ABB SPAM150C-AA Motor Protection Relay

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Product Overview

The ABB SPAM150C-AA is an intelligent motor protection relay belonging to ABB’s SPAM series. It provides comprehensive protection, supervision, and control for motors in industrial and power systems. Designed for medium- and low-voltage applications, it integrates multiple protection functions including overcurrent, earth fault, unbalance, stall, and thermal overload protection, ensuring safe and efficient motor operation.

Technical Specifications (Typical)

• Model: SPAM150C-AA

• Type: Motor Protection Relay

• Rated Current Input: 1 A or 5 A selectable

• Rated Voltage Input: 100–240 V AC/DC

• Frequency: 50 / 60 Hz

• Operating Voltage Range: 80% – 110% of nominal

• Tripping Time: < 50 ms (typical)

• Communication Interface: RS-485 (Modbus RTU)

• Display: LED indicators / optional LCD screen

• Mounting: Panel or DIN rail mount

• Operating Temperature: –20°C to +70°C

• Weight: Approx. 1.2 kg

Protection Functions

1. Overcurrent protection (long-time, short-time, instantaneous)

2. Earth fault protection

3. Phase sequence and phase unbalance protection

4. Start-time and stall protection

5. Underload / no-load protection

6. Thermal overload (motor thermal model)

7. Negative-sequence and current asymmetry monitoring

8. Remote reset and communication supervision

Features and Advantages

1. High Accuracy Protection: Advanced measurement algorithms for fast and precise tripping.

2. Modular Structure: Flexible input/output expansion for various system configurations.

3. Strong Communication Capability: Built-in RS-485 port with Modbus RTU protocol, easy DCS/SCADA integration.

4. High Reliability: Excellent immunity to electrical noise and industrial interference.

5. User-Friendly Operation: Simple configuration through front panel or communication interface.

6. Comprehensive Protection: Multiple functions in one unit reduce external device requirements and cost.

Application Areas

• Low and medium voltage motor control centers (MCC)

• Power generation plants and substations

• Oil, chemical, mining, and metallurgy industries

• Water treatment and pumping automation systems

• Conveyor, fan, compressor, and cooling system protection

• Industrial process control and automation networks

Precautions

1. Ensure rated current matches the motor circuit specification.

2. Proper grounding is essential for safety and EMC performance.

3. Follow wiring diagrams carefully to avoid connection errors.

4. Operate in a dry, vibration-free, and non-corrosive environment.

5. Periodically inspect terminal tightness and communication integrity.

6. Configure correct baud rate and address when using communication functions.

The structure and details of the product：

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