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Operating Instructions
CAUTION
If an undervoltage release has been installed, it must be energized,
otherwise the circuit breaker cannot be closed! After a tripping ope-
ration due to thermal overload, the circuit breaker can only be rec-
losed after a cooling period of several minutes.
5 Cross-sections for main conductors and tightening torques
6 Connection diagram for 3- and 4-pole circuit breakers
7 Toggle lever position and switching state
8 Toggle lever switching state indication
9 Shunt trip
10 Undervoltage release
11 1st auxiliary switch
12 2nd auxiliary switch
13 Alarm switch
14 Position of toggle lever
15 Auxiliary switching states
16 Alarm switching states
17 Rating under different temperatures
18 Current setting for thermal magnetic overload tripping
19 Tripping characteristic curve
(5)
Rated current
Cross-section mm
10 A
1.5
16 A
2.5
20 A
2.5
25 A
4
32 A
16
40 A
25
50 A
35
63 A
16
80 A
25
100 A
35
(6)
Undervoltage release conforms to IEC 947-2
A5E00817847-01
2
Tightening torques Nm
2 ~ 2.5
3 ~ 3.5
4 ~ 6
(7)
(8)
Test button
Setting the overload and short-circuit trips
For the VT63 and VT100 circuit breakers, the long-time delay overload
protection and instantaneous short-circuit protection are fixed. The cur-
rent settings are described in Table (18).
Load capacity at various ambient temperatures
The permissible loading of the circuit breaker is dependent on the
ambient temperature in its immediate vicinity, see Table (17).
(17)
Rated current
of frame size
I
+10 °C
n
63 A
1.19
100 A
1.2
Rated current
Ambient temperature
of frame size
I
+55 °C
n
63 A
0.9
100 A
0.89
English
ON
TRIP
RESET
(OFF)
4-pole version
Ambient temperature
+20 °C
+30 °C
+40 °C
1.13
1.06
1.0 I
n
1.14
1.08
1.0 I
n
+60 °C
0.87
0.85
+50°C
0.93
0.93
7
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