Microprocessor based overload relay - 3RB (Class 10E) - 3RB3016-1TB0

Product Description

Siemens 3RB3016-1TB0 Electronic Overload Relay – Class 10E Motor Protection Solution

The Siemens 3RB3016-1TB0 Electronic Overload Relay is a high-performance microprocessor-based motor protection device from the trusted SIRIUS 3RB3 Series. Designed for reliable protection of three-phase motors, this electronic overload relay safeguards against overload, phase failure, and phase imbalance conditions while ensuring maximum operational reliability. Featuring a 4A to 16A adjustable current range and a Class 10E tripping characteristic, the relay is ideal for motors operating under normal starting conditions in industrial automation and motor control applications.

Unlike traditional thermal overload relays that rely on bimetallic elements, the 3RB3016-1TB0 uses advanced electronic current sensing and microprocessor-controlled evaluation technology. This intelligent monitoring system continuously evaluates motor current and thermal loading, enabling highly accurate overload protection with improved repeatability and reduced sensitivity to ambient temperature fluctuations. This helps prevent motor winding damage, reduce maintenance costs, and increase equipment lifespan.

The relay incorporates a Class 10E tripping characteristic, making it particularly suitable for motors with standard startup requirements. Class 10E protection delivers rapid response to overload conditions while allowing normal acceleration during startup without nuisance tripping. Typical applications include pumps, fans, compressors, conveyors, HVAC systems, packaging equipment, and general industrial machinery.

With an adjustable current setting range of 4A to 16A, the Siemens 3RB3016-1TB0 supports motor ratings of approximately 2.2 kW to 7.5 kW at 400V, 2.2 kW to 7.5 kW at 500V, and 3 kW to 11 kW at 690V. This flexibility makes it suitable for a wide range of industrial motor protection applications while simplifying inventory management for OEMs and panel builders.

A key advantage of the 3RB3016-1TB0 Motor Protection Relay is its integrated phase failure and phase asymmetry protection. The relay continuously monitors all three motor phases and automatically trips when dangerous conditions are detected, helping prevent overheating, excessive current draw, and costly motor failures caused by single-phasing conditions.

Designed in a compact Size S00 frame, the relay mounts directly onto compatible Siemens contactors, creating a space-saving motor starter assembly. The unit features durable screw-type terminals for both main and auxiliary circuits, ensuring secure wiring and reliable long-term performance in demanding industrial environments.

For enhanced control and monitoring, the relay includes 1 Normally Open (1NO) and 1 Normally Closed (1NC) auxiliary contacts. These contacts support overload trip indication, PLC interfacing, alarm signaling, remote monitoring, and control circuit interruption. This integrated functionality simplifies panel design while improving system diagnostics and operational visibility.

The Siemens 3RB3016-1TB0 supports both manual and automatic reset functions, allowing users to select the most suitable recovery method based on their application requirements. This flexibility makes the relay suitable for both automated systems and manually supervised installations.

Built according to IEC 60947-4-1 standards, the relay offers 690V rated insulation voltage, 6kV impulse withstand voltage, IP20 protection, and reliable operation across temperatures from -25°C to +60°C. Its rugged design and proven Siemens engineering make it ideal for manufacturing plants, water treatment facilities, HVAC installations, packaging machinery, and industrial automation projects.

At SBsmart.in, we supply genuine Siemens industrial automation and motor protection products trusted by OEMs, electrical contractors, panel builders, and maintenance professionals across India.