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ACCESSOR I ES
XT7 and XT7M Shunt opening and shunt closing releases - YO/YC
These opening and closing releases enable the circuit-breaker to be controlled remotely. Opening is always possible, while closing is available only for the XT7 M when the closing springs of the operating mechanism are loaded and the circuit-breakers are ready to close. The releases operate by means of minimum impulse current duration time of 100 ms. Furthermore, they can operate in permanent service. In this case, if the opening command is given by means of the opening release, the circuit-breaker can be closed by de-ener- gizing the opening release and, after a time of at least 30 ms, by controlling the closing. A second open release is an alternative to an undervoltage release.
— Shunt opening release
General characteristics Power supply (Un)
AC
DC
24V 30V 48V 60V
110V…120V 120V…127V 220V…240V 240V…250V 380V…400V 415V…440V 480V…500V
- - -
Operating limits Inrush power (Ps)
YO/YO2: 70%...110% Un
YC: 85%...110% Un
300VA
300W
Continuous power (Pc) Opening time (YO/YO2) XT7-XT7 M Closing time (YC/YC2) XT7-XT7 M
3.5VA
3.5W
20 ms
50 ms
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