Improved device for the motor operator of a low-voltage circuit breaker

Abstract

This invention provides an improved device for a low-voltage circuit breaker electric motor operator. It addresses the limitations of conventional low-voltage circuit breaker electric motor operators, which typically only offer three functions: starting, closing, and manual reset after fault tripping. These functions fail to meet the actual application needs of the power system market. In addition to the above functions, this invention provides on-site and external operation for forced starting, forced closing, and reset / unforced termination. It also features an external operation lockout function, complying with Article 841 of the revised User Electrical Equipment Installation Rules (September 1, 2011) and Article 155, Paragraph 4, Subparagraph 1 of the current regulations (March 17, 2011). This prevents harm to personnel or equipment caused by accidental power supply or disconnection. Furthermore, this invention solves the problem that current low-voltage circuit breaker electric motor operators worldwide lack the aforementioned functions and is universally applicable to any brand of low-voltage circuit breaker, achieving economic efficiency. Its main technical features include a mechanism for a linked circuit breaker handle, a ball screw slide mechanism, an electric motor, an electric motor brake device, a motor drive controller, and an external command unit, which perform functions such as closing, opening, forced closing, forced opening, and resetting to release the forced state on the low-voltage circuit breaker.

Claims

1. An improved device for a low-voltage circuit breaker electric motor operator, comprising: The circuit breaker includes a handle mechanism, a ball screw slide mechanism, an electric motor, an electric motor brake device, a motor drive controller, and an external command unit. The handle mechanism is connected to the slide actuation and fixing unit of the ball screw slide mechanism. The handle mechanism operates according to the ball screw slide mechanism, moving the circuit breaker handle in the circuit breaker body between a closed (ON) position and an open (OFF) position. The ball screw slide mechanism is located within the circuit breaker body. The ball screw slide mechanism is connected to the electric motor on the left or right sides or above the body, and is powered by the electric motor to drive the ball screw slide mechanism. The electric motor is connected to the electric motor braking device mechanism and electrically connected to the motor drive controller. The electric motor is mounted on the ball screw slide mechanism linkage mechanism. The electric motor braking device provides power-off braking or power-on braking functions to limit the operation of the electric motor or prevent it from operating. The electric motor operates according to the motor drive controller. The system is configured to actuate and drive the ball screw slide mechanism. An electric motor brake device is connected to the electric motor mechanism and electrically connected to the motor drive controller. The electric motor brake device operates according to the command of the motor drive controller, limiting the operation of the electric motor or preventing it from operating. The motor drive controller is electrically connected to the external command unit. The motor drive controller has a receiving unit that receives the status of the external command unit, which is then transmitted via a microprocessor in an internal electronic circuit to an output unit that is electrically connected to the electric motor and the electric motor brake device. The external command unit is electrically connected to the electric motor and the electric motor brake device. The external command unit can be a control panel. The control panel has an ON button switch, an OFF button switch, a forced ON button switch, a forced OFF button switch, a reset button switch, and a key selection switch, providing at least three command functions.When the ON or OFF button switch in the external command unit is actuated, the microprocessor in the motor drive controller sends a message via the output unit to actuate the electric motor, which drives the ball screw slide mechanism to the mechanism of the circuit breaker handle, thereby actuating the circuit breaker handle in the circuit breaker body to the closed ON position or the open / closed OFF position. When the forced ON or forced OFF button switch is actuated, the microprocessor in the motor drive controller sends a message via the output unit to actuate the electric motor, which drives the ball screw slide mechanism to the mechanism of the circuit breaker handle, thereby actuating the circuit breaker handle in the circuit breaker body to the closed ON position and restricting the electric motor brake device to the closed ON position, or to the open / closed OFF position and restricting the electric motor brake device to the closed ON position. The braking device is restricted to the open / off position. When the reset button switch is activated, the microprocessor in the motor drive controller sends a message through the output unit to activate the electric motor braking device to release the brake. When the key selector switch is activated, the microprocessor in the motor drive controller sends a message through the output unit to activate the electric motor and the electric motor braking device, which in turn activates the ball screw slide mechanism to drive the mechanism of the circuit breaker handle, thereby actuating the circuit breaker handle in the circuit breaker body to the closed (ON) or open / off position. The low-voltage circuit breaker electric motor operator improvement device will only release the previous state when the key selector switch switches states. The low-voltage circuit breaker electric motor operator improvement device can achieve the functions of closing, opening, forced closing, forced opening, and reset.

2. An improved device for a low-voltage circuit breaker electric motor operator, comprising: The circuit breaker includes a handle mechanism, a ball screw slide mechanism, an electric motor, an electric motor brake device, a motor drive controller, and an external command unit. The handle mechanism is connected to the slide actuation and fixing unit of the ball screw slide mechanism. The handle mechanism operates according to the ball screw slide mechanism, moving the circuit breaker handle within the circuit breaker body between a closed (ON) position and an open (OFF) position. The ball screw slide mechanism is located on the left or right side or top of the circuit breaker body and is connected to the electric motor, which provides power to drive the ball screw slide mechanism. The electric motor is connected to the electric motor brake device mechanism. The electric motor is electrically connected to the motor drive controller. The electric motor is mounted on the ball screw slide mechanism linkage. The electric motor braking device provides power-off braking or power-on braking functions to limit the operation of the electric motor. The electric motor operates according to the instructions of the motor drive controller to drive the ball screw slide mechanism. The electric motor braking device is connected to the electric motor mechanism and electrically connected to the motor drive controller. It is mounted on the ball screw slide mechanism and operates according to the instructions of the motor drive controller to limit the operation of the electric motor. The motor drive controller is electrically connected to the external command unit. The device is equipped with a receiving unit that receives the status of the external command unit. This information is then transmitted via a microprocessor within an internal electronic circuit, and according to the microprocessor's instructions, to an output unit that is electrically connected to the electric motor and the electric motor braking device. The external command unit is electrically connected to the electric motor and the electric motor braking device. The external command unit includes an ON button switch, an OFF button switch, a forced ON button switch, and a forced OFF button switch. When the ON button switch or the OFF button switch in the external command unit is activated, the microprocessor in the motor drive controller sends a message via the output unit to activate the electric motor, which in turn drives the ball screw slide mechanism to activate the mechanism that links the circuit breaker handle. In the circuit breaker body, the circuit breaker handle is actuated to the closed ON position or the open / closed OFF position. When the forced ON button switch or the forced OFF button switch is actuated, the microprocessor in the motor drive controller sends a message through the output unit to actuate the electric motor. The ball screw slide mechanism drives the mechanism that links the circuit breaker handle to actuate the circuit breaker handle in the circuit breaker body to the closed ON position and restrict the electric motor brake device to the closed ON position, or actuates the handle to the open / closed OFF position and restricts the electric motor brake device to the open / closed OFF position. The improved low-voltage circuit breaker electric motor operator device can achieve the functions of closing, opening, forced closing, and forced opening.

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