What is a major difference between traction and hydraulic elevators?

Traction elevators utilize a system of cables and pulleys to lift the elevator cab. This design allows them to move efficiently, especially over taller distances. The cables are attached to a counterweight, which helps balance the load of the elevator, making it easier for the motor to operate and reducing energy consumption. Because of this system, traction elevators can handle heavier loads and achieve higher speeds compared to hydraulic elevators.

In contrast, hydraulic elevators use a fluid-driven piston to lift and lower the cab, which is effective for shorter distances but generally does not allow for the same speeds as traction systems. The use of cables and pulleys in traction elevators is a key aspect that allows for their broader capabilities in terms of height and speed.