03
NWC1 Series Self-healing Low Voltage Shunt Capacitors
4
.
3
The
capacitors
are
placed
in
the
capacitor
compensation
cabinet
which
should
provide
the
following
protection
measures
.
See
Table
4
for
details
.
Table
4
Capacitor
protection
measures
in
cabinet
Protective
characteristics
Name
and
function
of
support
devices
Typical
models
Transient
overvoltage
protection
Zinc
-
oxide
surge
arrestor
or
surge
protector
FYS
-
0
.
28
or
NU6
-
2
Transient
overcurrent
protection
Capacitor
dedicated
contactor
,
current
limiting
reactor
,
or
smart
compound
switch
with
zero
-
cross
detection
.
CJ19
,
XD1
or
ZCK
Steady
stage
overvoltage
protection
Generally
,
compensation
controller
can
provide
overvoltage
protection
.
NWK1
-
G
,
NWKL1
Steady
stage
overcurrent
protection
Thermal
relay
or
capacitor
switch
with
overcurrent
protection
function
.
JR36
or
ZCK
Short
circuit
protection Choose
fast
acting
fuse
for
short
circuit
protection
.
For
capacitors
with
capacity
＜
30kvar
,
user
can
use
miniature
circuit
breaker
for
short
circuit
protection
.
For
capacitors
with
capacity
≥
30kvar
,
miniature
circuit
breaker
is
not
recommended
.
RT36
or
NT00
NWC1
series
square
case
products
consist
of
fully
independent
units
with
automatic
protection
functions
.
The
units
use
cylindrical
stretched
aluminum
enclosure
while
the
case
is
made
of
cold
-
roll
steel
sheets
.
This
structure
provides
double
protection
which
eliminate
the
risks
of
explosion
and
leakage
and
guarantees
safety
.
See
Figure
1
-
4
below
for
outline
and
installation
dimensions
.
5
Main
Features
,
Outline
and
Installation
Dimensions
67
H
H
+3
4.5
194
25 25
224
206
41
Φ 6× 10
Figure 1 (1-20) kvar outline and installation dimensions
3-M6
132
224
254
Φ 12× 16
Figure 2 (22-40) kvar outline and installation dimensions
3-M8
H
H
+
41
194
28 28
132
350
380
Φ 12× 20
320
300
80
375
80
Figure 3 (45-60) kvar outline and installation dimensions
3-M12
380
350
Φ
12× 20
196
320
300
375
80
80
3-M2
Figure 4 (80-100) kvar outline and installation dimensions
