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3VT5 Molded Case Circuit Breakers up to 1600 A
Accessories and Components
Overcurrent releases
6/20
Siemens LV 36 · 2008
6
Overcurrent releases ETU MP-Motors
• Direct protection for motors and generators
• Possibility for protecting lines and transformers
The 3VT9 5..-6AP00 release is intended only for 3VT5716-3AA3.-
0AA0 switching unit. The operation of the release is
controlled by a microprocessor. The release is equipped 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
of the thermal memory, the thermal release remains active.
A partical advantage of the release is a specially designed
tripping characteristic that provides for optimal exploitation of
transformers up to 1.5
I
n
.
A of 8 characteristics can be set on the release. From these, in
mode “M” there are 4 characteristics for motors protection and
another 4 characteristics in mode “TV” for protecting transform-
ers and lines. The shape of each characteristic can be
changed using a selector switch.
When one or two phases fail, in the M-characteristic mode, the
switch will open with a 4 s delay (so-called undercurrent
release).
Another parameter for adjusting the release is rated current,
which is adjusted in a range of 0.4 to 1.0 of
I
n
and the short-
circuit tripping level. 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 four photocells for communicating with the 3VT9 500-6AE00
signalling unit.
Adjustable specifications
Order No.
Rated
current
I
n
Overload
protection
I
r
t
t
(7.2 x
I
r
)
Restart Instanta-
neous short
circuit pro-
tection
I
i
A A
S
kA
250, 260 1 (TV 1)
0.8
275, 290 3 (TV 3)
1.5
305, 315 10 (TV 10)
2
3VT9 563-6AP00 630 345, 360 30 (TV 30)
T
(0)
2.5
400, 435 3 (M 3)
T
(t)
4.5
455, 480 8 (M 8)
6
500, 550 15 (M 15)
7.5
575, 630 25 (M 25)
10
400, 435 1 (TV 1)
1.25
455, 480 3 (TV 3)
2
500, 550 10 (TV 10)
3
3VT9 510-6AP00 1000 575, 630 30 (TV 30)
T
(0)
5
630, 685 3 (M 3)
T
(t)
7
720, 760 8 (M 8)
9
800, 870 15 (M 15)
12
910, 1000 25 (M 25)
15
500, 550 1 (TV 1)
1.5
577, 610 3 (TV 3)
3
630, 685 10 (TV 10)
5
3VT9 512-6AP00 1250 722, 760 30 (TV 30)
T
(0)
7
800, 866 3 (M 3)
T
(t)
9
909, 1000 8 (M 8)
12
1100, 1155, 15 (M 15)
15
1200, 1250 25 (M 25)
18
630, 685 1 (TV 1)
2
720, 800 3 (TV 3)
4
870, 910 10 (TV 10)
6
3VT9 516-6AP00 1600 1000, 1100 30 (TV 30)
T
(0)
8
1155, 1200 3 (M 3)
T
(t)
11
1250, 1300 8 (M 8)
14
1375, 1445 15 (M 15)
17
1500, 1600 25 (M 25)
20