Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |

The ABB 81AA03 (Part Number: GJR2394100R1210) is an advanced motor protection relay designed for use in industrial automation systems. This product is part of ABB’s extensive range of motor protection and control devices. The 81AA03 is engineered to provide both protection and real-time monitoring of motors, ensuring that they operate within their safe limits. By detecting faults such as overcurrent, undercurrent, short circuits, and overheating, this relay helps prevent costly damage to motors and other connected equipment.
The device offers flexible configuration options, making it suitable for a wide range of applications, from simple motor control to complex, multi-motor systems. Its integration into an industrial control system enhances both the reliability and efficiency of motor operation. This makes it ideal for sectors like manufacturing, energy, and automation, where continuous and reliable motor performance is crucial.
The ABB 81AA03 is commonly used in the following applications:
Motor Protection: It provides critical protection for motors by monitoring key parameters such as current, voltage, and temperature. It helps detect abnormal conditions such as overcurrent, undercurrent, and overheating.
Automation Systems: Integrated into automation systems, the device ensures the smooth operation of machinery, helping maintain system reliability and minimizing downtime.
Energy Management: The relay is used in energy management systems to ensure that motors and other electrical equipment operate within optimal conditions, reducing energy wastage.
Process Control: It is widely used in process control applications to maintain the stability and reliability of industrial systems.
Preventive Maintenance: By monitoring key motor parameters, the 81AA03 helps in identifying issues early, enabling proactive maintenance and reducing unexpected equipment failures.
Comprehensive Protection: The ABB 81AA03 provides multi-faceted protection for motors, covering overcurrent, undercurrent, short circuit, and temperature-related issues.
Advanced Monitoring Features: It continuously monitors motor performance, providing valuable feedback to operators, enhancing operational visibility, and ensuring that issues are detected early.
Flexible Configuration: The 81AA03 offers flexible setup options, making it suitable for a variety of industrial systems and motor types.
Compact Design: Despite its advanced capabilities, the ABB 81AA03 has a compact and efficient design, making it easy to install in tight spaces and on DIN rails.
Energy Efficiency: By ensuring that motors operate within safe parameters, the 81AA03 helps optimize energy usage, reducing operational costs and improving energy efficiency.
Durability and Reliability: Built for harsh industrial environments, the 81AA03 is designed to withstand high temperatures and demanding operating conditions, offering long-term reliability.
Brand: ABB
Product Series: 81AA Series (Motor Protection and Control Devices)
Product Line: The 81AA03 is part of ABB’s renowned 81AA Series, which includes advanced motor protection relays and controllers that provide safety, efficiency, and reliability to a wide range of industrial systems.
| Specification | Details |
|---|---|
| Model | ABB 81AA03 (GJR2394100R1210) |
| Type | Motor Protection Relay |
| Nominal Current | 0.3A to 100A |
| Control Voltage | 24V DC / 110V AC |
| Operating Temperature | -20°C to 60°C |
| Dimensions (L x W x H) | 120mm x 90mm x 65mm |
| Weight | 0.6 kg |
| Material | High-grade plastic and metal |
| Mounting Type | DIN Rail Mountable |
| Environmental Protection | IP20 |
| Certifications | CE, UL, RoHS |
| Communication Interface | Modbus RTU, RS485 |
| Model | Description | Nominal Current | Control Voltage | Dimensions (mm) | Weight (kg) | Certifications |
|---|---|---|---|---|---|---|
| ABB 81AA01 | Basic Motor Protection Relay | 0.3A to 50A | 24V DC / 110V AC | 90 x 70 x 45 | 0.35 | CE, UL, RoHS |
| ABB 81AA02 | Advanced Motor Protection with Monitoring | 0.3A to 100A | 24V DC / 110V AC | 110 x 80 x 50 | 0.45 | CE, UL, RoHS |
| ABB 81AA04 | Motor Protection Relay with Enhanced Diagnostics | 0.3A to 100A | 24V DC / 110V AC | 130 x 90 x 60 | 0.6 | CE, UL, RoHS |
| ABB 81AA05 | Modular Motor Protection with Real-Time Diagnostics | 0.3A to 80A | 24V DC / 110V AC | 140 x 100 x 70 | 0.7 | CE, UL, RoHS |
| ABB 81AA06 | Motor Protection with Communication Interface | 0.3A to 80A | 24V DC / 110V AC | 120 x 90 x 65 | 0.65 | CE, UL, RoHS |
| Model | Description | Nominal Current | Control Voltage | Dimensions (mm) | Weight (kg) | Certifications |
|---|---|---|---|---|---|---|
| ABB 5SX21 | Miniature Circuit Breaker | 6A to 25A | 230V AC | 70 x 45 x 80 | 0.2 | CE, RoHS |
| ABB 3BSE041521R1 | Motor Controller with Protection | 1A to 100A | 24V DC / 110V AC | 200 x 120 x 60 | 1.2 | CE, UL |
| ABB ACH550 | Variable Frequency Drive | 0.75 kW to 75 kW | 380V AC | 200 x 180 x 160 | 5.6 | CE, UL, RoHS |
| ABB 81MR5 | Multifunction Motor Protection Relay | 0.3A to 100A | 24V DC / 110V AC | 150 x 110 x 90 | 0.8 | CE, UL, RoHS |
| ABB DS201 | Digital Power Meter | 0.3A to 100A | 24V DC / 110V AC | 120 x 90 x 70 | 0.5 | CE, RoHS |
Q1: What is the primary function of the ABB 81AA03?
A1: The ABB 81AA03 is a motor protection relay that monitors key parameters such as current, voltage, and temperature to protect motors from overcurrent, undercurrent, short circuits, and overheating.
Q2: How does the ABB 81AA03 monitor motor performance?
A2: The 81AA03 continuously monitors the motor’s current, voltage, and temperature, providing real-time diagnostics to detect potential issues before they cause damage.
Q3: What is the operating temperature range for the ABB 81AA03?
A3: The ABB 81AA03 operates within a temperature range of -20°C to 60°C, making it suitable for use in various industrial environments.
Q4: Can the ABB 81AA03 be integrated into existing control systems?
A4: Yes, the 81AA03 can be easily integrated into automation and control systems using communication interfaces such as Modbus RTU and RS485.
Q5: What is the weight of the ABB 81AA03?
A5: The ABB 81AA03 weighs approximately 0.6 kg, which makes it easy to install and integrate into compact spaces.
Q6: How is the ABB 81AA03 mounted?
A6: The ABB 81AA03 is designed for DIN rail mounting, providing a simple and secure installation process for industrial control systems.
Q7: Does the ABB 81AA03 help reduce energy consumption?
A7: Yes, by ensuring motors operate within optimal parameters, the 81AA03 helps optimize energy use, thereby improving energy efficiency and reducing costs.
Q8: Is the ABB 81AA03 easy to configure?
A8: Yes, the device offers flexible configuration options and is designed to be user-friendly, allowing easy adjustments to suit various motor types and system requirements.
Q9: What industries use the ABB 81AA03?
A9: The 81AA03 is used in manufacturing, energy, automation, and process industries to monitor and protect motors and ensure reliable system performance.
Q10: Does the ABB 81AA03 provide real-time diagnostics?
A10: Yes, the ABB 81AA03 offers real-time monitoring and diagnostic feedback, allowing operators to detect issues before they cause motor failure or downtime.