Motor control center relay reset mechanism
AssigneeSquare D Company
InventorRichard Daryl Pugh
Life of this patent
Estimating the term…
Abstract
The present invention comprises a reset mechanism for an overload relay. More particularly, the present invention comprises a mechanism that will reset a plurality of overload relay within a starter in a motor control unit. A single point-to-two point overload reset mechanism allows for the use of a single manual door reset button and extension arm to depress the single point-to-two point overload reset mechanism, which in turn depresses a plurality of overload relay reset buttons. Following contact with the overload relay reset buttons, the single point-to-two point overload reset mechanism returns to a non-contact position with respect to the overload relay reset buttons.
Claims15
A motor control center for housing a starter assembly, comprising:
- (a) at least two overload relays, each said overload relay having a separate reset element for resetting its respective relay from an open circuit to a closed circuit;
- (b) a mechanism for substantially simultaneously resetting each of said at least two overload relays, said mechanism including:
- (1) a retractable member having a contact member adjacent each said reset element, said retractable member upon application of force adapted to move between a first non-contact position to a second contact position, wherein said contact member comes in contact with each of said overload relay reset elements when moved from the first non-contact position to the second contact position to reset each of said overload relays;
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- (2) a retraction device for moving said retractable member from the second contact position to the first non-contact position upon release of a force from said retractable member.
A motor control center, comprising:
- (a) at least one control unit housed within the motor control center;
- (b) at least two overload relays conductively connected to said at least one control unit, each said overload relay having a separate reset element for resetting its respective relay from an open circuit to a closed circuit;
- (c) a mechanism for substantially simultaneously resetting each of said at least two overload relays, said mechanism including:
- (1) a retractable member having a contact member adjacent each said reset element, said retractable member upon application of force adapted to move between a first non-contact position to a second contact position, wherein said contact member comes in contact with each of said overload relay reset elements when moved from the first non-contact position to the second contact position to reset each of said overload relays;
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- (2) a retraction device for moving said retractable member from the second contact position to the first non-contact position upon release of the force from said retractable member.
A motor control center comprising:
- (a) at least one control unit housed within the motor control center;
- (b) at least two overload relays conductively connected to said at least one control unit, each said overload relay having a separate reset element for resetting its respective overload relay from an open circuit to a closed circuit;
- (c) a mechanism for substantially simultaneously resetting each of said at least two overload relays, said mechanism comprising:
- (1) a retractable member configured to avoid any obstruction positioned between a reset button mounted on a door of the motor control center and said at least two overload relays, said retractable member having a contact member associated with each said reset element, said retractable member upon application of force adapted to move between a first non-contact position to a second contact position, wherein said contact member comes in contact with its associated reset element to substantially simultaneously reset each of said at least two overload relays;
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- (2) a retraction device for moving said retractable member from the second contact position to the first non-contact position upon release of the force from said retractable member.
Dependencies are inferred from the claim text.