221 / 267
3VT5 Molded Case Circuit Breakers up to 1600 A
Accessories and Components
Overcurrent releases
6/19
Siemens LV 36 · 2008
6
Overcurrent releases ETU DP-Distribution
Protecting lines and transformers
The 3VT9 5..-6AC00 release is intended for 3VT5 716-3AA3.-
0AA0 switching unit. The operation of the release is controlled by
a microprocessor. The release is outfitted with a thermal memory
that can be disabled by turning a switch on the front panel from
position T
(t)
to position T
(0)
. After disabling the thermal memory,
the thermal release remains active.
A practical advantage of the release is a specially designed
tripping characteristic that provides for optimal exploitation of
transformers up to 1.5
I
n
.
Another advantage of this release is the simple adjustment of the
tripping characteristic. Set-up includes only rated current and
the tripping level of the short-circuit release. The reaching of
80% and 110% of
I
r
is indicated by LED diodes on the front panel
denoted as
I
> 80% of
I
r
and
I
> 110% of
I
r
. On the bottom part
of the release cover are photocells for communicating with the
3VT9 500-6AE00 signalling unit.
Tripping characteristics
Adjustable specifications
0.02
0.02
0.02
0.05
0.05
0.05
3
3
I
r
I
i
0.01
0.01
0.01
NSO0_00458
L
I
20
200
2000
50
500
5000
10
100
1000
10000
t
[s]
0.01
0.02
0.05
0.1
0.1
0.1
0.1
0.2
0.5
1
2
5
I
n=630A
I
n=1000A
I
n=1250A
I
n=1600A
n
630 A
1 0 A
1250 A
16 0 A
0.8
1.25
1.5
2.0 4.0 6.0 8.0 11 14 17
20
2.0
3.0 5.0 7.0 9.0 12 15 18
3.0 5.0 7.0 9.0 12 15
1.5 2.0 2.5 4.5
10
6.0 7.5
I
n
= 630 A
I
n
= 1000 A
I
n
= 1250 A
I
n
= 1600 A
x
I
n
1 2
5
20
50
10
0.1 0.2 0.5
I
i
[kA]
I
i
[kA]
I
i
[kA]
I
i
[kA]
I
r
min.
max.
Order No.
Rated current
I
n
Overload
protection
I
r
Restart
Instantaneous
short circuit
protection
I
A
A
kA
250, 260
0.8
275, 290
1.5
305, 315
2
3VT9 563-6AC00 630
345, 360 T
(0)
2.5
400, 435 T
(t)
4.5
455, 480
6
500, 550
7.5
575, 630
10
400, 435
1.25
455, 480
2
500, 550
3
3VT9 510-6AC00 1000
575, 630 T
(0)
5
630, 685 T
(t)
7
720, 760
9
800, 870
12
910, 1000
15
500, 550
1.5
577, 610
3
630, 685
5
3VT9 512-6AC00 1250
722, 760 T
(0)
7
800, 866 T
(t)
9
909, 1000
12
1100, 1155,
15
1200, 1250
18
630, 685
2
720, 800
4
870, 910
6
3VT9 516-6AC00 1600
1000, 1100 T
(0)
8
1155, 1200 T
(t)
11
1250, 1300
14
1375, 1445
17
1500, 1600
20