What is a tower crane without a collector?
Once again, because the collector is using carbon brush and copper ring contact, the tower crane work in the sway of the impact is too large, easy to cause carbon brush and copper ring arc between burning. Combined with this reason, today's tower cranes do not use collector. The drawback is that the tower crane can not be one-way one-way rotation. So now the use of rotary limiter, set the tower one-way rotation can only turn 540 degrees, want to turn, can only turn in the opposite direction.
The advantage of the collector is that the tower crane can be turned on one side without any limit, and how many circles can be turned. The tower crane is basically not equipped with collector, because collector generally needs to be located at the center of the tower's turning center, so it is inconvenient for operators to go up and down.
Without the collector, the main cable of the tower crane directly reaches the power distribution cabinet after turning.
