KJFD-03/MX Intelligent Electric Operation Solution, featuring an MCU chip integrated circuit for intelligent judgment of the closing/opening status of the load switch, performs electric operations on the mechanism according to customer instructions, enabling local closing/opening and remote closing/opening functions. It offers protection against motor overload, undercurrent, or jamming, ensuring the safety of critical components. The controller is equipped with a fault signal notification function, greatly facilitating daily maintenance.

KJFD-03/NX Standard Electric Operation Plan, featuring PCB-type terminal integration, the electric operation of the mechanism is achieved by relay contacts within the controller. It does not have motor protection or fault alert functions, and is categorized as an economical electric operation plan.

This series of products is factory-shipped after full inspection and conforms to the requirements of GB 3804-2004 "AC High Voltage Load Switches - 3.6KV to 40.5KV," GB 3906-2006 "AC Metal-Enclosed Switchgear and Control Equipment - 3.6KV to 40.5KV," and "High Voltage AC Load Switch-Fuse Combination Appliances."

Operation Instructions

Closing operation:

Manual Closing: The mechanism is mounted and secured in the cabinet, then the handle is inserted into the operating shaft at the top of the mechanism and rotated clockwise approximately 90°. The mechanism's coiled double spring is compressed to store energy. Press the closing button to release the stored energy in the closing spring, and the main circuit of the load switch is closed under the power of the mechanism's release. Electric Closing: The mechanism sends a closing signal, and the controller automatically identifies the opening and closing positions of the load switch and the status of each interlock circuit. Once all circuits meet the conditions for closing, the controller activates the closing solenoid to release energy, achieving an instant closure of the main circuit of the load switch.

Operation: Disconnecting Switch

Manual Breaker: Release the technical breaker button to initiate the operation, which, under the release force, pushes the load switch to complete the main circuit breaker action. For electric breaker, a release signal is provided. The controller will automatically detect the position of the load switch and the status of each interlock circuit. If all circuits meet the conditions for disconnection, the controller will automatically activate the breaker solenoid to release energy, achieving the main circuit breaker disconnection of the load switch. The mechanism can perform main circuit closing or grounding closing operations when in the disconnection state.

Grounding and Switching:

Grounding Closing: Insert the mechanism handle into the grounding operation shaft at the bottom of the mechanism and rotate clockwise approximately 90°. The grounding energy accumulator releases its energy instantaneously at the midpoint of compression, pushing the grounding switch to complete the grounding closing. At this point, the mechanism interlock locks, preventing main circuit closing.
Grounding Break: Insert the mechanism handle into the grounding operation shaft at the bottom of the mechanism, rotate counterclockwise approximately 90°. The grounding accumulator releases energy instantaneously when the compression reaches the midpoint, thereby actuating the grounding switch to complete the grounding break. At this point, the mechanism interlock is in the open position, allowing for closing and opening operations on the load switch.

Actuator external and installation dimensions