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ABB MNS iS design aspects Module connection to distribution bars

From:ABB | author:Mr.Chen | Time :2024-12-30 | 150 view: | Share:

Power contact

Connection to the distribution bars is realized

using the precision-engineered MNS power

contacts. The power contact is characterized by a

turn-able bearing, thus decoupling cable stress

and electrical contact. Consequently any cable

bending forces cannot affect the stability of the

power contact.

The mechanical stabilisation is taken over by

the supporting plate and the contact spring

where the contact fingers ensure positive

electrical contact. Contact fingers are silver

plated as standard.

The contact has been subjected to several tests in

order to prove the sophisticated design and the

high quality:

• Verification by testing acc. IEC 61439 series

• Corrosion test acc. DIN 50017 and

IEC 60068-2-60

• Crimping quality check acc. IEC 61238-1

• Vibration and shock test acc. IEC 60068-2-6

and IEC 60068-2-27

A condaptor unit facilitates the horizontal

distribution of power from the vertical

distribution bars for 6E/4 and 6E/2 modules, see

illustration on page 35. The condaptor enables

the modules to be located adjacently within the

same horizontal position of the cubicle.

Modules of size 6E and above are connected

directly to the vertical distribution bars.

System highlights

• Although IEC 61439 series requires 200

connection cycles only, the MNS contact system

is tested, certified and proven for contact cycles

(plug in/unplug) up to 1,000

• The contacts are silver coated as standard

• Full individual phase segregation assured prior

to the connection of the power contact.

See illustrations on the following page

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