Siemens SENTRON 3VA27 - Page 102

Accessories
3.2 Electromechanical accessories
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
100 Manual, 10/2018, L1V30499596002-01
Undervoltage release (UVR)
The undervoltage release trips the circuit breaker if the rated control supply voltage U
s
fails
or drops to between 70% and 35% of its normal value (in compliance with the relevant
standard). The undervoltage release can be used for:
● Safe remote tripping
● Interlocking during closure
● Checking the voltage in the primary and secondary circuits
The undervoltage release is powered via the auxiliary conductor terminal system.
Note
The circuit breaker can be reclosed at a coil supply voltage of 85% to 110%
U
n
.
Suitable for continuous operation: 100% ON time
Technical specifications
AC
DC
Rated control supply voltage U
s
24 V
✓
✓
30 V
✓
✓
48 V
✓
✓
60 V
✓
✓
110 to 120 V
✓
✓
120 to 127 V
✓
✓
220 to 240 V
✓
✓
240 to 250 V
✓
✓
380 to 400 V
✓
—
415 to 440 V
✓
—
Operating limits UVR: ON: 85 to 110% U
s
UVR: OFF: ...< 70% U
s
Switch-on power 300 VA 300 W
Continuous power
3.5 VA
3.5 W
Break time UVR
30 ms