Microprocessor based overload relay - 3RB (Class 10E) - 3RB3016-1PB0

Product Description

Siemens 3RB3016-1PB0 Electronic Overload Relay – Class 10E Motor Protection for Industrial Applications

The Siemens 3RB3016-1PB0 Electronic Overload Relay is a microprocessor-based motor protection relay from the trusted SIRIUS 3RB3 Series, engineered to provide reliable protection for three-phase motors against overload, phase failure, and phase imbalance conditions. Designed for industrial automation systems, motor starters, and control panels, this solid-state overload relay delivers precise thermal motor protection while helping reduce downtime and extend equipment life. The relay features a 1A to 4A adjustable current range, Class 10E tripping characteristic, and compact Size S00 design for seamless integration into industrial motor control systems.

Unlike traditional thermal overload relays that use bimetallic elements, the 3RB3016-1PB0 utilizes advanced electronic current sensing and microprocessor-controlled evaluation technology. This intelligent protection system continuously monitors motor current and thermal conditions, providing highly accurate overload detection and improved repeatability. By identifying abnormal operating conditions before excessive heat damages motor windings, the relay helps reduce maintenance costs and improve operational reliability.

The relay incorporates a Class 10E tripping characteristic, making it ideal for motors operating under normal starting conditions. Class 10E protection delivers fast response to overload situations while allowing standard motor acceleration without nuisance tripping. Typical applications include pumps, fans, compressors, conveyors, HVAC systems, packaging machinery, and general industrial motor control applications.

With an adjustable current setting range of 1A to 4A, the Siemens 3RB3016-1PB0 is particularly suitable for protecting smaller motors and specialized industrial equipment. The relay provides inverse-time delayed overload protection that closely matches actual motor heating characteristics, ensuring effective protection while minimizing unnecessary shutdowns.

A major advantage of the 3RB3016-1PB0 Motor Protection Relay is its integrated phase failure and phase loss protection. The relay continuously monitors all three motor phases and automatically trips when dangerous operating conditions occur. This proactive protection helps prevent overheating, winding damage, and costly motor failures caused by single-phasing conditions.

The relay is designed for direct mounting onto compatible Siemens 3RT2015, 3RT2016, 3RT2017, and 3RT2018 contactors, creating a compact and efficient motor starter assembly. Durable screw-type terminals for both the main and auxiliary circuits ensure secure electrical connections and reliable long-term performance in demanding industrial environments.

For enhanced monitoring and automation integration, the relay includes 1 Normally Open (1NO) and 1 Normally Closed (1NC) auxiliary contacts. These contacts can be used for overload trip indication, PLC interfacing, alarm signaling, remote monitoring, and control circuit interruption, improving system diagnostics and operational visibility.

The Siemens 3RB3016-1PB0 supports both manual and automatic reset functions, allowing users to select the most suitable recovery method for their application. Automatic reset helps minimize downtime in automated systems, while manual reset provides enhanced operational safety where operator verification is required before restarting equipment.

Manufactured according to IEC 60947-4-1 standards, the relay offers reliable operation in industrial environments, with operating temperatures from -25°C to +60°C, IP20 protection, and dependable Siemens engineering. It is widely used in manufacturing plants, HVAC systems, water treatment facilities, packaging machinery, and industrial automation projects.