Siemens SENTRON 3VA27 - Page 110

Accessories
3.2 Electromechanical accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
108 Manual, 10/2018, L1V30499596002-01
Auxiliary switch AUX
The auxiliary contacts signal the current CLOSED or OPEN position of the circuit breaker.
The four internal auxiliary contacts AUX 4CO are installed in each circuit breaker and non-
automatic air circuit breaker as standard. The user can modify these for 24 V digital signals
or mixed contacts during device configuration as shown in the following table. An additional
external breaker position query is possible with an expansion by 15 external auxiliary
switches with AUX 15CO. You will find the necessary modification of the circuit breaker side
wall in Chapter External accessories (Page 117).
If both auxiliary contact modules are installed, up to 19 auxiliary contacts CLOSED / OPEN
are available.
Configuration
AUX 4CO / 2CO + 2CO
4 auxiliary contacts (internal)
AUX 15CO
Additional external 15 auxiliary
contacts
Standard contact
✓
✓
Contact for
digital signal
✓ ✓
Mixed signals
AUX 2CO + 2CO
✓ ✓
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
125 V
0.3 A at 10 ms
—
250 V
0.15 A at 10 ms
—
AC 250 V
5 A at cosφ 1
—
5 A at cosφ 0.7
—
5 A at cosφ 0.3
—
400 V
3 A at cosφ 1
—
2 A at cosφ 0.7
—
1 A at cosφ 0.3
—