FXR Series Thermal Overload Relay
Key Features
- Reliable motor overload protection
- Current ratings: 0.1A to 300A
- Adjustable tripping current setting
- Manual and automatic reset options
- Ambient temperature compensation
- Phase failure protection
- Compact modular design
- Direct mounting on contactors
- DIN rail mounting capability
- IEC 60947-4-1 compliant
The FXR Series Thermal Overload Relay is designed to provide reliable protection for electric motors against overload conditions. With a wide current rating range from 0.1A to 300A, the FXR series offers versatile protection solutions for various motor applications. The relay features an adjustable tripping current setting, allowing precise configuration based on motor specifications. The ambient temperature compensation ensures consistent operation across different environmental conditions, while the phase failure protection provides additional safety for three-phase motors. The FXR series is designed for direct mounting on FX series contactors, creating compact and efficient motor starter combinations. With manual and automatic reset options, flexible control and operation are achieved for different application requirements. Compliant with IEC 60947-4-1 standards, the FXR series thermal overload relay delivers reliable and proven protection for industrial motor applications.
Product Overview
The FXR Series Thermal Overload Relay is an essential component for motor protection systems, designed to prevent damage to electric motors caused by overload conditions. By monitoring the motor current and disconnecting the circuit when the current exceeds the preset threshold for an extended period, the relay protects the motor windings from overheating and potential burnout. The wide current rating range from 0.1A to 300A makes the FXR series suitable for applications ranging from small control motors to large industrial motors.
The FXR series features a bimetallic strip mechanism that responds to current heating, providing accurate and reliable trip characteristics. The ambient temperature compensation ensures that the trip characteristics remain stable across different operating temperatures, eliminating the need for constant readjustment. Phase failure protection detects loss of one or more phases in three-phase systems, providing additional protection for motors. The relay can be mounted directly on FX series contactors, creating a compact motor starter assembly that saves panel space and simplifies wiring.
Current Ratings & Models
Model Series
| Model | Current Range | Compatible Contactor |
|---|---|---|
| FXR-5 | 0.1A – 5A | FX-6 |
| FXR-10 | 4A – 10A | FX-11, FX-16 |
| FXR-25 | 9A – 25A | FX-18, FX-23, FX-32 |
| FXR-40 | 18A – 40A | FX-38, FX-50R |
| FXR-80 | 38A – 80A | FX-65R, FX-80, FX-90 |
| FXR-150 | 65A – 150A | FX-100R, FX-125R |
| FXR-300 | 125A – 300A | FX-180, FX-220, FX-300 |
Technical Specifications
| Parameter | Specification |
|---|---|
| Standard | IEC 60947-4-1, IEC 60947-5-1 |
| Pollution Degree | Pollution Degree 3 |
| Overvoltage Category | III |
| Rated Insulation Voltage (Ui) | 690V AC |
| Rated Operational Voltage (Ue) | 690V AC |
| Current Setting Range | 0.1A – 300A (depending on model) |
| Adjustment Accuracy | ±5% |
| Thermal Memory | Yes |
| Reset Mode | Manual / Automatic |
| Ambient Temperature Compensation | -5°C to +55°C |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +80°C |
| Mounting | Direct mounting on contactors / 35mm DIN rail |
| Degree of Protection | IP20 |
| Terminal Type | Cage clamp / Screw terminal |
| Conductor Cross Section (max) | 35 mm² |
| Auxiliary Contact | 1 NO + 1 NC (optional) |
| Contact Capacity | AC-15: 230V / 1A |
Trip Characteristics
| Type of Current | Current Ratio (Ir) | Trip Time |
|---|---|---|
| Cold Start | 1.05 × Ir | No trip within 2 hours |
| Cold Start | 1.20 × Ir | < 2 hours |
| Hot Start | 1.50 × Ir | < 2 minutes |
| Hot Start | 7.2 × Ir | 2-10 seconds |
| Phase Failure | 2-phase load | Trips according to Class 10A |
Applications
Motor Starters
Protection for direct-on-line starters, star-delta starters, and other motor control circuits
Pumps & Fans
Overload protection for pumps, fans, blowers, and other rotating equipment
Conveyors
Protection for conveyor belts, material handling systems, and transport equipment
Compressors
Overload protection for air compressors, refrigeration systems, and HVAC equipment
Quick Specifications
- Series: FXR
- Type: Thermal Overload
- Current: 0.1A – 300A
- Voltage: 690V AC
- Standard: IEC 60947-4-1
- Reset: Manual/Auto
- Mounting: Contactor/DIN
Reset Options
- • Manual Reset
- • Automatic Reset
- • Manual/Auto Selector
Protection Features
- • Overload Protection
- • Phase Failure Protection
- • Phase Imbalance Protection
- • Temperature Compensation
Compatible Contactors
- • FX-6 to FX-300 Series
- • FXR Series
- • FXC Series
Certifications
Contactors and motor-starters
European Conformity
Underwriters Laboratories
Contact Information
Hangzhou Weltrus New Energy Technology Co., Ltd.
Block D, Ocean International Center
333 Yuanjian Street, Hangzhou
Zhejiang, China
Tel/WhatsApp: +86 13735502672
Email: [email protected]
Contact UsCONTACT
+86-13735502672
Adhering to the development philosophy of market-oriented, customer-centric, and supply based, we continuously promote technological innovation and product upgrades, and provide global users with higher quality, efficient, and environmentally friendly clean energy solutions.