The term plugging refers to:

The term plugging refers to:

• A. Slow forward movement
• B. Reversing power for stopping
• C. Locking the crane brakes
• D. Slow hoisting moments

Answer: (B)

Plugging is a braking method that works by reversing the electrical power to the drive motor so it produces torque opposite to the direction of travel. When this happens, the motor acts like a generator, dissipating energy and creating a braking force that quickly stops the crane’s motion. This technique is used for rapid, controlled stops, especially in tight spaces or when precise positioning is needed, and it’s separate from simply applying the brakes or letting the load coast. It’s not about moving slowly or about slow hoisting; it’s about reversing power to oppose motion to bring the system to a stop.

Plugging is a braking method that works by reversing the electrical power to the drive motor so it produces torque opposite to the direction of travel. When this happens, the motor acts like a generator, dissipating energy and creating a braking force that quickly stops the crane’s motion. This technique is used for rapid, controlled stops, especially in tight spaces or when precise positioning is needed, and it’s separate from simply applying the brakes or letting the load coast. It’s not about moving slowly or about slow hoisting; it’s about reversing power to oppose motion to bring the system to a stop.