RDJ2 Series Thermal Relays: Overload and Phase-break Protection for AC Motors

In industrial automation scenarios, AC motors are the core of power. Issues such as overload, phase break, and three-phase imbalance can easily lead to motor burnout, equipment shutdown, and production interruption. PEOPLE Electric's RDJ2 series bimetallic thermal overload relays, specifically designed for the safety of AC motor circuits, focus on achieving precise overload and phase-break protection. They are widely applicable to various industrial control scenarios and serve as a reliable guarantee for the stable operation of motors. For product details, please refer to the official page: https://www.people-electric.com/thermal-relay-industrial-control/

I. Precise and Reliable Core Protection, Addressing Key Motor Operation Pain Points

The RDJ2 series is suitable for power distribution and control circuits withAC 50/60Hz, rated operating voltage up to 660V, and rated current of 0.10～630A. Based on the bimetallic thermal effect principle, it provides comprehensive protection for motors:

● Overload Protection: Real-time current monitoring to avoid insulation aging and winding burnout caused by long-term operation of the motor beyond the rated capacity;

● Phase-break Protection: Rapid response to three-phase phase-loss faults to prevent motor damage caused by sudden current rise in the remaining two phases;

Abnormal Working Condition Protection: It also provides safety protection for scenarios such as excessive motor starting time and stalling, comprehensively reducing the risk of equipment failure.

II. Humanized Functional Design, Balancing Safety and Maintenance Convenience

In addition to performance, this series is more in line with the needs of industrial on-site use, with a number of practical configurations:

● Temperature Compensation: Ensures stable protection accuracy under different ambient temperatures, not affected by on-site temperature differences;

● Reset Mode: Supports free switching between auto-reset and manual reset, adapting to different maintenance processes;

● Operational Safety: Equipped with test/stop buttons to check the flexibility of actions; with anti-electric shock protective cover and anti-misoperation locking device, making on-site use safer;

● Signal and Adjustment: Equipped with action indication and adjustable setting current functions, with insulated separation of auxiliary contacts, adapting to diverse control logics.

III. High Adaptability and Standardization, Compatible with Diverse Industrial Control Scenarios

The RDJ2 series strictly complies with the IEC60947-4-1 and GB/T14048.4 standards, with stable performance and reliable quality:

● Flexible Installation: Compact size and diverse installation methods, can be combined with contactors to form electromagnetic starters for immediate use;

● Strong Versatility: Consistent performance with the LR2 series, can be directly replaced, reducing on-site replacement costs;

● Wide Application Scenarios: Suitable for motor protection scenarios such as machine tools, fans, water pumps, conveyors, and production lines, covering most industrial control needs.

PEOPLE Electric's RDJ2 series thermal relays, with professional protection, stable performance and high adaptability, provide continuous and reliable overload and phase-break protection for AC motors in global industry, helping industrial control systems operate safely and efficiently.