ABB MS325 Manual Motor Starter

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ABB MS325 Manual Motor Starter 

Product Description

The ABB MS325 Manual Motor Starter is an electromechanical device integrating motor control and protection functions, also known as Motor Protection Circuit Breaker (MPCB) or Manual Motor Protector (MMP). Designed for manual switching of motors, it provides fuse-less protection against short-circuit, overload and phase failure faults.

Technical Specifications

• Model Range: MS325-0.16 to MS325-25 (covering 0.16A-25A rated current)

• Rated Operational Voltage:

  • Main circuit 690V AC

  • Main circuit 440V DC

• Rated Current(Ie): From 0.16A to 25A depending on model

• Short-circuit Breaking Capacity: Up to 100kA @400VAC (model dependent)

• Number of Poles: 3

• Protection Degree: IP20

• Operating Temperature Range: -25°C to +50°C

• Mechanical Endurance: 50,000 operating cycles

• Electrical Endurance: 25,000 operating cycles

• Mounting Dimensions: 54mm width (compact design)

Key Features and Advantages

1. Fuse-less Protection: Saves cost and space, can interrupt circuit within 3ms under short-circuit conditions

2. Multi-protection: Provides short-circuit, overload and phase failure protection

3. Modular Design: Easy connection with ABB contactors and soft-starters to build direct-on-line starters

4. Temperature Compensation: Ensures stable performance under varying ambient temperatures

5. Various Accessories: Including auxiliary contacts, signaling contacts, shunt trips and undervoltage releases

6. Quick Installation: Options of screw terminals or push-in spring terminals

Application Fields

• Industrial Motor Control Centers (MCC)

• Direct-on-line starting protection for pumps, fans and other power equipment

• Distribution systems without backup fuses

• Process industries like food & beverage, pharmaceuticals

• Discrete manufacturing such as machining and automotive

Usage Precautions

1. Installation Environment: Should be installed in environments with pollution degree ≤3, avoiding dust and corrosive gases

2. Wiring Check: Ensure correct main circuit wiring and voltage rating matches the system

3. Current Setting: Properly adjust overload protection setting according to motor rated current

4. Regular Maintenance: Check terminal tightness to prevent loosening caused by vibration

5. Temperature Monitoring: Ensure proper heat dissipation in high temperature environments

6. Qualified Personnel: Installation and maintenance should be performed by qualified electrical personnel

The structure and details of the product：

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