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Patent

Miniaturized solenoid operated trip device

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TLDR
In this paper, a solenoid operated circuit breaker trip device has a base defining a guide channel (38) and an actuator (32) that slides in the guide channel and interacts with a contact breaking mechanism (24) having a trip bar (36) operable to make or break electrical contacts.
Abstract
A solenoid operated circuit breaker trip device has a base defining a guide channel (38) and an actuator (32) that slides in the guide channel and interacts with a contact breaking mechanism (24) having a trip bar (36) operable to make or break electrical contacts. A spring (34) biases the actuator toward the trip bar. A solenoid (28) on the base electromagnetically displaces a plunger (62) along a linear path and is coupled to a trigger (26) having a latching surface (46) that holds or releases the actuator. The guide channel runs parallel to the path of the plunger, adjacent the solenoid. The trigger is L-shaped and pivoted on a pivot pin (52) between two legs (54,56) of its L-shape, on an axis transverse to the path of the plunger. One of the two trigger legs (56) is coupled to the plunger, and the other (54) has an engagement surface that is moved behind a complementary surface (44) of the actuator to selectively block its displacement. The base can be a slotted frame attached to the solenoid or a molded housing having an interior cavity for receiving the solenoid. A return spring (84) urges the trigger toward the latching position.

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Citations
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Patent

Auxiliary trip device for a circuit breaker

TL;DR: An auxiliary trip device for a circuit breaker which includes an electromechanical actuating device and an energy storage system is described in this paper, where the push-rod is slidable within the bore to actuate a latch device of the energy storage, which in turn releases a blade which is cooperable with a trip bar of the circuit breaker on which the auxiliary trip devices are placed.
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References
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Patent

Circuit breaker electrical closure control apparatus

TL;DR: In this paper, a closed solenoid is coupled with a hook apparatus for releaseably holding breaker movable contacts in a hooked open position against the closing force of a charged breaker operating mechanism.
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Circuit for controlling the orientation of a magnetic field

TL;DR: In this article, a circuit for controlling the orientation of magnetic fields is provided for a flux shunt trip device in a circuit breaker, which when released to its extended position causes the circuit breaker to trip.
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Accessory mounting module for J and K frame breakers

TL;DR: In this article, a multi-functional mounting module for J and K frame breakers utilizes an accessory post for mounting a plurality of breaker accessories for common actuation by means of a resettable tripping mechanism cooperating with the breaker trip assembly.
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Solenoid operated trip device

TL;DR: In this article, a solenoid operated circuit breaker trip device has a slidable actuator 32 that interacts with a contact breaking mechanism 24 having a trip bar 36 operable to make or break electrical contacts.