| 摘要 |
<p>An electrical circuit arrangement including:-
an unlatching actuator (18),
a primary power source (20),
a secondary power source (22),
an electrically controlled bypass switch (24) having an energised condition at which the bypass switch adopts a first switching configuration, and having a deenergised condition at which the bypass switch adopts a second switching configuration,
an operator actuated switch (14,16),
the circuit having a first configuration in which
the bypass switch is in the first switching configuration so that the primary power source, operator actuated switch, bypass switch and unlatching actuator are configured so that actuation of the operator actuated switch causes the unlatching actuator to be energised by the primary power source, and
the circuit having a second configuration in which the bypass switch is in the second switching configuration so that the secondary power source, operator actuated switch, bypass switch and unlatching actuator are configured so that actuation of the operator actuated switch causes the unlatching actuator to be energised by the secondary power source.</p> |
