A. It supports rated service up to 32 A (AC-3 at 400 V) and is suitable for motor loads up to 30 kW at 690 V.

Key Features

• Motor-protection circuit breaker from the Siemens SIRIUS 3RV2 series
• Size designation: S2, for rated currents up to 32 A
• Adjustable overload setting: 22 … 32 A
• Instantaneous short-circuit release: fixed 416 A
• Covers motor loads up to 30 kW at 690 V (AC-3) in a compact assembly
• Main contacts: 3-pole configuration for three-phase systems
• Screw-type terminals for main connections suitable for large cross-sections

Technical Specifications

• Product Series: SIRIUS 3RV2
• Article Number: 3RV2031-4EB10
• Size: S2
• Rated Operational Current (In): 32 A (AC-3, 400 V)
• Overload Release Range (Ir): 22 … 32 A
• Short-circuit Release (Instantaneous): 416 A
• Rated Motor Power (AC-3): 7.5 kW at 230 V, 15 kW at 400 V, 18.5 kW at 500 V, 30 kW at 690 V
• Rated Insulation Voltage (Ui): 690 V
• Surge Voltage Resistance: 6 kV
• Ambient Operating Temperature: –20 °C to +60 °C{index=2}
• Protection Class (Front): IP20

Compliance & Certifications

• Manufactured by Siemens in accordance with the SIRIUS motor-protection standard
• Complies with IEC/EN 60947 and relevant motor-protection standards for low-voltage switchgear

Applications

Ideal for motor-starter applications and industrial automation where three-phase motors require overload protection and short-circuit protection in a compact footprint. Commonly used in conveyor systems, pumps, compressors and machine tools within factory automation and manufacturing environments.