LRD-33 Thermal Overload Relay 17-25A

The GOTOELE LRD-33 Thermal Overload Relay 17-25A is primarily designed for overload and phase loss protection of medium- and low-voltage AC motors. Specifically designed for high-frequency start-stop and continuous operation scenarios, it can operate stably in harsh environments such as manufacturing plants and automated production lines, resisting various interferences and ensuring continuous production. Inheriting the brand's technological expertise, this product outperforms similar products in the industry and is a core protection component for industrial automation.

Core Technical Parameters

- Setting Current Range: 17-25A, suitable for three-phase AC motors of 11kW and below.

- Rated Operating Voltage: Up to 660V AC, suitable for 50/60Hz industrial standard frequency.

- Protection Type: Class 10A tripping rating, with overload, phase loss, and load imbalance protection.

- Auxiliary Contacts: 1 NO + 1 NC, for fault feedback and remote control.

- Reset Method: Manual/automatic dual mode, adaptable to different control logics.

- Installation Method: Snap-on mounting on D-series contactors or independent DIN rail mounting, suitable for various cabinets.

Key Functional Features

1. High Reliability: High-quality thermal bimetallic components + flame-retardant housing, stable operation over a wide temperature range of -25℃ to +60℃, suitable for global industrial environments.

2. Precise Protection: The LRD-33 Thermal Overload Relay 17-25A features built-in differential detection for rapid identification of phase loss and load imbalance; a transparent protective cover prevents accidental operation and supports lead-sealed locking.

3. Modular Expansion: Supports expansion with auxiliary contacts, delay timers, etc., flexibly adapting to the needs of different automation systems.

4. Convenient Maintenance: Equipped with an action indicator window, test and stop buttons, ensuring efficient and convenient maintenance.

Real-World Application Cases

Case 1: Motor Protection in an Automotive Parts Production Line

A stamping production line at an international automotive parts manufacturer's East China factory experienced frequent shutdowns of its approximately 20A motors due to erroneous tripping of the original relay, resulting in daily losses exceeding 20,000 RMB. After replacing the relay with a GOTOELE LRD-33 Thermal Overload Relay 17-25A, adapting to high-frequency start-stop conditions, it achieved 12 consecutive months of zero failures, reducing downtime by 95% and saving over 7 million RMB in costs. It has now been included in the manufacturer's global OEM procurement list.

Case 2: Motor Control for a Logistics Sorting System

A cross-border e-commerce intelligent sorting system required multiple 22A conveyor motors to operate 24/7 within a wide temperature range and support remote fault feedback. After selecting this relay, the system operated without failure for 6 months, achieving a 99.9% stability rate. Installation was convenient and fully met the requirements.

Product Advantages

1. Technological Advantages

GOTOELE has deep expertise in the low-voltage electrical field. Its factory boasts a professional R&D team and advanced equipment. Products integrate core technologies, achieving internationally advanced levels in protection accuracy, response speed, and stability.

2. Quality Advantages

Following the ISO 9001 quality system, the entire process is rigorously controlled. Core components are sourced from international brands, and products undergo multiple stringent tests before leaving the factory, complying with IEC, GB, and other international and domestic standards.

3. Cost-Effectiveness Advantages

High performance and high reliability, priced at least 30% lower than imported products, offering a 24-month warranty and global technical support, making it the preferred choice for "high reliability and low cost."

4. Service Advantages

A global service network provides end-to-end service, including customized support and rapid delivery for OEM projects, with a response time of ≤24 hours.

Packaging and Delivery

The LC1-E4011 18.5KW 30HP AC Contactor uses standard export cartons to effectively prevent damage during transportatio. Bulk orders have a delivery time of 10-15 days. OEM brand customization is also supported; logo printing and customized packaging designs can be provided according to customer needs to meet the brand promotion requirements of different markets, providing efficient and convenient delivery services to global customers.

FAQ

Q1: Can the LRD-33 Thermal Overload Relay 17-25A be used with a 22A three-phase motor? How to set the current?

A1: Fully compatible. The current setting range is 17-25A. Simply open the protective cover and rotate the knob to the 22A mark. It is recommended to set it to 95%-100% of the motor's rated current.

Q2: Does the product support automatic reset? In which scenarios is it suitable?

A2: Supports both manual and automatic reset. Automatic reset is suitable for unattended scenarios, automatically resuming operation after the fault is cleared; manual reset is suitable for equipment requiring manual troubleshooting.

Q3: What are the key differences between the LRD-33 and LRD-33 30-40A, and how to select the appropriate model?

A3: The core difference lies in the setting current range: 17-25A is suitable for motors of 11kW and below, and 30-40A is suitable for motors of 15-18.5kW. Selection should be based primarily on the motor's rated current.

Summary

The GOTOELE LRD-33 Thermal Overload Relay 17-25A, leveraging the brand's technological expertise, precisely adapts to motor protection needs within the 17-25A range, offering high reliability and cost-effectiveness. As a professional low-voltage electrical manufacturer in China, GOTOELE provides high-quality products to global customers through stringent quality control, making it an ideal choice for industrial production and OEM projects.