MNS iS Motor Control Center System Release V6.0

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 design in accordance

with IEC61439-1/-2.

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.

1.1.1

Functional separation

The switchboard is divided into vertical and

horizontal compartments thus separating different

functional areas.

Notable system advantages with regard to

design aspects:

Compact, space-saving design

Easy project and detail engineering

through standardised components

Verified design acc.  IEC 61439-1/-2

Earthquake-, vibration- and shock-proof

designs are available

Easy retrofitting without the need for

switchgear de-energizing

Maintenance-free busbar construction

High operational reliability and availability

Optimum personal protection

As even power cabling and control wiring are

strictly separated within MNS iS, the switch

board is structured as follows:

1.  Equipment compartment

All equipment, including the standard motor

starter modules MStart or feeder modules

MFeed in withdrawable design, is situated

therein.  The compartment can be divided in

horizontal and vertical sub compartments.

2.  Control cable compartment

Contains the integrated 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

Access to integrated components such as

electronic protection relays on standard

switchgear is usually not possible if the module is

energized.

As an outstanding attribute MNS iS switchgear

provides separate compartments, one for power

cables on the right hand and another for control

cables on the left hand. The two cable compart

ments can be provided with different key locks in

order to assure specific access rights.

MNS iS motor/feeder cables are housed in their

own power cable compartment completely isol

ated from any control equipment or wiring. The

cubicle arrangements are configured suitable for

front cable access.

The power cable compartment can be provided

with cable entry from the top or bottom of the

cubicle.

The control cables have their own control cable

compartment completely segregated from the

power compartments.

This control compartment also houses the

integrated motor control units MControl and other

associated control equipment.

The control wiring can enter from the top or

bottom as required for the project. External

signals (such as pushbuttons, indicators etc.)

connect directly to the MControl main board.