Which safety device is used to prevent the overload of lifting equipment?

The load limiting device or overload protection switch is specifically designed to prevent the overload of lifting equipment. This device functions by monitoring the amount of load being lifted and automatically disconnects the lifting mechanism if that load exceeds a predetermined safe limit. This ensures that the equipment operates within its safe working load capacity, thereby preventing potential failures or accidents that could occur due to excessive weight.

In contrast, an emergency stop button is designed to provide immediate cessation of operation in case of a dangerous situation but does not prevent overloads specifically. A safety latch is used to secure components, preventing them from coming apart unintentionally during operation but it does not manage load limits. Meanwhile, a pressure relief valve is primarily employed to protect hydraulic systems from excess pressure rather than directly managing lift loads. Therefore, the load limiting device is the most relevant safety device for preventing overload in lifting equipment.