Technical information

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1SDC210033D0202
Electrical Accessories XT1 XT2 XT3 XT4
Shunt opening release SOR
QQQQ
Permanent shunt opening release PS-SOR
QQQQ
Undervoltage release UVR
QQQQ
Time-delay device for undervoltage release UVD
QQQQ
Auxiliary contacts
Q: open/close signalling contact
SY: trip signalling contact
S51: electronic trip signalling contact
1Q 1SY 24V DC
QQQQ
3Q 1SY 24V DC
–
QQQ
1S51 24V DC
–
Q
–
Q
1Q 1SY 250V AC/DC
QQQQ
2Q 2SY 1S51 250V AC/DC
–
Q
–
Q
3Q 2SY 250V AC/DC
–
Q
–
Q
3Q 1SY 250V AC/DC
–
QQQ
1S51 250V AC/DC
–
Q
–
Q
2Q 1SY 250V AC/DC
QQQQ
3Q on left 250V AC/DC
QQQQ
400V 1Q 1SY 400V AC
–
Q
–
Q
400V 2Q 400V AC
–
Q
–
Q
Position contacts
AUP-Racked-in
QQQQ
AUP-Racked-out
–
Q
–
Q
Early auxiliary contacts
AUE-In handle
QQQQ
AUE-Internal
–
Q
–
Q
Motor operator
MOD
Q
–
Q
–
MOE
–
Q
–
Q
MOE-E
–
Q
–
Q
Residual current devices
RC Inst
Q
–
Q
–
RC Sel 200
Q
–––
RC Sel for XT1 XT3
Q
–
Q
–
RC Sel for XT2 XT4
–
Q
–
Q
RC Sel B Type
––
Q
–
Service releases
Shunt opening release (SOR). Allows the circuit-breaker to be opened by means of a non-per-
manent electrical control. Release operation is guaranteed for voltage between 70% and 110% of
the rated power supply voltage Un, in both alternating and direct current. SOR is equipped with a
built-in limit contact to shut-off the power supply in the open position with the relay tripped.
A remote controlled emergency opening command can be created by connecting an opening but-
ton to the SOR.
Shunt opening release with permanent service (PS-SOR), unlike SOR, this version can be
continuously powered. The power input of PS SOR is much lower than the power input of SOR.
Undervoltage release (UVR). Allows the circuit-breaker to open when the release is subjected to
either a power failure or voltage drop. Opening, as prescribed in the Standard, is guaranteed when
the voltage is between 70% to 35% of Un. After tripping, the circuit-breaker can be closed again
if the voltage exceeds the 85% of Un. When the undervoltage release is nor energized, neither the
circuit-breaker nor the main contacts can be closed. A remote controlled emergency opening com-
mand can be created by connecting an opening button to the UVR.
None of the service releases in the Tmax XT series require screws for installation. They are extremely
easy to fit. Just use slight pressure in the appropriate place. All service releases are available in two
versions:
Q
cabled (AWG20 cable section - 0.5mm
2
up to 300V, AWG17 - 1mm
2
up to 525V):
– for fixed/plug-in circuit-breakers with 1m long cables;
– for withdrawable circuit-breakers with fixed part and moving part connector;
Q
not cabled:
– for fixed/plug-in circuit-breakers with cables from 1.5 mm
2
in section.
Cabled SOR - PS SOR - UVR
Cabled SOR - PS SOR - UVR
for withdrawable circuit-breaker
Uncabled
SOR - PS SOR - UVR
Accessories
Electrical Accessories