Accessories
3.2 Electromechanical accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
Manual, 10/2018, L1V30499596002-01
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Tripped signaling switch (S24)
The contact signals tripping of the circuit breaker by the electronic trip unit ETU.
The changeover contact is always contained in the scope of delivery of the circuit breaker
(not non-automatic air circuit breakers) and can be obtained in a version for digital signals by
configuration modification.
Standard contact
Contact for digital signal
Type
Changeover contact
Changeover contact
Smallest load
100 mA at 24 V
1 mA at 5 V
Breaking capacity
DC
24 V
—
0.1 A
250 V
0.5 A at 0 ms
—
0.2 A at 10 ms
—
AC
250 V
3
A at cosφ 0.7
—
Mechanical tripped signal RESET button
The circuit breaker can only be reclosed once the mechanical signaling button for "ETU
tripped" (reset) has been operated or the circuit breaker has been reset to its normal
operating position manually or by means of the remote reset magnet RR.
Tripped signaling switch via auxiliary release (S25)
The tripped signaling switch via auxiliary release (S25) signals tripping of the circuit breaker
by the shunt release or undervoltage release.
The tripped signaling switch via auxiliary release (S25) can only be used for 3VA27 molded
case circuit breakers with toggle.
Leading changeover switch (S26)
The leading changeover switch (S26) signals opening of the main contacts in advance of
circuit breaker trips and are thus used for load shedding, for example.
The leading changeover switch (S26) can only be used for 3VA27 molded case circuit
breakers with toggle.