ABB MNS-MCC, Инструкция по установке, эксплуатации и обслуживанию

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M N S - MCC
LO W VO LTAG E M OTO R CO N T R O L C EN T ER
Connection to external control source
(if required)
If an external control source is used, it should be
stable and not subject to variations. Consult your
ABB representative for minimum VA requirements.
Terminals will usually be provided in the top or
bottom wireway of the first or last section of the
line-up. More details will be found in the MCC
drawings.
Neutral conductor connection (if provided)
Connect the neutral conductors to the neutral bar
in the vertical wireway using compression lugs.
Make the connection at the height of the relevant
unit. See Fig. 8.
Warning:
Do not connect grounding conductors to
any load neutral terminals.
Other installation information
Pull box
Main lug for 800 A and 1200 A the lug connections
is placed inside of the 10E space designated for the
horizontal wireway, a pull box of 14 in (356 mm)
shall be placed on top of the section to meet the
minimum bend distance.
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59 MLO pull box
Note:
Do not attempt to attach lifting means to
sections provided with pull boxes or to lift sections
provided with pull boxes.
Interruption of installation
If work is interrupted during installation or
connection, take appropriate measures to ensure
that dust, moisture and foreign objects are not
allowed to enter the MCC enclosures.
Close the section doors whenever installation work
stops or is delayed. For interruptions lasting more
than a day, cover the sections with plastic sheets or
shrink wrap. In damp or humid environments, use
heaters to prevent condensation. See the
Temporary Storage section of this manual for
more information.
Storing unit outside the MCC
If you remove units from the MCC for any reason,
you must protect them by covering or wrapping
them in plastic and marking them with their
location so they can be returned to the proper
location in proper lineup. If you relocate the
location of a unit within the MCC, ensure that the
unit is marked to indicate its new location. The
drawings should also be updated.
Surface damage
To extend the life and ensure the safe operation of
your MCC, keep the exterior clean and in good
condition. To remove grease or oil on the exterior,
use a solvent cleaning agent (e.g. 3M™ Prep
Solvent-70 Cleaner) and a cloth or disposable wipe.
Repair scratches to the paintwork with ABB
supplied touch-up paint. If touch-up paint was not
supplied, contact your ABB representative. See the
Exterior Metal Damage Repair section in this
manual for repair instructions.
Adding/Upgrading a unit
Do not exceed the maximum amperage available
for the vertical section. Install the correct power
cable connection unit and control terminal block.
Adjust the compartment bottom plate to the
appropriate height. Adjust the bucket height as
described in the Changing compartment Height
section and update the drawings. You can move the
control terminal block support and power cable
connection unit as required for the unit terminals.
Notice:
Always consult ABB before adding
new units or increasing total load within
vertical sections. Changes to total electrical
load within a vertical section can result in
increased heat, possibly leading to
equipment damage and reduced life.
Adding new units or increasing the total load may
void your warranty.
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