ABB MNS iS Motor Control Center Functional separation

Functional separation

The switchboard is divided into vertical and horizontal compartments thus separating different functional areas.

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

Cable Compartments

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.