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A-56
Functions and
characteristics
Switch-disconnectors
Overview of applications
A switch-disconnector is a control device
that can be used to open and close a circuit
under normal operating conditions.
It is suitable for isolation as indicated on the
front by the symbol
.
Position of switch-disconnectors
Compact NSX switch-disconnectors are used primarily for the following applications:
busbar coupling and isolation
b
isolation of industrial distribution boards and industrial control panels
b
isolation of subdistribution boards for modular devices
b
isolation of local enclosures
b
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b
industrial control panel switch-disconnectors.
b
M
M
M
M
M
M
a
in po
w
er distribution
bo
a
rd
f
or co
mm
erci
a
l
a
pplic
a
tions
y
1000
A
S
ubdistribution bo
a
rd
f
or
m
odul
a
r products
Industri
a
l distribution
bo
a
rd
Loc
a
l
isol
a
tion
enclosure
Loc
a
l
isol
a
tion
enclosure
Building utilities
Building fin
a
l distribution Continuous pro
c
esses
M
a
nuf
ac
turing pro
c
esses
a
nd indi
v
idu
a
l
mac
hines
Industri
a
l control
p
a
nel
N.B.
Ad
jacen
t
t
o or b
u
i
lt
in
t
o
t
he machine.
Fin
a
l
distribution
enclosure
f
or
co
mm
erci
a
l
a
pplic
a
tions
M
a
in po
w
er distribution
bo
a
rd
f
or industri
a
l
a
pplic
a
tions
Repl
a
ce
m
ent
source
S
ource couplin
g
s
w
itch-disconnector
15 - 40
kA
y
1
6
0
A
15 -
2
5
kA
y
6
3
A
y
6
3
A
y
10
kA
y
6
30
A
y
2
5
kA
y
10
kA
y
40
A
y
5
kA
y
400
A
y
1
6
0
A
: 15 -
2
5
kA
y
400
A
:
2
0 - 80
kA
y
1
6
00
A
2
0 - 80
kA
DB115580
559E1700.indd
version: 1.0