ABB SAFT136CTS CTU Overload Control Board

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1. Product Overview

The ABB SAFT136CTS CTU Overload Control Board is a protection and control module used in ABB drive systems. It monitors motor current and triggers protection or alarm signals when overload or abnormal conditions occur, ensuring safe operation of the motor and drive system.
The CTU Overload Control Board is widely applied in industrial automation, metallurgy, mining, power, and machining industries, playing a critical role in system safety and reliability.

2. Main Technical Specifications (Typical)

• Model: SAFT136CTS

• Product Type: CTU Overload Control Board

• Applicable Systems: ABB low-voltage and medium/high-power drives

• Input Signal: From current transformers (CTs)

• Output Signal: Relay / dry contact for triggering protection or alarm

• Overload Action Characteristics:

  • Adjustable overload threshold

  • Delay action functionality

• Response Time: Fast response <100 ms

• Operating Voltage: Supplied by drive system, typically DC 24V

• Mounting: Plug-in board or integrated in control cabinet

• Operating Environment: -25 ℃ to +60 ℃, industrial conditions

• System Compatibility: Fully compatible with ABB drive modules, control units, and protection units

3. Key Advantages and Features

1. Reliable Overload Protection

   • Real-time monitoring of motor current

   • Triggers breaker or alarm under overload conditions

2. Adjustable Protection Parameters

   • Set overload threshold and delay according to system needs

   • Adaptable to various industrial equipment

3. High-Speed Response

   • Response time <100 ms for rapid motor and drive protection

4. Modular Design

   • Plug-in board for easy replacement and maintenance

   • Reduces downtime and maintenance costs

5. Wide Compatibility

   • Suitable for multiple ABB drive systems and CT inputs

   • Seamless integration with original protection units

4. Typical Applications

• ABB industrial inverters and drive systems

• Motor drive and speed regulation systems

• Metallurgy, mining, and power industry equipment

• Conveyors, compressors, pumps, and fan control systems

• Automated production lines and assembly equipment

5. Installation and Maintenance Notes

1. Verify CT Input Compatibility

   • Ensure current transformer rating matches control board input

2. Power-Off Installation

   • Disconnect system power before installing or removing the board

3. ESD Protection

   • Use anti-static precautions when handling the board

4. Proper Wiring

   • Secure signal wiring connections

   • Avoid running signal cables parallel to high-voltage lines

5. Environmental Conditions

   • Avoid high temperature, humidity, and corrosive environments

   • Ensure proper ventilation in the control cabinet

6. Periodic Inspection

   • Check protection actions and relay status regularly

   • Ensure overload control board operates correctly