Page 177 - SACE Tmax XT - Catalogue

ACCESSORIES 7/31

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Remote control

Remote control XT1 XT2 XT3 XT4 XT5 XT6 XT7 XT7 M
SOR - Shunt opening release     - - - -
UVR - Undervoltage release     - - - -
Service release YO - Shunt opening release - - - -    
YU - Undervoltage release - - - -    
YC - Shunt closing release - - - - - - - 
Remote reset YR - Resetting remotely - - - - - - - 
YO/YC Test Unit YO/YC Test Unit        
Time delay
device for YU UVD - Time delay device for YU        
MOD  -  - - - - -
MOE -  -    - -
Motor operator
MOE-E -  -   - - -
M - Motor - - - - - - - 

Service releases
The SACE Tmax XT circuit-breakers can be fitted with service releases (shunt opening release, shunt
closing release for XT7M only and undervoltage release).

XT1, XT2, XT3 and XT4

Shunt opening release – SOR
This allows the circuit-breaker to open by means of a non-permanent electrical control. Release opera- 07
tion is guaranteed for voltage between 70% and 110% of the rated power supply voltage Un, in both al-
ternating and direct current. The SOR is equipped with a built-in limit contact to shut-off the power
supply in the open position with the trip unit tripped.
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Cabled SOR - UVR

Undervoltage release – UVR
This allows the circuit-breaker to open when the release is subject either to a power failure or a voltage
drop. As prescribed in the standards, opening is guaranteed when the voltage is between 70% to 35%
Un. After tripping, the circuit-breaker can be closed again if the voltage exceeds the 85% Un. When the
undervoltage release is not energized, neither the circuit-breaker or the main contacts can be closed. A
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Cabled SOR - UVR for remote-controlled emergency opening command can be generated by connecting an opening button to
withdrawable circuit- the UVR.
breaker
None of the service releases 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:
• cabled (AWG20 cable section - 0.5mm up to 300V, AWG17 - 1mm up to 525V):
2
2
- for fixed/plug-in circuit-breakers with 1m long cables;
— - for withdrawable circuit-breakers with a fixed and moving part connector;
Uncabled SOR - UVR
• not cabled:
2
- for fixed/plug-in circuit-breakers with cables from 1.5 mm in cross-section.