Category: ABB

System highlights

• Functional areas are separated from each other

in accordance with IEC 61439 series.

• Power cables are fully separated from the control

and communication cables, thus avoiding

electromagnetic interferences.

• Different access rights to cable compartments

can be granted using different key locks.

The basic elements of the MNS iS frame

construction are “C” shaped steel profiles with

a 25 mm hole pitch according to DIN 43660.

This 25 mm equals the dimension of 1E used

in MNS to define the area usage within

the switchgear.

Each cubicle is precision constructed by bolting

horizontal and vertical profiles together, to form

a rigid modular structure. The assembly is

maintenance free as a result of the construction

method utilizing a combination of thread locking

ESLOK screws with bolted pressure plates and

thread forming screws.

The profiles are galvanic protected (Zn or AL/Zn)

against corrosion.

As a standard, power cabling and control wiring

are strictly separated within MNS iS. The

switchboard is structured as follows:

1 Equipment compartment

All equipment, including the standard motor

starter modules (MStart) in withdrawable

design, is situated therein. The compartment

can be divided in horizontal and vertical

sub-compartments.

2 Control cable compartment

Contains the motor control devices

(MControl), control cables and terminals.

3 Power cable compartment

Contains power cables and connection units.

4 Busbar compartment

Contains the MNS main busbar system and

distribution bars. The distribution bars are

embedded in the multifunction separation

wall (MFW) which is located between the

equipment compartment and the busbar

compartment.

System highlights

• Functional areas are separated from each other

in accordance with IEC 61439 series.

• Power cables are fully separated from the control

and communication cables, thus avoiding

electromagnetic interferences.

• Different access rights to cable compartments

can be granted using different key locks.

The basic elements of the MNS iS frame

construction are “C” shaped steel profiles with

a 25 mm hole pitch according to DIN 43660.

This 25 mm equals the dimension of 1E used

in MNS to define the area usage within

the switchgear.

Each cubicle is precision constructed by bolting

horizontal and vertical profiles together, to form

a rigid modular structure. The assembly is

maintenance free as a result of the construction

method utilizing a combination of thread locking

ESLOK screws with bolted pressure plates and

thread forming screws.

The profiles are galvanic protected (Zn or AL/Zn)

against corrosion.

Switchboard construction

MNS iS as part of the ABB low voltage switchgear

solution uses the well proven ABB MNS standard

design aspects. MNS aspects described in this

section are fully applicable to MNS iS.

MNS system is a verified low voltage switchgear

design in accordance with IEC 61439 series and IEC 61641.

The consistent application of the modular

principle both in electrical and mechanical design

as well as the use of standardized components

allows its flexible and compact design.

Depending on operating and environmental

conditions different design levels are offered.

Notable system advantages with regard to

design aspects:

• Optimum personal protection

• Design verified by testing

• Arc fault containment acc. criteria 1-7

• High operational reliability and availability

• Earthquake-, vibration- and shock-proof

designs are available

• Maintenance-free busbar construction

• Simple retrofitting procedures

• Compact, space-saving design

• Easy project and detail engineering through

standardised components

The switchboard is divided into vertical and

horizontal compartments thus separating

different functional areas.

Components overview

The power module MStart/MFeed comprises:

• The electrical isolator.

• The short circuit protection device (fuses or

circuit breaker).

• Contactor and any electrical control equipment

and status indication.

• The sensor module (measuring the electrical

values, which are then available to the process

via the MControl module).

The integrated motor controller module MControl

(located in the control compartment) comprises:

• The processor performing all the protection,

control functions and monitoring functions. It

exchanges information with the MStart/MFeed

via an internal bus.

• I/O interface modules providing an interface to

external components for control, protection

and indication.

Maintenance functions are an integral part of

the system. Asset monitors measuring system

performance data (e.g. outgoing line

temperature, number of insertions) allow

scheduling of maintenance activities only if

they are really required.

The flexibility of the system allows modifications

by a simple “plug and produce” concept.

Exchanging the modules or changing the

parameter settings is easily achieved by using

system inherent functions and tools.

The interface module MLink serves as the

gateway to higher level systems which

communicate via the internal bus to

all MControl modules.

A local human system interface MView is available

to monitor the MNS iS status and display

information on each connected motor/feeder.

MNS iS system overview

Function module concept

MNS iS motor control center solution delivers

all the functions for control, protection and

monitoring of the motors and motor starters

using software and hardware modules for the

specific tasks. Right information is provided to

the right people at the right time.

Hardware modules are designed to fulfill desired

tasks (power module containing electrical parts

e.g. to isolate power, control module containing

software applications etc. to control a motor).

System functions are provided as functional

modules to be downloaded to the control module.

Only required functions are downloaded while

others are available as options.

System functionality may be enhanced at any

time without the requirement for additional

hardware or wiring.

Time synchronization with a time server in the

plant or locally in the switchboard allows accurate

time stamps of alarms and events collected in the

control module.

Module and location supervision are available

as a standard. These functions ensure the

corresponding power and control modules are

installed to the correct location for the particular

motor/feeder application.

Measurement variables

Selectable temperature, current and voltage

measurement for various protection needs

for both motor and the switchgear itself.

No traditional transformers are utilized

for any measurements.

Information distribution as required

Industry standard communication interfaces,

such as Profibus DP, ProfiNet, Modbus RTU,

Modbus TCP and OPC are available, enabling site

wide distribution of information (operator,

maintenance, management).

System accessibility with ‘off the shelf’

web browser based devices

With an inbuilt web server functionality, the user

can select any web browser based device to

interrogate the system.

Standard power modules

Fully assembled, ready to use and offered for

a wide range of motor starter and energy

distribution modules.

Flexible control modules

Scalable for basic to complex motor starter types,

protection functions and field input/output

signal requirements.

Integrated control schematics

All starter level interlocking scheme between

control and power module is built in.

No hardwiring or input/output assignment

required. The control schematic is reduced to

assigning field I/O signal contacts only.

User friendliness

Self supervision of module location, module type,

power rating and automatic installation onto the

communication network.

User friendliness

MNS iS provides integrated user tasks, like

module supervision, lifecycle management,

contact temperature supervision and

power loss supervision.

Less engineering complexity

MNS iS is the easiest way to plan, engineer and

manage a low voltage switchgear system.

Project implementation

MNS iS helps you to reduce your project costs by

offering a shorter project duration due to high

standardization and reduced engineering.

MNS iS retains the best of MNS technology and

evolves it into the next level of operational

handling benefits for customers’ low voltage

motor control center applications.

The distinct elements in MNS iS are:

Power and control part operational safety

Physically separated and independent

operational handling of power and

control parts.

MNS iS system overview

MNS iS – Value inside

High protection and safety

MNS iS and its clear segregation of power and

control compartments offers highest personal,

system and supervision safety possibilities.

Standardization

Maximum simplicity due to standardized power

modules – fully assembled and ready to use for

a wide range of motor starter and energy

distribution modules.

Lower lifecycle costs

These are defined in three ways; less downtime,

less fault finding and less inventory.

Information variety

MNS iS offers latest HMI technology, remote

management, innovative plug and produce

technology and real time plant condition

monitoring.

Complete solution

ABB offers the possibility to provide an all in

one solution when MNS iS is used in conjunction

with other power and automation technologies

from ABB.

Pro-active maintenance

MNS iS with Condition Monitoring indicates

conditions before a failure occurs, enabling

pro-active maintenance possibilities.