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
Vertical distribution bus bar
The MCC standard vertical bus bars are 800A and
are embedded inside the multi-function wall. The
bus bars run A, B and C phase from left to right.
These bus bars may feed the modular fixed and
withdrawable units. See 1.8.6. Section - Multi-
function wall.
The vertical bus can be reinforced with additional
buses installed on the rear of the multi-function
wall, increasing the current rating from 800A to
1,600A.
They are available in silver-plated and tin-plated
copper as standard.
Optional bus bars
• Vertical Ground Bar: May be added inside of the
Multi-function Wall.
• Vertical Neutral Bar: May be supplied in the
vertical wireway. This option is available only for
MCC´s with vertical wireways 200mm (7.87 in)
wide (for a minimum section width of 600 mm
(23.6 in). The vertical neutral bar will be provided
with a series of holes for connecting neutral
cables using compression lugs.
See Fig. 8 (Vertical distribution bus bar).
Equipment compartment
The equipment compartment is composed of one
or more cubicles housing units. These units include
three types: fixed, modular fixed and withdrawable.
These units may be equipped with measuring,
operating or indicating instruments. These
instruments may be installed inside the units or,
usually, on the front of the unit door.
Section and unit numbering
Each MCC section is sequentially numbered when
the general arrangement drawings are prepared.
The left-most section is usually 1, the next section
to the right is 2, etc. This numbering scheme
ensures the correct sequencing of vertical sections
during installation.
Within each section, the equipment compartment
is divided vertically into 72E. “E” is the Elementary
grid or units. Each E height increment is equal to 25
mm (1 in). For example, a unit that is 300 mm (11.7
in) would be 12E.
The top location is designated as “A”. Each “2E”
units increment to the next letter of the alphabet.
See Fig. 9 (Unit Location Numbering). The next
location designation after Z is AA. The bottom
location is MM.
—
08 —
09
—
08 Vertical distribution
bus bar
—
09 Unit location
numbering
3-phases vertical
bussing (Embedded
inside the MFW)
Bussing connection
between vertical and
horizontal neutral
busses (where required)
Vertical neutral
bus (Optional)
Vertical ground
bus (Optional)
Multi-function
wall (MFW)
Bussing
connection
between vertical
and horizontal
ground busses
(where required)
Section 1
Unit 1-A
30E
Unit 1-A
6E
Unit 1-U
12E
Unit 1-АА
24E
A
B
C
D
E
F
G
H
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
AA
BB
CC
DD
EE
FF
GG
HH
JJ
KK
LL
MM
Section 2