5
4
No clamp screws used
for the main circuit
contact units
There are no clamp screws or flexible leads
in the main circuit contact units.
This substantially enhances the durability of
the main circuit contact units and improves
the reliability in ON-OFF operation.
Isolating main contact
Fixed main contact
Moving main contact
Main circuit contact units
Easy Maintenance
The unique design of
TemPower2
incorporates its
isolating clusters and main contacts on the ACB body.
Allowing for quick easy maintenance of the main
electrical contact points and for maintenance to be
completed without having to isolate the switchboard.
Features
1
A high performance and reliability
Very fast interruption by
“DoubleBreak”
system
The unique
“DoubleBreak”
main contact system
ensures extremely fast interruption of short circuit
currents and substantially reduces main contact wear.
The internally symmetrical
“DoubleBreak”
structure
means the moving contact is isolated from the supply
voltage even when the ACB is reverse connected.
The neutral pole of all
TemPower2
ACBs are of early
make/late break design. This eliminates the risk of
abnormal line to neutral voltages, which may damage
sensitive electronic equipment.
“
DoubleBreak
” contacts increase service life -
Electrical and mechanical endurance ratings are the
best available, and exceed the requirements of IEC
60947-2.
Enhanced selectivity
At Terasaki our protection
relays have ‘LSI’ characteristics
as standard.
This provides an adjustable time
delay on overload (L) and also the
l
2
t ramp characteristic (S).
As shown, these are essential to
provide selectivity when grading
with other protective devices such
as downstream fuses and up-
stream relays.
The standard ‘LSI’ curve provides
more than five million combina-
tions of unique time current characteristics.
Zone selective interlocking is available to provide zero time delay selectivity.
As the rated breaking capacity is identical to the rated short-time withstand current full selectivity can be
achieved.
L
Long time delay
S
Short time delay
I
Instantaneous
e
c
n
a
m
r
o
f
r
e
P
t
n
e
r
r
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c
d
e
t
a
r
d
n
a
e
p
y
T
S
8
0
2
R
A
A
0
0
8
A
0
5
2
1
S
2
1
2
R
A
A
0
0
6
1
S
6
1
2
R
A
A
0
0
0
2
S
0
2
2
R
A
A
0
5
2
1
H
2
1
2
R
A
A
0
0
6
1
H
6
1
2
R
A
A
0
0
0
2
H
0
2
2
R
A
A
0
0
5
2
S
5
2
3
R
A
A
0
0
2
3
S
2
3
3
R
A
A
0
0
6
1
H
6
1
3
R
A
A
0
0
0
2
H
0
2
3
R
A
A
0
0
5
2
H
5
2
3
R
A
A
0
0
2
3
H
2
3
3
R
A
A
0
0
0
4
S
0
4
4
R
A
g
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a
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d
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R
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V
0
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4
C
A
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a
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n
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c
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t
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S
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h
t
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p
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t
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e
d
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S
h
t
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)
s
n
o
i
t
c
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f
R
C
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/
p
i
r
t
T
S
N
I
t
u
o
h
t
i
W
(
A
k
5
6
A
k
0
8
A
k
5
8
A
k
0
0
1
A
k
0
0
1
)
.
c
e
s
1
r
o
f
(
t
n
e
r
r
u
c
d
n
a
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s
h
t
i
w
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m
i
t
-
t
r
o
h
s
d
e
t
a
R
4000A
2500A
3200A
2000A
800A
1600A
More than
30,000 cycles
More than
25,000 cycles
More than
20,000 cycles
More than
15,000 cycles
(Standard Series)
Note: above figures are the mechanical endurance with maintenance. For details please refer to pages 14 & 15.
A substantial improvement in
life cycles
The
TemPower2
series has achieved very high life
cycles compared with our competitors.
AH6 ACB Range
5000Amp (Icw, 1 sec 100kA -
Ics 120kA) and 6300Amp
(Icw, 1 sec 120kA - Ics
120kA) 3 and 4 Pole ACBs.
Catalogue Ref. – 04-I52E
