Electromagnetic contactor with overload relay
First Claim
Patent Images
1. A starter comprising:
- a multi phase DC controlled contactor comprising;
at least one stationary contact mounted within a contactor housing;
a moveable contact mounted in operable association with the stationary contact;
a moveable contact carrier slidably mounted to the contactor housing;
an electromagnetic coil mounted to the contactor housing for attracting the moveable contact carrier;
at least one flexible coil terminal attached at one end to the electromagnetic coil and extending out through the contactor housing; and
an overload relay interlockingly coupled with the contactor and including a printed circuit board residing within a overload relay housing for controlling power to the contactor coil;
wherein an abutting electrical connection between the flexible coil terminal and the printed circuit board is made when the overload relay is coupled to the contactor.
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Accused Products
Abstract
An electromagnetic starter with an overload relay having magnetic flux shielding is disclosed for use in industrial contactor applications. The starter includes a multi-pole DC controlled contactor which is interlockingly coupled to an overload relay. The overload relay has a simplified interlocking connection to the contactor, which when made, corresponds to an abutting electrical connection between the contactor and the overload relay also being made. The contactor further has a guiding pin that promotes even contact closure within the contactor.
25 Citations
25 Claims
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1. A starter comprising:
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a multi phase DC controlled contactor comprising; at least one stationary contact mounted within a contactor housing; a moveable contact mounted in operable association with the stationary contact; a moveable contact carrier slidably mounted to the contactor housing; an electromagnetic coil mounted to the contactor housing for attracting the moveable contact carrier; at least one flexible coil terminal attached at one end to the electromagnetic coil and extending out through the contactor housing; and an overload relay interlockingly coupled with the contactor and including a printed circuit board residing within a overload relay housing for controlling power to the contactor coil; wherein an abutting electrical connection between the flexible coil terminal and the printed circuit board is made when the overload relay is coupled to the contactor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A starter comprising:
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a multi phase DC controlled contactor comprising; at least one stationary contact mounted within a contactor housing having at least one connecting slot; a moveable contact mounted in operable association with the stationary contact; a moveable contact carrier slidably mounted to the contactor housing; an electromagnetic coil attached to the contactor housing for attracting the moveable contact carrier; a platform extending from the contactor housing and having a plurality of coil supports attached thereto; at least one flexible coil terminal attached at one end to the electromagnetic coil and extending out from the contactor housing onto the coil supports; an overload relay interlockingly coupled with the contactor comprising; at least one retaining projection extending from the overload relay; a flexing lock tab integral with each retaining projection; a printed circuit board residing within an overload relay housing for controlling power to the contactor; a magnetic flux concentrating shield connected to and residing in the overload relay housing comprising; a plurality of pole sections, each pole section having an aperture to receive a conductor transversely therethrough and comprising; a primary magnetic flux path section having an air gap; a magnetic flux sensor disposed within the air gap of the primary magnetic flux path section and operatively associated with the printed circuit board; and a plurality of pole shielding slots, such that when electrical current flows through the conductor of each pole section, a resultant magnetic flux flowing in the direction of each primary magnetic flux path is substantially prevented by the pole shielding slots from reaching the magnetic flux sensor of another of the plurality of pole sections, thereby minimizing cross-pole magnetic flux sensor interference; wherein the connecting slot has a receiving channel to receive the retaining projection and a retaining channel narrower than the receiving channel such that when the contactor is coupled to the overload relay the retaining projection enters the receiving channel of the connecting slot and proceeds downwardly through the retaining channel until the flexing lock tab snaps into a lip of the contactor, thereby preventing removal of the overload relay from the contactor; and wherein when the contactor is coupled to the overload relay the flexible coil terminal abuts an electrical conductor on the printed circuit board to provide an electrical connection between the contactor and the overload relay. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A contactor assembly comprising:
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at least one stationary contact mounted within a contactor housing; a moveable contact mounted in operable association with the stationary contact; a moveable contact carrier slidably mounted to the contactor housing; an electromagnetic coil mounted to the contactor housing for attracting the moveable contact carrier; at least one flexible coil terminal attached at one end to the electromagnetic coil and extending out through the contactor housing; and a circuit board housing interlockingly coupled with the contactor and including a printed circuit board residing within the circuit board housing; wherein an abutting electrical connection between the flexible coil terminal and the printed circuit board is made when the circuit board housing is coupled to the contactor. - View Dependent Claims (25)
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Specification