Multi-phase medium voltage contactor
View Patent ↗A multi-phase Medium Voltage Contactor ( 100 ) comprising: for each phase, a fixed contact ( 103 ) and a movable contact ( 104 ) positionable between an open position, in which it is operatively disconnected from the fixed contact ( 103 ), and a closed position in which it is operatively connected to the fixed contact ( 103 ); an electromagnetic actuator ( 10 ) operatively connected to the movable contact ( 104 ) and positionable between a first open position corresponding to the open position of the movable contacts ( 104 ), and a second closed position corresponding to the closed position of the movable contacts ( 104 ); a manual opening device ( 20 ) operatively connected to the electromagnetic actuator. The manual opening device ( 20 ) comprises a kinematic mechanism having: an operating shaft ( 8 ); first lever means ( 3 ) movable by the operating shaft ( 8 ); second lever means ( 4 ) movable by the first lever means ( 3 ) and operatively coupled to the electromagnetic actuator, blocking means ( 5 ) movable by the first lever means ( 3 ) between a first position in which the blocking means ( 5 ) lock the second lever means ( 4 ) and a second position in which the second lever means ( 4 ) are released thereby determining the positioning of the electromagnetic actuator ( 10 ) from said closed position into said open position.
1. A multi-phase Medium Voltage Contactor comprising:
for each phase, a fixed contact and an associated movable contact positionable between an open position, in which it is operatively disconnected from said fixed contact, and a closed position, in which it is operatively connected to said fixed contact;
an electromagnetic actuator operatively connected to said movable contact and positionable between a first, open position corresponding to the open position of said movable contact, and a second, closed position corresponding to said closed position of said movable contact;
a manual opening device operatively connected to said actuator;
wherein said manual opening device comprises a kinematic mechanism having:
an operating shaft;
first lever means movable by said operating shaft;
second lever means movable by said first lever means and operatively coupled to said electromagnetic actuator,
blocking means movable by said first lever means between a first position in which said blocking means lock said second lever means and a second position in which said second lever means are released to exert force on a pin of the electromagnetic actuator, thereby determining the positioning of said electromagnetic actuator from said closed position into said open position.
2. A multi-phase Medium Voltage Contactor according to claim 1 , wherein said blocking means comprise a profile with a cam and a step, so that said second lever means are blockable by engagement with said cam and unblockable at the reaching of said step.
3. A multi-phase Medium Voltage Contactor according to claim 2 , wherein said blocking means comprise a protuberance engageable to/draggable by said first lever means.
4. A multi-phase Medium Voltage Contactor according to claim 2 , wherein said kinematic mechanism comprises primary elastic means interposed between said first lever means and said second lever means.
5. A multi-phase Medium Voltage Contactor according to claim 2 , wherein said first lever means comprise a rotatable first lever connected to said operating shaft.
6. A multi-phase Medium Voltage Contactor according to claim 1 , wherein said blocking means comprise a protuberance engageable to/draggable by said first lever means.
7. A multi-phase Medium Voltage Contactor according to claim 6 , wherein said protuberance is placed eccentrically with respect to said blocking lever, said first lever means comprising a slot inside which said protuberance is movable.
8. A multi-phase Medium Voltage Contactor according to claim 6 , wherein said kinematic mechanism comprises primary elastic means interposed between said first lever means and said second lever means.
9. A multi-phase Medium Voltage Contactor according to claim 6 , wherein said first lever means comprise a rotatable first lever connected to said operating shaft.
10. A multi-phase Medium Voltage Contactor according to claim 1 , wherein said kinematic mechanism comprises primary elastic means interposed between said first lever means and said second lever means.
11. A multi-phase Medium Voltage Contactor according to claim 10 , wherein said primary elastic means are compressible by said first lever means so as to store elastic energy, at least a part of said elastic energy being capable to determine a snap movement of said second lever means.
12. A multi-phase Medium Voltage Contactor according to claim 11 , wherein at least a further part of said elastic energy is capable to determine a return movement of said first lever means and second lever means.
13. A multi-phase Medium Voltage Contactor according to claim 12 , wherein said kinematic mechanism comprises secondary elastic means with a first end coupled to said blocking means and a second end coupled to said second lever means.
14. A multi-phase Medium Voltage Contactor according to claim 11 , wherein said kinematic mechanism comprises secondary elastic means with a first end coupled to said blocking means and a second end coupled to said second lever means.
15. A multi-phase Medium Voltage Contactor according to claim 14 , wherein said secondary elastic means are capable to determine a return movement of said blocking means and a consequent return movement of said second lever means by engagement of said second lever means with said blocking means.
16. A multi-phase Medium Voltage Contactor according to claim 11 , wherein said first lever means comprise a rotatable first lever connected to said operating shaft.
17. A multi-phase Medium Voltage Contactor according to claim 10 , wherein said first lever means comprise a rotatable first lever connected to said operating shaft.
18. A multi-phase Medium Voltage Contactor according to claim 1 , wherein said first lever means comprise a rotatable first lever connected to said operating shaft.
19. A multi-phase Medium Voltage Contactor according to claim 18 , wherein said second lever means comprise a second lever rotatably hinged with a rotation axis parallel to the rotation axis of said first lever.
20. A multi-phase Medium Voltage Contactor according to claim 6 , wherein said blocking means comprise a blocking lever rotatably hinged to the same rotation axis of said first lever.
21. A multi-phase Medium Voltage Contactor comprising:
for each phase, a fixed contact and an associated movable contact positionable between an open position, in which it is operatively disconnected from said fixed contact, and a closed position, in which it is operatively connected to said fixed contact;
an electromagnetic actuator operatively connected to said movable contact and positionable between a first, open position corresponding to the open position of said movable contact, and a second, closed position corresponding to said closed position of said movable contact;
a manual opening device operatively connected to said actuator;
wherein said manual opening device comprises a kinematic mechanism having:
an operating shaft;
first lever means movable by said operating shaft;
second lever means movable by said first lever means and operatively coupled to said electromagnetic actuator,
blocking means movable by said first lever means between a first position in which said blocking means lock said second lever means and a second position in which said second lever means are released to exert force on a pin of the electromagnetic actuator, thereby determining the positioning of said electromagnetic actuator from said closed position into said open position;
wherein said kinematic mechanism comprises:
primary elastic means interposed between said first lever means and said second lever means; and
secondary elastic means with a first end coupled to said blocking means and a second end coupled to said second lever means.
22. A multi-phase Medium Voltage Contactor according to claim 21 , wherein said secondary elastic means are capable to determine a return movement of said blocking means and a consequent return movement of said second lever means by engagement of said second lever means with said blocking means.