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Question #615

Which device limits the operating motions of an overhead crane's mechanisms?

Ogranicznikiem ruchów roboczych mechanizmów suwnicy jest:

a
a load limiter

ogranicznik udźwigu

b
the emergency stop switch marked STOP

łącznik awaryjnego zatrzymania „STOP”

c
a safety support bracket

łapa oporowa

d
a limit switch

łącznik krańcowy

Correct answer

Why?

A limit switch (łącznik krańcowy) stops the relevant motion when a preset travel limit is reached. A load limiter (ogranicznik udźwigu) responds to excessive load, not to a mechanism reaching the end of its travel. The STOP button allows the operator to make an emergency stop.

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