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ABB S2C-CM2/3 2CSS203997R0013 Motor Protection Unit

1. Product Title

ABB S2C-CM2/3 2CSS203997R0013 Motor Protection Unit (Dedicated for Low-Voltage Motor Overload & Phase Failure Protection)

2. Product Data

ABB S2C-CM2/3 2CSS203997R0013 is a dedicated protection unit for low-voltage motors, compatible with motors with a rated current of 0.1~32A. It integrates protection functions for overload, phase failure, locked rotor, and current unbalance, supports fault signal output, and can be interlocked with circuit breakers and contactors. This ensures the safe operation of motors under industrial working conditions, making it widely applicable in motor control circuits across manufacturing, construction, and other fields.

3. Product Description

It adopts a modular design and can be directly installed at the front of S2C series circuit breakers to achieve integrated "protection + control". It supports manual/automatic reset, adapting to different fault handling scenarios, and is equipped with LED fault indicators for quick identification of fault types such as overload and phase failure. With an operating voltage range of 230/400V AC, it is suitable for low-voltage power distribution systems. Protection parameters can be easily set via knobs without complex programming, enabling high efficiency in installation and commissioning. It effectively extends motor service life and reduces equipment downtime losses.

4. Detailed Parameters

Parameter Category	English Parameters
Rated Current Range	0.1~32A
Protection Functions	Overload, Phase Failure, Locked Rotor, Current Unbalance
Operating Voltage	230/400V AC (50/60Hz)
Reset Mode	Manual Reset, Automatic Reset (Optional)
Fault Output	1 NC (Normally Closed) Contact (AC 250V/5A)
Operating Temperature	-25℃~+60℃
Protection Class	IP20 (Body)
Compatible Circuit Breaker	ABB S2C Series Miniature Circuit Breakers
Installation Method	DIN Rail Mounting (35mm Standard DIN Rail)

5. Advantages & Features

① Multi-Function Protection: Covers common motor fault types, providing comprehensive protection; ② Easy Integration: Modular design enables direct compatibility with S2C series circuit breakers, no additional brackets required; ③ Convenient Operation: Parameter setting via knobs and fault display via LEDs simplify commissioning and maintenance; ④ Wide Compatibility: 0.1~32A current range works with multiple specifications of low-voltage motors; ⑤ High Reliability: Wide temperature operation range plus IP20 protection adapts to complex industrial environments.

6. Application Fields

① Manufacturing: Protection for production line conveyor motors, fan motors, and water pump motors; ② Construction Industry: Protection for HVAC system motors and fire pump motors; ③ Water Treatment: Protection for sewage lift pumps and agitator motors; ④ Light Industry: Protection for motor control circuits in textile and printing equipment; ⑤ Warehousing & Logistics: Safety protection for conveyor and stacker motors.

7. Precautions

① Before installation, confirm that the motor’s rated current matches the current range of the protection unit; ② Distinguish between power terminals and signal terminals during wiring to prevent component burnout due to reverse connection; ③ When the automatic reset function is enabled, set a reasonable reset delay (to avoid frequent motor startup); ④ Avoid installation near strong electromagnetic interference sources (e.g., frequency converters) to prevent false operation; ⑤ Regularly check the connection status of contacts to prevent protection failure caused by looseness

The structure and details of the product：

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ABB S2C-CM2/3 2CSS203997R0013 motor protection unit