Microprocessor based overload relay - 3RB (Class 10E) - 3RB3036-1UB0

Product Description

Siemens 3RB3036-1UB0 Electronic Overload Relay – Intelligent Class 10E Motor Protection for Industrial Applications

The Siemens 3RB3036-1UB0 Electronic Overload Relay is a high-performance microprocessor-based motor protection device designed to provide accurate and dependable protection for three-phase motors operating in industrial and automation environments. As a member of the renowned Siemens SIRIUS 3RB3 Series, this advanced electronic overload relay delivers reliable protection against overload conditions, phase failure, and phase imbalance while ensuring long-term motor reliability and operational efficiency.

Engineered with a 12.5A to 50A adjustable current range, the Siemens 3RB3036-1UB0 is ideal for protecting industrial motors used in pumps, compressors, fans, conveyors, HVAC systems, packaging equipment, material handling machinery, and process automation applications. Featuring a Class 10E tripping characteristic, the relay is specifically optimized for motors with normal starting conditions, providing the perfect balance between startup flexibility and rapid fault response.

Unlike conventional thermal overload relays that rely on bimetal technology, the 3RB3036-1UB0 Electronic Overload Relay utilizes advanced electronic current sensing and microprocessor-controlled evaluation. This intelligent technology continuously monitors motor operating conditions and calculates motor thermal behavior with high precision. By detecting overload conditions before excessive heat can damage motor windings, bearings, or insulation systems, the relay helps prevent costly failures and unplanned downtime. Electronic overload relays also offer significantly better repeatability and protection accuracy compared to traditional thermal protection devices.

One of the major advantages of the Siemens 3RB3036-1UB0 is its Class 10E overload protection characteristic. This protection class is specifically designed for standard-duty motors that require normal acceleration times during startup. Class 10E protection provides effective thermal motor protection while minimizing nuisance trips, making it ideal for industrial processes that depend on reliable motor operation. Applications such as pumps, fans, compressors, conveyors, and production equipment benefit significantly from this protection profile.

The relay incorporates advanced phase failure and phase imbalance detection, helping prevent one of the most common causes of motor damage. If one phase is lost or becomes significantly unbalanced, the relay quickly identifies the abnormal condition and disconnects the motor before overheating occurs. This feature protects valuable equipment, reduces maintenance costs, and helps maintain production continuity. Siemens SIRIUS electronic overload relays are specifically engineered to protect motors against overload, phase unbalance, and phase failure conditions.

The Siemens 3RB3036-1UB0 Motor Protection Relay features a compact S2 frame size and is designed for direct mounting onto Siemens SIRIUS contactors. This compact construction allows panel builders and OEMs to create space-efficient motor starter assemblies while simplifying installation and maintenance procedures. The relay utilizes robust screw terminal connections for both the main circuit and auxiliary circuit, ensuring secure electrical connections and long-term reliability in demanding industrial environments.

For enhanced automation and monitoring capabilities, the relay is equipped with 1 Normally Open (1NO) and 1 Normally Closed (1NC) auxiliary contacts. These contacts can be used for overload trip indication, PLC monitoring, alarm signaling, control circuit interruption, and fault diagnostics. The integrated contact arrangement simplifies panel wiring while improving system visibility and troubleshooting efficiency. Similar Siemens SIRIUS 3RB relays provide integrated auxiliary contacts for industrial control applications.

The relay supports both manual and automatic reset functions, allowing users to choose the most appropriate recovery method for their application. This flexibility makes the 3RB3036-1UB0 suitable for both manually supervised installations and highly automated production environments where rapid restart capability is essential.

Built according to Siemens' rigorous industrial quality standards, the Siemens 3RB3036-1UB0 Electronic Overload Relay offers dependable operation across a wide temperature range and delivers consistent protection performance throughout its service life. Its rugged design and intelligent protection technology make it an excellent choice for manufacturing plants, water treatment facilities, food processing industries, infrastructure projects, and industrial automation systems.

At SBsmart.in, we provide genuine Siemens industrial automation and motor protection products trusted by OEMs, panel builders, electrical contractors, and maintenance professionals across India. When you choose the Siemens 3RB3036-1UB0, you receive an authentic Siemens SIRIUS motor protection solution engineered for superior reliability, enhanced equipment safety, and long-term industrial performance.