Question #470
Electrical safety devices used in overhead cranes include:
Zabezpieczeniami elektrycznymi stosowanymi w budowie suwnic są:
a
rail sweepers
zgarniacze szynowe
b
anti-drop supports
łapy oporowe
c
crane mechanism motors
silniki mechanizmów suwnicy
d
limit switches
łączniki krańcowe
Correct answer
Why?
Limit switches (łączniki krańcowe) operate in the electrical circuit and stop the relevant movement when a limiting position is reached. A motor provides drive rather than protection, while rail sweepers (zgarniacze) and anti-drop supports (łapy oporowe) act mechanically.