Improved control device for low-voltage air circuit breaker

Abstract

This invention discloses an improved control device for low-voltage air circuit breakers, which improves upon conventional low-voltage air circuit breakers that cannot achieve forced closing and forced opening functions, thus failing to meet the needs of practical market applications. The improved control device comprises a power supply unit, an electrical operation control unit, a manual operation restriction unit, and an external command unit. The microprocessor of the electrical operation control unit operates according to a programmed sequence, enabling normal opening and closing. The manual operation restriction unit restricts the manual operation function of the low-voltage air circuit breaker, thereby enabling the low-voltage air circuit breaker to achieve forced closing and forced opening functions, effectively preventing the deficiencies of accidental power supply and disconnection.

Claims

1. A control improvement device for a low-voltage air circuit breaker, connected to a low-voltage air circuit breaker body, the low-voltage air circuit breaker further comprising: a main contact body unit, a control power supply circuit, an electronic tripping relay, an electric motor spring energy storage unit, a manual operating handle, a spring energy storage linkage mechanism, a manual start-stop button switch, a manual close-stop button switch, a start-stop actuation mechanism, a close-stop actuation mechanism, a start-stop tripping coil, and a close-connection coil, the low-voltage air circuit breaker control improvement device comprising: A power supply unit, an electrical operation control unit, a manual operation restriction unit, and an external command unit; The power supply unit steps down and rectifies the AC power into a suitable DC operating power supply, which is electrically connected to the electrical operation control unit as its operating power supply. The electrical operation control unit is electrically connected to the power supply unit and includes a microprocessor and a motor drive unit. The microprocessor executes the logic requirements of the motor drive unit according to a preset program, and issues information based on the external instruction unit. When the trip coil is activated, the low-voltage air circuit breaker is opened; when the closing coil is activated, the low-voltage air circuit breaker is closed; when the manual operation restriction unit is activated, the manual trip button switch and the manual closing button switch of the low-voltage air circuit breaker are closed, restricting the operation of the low-voltage air circuit breaker. The circuit breaker is designed for manual operation. The manual operation restriction unit is electrically connected to the electrical operation control unit. The manual operation restriction unit includes an electric motor, a linkage device, and a stop plate. According to the microprocessor's instructions, the manual operation restriction unit actuates the electric motor, linkage device, and stop plate, thereby blocking the manual start / stop button switch and the manual close button switch, thus restricting the manual operation function of the low-voltage air circuit breaker. The external command unit is electrically connected to the electrical operation control unit. The external command unit includes a normal start / stop command, a normal close command, a forced start / stop command, and a forced close command. When the normal start / stop command is actuated, it is electrically connected to the electrical operation control unit, and the microprocessor sends a message to actuate the start / stop trip. When the coil is activated, the low-voltage air circuit breaker is opened and closed. When the normal closing command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the closing coil, closing the low-voltage air circuit breaker. When the forced opening command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the opening trip coil and the manual operation restriction unit, opening the low-voltage air circuit breaker and blocking the manual opening and closing push-button switches, restricting the manual operation function of the low-voltage air circuit breaker. When the forced closing command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the closing coil and the manual operation restriction unit, opening the low-voltage air circuit breaker. The device closes the circuit breaker and blocks the manual start / stop button switch and the manual close button switch, thus restricting the manual operation function of the low-voltage air circuit breaker. The improved control device for the low-voltage air circuit breaker enables the circuit breaker to start when the normal start / stop command is activated, closes when the normal close command is activated, starts when the forced start / stop command is activated, and blocks the manual start / stop button switch and the manual close button switch to restrict manual operation when the forced close command is activated, thereby achieving the functions of starting, closing, forced start / stop, and forced close of the low-voltage air circuit breaker.

2. A low-voltage air circuit breaker control improvement device, connected to a low-voltage air circuit breaker body, the low-voltage air circuit breaker further comprising: a main contact body unit, a control power supply circuit, an electronic tripping relay, an electric motor spring energy storage unit, a manual operating handle, a spring energy storage linkage mechanism, a manual start-stop button switch, a manual close-stop button switch, a start-stop actuation mechanism, a close-stop actuation mechanism, a start-stop tripping coil, and a close-connection coil, the low-voltage air circuit breaker control improvement device comprising: One power supply unit, one electrical operation control unit, one locking disc door unit, and one external command unit; The power supply unit steps down and rectifies the AC power into a suitable DC operating power supply, which is electrically connected to the electrical operation control unit as its operating power supply. The electrical operation control unit is electrically connected to the power supply unit and includes a microprocessor and a motor drive unit. The microprocessor executes the logic requirements of the motor drive unit according to a preset program, and interprets and sends information from the external command unit. When the trip coil is activated, the low-voltage air circuit breaker is opened; when the closing coil is activated, the low-voltage air circuit breaker is closed. The locking panel unit is activated to enclose the low-voltage air circuit breaker within the enclosure, restricting its movement. The compressed air circuit breaker has a manual operation function; the locking panel unit is electrically connected to the electrical operation control unit. The locking panel unit is equipped with an electric operating unit and a linkage unit. The locking panel unit, according to the microprocessor's instructions, actuates the electric operating unit and the linkage unit to lock the inner door panel of the enclosure, restricting the manual operation function of the low-voltage air circuit breaker; the external command unit is electrically connected to the electrical operation control unit. The external command unit is equipped with a normal start-up command, a normal close-up command, a forced start-up command, and a forced close-up command. When the normal start-up command is actuated, it is electrically connected to the electrical operation control unit, and the microprocessor sends information. When the tripping coil is activated, the low-voltage air circuit breaker is opened. When the normal closing command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the closing coil, closing the low-voltage air circuit breaker. When the forced opening command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the tripping coil and the interlocking door unit, opening the low-voltage air circuit breaker and locking the inner door panel of the enclosure, restricting the manual operation function of the low-voltage air circuit breaker. When the forced closing command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the closing coil and the interlocking door unit, opening the low-voltage air circuit breaker and locking the inner door panel of the enclosure, restricting the manual operation function of the low-voltage air circuit breaker. When the forced closing command is activated, it is electrically connected to the electrical operation control unit. The microprocessor sends a message to activate the closing coil and the interlocking door unit. The control unit closes the low-voltage air circuit breaker and locks the middle panel of the inner door of the enclosure, restricting the manual operation of the low-voltage air circuit breaker. The improved control device for the low-voltage air circuit breaker operates as follows: when the normal start-stop command is activated, the low-voltage air circuit breaker starts; when the normal close command is activated, the low-voltage air circuit breaker closes; when the forced start-stop command is activated, the low-voltage air circuit breaker starts and locks the middle panel of the inner door of the enclosure, restricting manual operation; when the forced close command is activated, the low-voltage air circuit breaker closes and locks the middle panel of the inner door of the enclosure, restricting manual operation. This achieves the functions of starting, closing, forced start-stop, and forced close of the low-voltage air circuit breaker.

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