8
A5E00817857-01
Operating Instructions
English
For the VT400 the fixed-mounted circuit breaker is the basic
version. This can be converted very easily into a plug-in version
with the aid of the appropriate mounting set. This set contains
blade contacts, a locking pin and terminal covers for the plug-in
version. See Fig. 5 for VT400 plug-in version pictures and
dimensions.
6 Cross-sections for main conductors and tightening torques
7 Connection diagram for 3- and 4-pole circuit breakers
8 Toggle lever position and switching state
9 Toggle lever switching state indication
10 Shunt trip
11 Undervoltage release
12 1st auxiliary switch
13 2nd auxiliary switch
14 Alarm switch
15 Position of toggle lever
16 Auxiliary switching states
17 Alarm switching states
18 Rating under different temperatures
19 TM trip unit picture and ETU front panel
20 Range of current settings for thermal magnetic overload
tripping
21 Tripping characteristic curve
22 Protective curve of ETU
Installation type
CAUTION
If an undervoltage release has been installed, it must be
energized, otherwise the circuit breaker cannot be closed!
After a tripping operation due to thermal overload, the circuit
breaker can only be reclosed after a cooling period of several
minutes.
VT400 withdrawable version circuit breaker
(5) VT400 plug-in version circuit breaker
Rated current
Cross-section
mm
2
Tightening torques
Nm
160 A
200 A
250 A
70
95
120
12 ~ 16
,
2
Test button
ON
TRIP
RESET
(OFF)
4-pole version
#
$
#
$
)
)
)
5
)
.
.
(7)
(8)
(9)
Undervoltage release conforms to IEC 947-2
(6)
