Overview
The LS MMS-32S manual motor starter is a three-pole motor protection device engineered for industrial automation and machine control applications. This unit is suitable for switching and protecting three-phase induction motors of up to 45kW at 400VAC and for loads with rated currents of up to 100A. Featuring rated operational current of 63A and rated insulation voltage of 690V, the MMS-32S delivers dependable motor protection in a compact footprint.
Key Features
- Three-position operator handle: ON-OFF-TRIP positions for intuitive motor control and emergency shutdown
- Adjustable inverse bimetal thermal release: Protects motors against overloads and ensures effective protection even in the case of single-phasing
- Overload and phase-failure protection: Built-in protection for circuits and motor starter functions with wide range of ambient temperature compensation
- Compact mounting: 45mm width for 32A models, DIN rail and screw mounting options, handle lock in OFF position
- Class 10/20 trip characteristics: Trip test available with finger-safe terminals
- Accessory compatibility: Supports optional auxiliary contact blocks, shunt release, and alarm switch modules
Technical Specifications
- Manufacturer: LS Electric (Meta-MEC/Metasol series)
- Model: MMS-32S
- Poles: 3P (Three-phase)
- Rated Operational Current (Ie): 63A
- Rated Insulation Voltage (Ui): 690V
- Degree of Protection: IP20 per IEC 60529
- Breaking Capacity (Icu): Up to 100kA
- Terminal Torque: 1.7 N.m on screw clamp terminals
- Thermal Setting Range: Multiple settings available (0.16–40A depending on frame size)
- Operating Temperature: Adjustable ambient temperature compensation
- Mounting: DIN rail and screw mounting
- Standards Compliance: IEC 60947 international standard
Typical Applications
- Machine tool controls and spindle motor protection
- Pump and fan motor starter panels
- Group installation motor protection (multi-motor circuits)
- Industrial process automation with three-phase loads
- Building HVAC and utility motor control systems
- Manufacturing and packaging equipment motor circuits
Compatibility & Replacements
Compatible With
- Motor types: Three-phase induction motors up to 45 kW at 400 VAC
- Control panels: Industrial control cabinets with DIN rail or screw-mounted bus systems
- Auxiliary systems: Optional LX (side-mounted), LA, and LAM (alarm switches); RU/RUX (undervoltage releases); RS (shunt releases)
- Phase-bus devices: Type PB-322, PB-323, PB-324, PB-325 compatible
- Circuit protection: Integrates with overload and short-circuit protection schemes per UL Type E combination motor controller standards
Replaces / Drop-In Replacement For
- MMS-32H: Standard heavy-duty variant (same frame, different thermal settings)
- MMS-32HI: Heavy-duty variant with instantaneous trip function
- Direct form-fit replacements available within the MMS-32 series; verify thermal setting range for your motor before ordering
Works With
- Auxiliary contact blocks: FX (front-mounted), LX (side-mounted) for additional control circuits
- Communication/integration: Standalone manual control; integrates into larger PLC and industrial control networks via auxiliary contacts
- Motor protection standards: Compliant with IEC 60947 and UL industrial control panel standards
- Thermal compensation: Compatible with wide ambient temperature environments through adjustable bimetal characteristics
