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ABB MS325-16 Manual Motor Starter  

1. Key Parameters

• Product Model: MS325-16
• Product Series: ABB MS325 Series Manual Motor Starters (Small Motor Control & Protection)
• Core Function: Enables manual on/off control of AC motors; provides thermal overload protection (Class 10) to prevent motor burnout; delivers magnetic short-circuit protection; supports manual reset after tripping; integrates with auxiliary circuits for status feedback
• Electrical & Protection Specifications:

  Parameter	Details	Performance Metrics
  Motor Compatibility	- Motor Type: Single-phase or three-phase AC induction motors

• Rated Current Range: 10A~16A (adjustable via current dial)
• Power Rating: Up to 7.5kW (400V, 3-phase); up to 3kW (230V, single-phase)
• Voltage Rating: 230V~400V AC (50/60Hz) | Adjustable current range suits diverse small motors (e.g., 5.5kW conveyor motor, 2.2kW fan); supports both single/three-phase systems for flexibility |
  | Protection Features | - Overload Protection: Class 10 thermal protection (trips within 10s at 6× rated current)
• Short-Circuit Protection: Magnetic tripping (10×~14× rated current, instantaneous)
• Reset Type: Manual reset (prevents automatic restart after fault)
• Auxiliary Contacts: 1 Normally Open (NO) + 1 Normally Closed (NC) (6A, 250V AC) | Class 10 protection matches standard motor thermal time constants; magnetic short-circuit tripping prevents equipment damage from high-current faults |
• Mechanical & Operational Specifications:

  Parameter	Details	Performance Metrics
  Mechanical Design	- Dimensions: 45mm (W) × 85mm (H) × 65mm (D)

• Mounting Type: 35mm DIN rail (EN 50022)
• Housing Material: Flame-retardant thermoplastic (UL 94 V0)
• Operating Mechanism: Toggle switch (on/off/reset positions)
• Weight: Approximately 120g | Ultra-compact design (45mm width) fits dense control cabinets; DIN rail mounting enables quick installation |
  | Environmental Ratings | - Operating Temperature Range: -25℃~+60℃ (-13℉~140℉)
• Storage Temperature Range: -40℃~+85℃ (-40℉~185℉)
• Humidity Tolerance: 5%~95% RH (non-condensing, 40℃)
• Vibration Resistance: 10~500Hz, 1g acceleration (IEC 60068-2-6)
• Shock Resistance: 20g (11ms half-sine, IEC 60068-2-27)
• EMC Compliance: EN 61000-6-2 (immunity: Level 2) | Wide temperature range suits indoor industrial/commercial environments; vibration tolerance prevents accidental tripping in machinery-heavy areas |
• Compliance Standards: CE, UL 508, CSA C22.2 No.14, IEC 60947-4-1, RoHS |

2. Core Features

• All-in-One Design: Combines manual control, Class 10 overload protection, and magnetic short-circuit protection—eliminates the need for separate contactors, overload relays, and circuit breakers, reducing system complexity and cost by 30% for small motor applications.
• Adjustable Current Range: 10A~16A dial-adjustable rated current—accommodates multiple motor sizes (e.g., 10A for 4kW motors, 16A for 7.5kW motors), simplifying inventory management for facilities with diverse small machinery.
• Manual Reset Function: Requires manual intervention after tripping—prevents automatic restart of motors after faults (e.g., jams, overloads), enhancing operator safety and avoiding unexpected equipment activation.
• Built-In Auxiliary Contacts: 1NO+1NC contacts (6A, 250V AC)—enable status feedback (e.g., "motor running" LEDs) or interlock control (e.g., stopping a conveyor if a gate is open) without additional modules.
• Ultra-Compact Size: 45mm width—fits in space-constrained control cabinets (e.g., commercial HVAC panels, small machine enclosures) and allows dense mounting of multiple starters on a single DIN rail.
• Flame-Retardant & Durable Housing: UL 94 V0 thermoplastic—meets fire safety standards for electrical enclosures; -25℃~+60℃ operating range ensures reliability in unconditioned spaces (e.g., garage workshops, warehouse utility rooms).
• Simple Installation: DIN rail mounting and tool-less wiring terminals—enables fast setup (5 minutes per unit) by electricians, reducing installation time for small motor systems (e.g., retail store HVAC fans).

3. Application Fields

• Commercial & Building Automation: Small motor control:
  • HVAC Systems: Controls small fan motors (e.g., 2.2kW rooftop exhaust fans) and pump motors (e.g., 1.5kW boiler feed pumps)—adjustable current range fits diverse motor sizes; manual reset prevents fan restart after power outages.
  • Retail & Office Equipment: Manages small machinery (e.g., 1kW office air purifiers, 3kW retail display coolers)—compact size fits under-counter control panels; auxiliary contacts trigger "equipment on" indicators.
• Manufacturing Auxiliaries: Auxiliary machinery control:
  • Small Conveyors: Controls 4kW~7.5kW conveyor motors in assembly lines—Class 10 overload protection prevents burnout from product jams; magnetic tripping handles short circuits from damaged cables.
  • Packaging Auxiliaries: Manages 2kW~5.5kW film unwind motors and label applicators—DIN rail mounting allows grouping with other controls (e.g., sensors, timers) in packaging machine cabinets.
• Food & Beverage Small Lines: Light-duty processing equipment:
  • Cafeteria Equipment: Controls 1.5kW~3kW motors for coffee machines, mixers, and small refrigerators—flame-retardant housing meets commercial kitchen safety standards; manual reset avoids accidental restart after cleaning.
  • Bakery Auxiliaries: Manages 3kW~5.5kW dough mixer motors and small oven fans—wide temperature range tolerates warm bakery environments; auxiliary contacts integrate with door interlocks (e.g., stopping mixer if safety guard is open).
• Agriculture & Small Farms: Farm equipment control:
  • Irrigation Pumps: Controls 5.5kW~7.5kW small irrigation pump motors—adjustable current range fits different pump sizes; vibration tolerance withstands outdoor pump shed conditions.
  • Grain Handling Auxiliaries: Manages 3kW~5.5kW grain auger motors—manual reset prevents auger restart after jamming; compact size fits farm utility control panels.

4. Precautions

• Motor Compatibility (Critical): Ensure motor power/current matches the starter’s range (10A~16A, up to 7.5kW/400V)—overloading causes frequent tripping or starter damage; use ABB’s motor-starter sizing tool to verify compatibility. Do not use for DC motors (AC-only design).
• Installation & Wiring Safety:
  • Current Setting: Adjust the current dial to match the motor’s rated current (not full load current)—incorrect settings cause under-protection (dial too high) or nuisance tripping (dial too low); refer to the motor nameplate for rated current.
  • Wiring Terminals: Torque power terminals to 1.5Nm (M4 screws) and control terminals to 0.8Nm (M3 screws)—loose connections cause overheating; use copper conductors (1.5mm²~4mm²) for power wiring.
  • Grounding: Connect the starter’s PE terminal to a dedicated protective ground (resistance ≤1Ω)—ungrounded installations increase shock risk; do not share ground with non-motor equipment.
• Operation & Maintenance:
  • Reset Procedure: After tripping, identify and resolve the fault (e.g., motor jam, overload) before resetting—resetting without fixing the fault damages the motor or starter; allow the starter to cool for 5 minutes after thermal tripping.
  •  

The structure and details of the product：

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