Microprocessor based overload relay - 3RB (Class 5 to 30E – Settable) - 3RB3113-4TB0

Product Description

Siemens 3RB3113-4TB0 Electronic Overload Relay – Intelligent Motor Protection with Adjustable Class 5E to 30E

The Siemens 3RB3113-4TB0 Electronic Overload Relay is a high-performance microprocessor-based motor protection device engineered to provide accurate and reliable protection for industrial motors operating in demanding environments. As part of the renowned Siemens SIRIUS 3RB3 Series, this electronic overload relay offers advanced protection against overloads, phase failures, phase imbalance conditions, and ground faults. Designed with intelligent monitoring technology and adjustable protection settings, the 3RB3113-4TB0 helps maximize motor lifespan, reduce downtime, and improve overall system reliability. The relay features an adjustable current setting range of 5.5A to 22A and supports selectable Class 5E, 10E, 20E, and 30E trip classes, making it suitable for a broad range of industrial motor applications. The 3RB3 family is specifically designed for optimum inverse-time delayed motor protection in both normal and heavy-duty starting conditions.

Unlike conventional thermal overload relays that depend on bimetal technology, the Siemens 3RB3113-4TB0 utilizes electronic current sensing combined with microprocessor-controlled evaluation. This advanced design continuously monitors motor current and responds rapidly to abnormal operating conditions. By accurately detecting overload conditions before they result in motor overheating, winding damage, or insulation breakdown, the relay helps prevent costly equipment failures and production interruptions. Electronic overload technology also delivers higher precision, repeatability, and long-term reliability compared to traditional thermal protection devices.

One of the major advantages of the 3RB3113-4TB0 Electronic Overload Relay is its adjustable trip class functionality. Users can select between Class 5E, Class 10E, Class 20E, and Class 30E depending on motor starting characteristics and application requirements. Motors with rapid acceleration can utilize lower trip classes, while heavy-duty applications requiring extended startup times can benefit from higher trip classes without nuisance tripping. This flexibility makes the relay suitable for pumps, compressors, fans, conveyors, mixers, material handling systems, HVAC installations, and process automation equipment. The adjustable Class 5E to 30E functionality is a key feature of Siemens SIRIUS 3RB electronic overload relays.

The Siemens 3RB3113-4TB0 is designed for motors operating within a 5.5A to 22A protection range, making it ideal for small and medium-sized industrial motors. The relay supports a wide variety of applications where dependable motor protection is essential. Its broad adjustment range allows panel builders, OEMs, and maintenance teams to reduce inventory complexity while maintaining precise motor protection across multiple installations.

A key safety feature of the 3RB3113-4TB0 Motor Protection Relay is its integrated ground fault detection capability. The relay continuously monitors motor current conditions and can identify developing ground faults before significant damage occurs. This additional layer of protection improves equipment safety, minimizes downtime, and helps prevent expensive motor failures. Ground fault monitoring is especially valuable in critical industrial processes where equipment reliability is essential. Siemens 3RB electronic overload relays incorporate internal ground fault detection as a standard protection feature.

Designed in a compact industrial housing, the relay integrates easily into motor control centers, automation panels, and industrial switchgear systems. The Siemens 3RB3113-4TB0 utilizes reliable screw terminal connections for both main and auxiliary circuits, ensuring secure wiring and long-term electrical reliability. Screw terminals provide excellent vibration resistance and simplify maintenance activities in industrial environments.

For seamless integration into industrial control systems, the relay includes 1 Normally Open (1NO) and 1 Normally Closed (1NC) auxiliary contacts. These contacts can be used for trip indication, fault alarms, PLC monitoring, automation feedback, and motor control circuits. The integrated contact arrangement simplifies wiring while improving diagnostic and monitoring capabilities within the control system.

The relay supports manual reset, automatic reset, and remote reset functions, allowing users to select the most appropriate reset method for their application. Whether installed in standalone motor starter systems or fully automated production facilities, the relay provides operational flexibility while maintaining reliable motor protection. Siemens 3RB series overload relays are specifically designed to support manual and automatic reset functions for improved operational efficiency.

Built according to Siemens' stringent quality standards, the 3RB3113-4TB0 Electronic Overload Relay offers a 690V rated insulation voltage, 6kV surge withstand capability, and dependable performance across a wide operating temperature range. Integrated temperature compensation ensures consistent protection performance regardless of environmental conditions. These characteristics make the relay suitable for manufacturing plants, water treatment facilities, packaging machinery, HVAC systems, material handling equipment, and industrial automation applications.

At SBsmart.in, we supply genuine Siemens industrial automation and motor protection products trusted by OEMs, panel builders, electrical contractors, maintenance professionals, and industrial buyers throughout India. When you purchase the Siemens 3RB3113-4TB0, you receive an authentic Siemens SIRIUS motor protection solution engineered for long-term reliability, enhanced equipment safety, and superior industrial performance.