ABB MNS iS Motor Control Center System

ABB MNS iS Motor Control Center System

Product positioning: MNS iS is an intelligent motor control center upgraded based on MNS series technology, integrating protection, control, and monitoring functions, suitable for industrial production lines, energy facilities, and other scenarios. Through modular design, it achieves efficient operation and maintenance as well as full lifecycle cost optimization.

Core characteristics and values of the system

1. Core advantages

High safety: The power and control areas are physically isolated, complying with the IEC 61439 series standards, supporting arc fault protection (up to 100 kA/300 ms), ensuring the safety of personnel and equipment.

Standardization and flexibility: The fully pre installed power module (MStart) supports multiple starter types (direct start, star delta start, etc.), and the control module (MControl) can expand its functionality through software configuration without the need for additional hardware.

Low lifecycle cost: Reduce downtime through predictive maintenance (condition monitoring), standardize modules to lower inventory requirements, and simplify troubleshooting processes.

Intelligent information management: integrates web servers with industrial communication protocols (Profibus, Profinet, etc.), supports remote monitoring and data analysis, and achieves digital operation and maintenance.

2. Innovative design

Functional module separation: The power module (MStart) and control module (MControl) operate independently, supporting live module replacement and improving system availability.

Transformer free sensing technology: high-precision shunt sensors are used to measure current, voltage, and temperature, replacing traditional transformers and reducing energy consumption and space occupation.

Plug and play architecture: modules automatically identify location and type, communication networks automatically configure, reducing engineering complexity.

System Architecture and Components

1. Hardware composition

Power module (MStart):

Includes isolators, short-circuit protection devices (fuses or circuit breakers), contactors, and sensor modules.

Supports drawer style (6E/4 to 24E sizes) and fixed style (suitable for motors ≥ 250 kW) installation, compatible with voltage levels of 400 V, 500 V, and 690 V.

Control module (MControl):

The core controller is responsible for protecting algorithms (overload, phase loss, ground fault, etc.), logic control, and data acquisition.

Support the expansion of I/O interfaces (digital, analog, PTC/PT100 temperature input) to meet different on-site signal requirements.

Communication and Interface Module:

MLink: As a gateway connecting upper level systems, it supports protocols such as Profibus DP, Profinet, Modbus, and has a built-in web server.

MView: Local Human Machine Interface (HMI), supports touch operation and status monitoring, and can be accessed remotely through the network.

2. Structural design

Partition separation: Vertical and horizontal partitions strictly distinguish equipment areas, control cable areas, power cable areas, and busbar areas to avoid electromagnetic interference, and support different key lock control access permissions.

Busbar system: The main busbar is located at the rear of the cabinet and adopts a maintenance free design (copper material, optional silver plating or insulation sleeve). It is safely isolated from the equipment area through a multifunctional isolation wall (MFW).

Cable management: Power and control cable partition wiring, supporting up and down incoming lines, suitable for different installation scenarios.

Control and protection functions

1. Protection function module

Thermal Overload Protection (TOL): Based on the IEC 60947-4-1 standard, it calculates the motor's thermal capacity, provides "trip time" and "reset time" warnings, and supports ATEX certification scenarios.

Motor abnormal protection: monitors phase loss, current imbalance, undervoltage, grounding faults, etc., and can be configured with alarm or trip actions.

Process monitoring and protection: including blockage, underload, no-load, and limit of starting times, to prevent mechanical failures (such as pump cavitation).

2. Maintenance and status monitoring

Predictive maintenance: Monitor parameters such as the number of contactor actions, module insertion times, operating hours, and contact temperature, and trigger an alarm when the threshold is exceeded.

System self diagnosis: Automatically verify module type and position matching, communication status, and control voltage to ensure system integrity.

Communication and Integration

Communication architecture and core components

1. Communication nodes and hierarchy

The communication system of MNS iS adopts a distributed architecture and is divided into three levels of nodes:

On site level: With MControl as the core, responsible for the protection, control, and data acquisition of a single motor, communicating with the power module (MStart) through an internal bus.

Network level: Multi node aggregation is achieved through MLink gateway, supporting interaction with upper level systems, and can connect up to 60 MControl modules.